nordic competence

The Nordic region, primarily Sweden and

Finland, is a relatively small geographical

area and certainly does not have a huge

population, but companies headquartered

there, with global manufacturing and supply

chains, are immensely important to modern day

mining. Through acquisition and organic growth,

both Atlas Copco and Sandvik are now very

important players in the exploration field and

that sector is also represented by companies

such as SkyTEM, Kati, Devico, Arctic Drilling and

ABEM Instrument.

Sandvik (with a presence in every sector

mentioned here) and Atlas Copco (now

incorporating GIA) are also of course dominant

players in underground hard rock trackless

equipment, with Sandvik also a significant

supplier to underground coal mines. In the

trackless sector there are also key specialist

vehicle suppliers like Veekmas, Normet and

Contector. And Nordic Lights and Finnradiator

supply equipment for many such units. The two

big players are also important suppliers of rock

tools, and then there are Robit and Driconeq, for

example, with KVX offering a wide range of

ground engaging tools. Innovative drills are the

speciality of Wassara.

On surface in open-pits and for long-distance

ore haulage, Scania is expanding its presence in

mining. Volvo Construction Equipment is a major

supplier of ADTs, wheel loaders and more, and

Volvo Penta engines are widely used underground.

Two of today’s biggest mineral processing

suppliers are headquartered in Finland –

Outotec (incorporating Larox) and Metso.

Companies like Kopar and Minpro International

are also important.

Automation is another field of leadership and

at MassMin this year ABB’s Stefan Sjöström,

Process Automation/Mining and Kjell Carlsten,

Regional Sales Manager, presented the paper

Mobile integration - the future of optimised

underground mining, resource utilisation and

logistics. In this, they considered future mines

that will employ “fewer workers for manual jobs

and more qualified operator experts for product

and process optimisation, maintenance planning

and environmental control.

“The operator experts will need to interact

with each other to cover the complete value

chain. The central mine control room would be

the target and future solution. It is expected that

the operator experts would be able to control

perhaps several mines. Sensors and automated

systems provide mine operators with real time,

essential information for each product and

process control. Future mining will require a

high degree of integration in product and

process optimisation, maintenance planning,

environmental control, etc.; all from the central

mine control centre.”

In this way, mines will be able to optimise the

utilisation of underground equipment and

increase mine productivity, while reducing

energy consumption. ABB’s underground mining

offers the possibility to integrate real time data

from different types and manufacturers of

underground equipment into ABB’s open

Process Control System 800xA. This allows for

better visualisation and utilisation of the

equipment fleet, including tracking machine

locations and their status, actual operating

environments underground, etc. “This will allow

the operator experts to make the right decisions

to keep production flow as smooth as possible.”

This paper shows the potential in mobile

integration and also provides an existing

example where Atlas Copco machines have been

integrated into the 800xA system.

In July, Atlas Copco celebrated the sale of its

100th Scooptram ST7 LHD, with Vostok-Metall

Trans of Kazakhstan placing the order for the

world’s 100th machine. The LHD will be used for

contract underground development work at

Ridder-Sokolnyi, which is a gold mine operated

by Kazzinc, located in East Kazakhstan.

The ST7 journey began at the field test stage

when Sweden’s Lovisa mine gave it “top marks

for productivity, serviceability and comfort,

reporting dramatic improvements in loading

operations as well as the operator’s

underground working environment.” The

German industrial minerals group, Geomin

Erzgebirgische Kalkwerke, became the first in

Germany to introduce the Scooptram ST7 at its

white marble mine in Hermsdorf near the Czech

border, recently reported by IM. Service

intervals are longer than for older generation

LHDs at the mine, and fewer spare parts are

needed due to improved parts wear. The vehicle

features an air conditioned cab, lower noise

levels, improved lighting and more efficient

emergency/alarm systems. It also has excellent

traction control which is easy on the tyres,

meaning fewer tyre changes or longer tyre life.

The on-board computer calculates the optimum

power needed at any one time during

operations, resulting in lower fuel consumption

and lower emissions, compared with operating

on full throttle for most of the time.

At the end of August, HighGrade reported on

44 International Mining | OCTOBER 2012

NORDIC FOCUS

Nordic competence

IM’s annual review ofwhat is new in

technologies andservices from thesmall but hugelyimportant region

the presentation of Atlas Copco’s new E Series

production (long-hole) drill rigs, which Global

Tunnelling and Mining Equipment Technical

Services Manager Patrik Ericsson said were

aimed at the Australian and Russian

markets, primarily, and particularly with

larger-diameter rock drills, with some

initial demand also anticipated in North

America.

The aim for the E7 C was to

automate the whole process

including drill positioning and bit

changing, with boom-mounted drilling. So

Atlas Copco had to come up with a stronger

boom with a different motion path, that was

more stable than previous booms. The BUT 45

was available already and is a well proven

system, so it was chosen. The heavy-duty BUT

45 boom, introduced in 2005, has been a

standard feature of the company’s Boomer

development drills and Boltec rigs for some

time. The Atlas Copco choice, besides the E7 C,

is now the Simba ME7 C (51-89 mm diameter

holes standard), E7 C-ITH (in-the-hole; 92-178

mm) and Simba W7 C (with Wassara water-

powered hammer). “The E7 is quite similar to

the ME7 but it can carry the heavy rock drills,

and when I say the heavy rock drills that means

the COP 36 to the COP 4050 – the really big

guns that we can offer,” Ericsson said.

“Atlas Copco has received plenty of

encouragement from Newcrest and others to

sink more money into new generation remote

control and automation technologies, and these

were also a feature of the Perth presentation

and will be front and centre in Las Vegas,”

HighGrade reported.

“If you look at the global picture there are a

few mines in the world that are using single

teleremote or multi-teleremote systems but for

sure, talking to customers at the global level

again, this is coming more and more,” Ericsson

said. “There are more and more requests to

operate the machines on a teleremote system,

so this is increasingly going to become a reality.

By using multi-teleremote you can have one

operator working with several machines.”

