News
2004 Archive
| Index | Source |
| Caledonia Mining installs MMS G-Cell and Aachen Aerator Technology at Barbrook | Maelgwyn Minerals Website - December 2004 |
| MMS and MINTEK collaborate over Imhoflot G-Cell | Maelgwyn Minerals Website - April 2004 |
| G-Cell
Technology for Coal
Research at SIU |
Maelgwyn
Minerals Website -
January 2004 |
 |
Caledonia
Mining installs MMS
G-Cell and Aachen Aerator Technology at Barbrook (General Information Release December 2004) |
| The Barbrook Mine is a recent revival of a greenstone mine extracting gold from carbonaceous sulphide veins running through the rugged mountainsides near the Swaziland borders of Mpumalanga, South Africa. Canadian listed Caledonia Mining Corporation has made the most of new technology in turning around the challenging mining venture. The reconfigured plant is operating at a capacity of 6,000 tonnes per month with head grades averaging 8g/t gold. They have recently installed proprietary technology supplied by Maelgwyn Mineral Services thought its South African subsidiary, Greenhills Mining & Industrial Services (Pty) Ltd |
 Imhoflot G-Cells installed at Barbrook Gold Mine  Aachen aerator installed at Barbrook Gold Mine |
The
equipment includes a 2-stage Imhoflot
G-Cell cleaner flotation plant
to upgrade rougher flotation concentrates, which in turn drives
improved recoveries and efficiencies of the oxidation and leach
processes. The Imhoflot G-Cell is an enhanced pneumatic flotation
device utilising intensive pre-aeration and a centrifugal froth
separator. With all aeration and process energy derived from the slurry
pump delivery the benefits of the system include an extremely short
residence time and absence of moving parts and instrumentation. The
stainless steel G12 has a 1.2m diameter and a single pass capacity of
up to 30m3/h. Simplicity of operation and low maintenance costs are
added bonuses, considering the flotation plant has quadrupled
concentrate grades and simultaneously improved recoveries.
In addition Barbrook Mine has installed two MMS Aachen Aerator leach reactors to drive the sulphide oxidation and cyanide leaching process at the plant. These proprietary in-line ceramic aerators operate at elevated pressure and incorporate microporous diffusers and intensive after-mixing technology. This gives dramatic increases in reaction kinetics using liquid oxygen. The first Aachen REA 300 has been installed as a pre-aeration device for sulphide oxidation. It has resulted in a 25% increase in gold recovery on the plant. The second Aachen REA 150 is operating in the subsequent cyanidation leach process. The result being that gold leaching is completed in the REA 150 circuit, allowing the Resin-in-Pulp circuit to be optimised for gold adsorption. The improved chemistry of the Aachen Aerators is attributed to the massive interfacial area produced by the formation of extremely fine and dispersed bubbles.  |
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MMS
and
MINTEK collaborate over Imhoflot G-Cell (General Information Release April 2004) |
|
MMS, as part of a collaboration agreement with Mintek, has supplied a two stage 0.8m diameter G-Cell pilot plant to the research institute at its Randburg headquarters. Mintek is engaged in research and development and technology transfer in the mining, metallurgical and chemical industries and has extensive research and development resources and facilities.MMS and Mintek will co-operate on a confidential basis with each other
for the process development of the Imhoflot G-Cell for use in flotation
processes in the mining and metallurgical industries. It is envisaged
the initial targets will be the recovery of platinum group metals in
South Africa.
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G-Cell
Technology for Coal
Research at SIU (General Information Release January 2004) |
| MMS
has supplied an Imhoflot G08 G-Cell pilot plant to Dr Manoj K. Mohanty Associate Professor Southern Dept. of Mining & Mineral Resources Engineering for Research and Development initiative programmes for fine coal process technology. The test unit is avaible for commercial testwork through the University. |
 800mm Diameter test unit G-Cell supplied to SIU for research and development |
Proposed Application and
Scope The
G-Cell will be used to evaluate performance for fine coal on a
semi-continuous
pilot scale in coal preparation plants operating in the SIU
will undertake work aimed at conducting a scientific study to
investigate the
best potential of the Imhoflot G-Cell in comparison to the optimum
flotation
cleanability provided by standard release analysis. |