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Grain & Feed Milling Technology is published six times a year by Perendale Publishers Ltd of the United Kingdom.All data is published in good faith, based on information received, and while every care is taken to prevent inaccuracies, the publishers accept no liability for any errors or omissions or for the consequences of action taken on the basis of information published. ©Copyright 2010 Perendale Publishers Ltd. All rights reserved. No part of this publication may be reproduced in any form or by any means without prior permission of the copyright owner. Printed by Perendale Publishers Ltd. ISSN: 1466-3872

Digital Re-print - March | April 2012 Grinding by a proven concept makes your choice simple

www.gfmt.co.uk

Together with mixing and pelleting, grinding is one of the important process-

es when producing animal feed.

Traditionally, hammer mills are used in the feed industry for grinding raw materials, which is mainly caused by the relatively sim-ple construction and high variation in particle reduction compared to other techniques

used at roller mills and crackers.Roller mills and crackers showed better

results when it comes to energy consump-tion, but the new designed mills feature adjustable pre-breaker plates, variable speed drives and automatic screen change systems.

This results in an energy saving which brings the hammer mill again in a favoured position, certainly when taking in considera-tion the relatively high costs for wearing parts

on roller mills and crackers. Given the fact that a ham-mer mill also allows grind-ing of mixed products, it becomes clear that hammer mills still are the majority.

Wynveen International BV has a rich tradition in manufactur-

ing machines and equipment for the animal feed industry, petfood industry and fish industry.

Recently the company has moved into its new premises, which means a doubling of the office and production floor compared to the old building. With this new office Wynveen International BV is prepared of the future and has made the logical next step to meet the growth targets it is aiming for. With its new website, introduced during the opening of the new building, one can see in a glance what capabilities can be offered.

Besides the design and delivery of complete turnkey feed mills, Wynveen International BV is manufacturing the main equipment like hammer mills, mixers, coater and sifters and conveying equipment.

Wynveen International BV is manufactur-ing hammer mills in a wide range.

The features of the of hammer mills that can be delivered are:• Big diameter 1200mm - 1500rpm• Diameter 650mm - 3000rpm• Capacities from 2t/h up to 60t/h• Frequency controlled drives• Manual or automatic screen exchange• With or without adjustable breaker plates

Table 1:

Type Capacity t/h* Diameter Chamber

Length Chamber RPM.

450-150 1-2 450 150 3000

650-275 2-3 650 275 3000

650-375 3-5 650 275 3000

650-550 7-12 650 550 3000

670-750 15-20 650 750 3000

670-1150 20--30 650 1150 3000

GHM-750 20-35 1200 750 1500

GHM-1000 30-50 1200 1000 1500

GHM-1250 45-60 1200 1250 1500

*= depending on raw materials

Grinding by a proven concept makes your choice simple

by Willem de Vaan, General Director, Wynveen International BV, The Netherlands

Grain&feed millinG technoloGy14 | march - april 2012

FEATURE

• Two directions of rotation possible• Motor capacities up to 400kW• Open rotor design• Temperature control on main bearings

and chamber• Feeder with magnet and stone trap• Ergonomic design

Already, five years ago, the Wynveen hammer mill underwent a complete makeo-ver and there was the idea to develop a hammer mill that will be prepared for the future and can deal with the challenges of the future. This means minimal energy con-sumption and the possibility to answer to the

need of the various applications required in nowadays-feed mills.

Most animal feed mills are looking for a grinding concept that can produce the par-ticle size that fits with the specific required coarseness of ingredients needed for the feed to produce.

The latest version of the Wynveen hammer mills type GHM has a grinding chamber diameter of 1200mm, which gives at a speed of only 1500rpm a hammer tip speed at the ideal level of approximately 90m/seconds. The length of the chamber can vary from 750 to 1250mm, depending on the required capacity. The low speed gives a lower noise level, less wear and tear and lower bearing load compared to a 3000-rpm hammer mill.

To suit the various demands in feed mill capacities, Wynveen International BV can deliver hammer mills that can deal with dif-ferent capacities from two tones/hour up to

60 tones/hour. For the smaller capacities the 3000-rpm versions are still used.