Atlas Copco’s Total Station Navigation (TSN)

system too is being used increasingly in mines,

as well as the more traditional civil tunnelling

applications. “It enables you to really position

the machine accurately in the tunnel and in the

mine’s coordinate system,” Ericsson said.

“During tests run here in Australia, and in Sweden,

and other markets also, if we implement ABC

[Advanced Boom Control] Total, the [automatic

drill] bit changer, and other intelligent functions

we see that in those cases that we increased the

productivity by some 20%,” Ericsson said.

Avoiding problems with stakeholders is an

increasing concern for responsible operations. A

management system now takes complete care

of all mining-related environmental concerns

such as noise, vibration and dust, allowing

operators to subscribe to an external company

that entirely takes care of their monitoring

requirements.

Results are displayed in a web-based control

application that shows current and upcoming

events, allowing real-time operational

management and fast decisions. A separate

public stakeholder web application allows

access to information such as current and

upcoming events, helping companies to reach

out and engage local communities.

By offering complete management, as

opposed to monitoring systems, subscribers can

optimise their operations around limits such as

daily noise allowances and ensure mining

output remains maximal while staying within

the limits. They can respond in real-time to

unplanned events by lowering emissions to

avoid stoppages, or increase operations where

extra scope is clearly visible within the limits.

Operators get the added bonus of having an

independent company in charge of measuring

their outputs, with that company – Brüel & Kjær

– representing, it says, “the highest level of

sound and vibration expertise available

worldwide.” Brüel & Kjær employees establish

and maintain the entire monitoring systems.

During the company’s long experience with

environmental management solutions, the key

to preventing and mitigating objections from

local residents has been

effectively and clearly

communicating – not

just conformance – but

also general

operational information

that helps include locals in

the information flow.

Companies adopting a

management solution

also find the process of obtaining mining

licences can be smoother, as a clear

commitment to stakeholder engagement helps

to make them more accepting at the beginning

of the process. In addition, it delivers a clear

benefit when it comes to repeat business, as

Brüel & Kjær’s Jan Hansen explains, “The

stakeholder web interface makes future

expansion much easier, as companies can refer

back to the successful mitigation in their

previous projects.”

Field tests of the new CJC™ Mobile Flushing

Unit (MFU) reveal how used gear oil turns

cleaner than new oil. C.C.JENSEN says “the CJC

MFU saves time and unexpected breakdowns,

and it is easy to operate.

“The MFU is a well-documented solution if

you want to ensure that trucks are constantly

operational, and the aim is to avoid unexpected

breakdowns and save frequent oil changes.

Various field tests, e.g. in the cold areas of

Canada, have proven, that the CJC MFU exceeds

expectations when it comes to quick and

effective filtration of thick gear oils – even at

very low temperatures.”

Over a period of months, the MFU has been

tested on wheel motors and differentials of, for

example, Komatsu and Caterpillar machines.

Within the time frame of planned service checks,

the oil has been cleaned to a contaminant level

below the specified cleanliness. In certain


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Brüel & Kjær’s Mining Sentinel

gearboxes, with hundreds of litres of oil, the

task has been solved in very few hours.

Contamination removed from the oil could be

particles, water or oxidation products.

The principle of operation is to drain and

flush the oil in the gearbox through a hose. The

oil can temporarily be stored in a 280-litre tank

in the MFU itself, and be pumped from the tank

to the gearbox through special CJC Filter Inserts,

as many times as necessary. An oil preheater

ensures that the oil can circulate with maximum

speed, and a particle monitor gives the

possibility to stop the process when the desired

cleanliness level has been obtained.

Furthermore, the monitor measures and logs the

degree of cleanliness throughout the whole

filtration process.

Today, oil changes are still common, but to

drain a gearbox and fill it up with new oil is

actually very expensive, the company explains,

the problem is well known. It is difficult to

remove old oil and therefore the remaining

particles contaminate the new oil when it is put

in the tank. The result is unnecessary wear and

too high a risk of inconvenient and costly

breakdowns.

In an operating example, a CJC MFU was

installed on a Komatsu 930E truck wheel motor,

containing 100 litres of Mobil SHC 680 gear oil.

Oil analysis carried out before filtration and

flushing with the unit showed a very high level

of contamination – an ISO Cleanliness Code of

25/25/23. After only 90 minutes of filtration this

had been greatly improved to 16/15/11. As a result,

the company not only avoided an oil change, but

managed a very quick and easy service and

reduced the risk of a costly breakdown.

In the northwest of Norway the Norwegian

Public Roads Administration (NPRA) has just

completed a tunnel

investigation core

drilling program in

collaboration with

Devico. The coring was

for a subsea tunnelling

project that is planned

to connect multiple

islands north of

Ålesund to the

mainland.

Three boreholes of

between 450 and 550

m in length were

drilled along planned

tunnel trajectories. The

borehole paths were defined by NPRA and it was

up to the drilling contractor to follow these

paths. Norwegian Drilling used its Atlas Copco

U8 drill rig with N-size drill string.

As the boreholes had strict paths to follow,

which also included changes in inclination and

azimuth, directional core drilling was necessary.

The directional core drilling and surveying

technology, as well as service technicians were

supplied by Devico. Its technology has been

used in several geotechnical and mining

projects worldwide over the last 20 years, and,

the company says, “is the only commercial

technology providing core during the steering

process.”

The first borehole was

drilled over a two-month

period at the end of 2011

on a small unpopulated

island with harsh

weather conditions from

the Atlantic sea. The 500

m deep hole was started

with an inclination of -

25°, which it was to be

maintained until a depth

of 100 m. From there the

hole inclination was to

be -5° using a curvature

radius of 400 m

(approximately 0.15° per

meter drilled), and this

inclination was continued

to the end of the hole.

Due to natural

deviation lifting the

hole, the first

steering was

initiated at 150

m, and ended

two weeks later

at 290 m. As the

hole continued to

lift naturally a short

correction run was

performed at 400 m depth, and with this the

hole was successfully kept close to the initial

plan over its full length.

The second borehole was straight with only

minor changes in inclination. The main problems

were poor ground conditions and natural

deviation that pulled the hole upwards.

