Progress PresentationMmoloki Makoba Mine #: IN00033

Outline

Introduction

SHEQ

Process flow diagram

Challenges

Recommendations

2

Introduction

Due to ore depletion at the Phoenix pit, the DMS plant was commissioned in

2008 to upgrade very low grade ore to meet milling feed requirements.

DMS head feed grade cut-off is 0.10 Ni% & this is upgraded to 0.20 Ni%.

Heavy liquids have density measured in between that of the valuable material

and gangue so that the minerals lighter that the suspension floats and those

heavier would sink.

DMS plant is fed from a 14000 ton silo, it has four modules running parallel to

each other.3

SHEQ    Actual Target12 Month Rolling LTIFR 0.31 0.34YTD LTIFR 0.11 0.16Fatality 1 0YTD No LTI 4 4YTD No RWI 5

24YTD No MTI 7YTD No FAI 12YTD No Environmental Incidents 11 8

   Total days worked since the last LTI 7       Days worked without fatal 60  Hours worked per day 23229  Total Man Shifts worked without LTI 18067  YTD Hours worked 7479738  Total Man-hours worked since the last LTI 162603       Previous best LTI Free MHRS worked 6 887 700  Date of previous LTI 12 November 2014  Date of previous Fatal 20 September 2014      Total Man Shifts worked without Fatal 154860       Employee strength(TNMC & Contractors) 2581   4

DMS Material Flow sheet

5

DMS Sinks Upgrade ratio YTD

6

jan feb mar apr may jun jul aug sep oct1.2

1.4

1.6

1.8

2

2.2

actual

target

months

sin

ks

up

gra

de

ra

tio

DMS % Recovery YTD

7

DMS challenges

Low upgrade ratio & recovery mainly due to high nickel losses to the floats.

8

Probable Causes of Ni losses to floats

Premature failure of the vortex finder causing short circuiting of material to the floats

Nickel locked in the coarser particles 13.2- 37 mm

9

Worn out vortex finder causing short circuiting of material to the floats. The supplier has

been engaged to address this

quality problem

Recommendations

Liberation of Nickel

10

Recommendations

Testing of Cavex type cyclone with spiral feed inlet design

11

Any Questions?