In the enclosed table you will find the various possibilities. By introducing frequency control on the motor, it became possible to grind ideal structures and particle size. In fact you can create a new screen set-up but still using the same screen perforation. When using a high speed you are able to create fine grinding, while with a lower speed a coarser grinding is achieved.

Frequent changing

To answer the grow-ing need for producing a great number of recipes, the screens need to be changed frequently, for which reason Wynveen has designed the GHM version with an optional automatic screen change system. This gives more possibilities to grind on vari-ous perfora-tions without the need to stop the motor during production and loose a lot of pro-duction time. Wynveen has chosen to make use of

the ergonomic design already available at the hammer mills with manual screen exchange, which means a horizontal movable screen cassette in which 4 screens (so also four dif-ferent perforations selectable) are mounted.

The big advantage versus vertical screen exchange is the space needed.

Often an upper hopper is positioned above the hammer mill, which reduces the possibilities for vertical screen exchange. To avoid dust and waste of product during

Grain&feed millinG technoloGy march - april 2012 | 15

Your partner in technology, equipment and plants for animal- and aqua feed and petfood.

Wynveen International b.v.P.O. Box 386666 ZG HeterenThe Netherlands

Tel: +31 (0)26 - 479 06 99Fax: +31 (0)26 - 479 06 98info@wynveen.comwww.wynveen.com

V A C U U M C O A T E R

1 Magnet2 Airinlet3 Stonetrap4 Materialdirectionflap5 Prebrakingplates6 Temperaturesensor7 Screen8 Rotormetbeaters

FEATURE

News March-April2012 NEWS

As demand for non-GMO products worldwide increases, a new not-

for-profit organisation has been launched in The Netherlands to support the European food and feed industries in sourcing sustainably produced, non-genetically modified grains, cereals and derivatives and in particular soy.

Backed by industry stakeholders from both Europe and South America, The ProTerra Foundation claims that the growth in genetically modified crops is not only a risk to food safety and food security, but causes a devastating impact on the welfare and lives of farmers and rural communities in countries such as Brazil and Argentina, from where millions of tonnes of soymeal, soybeans and soy oil are imported into the EU every year. The Foundation is dedicated to providing the agricultural and food industries with the tools that they need to achieve improved sustainability performance. As a result , The ProTerra

Foundation has recently become the new custodian of the highly successful ProTerra Certification Standard against which non-GM soy producers and supply chain suppliers have been certifying millions of tonnes of soy for more than six years. The program, originally created by Cert ID, has already significantly contributed to improving the sustainability of the soy supply chain. It is anticipated that placing the ProTerra certification program under the governance of an independent non-profit foundation, managed through a broad multi-stakeholder consultation process, will amplify its application and effectiveness as well further enhance its standing as an independent quality mark.ProTerra certification requires a strict non-GMO limit of less than 0.1 percent adventitious EU authorised GM contamination, strong traceability, PCR testing at ‘critical’ control points, as well as protection of the rights of workers and indigenous people

and preservation of the Amazon and other high conservation value areas (HCVAs). The strength of ProTerra Certification helps mitigate brands’ exposure and liability related to GMOs and the full range of social and environmental issues. It is anticipated that EU retailers and brands will use the new ProTerra certification Trustmark to identify on-pack to consumers products produced without GMOs and according to advanced sustainability practices.

Effect upon environment shocking“The truth about farming genetically modified soy capable of withstanding being drenched in toxic pesticides and their effect upon the environment and soil fertility is shocking,” says Augusto Freire, Managing Director of Cert ID Brazil. “Understandably EU consumers are therefore sensitive about the impact of food production on people and the planet, and VERY

sensitive about GM in their foods.” Richard Werran, Managing Director of Cert ID Europe adds, “The aim of The ProTerra Foundation is to support the feed and food industries in supplying non-GM soy with improved sustainability performance. “A rigorous cer ti f icat ion programme such as ProTerra which addresses every aspect of the crop’s journey, from farm to fork can contribute significantly to this goal.”As part of its educational agenda, the ProTerra Foundation is hosting a conference on April 24, 2012 at The Natural History Museum London. The conference will bring together participants from all stages of the soy supply chain, from South America, Asia and Europe including retailers, food manufacturers, feed suppliers, farmers and other stakeholders to explore in-depth the sustainability of the soy supply chain.