Cementation work and four directional

corrections were necessary to finish the hole

and keep it close to the planned trajectory.

The final, 450 m deep hole was finished over

one month following directly after the second

hole. With a start inclination of -20° the hole

was steered 15° to -5° over a stretch of 80 m.

The directional work took less than five shifts to

complete, achieving an average of over 15

m/shift. Two more corrections were performed

later on to control the strong natural deviation

tendencies occurring also in this hole.

The most popular of the Doofor-built rock drill

models has a successor. The DF530X hydraulic

rock drill represents new thinking in many

aspects, the company says. It is a high

frequency rock drill in the 10 kW power class

with a female hexagonal chuck. “By the help of

adjusting the valve movement and by

minimising the rock drill hydraulic fluid

dissipation, the economy can be improved up to

20%. With less need for hydraulic oil, the

operator can enjoy reduced fuel costs and lower


NORDIC FOCUS

The CJC MFU is designed and tested to filtergear oils during the planned inspectionintervals and the filtered oil appears to be evencleaner than new oil. Therefore, many oilchanges can be avoided - a benefit to theenvironment and a great operating cost benefit

Thecoring project

involving Devicofinished on schedule in

late summer 2012. The threeholes drilled were all successfully

completed at acceptable distancefrom the required paths. With full core

recovery also during the steered sections,NPRA got the detailed geological information that

will be of significant value when estimating the costand process of the tunnel construction


emissions. The new sealing solutions of the

piston [provide] longer the [seal] life and lessen

oil leaks.”

Separate lubrication of the flushing tube

minimises frictions inside the piston which

maximises the life of the piston and flushing

tube. Drill hole flushing in the DF530X can be by

air, water or air-water-mist.

This new hydraulic rock drill can better

withstand pressure variations in the hydraulic

system which leads to longer lives for seals and

body parts by dramatically reducing any

cavitation. With improved cast components and

sealing materials, the rock drill body is even

better sealed than before.

Doofor Product Designer Jaakko Hämäläinen

explains that this rock drill has gone through

tough tests in Finland, Brazil and China. He also

says it, “is economical and power efficient. We

can recycle 95% of the components, which

makes it a green product.”

FF-Automation has more than 30 years of

expertise in designing and manufacturing

advanced automation products. Many mines

uses its robust AutoLog® RTUs (Remote Terminal

Units) in applications where control of machines

underground or the transmission of data from

different locations to another is needed.

Security applications are also an important use

for RTUs because they give a good

solution for different applications to send

reports and alarms to a central control

room. FF-Automation’s RTUs can be also

remotely monitored and controlled by

its ControlMan Web-based Cloud

solution.

Flowrox (formerly Larox Flowsys) is

known for its environmentally friendly

and cost effective valve and pump solutions

for demanding process conditions. Constant

product development has generated the newest

innovation, the LPP-T100 hose pump. It can

pump a maximum flow of 100 m³/h at pressures

up to 10 bar. Using the unique Flowrox roller

design, the pump will deliver 31 litres per single

360o revolution and still only requires 25 litres

of lubricant, says Markus Rossi, Manager of

Hose Pump Technology at Flowrox. “We have

proven performance in the toughest

applications, handling heavy duty media

especially in mining, minerals and metallurgy.

Thickener underflow is an excellent application

for the LPP-T100 hose pump.”

With over 100,000 deliveries during over 30

years of experience in flow control technology,

Flowrox is well-known also for its heavy duty

pinch and knife gate valves as well as

progressive cavity pumps. Flowrox hose pumps

are ideal for pumping various slurries and

dosing a wide range of abrasive, corrosive,

viscous or crystallising media, says

Rossi. Flowrox hose pumps

incorporate an advanced

design, which eliminates

friction, maximises hose life

time and reduces energy

consumption, he continues.

They offer various process

benefits, such as:

Continuous flow rate 24/7

without overheating, resulting

in higher flow with a smaller pump

■ Accurate flow

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Fluid-Bag is a privately owned Finnish

company headquartered in Jakobstad. For the

past 30 years it has developed and

manufactured what it says is, “a unique range of

900 and 1,000 litre flexible one trip containers.”

“A Fluid-Bag is a flexible IBC for storage and

transportation of industrial volumes of liquids

and semi-solids. The plastic foils in contact with

a liquid can be altered, according to the type

and characteristics of a particular product. The

container is a sealed system avoiding air ingress

during filling or discharge, maximising product

protection against, amongst other things,

moisture, UV, air born bacteria and

contaminants. The Fluid-Bag ensures

consistency and cleanliness of product, reducing

down time and maintenance, especially

important where machinery is operated in harsh

mining environments.

South African based Engen Petroleum has

partnered with Fluid-Bag and been at the

forefront of introducing the systems in sub

Saharan Africa mining operations. Mining

companies and equipment operators have come

to value and take advantage of the benefits of

contaminant free greases and lubricants. Using

the flexibility of the Fluid-Bag, lubricant residues

are reduced to a minimum, and equally with

grease products as low as 0.5% when

discharged in conjunction with Fluid-Bag

handling equipment.

Fluid-Bags are today widely

transported by rail, by sea container and

have proven themselves for long and

short haulage under extreme conditions.

They weigh on average 70% less in

gross transport mass compared to most

drums. One is the equivalent of four

drums, reducing handling and disposal.

Important from an environmental perspective,

all components making up a Fluid-Bag are fully

recyclable. Handling of waste oil is increasingly

an environmental hazard especially in the early

phases of a mining operation. Some sites use

emptied Fluid-Bags for temporary waste storage

pending disposal via the correct authorities.

Used bags are foldable which allows scanning in

high security areas such as diamond mines.

The container is manufactured in accordance

with stringent standards – strength, inflation

and other tests set by the Swedish Test

Authority. Uniquely each and every Fluid-Bag is

pressure tested before delivery. Resistance of a

filled container to external influences is

extremely high – absorbing high levels of impact

if dropped or for example taking a direct hit from

a fork lift.

