G & T Metallurgical Services Ltd.

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The activities performed in the mineralogical laboratory are key to ensure that metallurgical optimization of a process design in the mineral processing laboratory, is achieved in a timely and cost effective manner.

The basic technique used is that of modal analysis. Modal analysis tracks the behavior of key minerals, by particle size range and by mode of association through a mineral treatment process.

Using modal techniques which, were largely developed in house, primary grind and regrind size requirements for a process are determined prior to flotation testing. By comparing the modal data for the new ore sample, with information from existing processes treating similar ore types, an accurate assessment of the probable response of the unknown ore can be readily deduced.

In addition to determining the grinding power requirements for a process, a basic treatment flowsheet and a reagent scheme for any given ore are also established using these methods. Our very extensive library of modal and metallurgical performance data for similar ores is used in conjunction with modal data generated from our studies of the ore samples provided by the client.

These modal techniques are used extensively by mining companies to guide process design studies to achieve optimum plant performance. The data are also used to target potential areas within the existing flowsheet to investigate how the processing can be modified to improve metallurgical efficiency. A single ore sample, or a suite of plant survey samples are used for this early phase of process design.

Using our Automated Digital Imaging System (ADIS) we are able to perform sparse mineral searches on target minerals such as gold, silver, platinum, palladium etc. The principal advantage of the system is the ability to rapidly scan polished sections for minerals at a rate of between 200 and 500 particles a second. The system records the number of grains observed in the entire polished section and the precise location of each target mineral.

Download ADIS PDF Gold Presentation.

Our mineralogical team are qualified to determine:

• The mineralogy of an ore or concentrator process stream sample.
• The locking characteristics of the mineral suite present in a sample.
• The effect of primary grinding and regrinding on mineral liberation in the process streams.
• The effect of mineral liberation and mineral locking characteristics upon subsequent metallurgical performance.
• Perform sparse mineral searches on important target minerals.

Quotations and Fee Schedules are available upon request.

"We Produce Bankable Quality Metallurgical Reports"