More inforMation: The ProTerra Foundation

Website: www.proterrafoundation.org.

Sustainably farmed non-GM crops on the agenda of new industry body

Grain&feed millinG technoloGy march - april 2012 | 7

VIGAN Engineering s.a. • Rue de l’Industrie, 16 • B-1400 Nivelles (Belgium)Phone : +32 67 89 50 41 • Fax : +32 67 89 50 60 • Web : www.vigan.com • E-mail : info@vigan.com

VIGAN manufactures dry agribulk materials handling systems:

• Portable pneumatic conveyors or grain pumps (100 - 250 tph);

• Pneumatic Continuous barge & Ship Unloaders (160 - 800 tph);

• Mechanical Continuous Ship Unloaders (up to 1,500 tph);

• Mechanical loaders (up to 1,200 tph).

as well as complete storage systems in ports and the agricultural industries.

From project design to complete turnkey bulk handling solutionsand port terminals with mechanical and/or pneumatic

reliable and cost effective equipment.

PYEONGTAEK PORTSouth Korea1 NIV 400 tphOn rails with cable reels

LATTAKIA PORTSyria 2 Mobile T200 2 x 250 tph

SWINOUJSCIEPoland (BUNGE GROUP)1 Loader 600 tph

An affiliate company of VAN DE WIELE group.

Latest references

Visit our web

site

www.vigan.com

Ann A5 victam 0212.indd 1 21/02/12 15:37:04

News March-April2012 NEWS

Intelligent pest management company Exosect’s latest product, the Exosex SPTab,

was launched in Spain recently by Comercial Química Massó.

Exosex SPTab, a unique pheromone product for stored product moth control, will be exclusively distributed in Spain by Comercial Química Massó, a market leader in speciality chemicals for a range of industries including agriculture and pest control. Commenting from Expocida, Michael Niven, Exosect’s key account manager said, “We have been working with Massó for well over a year and having recently obtained the Spanish registration for use in post-harvest storage and food production, we are absolutely delighted to be launching here at Expocida”.Exosex SPTab* is a unique mating disruption product for the control of the five key stored product moths which infest stored commodities including cereals, cocoa, pulses and tobacco as well as flour mills, confectionary, herbs, spices, dried fruit and nut production facilities. Exosex SPTab is a small tablet consisting of Exosect’s Entostat™powder formulated with minute quantities of the female sex pheromone common to five of the major moth pests of food processing; Plodia interpunctella, Ephestia elutella, Ephestia Kuehniella, Ephestia figulilella, Cadra cautella.The Exosex SPTab tablet works

by attracting male moths to the Entostat powder and female pheromone. As the male moths pick up Entostat powder, their pheromone receptors become overloaded with pheromone and they are unable to locate females. A male carrying Entostat powder will form a mobile pheromone dispenser, producing ‘false’ pheromone trails, which attract additional males.Contact between the males ensures that the Entostat powder and the confusion effect is automatically passed on, this process is called Auto-Confusion™. This product helps processors to reduce and/or eliminate insecticide sprays and consequently, reduces subsequent down-time in production associated with fumigation and spray regimes. Exosex SPTab was first developed in the UK where it was awarded the UK’s Society of Food Hygiene Technology (SOFHT) Award for ‘Best new product’ in 2008 and was an Agrow Awards finalist in 2009. The product has since been rolled out throughout Europe where it is now available in UK, France, Netherlands, Germany, Italy and now Spain. The product was also launched in Japan in 2011 and is fully registered in the USA. Derived from a natural ‘food grade’ wax which is sustainably harvested from palm trees, Entostat powder acts as a delivery system for a wide range of chemistry. Even through very slight movement, it develops an

electrostatic charge. Insects similarly develop an electrostatic charge as they fly through air or walk across physical surfaces. When placed in contact with insects, the powder adheres to them and can be passed from one insect to another through direct contact. This patented platform enables the use of very low doses of active ingredient and has potential

applications in many sectors including agriculture (agrochemical and biological formulation and reformulation, seed treatments, bio-control), apiculture, public health, and animal health.