The Danish company, Fractum, offers, it says,

“a cost-effective solution for breaking oversize

rock. Its core product, the Fractum breaker, is

the biggest hammer in a world, capable of

breaking hard rock material, such as granite or

basalt boulders of more than 150 t.”

As the technology uses gravity to generate its

kinetic energy, the machine provides a highly

cost-competitive method of secondary breaking.

Essentially, the breaker consists of a steel tube,

700 mm in diameter and 8.25 m tall. Inside this

there is a steel-tipped weighted hammer and a

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coupler. In operation, the coupler is lowered

down the tube to engage with a fitting on the

upper surface of the hammer. A cable attached

to the coupler raises it up the tube, in turn lifting

the hammer. The bottom of the tube is placed on

top of the material to be broken and the

hammer is released. Gravity accelerates the

hammer downwards to break the target

material. The cycle takes on average 10 seconds.

The gravity-impact breaker needs to be

mounted on a

conventional

excavator of at least

40 t deadweight.

Having the breaker

mounted on an

excavator means that

the Fractum can be

rapidly deployed to

various areas of a

mine to carry out a

range of breaking

work. However, the

excavator is purely a

means of transport,

and the demands on

this machine are not

onerous. For this reason, a second-hand

excavator could be put to good use in this

application. While the tool is in use, the

excavator engine needs to operate at maximum

of a fast idle. Since the engine can operate

under low load the noise it generates is greatly

reduced.

The gravity-impact breaker offers a faster

solution to the problem of secondary blasting,

as it eliminates the need for time-consuming

drilling and charging of blastholes. It is also

safer than using other breakers or explosives.

The breaker hammer can be directed with great

accuracy and flying fragments from the impact

are safely contained within the breaker tube.

Fractum says “mechanically-complex

hydraulic breakers create both noise and, with

the need for repeated impacts, considerable

amount of dust. Flying fragments of material can

pose a risk to people and equipment in the

immediate vicinity.

“As a gravity-impact breaker uses far fewer

strikes than a hydraulic breaker to break the

same amount of material, there is less noise.

With smaller rocks, the gravity-impact breaker

can match the performance of a hydraulic

breaker. However, with larger rocks, the gravity-

impact breaker, with its greater impacts, easily

outpaces the performance of a hydraulic

breaker.

“When hydraulic breakers make a strike,

which encounters no resistance, these machines

can sustain damage. Mis-strikes pose no threat

to the Danish breaker. In fact, a major advantage

of the gravity-impact breaker is that it imposes

minimum strain on the excavator on which it is

mounted. The impacts transmitted from

hydraulic breakers, on the other hand, are

transmitted back to their carrier excavators, a

strain that shortens the lives of carriers

substantially.

“With fewer moving parts than a hydraulic

breaker, gravity-impact breakers offer longer

operating lives at a greatly reduced cost,”

Fractum claims. In Europe, it has been shown

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that, if all costs are included, conventional

secondary breaking costs between €3.00 and

€7.00 per tonne. An efficient gravity-impact

breaker drops these costs to between €1.00 and

€1.50/t.”

Visitors to MINExpo were able to see what is

claimed to be “the world’s most powerful direct

drive.” The new Hägglunds CBM hydraulic motor

from Bosch Rexroth creates powerful

opportunities. Taking over from the tried-and-

true Hägglunds

Marathon motor, the Hägglunds CBM packs

50% more torque into a motor that is smaller

and up to 50% lighter than its predecessor.

“That gives it the world’s highest torque-to

weight ratio,” the company says.

For customers, the new motor opens up new

possibilities. The Hägglunds CBM not only

handles heavier workloads, but also takes up

less space and places less weight on the driven

shaft. This means that customer machines, and

in some cases the facilities that house them, can

be smaller, lighter and simpler. The motor’s

reduced installation requirements, combined

with the higher productivity it allows, can mean

lower overall investments and increased long-

term revenue. Added to this are the unique

operating advantages of a hydraulic direct drive:

full torque from zero speed, protection from

shock loads and four-quadrant operation.

The motor was developed in direct response

to customer requests. Greater power is

increasingly needed in many industries, and it is

a prerequisite for a number of new applications.

Based on the Hägglunds CB platform, the

Hägglunds CBM has internal advances that

allow it to supply 6000 Nm/bar of specific

torque. “The Hägglunds CBM satisfies the

toughest new demands on the market,” says

Lars Andrén, one of the key members of the

Hägglunds CBM development team.

“With its introduction, we can

provide the unique

advantages of a hydraulic

direct drive to a broader

range of applications than

ever before.”

Tested to meet high

expectations In replacing

a successful and trusted

motor like the Hägglunds

Marathon, Bosch Rexroth has

left nothing to chance. Many years

of R&D have gone into the Hägglunds CBM, as

well numerous hours of testing to verify

performance and quality. In fact, the Hägglunds

CBM is reported to have undergone more lab

testing than any other Hägglunds motor.

For those looking to upgrade from the

Hägglunds Marathon, direct retrofit kits are

available. These make exchanging the motor

both quick and simple in existing machines. All

customers, however, will benefit from the ease

of installing the Hägglunds CBM, since it has

splines that simplify attachment to the driven

shaft. (Shrinkdisc adapters are also available.)

At MINExpo last month, Komatsu KVX LLC

showed an 11 m3 rock loading bucket for 100 t

wheel loaders. It has supplied similar buckets in

North America, South America, Africa, Russia,

Europe and Australia. “Western Australia is a

very exciting region, and our market share here

is steadily increasing,” explains Managing

Director Carsten Bo Andersen.

KVX has gained worldwide

recognition for its highly wear

resistant bolt-on ground

engaging tool system for earth

moving machines and has

supplied the world market for

decades. “The foundation for KVX’s

strong position today is working

close with retailers, contractors, quarries

and mines. There has always been a tight

cooperation between KVX and some of our

customers in product development and testing

in order for us to help making their operation

profitable,” says Andersen.