More inforMation: Georgina Donovan, Exosect

Tel: 02380 603939 Email: georgina.donovan@exosect.com

Exosex SPTab launched in Spain

Grain&feed millinG technoloGy march - april 2012 | 9

Grain&feed millinG technoloGy march - april 2012 | 31

The hammer mills of Wynveen International BV allow a drive motor up to 400kW.

Furthermore, a so-called open rotor has been designed with two functions. One is to create sufficient stiffness and balance and secondly to minimise the temperature increase while grinding.

For monitoring purposes the main bear-ings and the chamber are fitted with tem-perature sensors. All components can also be delivered in an Atex execution. To make use of all four corners of the hammers and reduce the downtime of the machine, the direc-tion of rotation of the hammer mill can be changed and the rotor has double holes for the hammer axles. To ensure a good product entrance to the mill, a feeder is developed which contains an integrated, (automatically cleaned) magnet and a stone trap.

This will make sure that possible metal parts and/or stones are prevented from end-ing up in the feed mix. The combination of the two makes the feeder unique.

Risk analysesTo meet the latest stringent guidelines of

CE regulations, Wynveen International BV has conducted a risk analyses for its hammer mills.

This has been done for both non-hazard-ous environments and ATEX environments. To meet both as a standard, the hammer mills are equipped with proper earthing and sensors to detect possible increase of heat. Where required we make use of a pressure release membrane and/or flame arrestors.

For reducing the noise and vibration our hammer mills are provided with shock absorbers.

Much attention was spent to the ergonomic aspect. By designing two big doors, the ham-mer mills are very easy accessible for screen and hammer exchange. Both doors easily roll sideways via a rail and wheels and are equipped with safety switches to make sure that no mis-takes can be made during maintenance.

Other important points to keep in mind when designing a grinding plant are not only the right choice of hammer mill, but also the correct energy efficient motor type and very important, an adequate aspiration set-up. Especially the last item needs special attention.

The capacity of the aspiration fan should not only be in the right relation to the screen area of the mill but also depends on products, which have to be ground. Depending on the air volume, the necessary filter surface can be determined.

In general, reverse air cleaned filters are used, which allow for an air load on the filter cloth of approximately two m3/minute of air per m2 of filtering area.

Finally, it is important that the filter unit is not directly positioned beside the outlet product stream of the hammer mill to make sure that a good airflow and aspiration is safeguarded.

More inforMation:Website: www.wynveen.com

The lower part of the hammer mill is executed with screens; by making use of the gravity force a good discharge of product is possible. The idea of adjustable breaker plates was to create an asymmetric form (ellipse instead of circle) in the grinding chamber. Because of this the product is forced to leave their natural flow and, because of the centrifu-gal force the product will hit the breaker plate, as a result it is bounced back and then again gets a hit of the hammer.

So a more frequent frontal collision is achieved between hammers, breaker plates and product. By making the breaker plates adjustable we can create this ellipse in both directions.

exchange of the screen, while the motor is still running, it is important to maintain, an under pressure in the grinding chamber of the hammer mill. Special inflatable sealing’s with labyrinth ensure a correct tightness of the sealing in operation and stop’s the prod-uct leaving the grinding chamber.

To minimise energy consumption adjust-able breaker plates are introduced.

Tests have proven that hardly any grind-ing takes place below the level of the main shaft. By designing two adjustable breaker plates in the top of the machine, an energy saving of approximately 30–35 percent com-pared to the old designs has been achieved.

Grain&feed millinG technoloGy16 | march - april 2012

FEATURE

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In this issue:

• Improving supply from farm to fork

• Victam Asia Product Showcase

• Global grain & feed markets

March - April 2012

• Assessing cereal quality parameters

• Controlling Insects withheat

• Grinding by a proven concept makes your choice simple

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