Kopar’s particular expertise is in non-ferrous

smelters but its range of equipment also covers

many other applications and it has numerous

references in mining and metallurgy operations

worldwide. Kopar designs and manufactures

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rotary and steam dryers, converters, anode

furnaces, granulation plants, bucket elevators,

mechanical and pneumatic conveying systems,

and rotor and roller crushers. Kopar also offers

engineering and other services including pilot

tests, project management, erection, start-up,

training, modernisation, and spare and wear

parts.

A recent reference was the supply and

erection of a nickel slag handling system to

Boliden Harjavalta’s smelter, including a bucket

elevator, the respective elevator tower and a

new belt conveyor. Kopar also removed the old

equipment.

The bucket elevator is used for the

dewatering of nickel slag. It has a nominal

capacity to lift 110 m³/h of wet slag, about 20%

moisture. The length of the elevator is 14 m with

forged and hardened double drag chains in 216

mm pitches. The length of the belt conveyor is

36 m with a capacity to handle the same amount

of slag as the bucket elevator. In fact, the bucket

elevator replaced two older and shorter

elevators.

This recent delivery in May and June, 2012 did

not interfere with production, according to

Raimo Jortikka, Project Manager of Boliden

Harjavalta, as it was done during the annual

service period. The bucket elevator installation

took two weeks and the length of the service

period was five weeks.

In the past Kopar has

delivered various pieces of

equipment to Boliden

Harjavalta, including a

Peirce Smith converter for a

copper smelting line and

pneumatic conveying

systems for copper

concentrate.

Metso’s Mining and

Construction segment is

purchasing technology and know-how from

Jacobs Engineering Group for its Straight Grate

iron ore pelletising technology. Key Jacobs

technical staff related to the technology will

become Metso employees as part of the deal.

Iron ore pelletising is used to produce pellets

from concentrated iron ore for feed to blast

furnace and direct reduced iron plants. Metso

NORDIC FOCUS

The Kopar bucket elevator being lifted inHarjavalta for installation

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Metso Minerals recently launched thecomprehensive range of Opti-flo® screens andfeeders which the company says will offerreduced delivery times. Less components, leadto better serviceability and there is to beimproved availability of spare parts. Theseproducts are backed by the engineeringknowhow and experience of a worldwide screendesign team. The Opti-flo range consists ofbanana, inclined and horizontal screens as wellas feeders and grizzlies. It includes linear,circular and elliptical motion screens to suitmost applications

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anticipates continued growth in this market as

more beneficiation and pelletising plants are

needed to maximise the output from lower

grade orebodies

Metso currently offers the Grate Kiln iron ore

pelletising system. With the purchase of the

Straight Grate technology from Jacobs, Metso

says it will become “the only supplier in the

world of both systems. Metso will be investing

in the on-going technical development of both

technologies.”

Metso and Jacobs have worked collaboratively

in the past with Metso supplying equipment for

Jacobs Straight Grate systems. The companies

anticipate that there will be the opportunity for

cooperation in the future in other areas.

Nokian Heavy Tyres is introducing the new

Nokian Mine King L-5S underground loader tyre

family which will replace the current Nokian

Mine L-5S products. Mine King’s are upgraded

to withstand heavier loads and give better

performance for the roughest conditions

underground. Excellent durability with steady

and robust carcass enables safe and fast

operation with great reliability and productivity.

The size range is from 12.00-20 up to 26.5-25

and will advance to 29.5-29 in the beginning of

2013.

These new tyres feature more layers to

enhance tyre safety in demanding applications.

The new carcass and bead materials allows an

increase of the

maximum inflation

pressure up to 8

bar (on 12.00-20

tyres up to 10 bar).

The higher load

capacity gives the

possibility of using

the tyres on more

efficient and

heavier machines.

In April 2010

Normet acquired

40% of the

construction

chemicals

manufacturer and

supplier, TAM International (TAM), to form a

global partnership. “Through careful, strategic

stewardship, TAM has since grown rapidly and

significantly in the underground mining sector,”

Normet says.

Based on this growth success, In June Normet

acquired the remaining 60% of TAM making it

now a wholly owned subsidiary of the Normet

Group. “Our 40% ownership in TAM was a

logical step forward in Normet’s quest to offer

the industry not only specialist equipment for

tough jobs, but a total solution offering that our

customers see real value in. This has already

proved successful in the areas of the world

where we have offered such solutions but now

with the complete acquisition of TAM, we can

really accelerate our ability to provide both new

and existing Normet customers around the

world entire process solutions that lowers their

risk and achieves a positive project outcome”,

says Aaro Cantell, Chairman of Normet Group.

“During the last two years of the

partnership, TAM has grown significantly and

now that it is fully integrated into Normet's own

construction chemical business line, it makes us

one of the leading specialist suppliers of

process solutions to the global underground

mining and tunnelling sector”, confirms Tom

Melbye, President of Normet Group and

Managing Director of Normet International.

“TAM’s experienced and competent personnel

and resources will only further strengthen

Normet's ability to be a reliable, long-term

partner for our customers in all different types

of projects and conditions including

underground, geotechnical engineering and

general construction projects. Our team is very

excited about the future!”

Moving forward, all TAM companies

worldwide will eventually operate under the

Normet company name, and TAM will be

retained as the product brand name for

construction chemical products.

Outotec recently signed a contract for a

turnkey project with Mexicana de Cobre to

There is a tread depthindicator on the newNokian Mine King L-5S underground tyresfor easy checking ofthe remaining tread

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modernise La Caridad flash smelter at Sonora,

Mexico. The investment of this project is around

€30 million.

La Caridad copper smelter, built in the 1980s,

uses Outotec® Flash Smelting technology. The

scope of modernisation work includes refractory

demolition and equipment deliveries such as a

modern Outotec proprietary feeding system,

concentrate burner, furnace cooling system and

process control. Outotec will provide project and

construction management, commissioning and

start up supervision services. Once completed

during the last quarter of 2013 the modernised

smelter will be able to reach a higher production

capacity and energy-efficient metals recovery

without increasing emission levels.

"Mexicana de Cobre was convinced by

Outotec's capabilities regarding the renowned

Flash Smelting technology and our shutdown

expertise. We believe that with this

combination, supported by our local

knowledge and global resource

network, there are a various

opportunities for sustainable

smelter renovation and

modernisation jobs

around the world",

explains Outotec CEO

Pertti Korhonen.

Outotec has

expanded its grinding

mill product family

adding the Outotec

HIGmill™ (High Intensity

Grinding Mill) for fine, ultra-

fine and regrind milling

applications. This offers a

great advantage for

concentrators that are aiming

for improved grinding

efficiency or require

regrinding in their process.

HIGmill technology has

been developed and utilised

for more than 30 years. Today

there are more than 260

installed units around the world, with installed

mill power up to 5,000 kW. Outotec says

“HIGmills are so far the largest units in the

market place.”

Outotec brings this technology to the

minerals processing industry as more complex,

fine grained orebodies around the world

become economically viable. “Combining fine

grinding technology with flotation expertise and

particle size monitoring technology, Outotec

now provides a complete integrated offering for

new projects and value adding optimisation

solutions for existing installations.”

The HIGmill has the following advantages,

Outotec says:

■ High energy efficiency

■ High energy intensity and vertical orientation

■ Small footprint

■ Low wear rates and easy maintenance

■ Low operating cost, high availability

■ Large installed power base up to 5,000 kW

■ Open circuit: no classifiers, simpler process

All units are supplied with a variable speed

drive system which provides plant operators

optimum process and particle size control.

Robit Rocktools’ very specialised offering

consists of top hammer rock drilling tools and

overburden tools. Headquartered in Finland,

Robit is also present in more than 90 countries,

including a strong presence in Asia through its

manufacturing unit and distribution center in

South Korea YP Robit. Robit says it “will expand

its operations to 100 countries.”

Robit has always had as the priority to serve

locally its customers. In order to pursue this

philosophy, it says, “skilled personnel have

been hired and are now located closer to the

mining region. Simultaneously Robit is

developing special bit series to reinforce the

performance of its products in the demanding

northern conditions and support the mines to

take their drilling costs down.”

Ruukki is one of the world’s leading

producers of high-strength and wear-resistant

steel grades, including also engineering and

construction solutions, with operations in some

30 countries. Net sales in 2011 totalled €2.8

billion. Founded in 1961, Ruukki is a Finnish-

based steel producer with annual production

over 2 Mt of steel from its integrated steel mill

in Finland.

The range of special steel products includes

Ruukki Raex wear-resistant steels and Ruukki

Optim high-strength structural steels, with a full

offering of steel products extending from

standard to special-steel products. Ruukki’s

steel service centres also offer ready-bent, laser-

welded components, even processed into ready-

made parts or products. The company

NORDIC FOCUS


tel. +358 207 430 660, fax +358 207 430 661, www.oykatiab.com. +358 207 430 elt .ww660, fax +358 207 430 661, w om.ctiabayk.o

http://www.oykatiab.com

manufactures also heavy welded components

such as frames and booms as well as ready-to-

assemble operator cabins for mobile machines.

Ruukki works with its customers to help them

develop optimal end-products and to design

new applications for steel. Special steel

products translate into more value using less

material in customer applications. Special steel

customers include manufacturers

of mining equipment.

Ruukki is committed to continuously

improving the energy efficiency of its steel

production. Strong R&D capability enables

Ruukki to develop high quality products in

response to the market and various industries’

needs. The company ranks among most energy-

efficient in the world in iron-making and uses

nearly the minimum amount of coal raw

materials possible using current technology.

Some information on Sandvik’s new products

for MINExpo was given in our MINExpo review,

and more will be covered in detail next month.

To improve customer service, the group recently

entered into a five-year strategic agreement, to

a value of SEK2 billion, with the IT and

consulting company IBM and will outsource

parts of the IT infrastructure services. This is an

important step towards strengthening the

internal business solution for Sandvik IT and

also a vital part in its ambition to be a globally

integrated company.

The services in scope for this agreement are

'data centre services' and 'workplace'. The

former includes the operation of all server

platforms including hardware, application

platform software and facilities where servers

are placed. 'Workplace' includes all services to

manage Office PCs as well as messaging,

collaboration, standard applications and second

line user support. All tasks within 'workplace'

and 'data centre services' will be performed by

IBM.

Sandvik says it aims “to become a more fast-

paced, global and customer focused company

with greater synergies within IT and other

selected areas. This agreement will enable

scalability and flexibility in cost, resources and

competence for Sandvik. In the long term

perspective this will provide an increased cost

efficiency and quality of IT services and also

secure access to the right skills and

competence.”

H20 Maskinentreprenad owner Ulf Eriksson

recently took delivery of the very first Scania R

730 five-axle mining truck in Europe. The vehicle

will be primarily used in a mine in Kiruna,

Sweden, to haul tailings to a new tailings

management facility (TMF) after separation in

the dressing plant.

“The fact that I was bold enough to invest in a

truck for use in mining transport is probably

linked to the fact that I’m prepared to try out

new ideas to improve cost-efficiency in fuel

consumption,” says Eriksson. “Also, a truck that

only has a fraction of the emissions of

traditional mining trucks offers major

environmental benefits.”

Scania says the cost benefits that the five-

axle truck possesses are evident. “Tipper trucks

can admittedly be loaded with greater volumes

but they cost double the amount, use between a

quarter to a third more fuel and make for higher

insurance premiums and service costs.”

Eriksson estimates that he will save a great

deal of money each year on fuel alone.

“If everything goes to plan, the truck will pay

for itself within three years as I estimate that it’ll

be running for 20,000 hours over the space of

those three years,” he says.

The R 730 is untested in Europe, but in Brazil

around 150 vehicles are in use and two similar

vehicles with large tipper bodies are currently

being tried out in Indonesia. Another vehicle has

already been ordered for Gällivare, Sweden.

Before being delivered to Ulf Eriksson, the

vehicle was tested at the Gällivare mine.

“It worked extremely well, and we can see a

significant saving in fuel per tonne of material

transported,” says Daniel Karlsson, Regional

Manager at Scania Mining. “By letting people

put this vehicle through its paces, we believe

we’ll be able to sell more of them, both in

Sweden and around the world.”

The five-axle R 730 won’t replace the big

mining trucks, but it’s well-suited to

transporting medium-sized loads, especially on

slightly longer routes. Drivers can look forward

to a more comfortable working environment,

with the latest in cabin comfort.

The Swedish truck distributor Scania-

BilarSverige has started planning for its mining

projects in Sweden by setting up a special

warehouse in Södertälje that will guarantee

spare parts within 24 hours. “I’ll be in touch

with Ulf Eriksson at least once a week to see

how things are going,” says sales representative

Lars Bergvall at Scania dealer Müllers in Kiruna.

“We’re convinced this is going to be success and

will be keeping a close eye on the vehicle,” he

says.

NORDIC FOCUS


Scania five-axle R 730 truck at Kiruna, alsoshown in article lead picture


NORDIC FOCUS

Sleipner is the manufacturer of specialty

equipment to move tracked excavators in open-

pit mines in a cost-efficient and effective way.

The system is based on a pair of heavy tyres and

the assistance of a hauling truck that can haul

the excavator above the ground fast and with no

wear to the machine’s tracks and undercarriage.

The Sleipner system has extended its range with

models to haul up to 550 t excavators.

The system is based on two pairs of axles and

heavy tyres with ramps. With the aid of the tyres

and the haul truck the excavator is easily moved

to the desired location. The move is

accomplished much quicker, with up to an 80%

reduction in the time to move machines.

There are further advantages, the prime one

being a considerable reduction to the wear of

the machine, since moving the machine off the

ground eliminates wear to the tracks and

undercarriage. With Sleipner, the lifetime of the

undercarriage is easily doubled or even tripled,

it claims. The system also makes the

maintenance and service easier and more cost-

efficient, since the machine can be moved fast

to the workshop avoiding servicing in the pit,

exposed to the elements.

Sleipner opened a new and modern facility in

Finland in 2011. There are currently 11 models in

the manufacturing program starting from E30 to

E550, the number indicating the weight of

excavator to be hauled. Most models also

incorporate different ramp sizes to fit almost all

existing excavator brands and models.

Tamtron Group has developed a robust and

reliable truck scale with various ways to transfer

data wirelessly and online. The scale consists of

two axle load cells replacing the rear pins, a

pressure transducer measuring the pressure in

the piston cylinder and an advanced display

instrument, designed for onboard use. The use

of both types of transducers ensures that the

weight result is correct in every position of the

platform. Weighing takes place simply by lifting

the platform. Inbuilt angle compensation means

the weighing is also accurate on uneven ground.

The DV scales can be installed for any off-road

truck, including underground haul trucks. The

scale is widely used on all truck models around

the world.

When the weighing is accomplished onboard

there is no need to take the load to a weigh-

bridge, which saves time. Export manager Kai

Ruuskanen says that with its DV scales, “you

can load impressive amounts of materials and

In total nine Sleipner sets of various sizes weredelivered to the Tuhup coal mine located in theprovince of Central Kalimantan in the south ofthe island of Borneo in Indonesia. The mine ismanaged by PT Asmin Koalindo Tuhup andproduces high-quality coking coal currently atthe rate of 5 Mt/y. The photo shows a KomatsuPC2000 excavator being hauled using aSleipner E190 and a Komatsu HD785 miningtruck

Tamtron scales are equipped with a large, cleardisplay – in 2012 the full-colour touch screenwas launched. Both the display and keyboardare illuminated, enabling round-the-clock use.The scale guides the user to work effectively byusing messages and audio signals. With propercharacter sizing the display is very convenientto read

http://www.devico.com

still get very accurate weighing results. The

completed weighings are stored in the large

memory from where one can keep accurate

record of the material type and amount loaded

and location of the material. Tamtron DV scale

helps to avoid overloads which leads to more

efficient utilisation of the fleet and less need for

service.”

There are many DV scale models to choose

from. Even the basic models have many unique

standard features to meet customer

requirements. The scales can easily be

upgraded to more advanced data transfer

versions when the operation changes or more

online data is required. The most popular

wireless data transfer option is 300i with GPRS

data transfer through internet. With this model

data is accessed online wherever an internet

connection can be made. The system can be

supplemented with an advanced “i-Stock”

system in which one online is able to display the

material balance in various locations. All models

can be equipped with reliable thermal tape or

slip printers.

The Vacon® NXP has been updated to further

improve its performance, robustness, reliability

and market appeal. It is Vacon’s top of the range

product for all high power and high performance

products. The update involves improvements to

the complete product range, both the air-cooled

and liquid-cooled units. One of the most

significant concerns the control circuit boards,

which have been significantly redesigned and

uniformly varnished. Certain critical components

have been replaced in order to increase their

temperature sustainability. However, the range

of functionality and compatibility of the circuit

boards remain unchanged.

Varnished cards and option boards - which

are provided as standard in the power modules

above 72 A - improve protection against dust

and moisture. Performance and durability are

also enhanced by improved cooling channels for

optimal cooling and experience-based

optimisation of protection limits. In the air-

cooled NXP, new fans improve the reliability of

the drive, thus ensuring a longer life. Thanks to

the new cooling concept, fan efficiency has been

improved by more than 50%.

In the liquid-cooled high-power modules, new

options, such as an integrated brake chopper,

have been implemented to minimise cabinet

size and cost. Nickel plated heat sinks have

been developed to improve resistance against

aggressive liquids and corrosion.

The processor in the control card has also

been changed, boosting calculation power by

15%. This benefits especially OEM customers

who make their own software for applications.

“The Vacon NXP is a high-performance

product range, and with this update we have

further improved its performance, robustness

and reliability,” says Heikki Hiltunen, Executive

Vice President, Market Operations. “As a

dedicated AC drives company, we are committed

to pioneering trends in product design and

provide innovative solutions for demanding

industry applications and high power ranges.”

The Vacon Enhanced NXP is compatible with

the earlier versions of the NXP.

Fuel economy and

automation control of

various processes

support the use of

variable speed AC

drives in the highly

competitive mining

and minerals

processing sector.

Running AC motors

with variable speed

drives instead of

constant or fixed

speeds can save up to

50% in energy

consumption. Vacon

has one of the most

extensive product

portfolios in the

market and has

delivered thousands

of air- and liquid-

cooled AC drives to

customers across the

world.

Liquid-cooled

Vacon AC drives are

well suited for

locations where air

cooling would be

difficult, expensive or

impractical, or where space for installing the

drives is at a premium. Vacon’s liquid-cooled

units, which use normal drinking water as

coolant, have a very compact construction and a

low noise level since they require no large fans,

additional air conditioning or filtered ventilation

systems. A low noise level also means a better

working environment. Liquid cooling also

enables the use of cabinets with a high

protection class.

An additional benefit of these AC drives is

their heat loss transportation. The liquid-cooled

drives make it possible to transport heat losses

outside the electrical room and avoid the need

to use the surrounding air to ventilate the room

and cabinets.

Veekmas manufactures low-profile motor

graders for road maintenance in underground

hard rock mines worldwide.Their design and

product development is based on long

experience of manufacturing and developing

advanced motor graders with high level

ergonomics and operator friendliness. They are

also manufactured “with attention to high

performance and low operating costs.”

Pyhäsalmi in Finland, one of the mines

International Mining visits regularly (IM, April

2010, pp10-18) because it has a great reputation

around the world for underground mining

innovation and great use of technology, took

delivery of a Veekmas FG 7 C earlier this year

(pictured on the contents page of this issue).

This copper-zinc-pyrite mine has dozens of

kilometres of underground roads. “Veekmas FG

7 C is an operator friendly and strong enough

motor grader that has small turning radii”, says

Mine Manager Jouni Niemi. “Veekmas UG motor

graders have been originally designed for

underground mines, so they have small

dimensions and they turn fluently also in narrow

tunnels”, he continues. The FG 7 C is now the

only motor grader in the mine as the previous

Veekmas motor grader was 16 years old and it

was time to replace it. The mine did not even

think about considering another manufacturer.

“Veekmas is a well-known manufacturer and we

have good experience on Veekmas motor

graders”, says Niemi.

The main role of a motor grader in an

underground mine is for road maintenance. It is

essential that all underground roads are in good

condition because it improves efficiency,

enables traffic flow and lowers maintenance

costs of other vehicles. See also the Veekmas

section in September’s article on mining tyres

(p149).

The FG 7 C, like the one bought by Pyhäsalmi

is 2,460 mm high, has a maximum outside

turning radius of 4,450 mm without a front

blade, weighs 9.8 t and features a 90 kW

engine. The company has now added a new

model to the product line, the FG 3 C, which is

1,400 mm high, has a maximum outside turning

radius of 4,550 mm without a front blade,

weighs 8,700 kg and is powered by a 75 kW

engine.

In 2011, Volvo Penta was one of the first

diesel engine manufacturers to receive stage 3B

and Tier 4i certificates for its entire engine line-

up. For many years these engines have been

successfully proven for use in the demanding

underground mining segment. Now, the same

engines are also certified by MSHA and

CANMET.

Volvo Penta has received Mine Safety and

Health Administration (MSHA) as well as

CANMET-MMSL certification for its 13L interim

Tier 4 diesel engines. The 13L is the first engine

to receive the certification and there is more to

come.

The 257-405 kW, TAD1360/61/

62/63/64/65VE-series of diesel engines offers

NORDIC FOCUS

A major update hasbeen carried out onthe high-power, high-performance VaconNXP, which willmaintain its strongposition in Vacon’sportfolio in the highlycompetitive AC drivesmarket

NORDIC FOCUS


ventilation rates that are among the lowest in

the industry for the given power category, Volvo

Penta says. The ventilation rate is around 0.0189

m3/s/kW, which is considerably lower than

many other diesel engines used in mines today.

Looking forward, in 2014, manufacturers of

off-road original equipment will face the much

stricter Tier 4 Final/Stage 4 environmental

standards. This means a massive 80% reduction

of the NOx – from 2.0 g/kWh to 0.4 g/kWh.

Volvo Penta says it will be keeping it

simple for OEMs in regard to the re-

design of machines for installing

new engines and after-treatment

systems. Its range of engines

compliant with Tier 4 Interim/Stage 3B

is based on the Selective Catalytic

Reduction (SCR) technology. For

2014, it will meet the much more

stringent Tier 4 Final standards

using the same well-tested and

proven technology. A further

development of the SCR catalyst has

improved the NOx conversion to levels unheard

of just a few years ago. Adding a “light” EGR

system to the engines provides further emission

reduction and will at the same time help keep

the SCR catalyst operating at an optimal

temperature.

The innovative EGR system on the engines is

lightly cooled or not cooled at all. This serves

two purposes: First of all, it will not add extra

cooling requirements to the existing cooling

system. Secondly, it will not be subject to

exhaust gas condensation and thus the

potential

corrosion that can lead to

downtime.

By avoiding a costly Diesel Oxidation

Catalyst (DOC), installation is greatly simplified.

“This is probably the best EGR system in the

world”, says David Hanngren, Manager Product

Planning Industrial at Volvo Penta, and adds:

“With our new Tier 4 Final engine range, we will

also meet our customers’ primary objectives: no

re-generation, limited installation challenges,

continuous optimised fuel consumption and low

operating costs. With as few and as simple

changes as possible, we aim to make our

customers’ job as easy as possible.”

The SCR system is based

on high-efficiency

combustion

which reduces

the fuel

consumption

and results in

extremely low

levels of particulate

matter (PM), but also in

high NOx levels. Here,

the smartness of the

system is revealed: the

exhaust NOx is

converted into harmless

nitrogen gas and water

vapour. The SCR system

automatically injects up to 5%

AdBlue®, a diesel exhaust fluid,

to the exhaust gases. The gases are

then passed through a catalytic converter before

emission to the environment. The extremely low

levels of particulate matter in the emissions

also make exhaust gas filtration (DPF)

unnecessary. IM

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