The Asia Miner

JUN 2018

The ASIA Miner - Reporting Important Issues to Mining Companies in the Asia Pacific Region

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Page 42 of 51

Steinert the asia miner • volume 15 • issue 2 41 SUPPLIER NEWS: Steinert For any new mineral beneficiaƟon project, the iniƟal approach to test work is based on informaƟon supplied from the Geological exploraƟon program, Assays & Mineralogy. The design metallurgist examines the mineral dressing opƟons to achieve valuable mineral separaƟon from the gangue- waste minerals based on the properƟes of minerals such as size, specific gravity, magneƟc suscepƟbility, conducƟvity, colour, floatability and solubility. The associaƟon of the minerals in the ore is important to the process consideraƟon in that inƟmate relaƟonship, where the degree of disseminaƟon determines the amount of reducƟon required by crushing and grinding to achieve liberaƟon. The key determinaƟon is the size of the valuable mineral or minerals liberated from the gangue-waste and from other minerals in the mineral suite. The minerals contained in the suite will need to be idenƟfied and quanƟfied by a mineralogist. In developing the process flowsheet, pre-concentraƟon of the ore should always consider that the ore can have major advantages. The size of all down-stream processes can be reduced, or conversely the throughput increased, which could be parƟcularly significant in terms of operaƟng cost and product output. It can add previously uneconomic zones to reserves or help manage ore blending programs more effecƟvely. By being applied to selecƟve high-grading of low grade stockpiles and waste dumps, it can recover value from previously uneconomic waste, reduce environmental risks, costs, tailings dam sizes and milling energy requirements. AddiƟonally, pre-concentraƟon of ore underground or at remote sites can reduce haulage and hoisƟng costs. Satellite ore bodies can be mined more effecƟvely if scalping can be carried out in-pit. Sensor sorƟng technology offers the possibility to increase the longevity of the lower-grade resources found in many operaƟons, and realise the potenƟal for profitable development of marginal resources. STEINERT's soluƟons range offers a variety of sensor sorƟng technology measuring some of the above-menƟoned mineral characterisƟcs at high speeds. The technology can merge the informaƟon from any combinaƟon of sensors and in doing so, gather more data about the parƟcles than a single sensor can. For example, by combining an XRT sensor's signal with that of a 3D laser scanner, parƟcles can be separated from one another based on both density and the rate of refracƟon of light within a parƟcular mineral. UƟlising the different sensors to idenƟfy and sort material, the STEINERT KSS uses sophisƟcated technology that can be "taught" to sort a range of items. These sensor-sorƟng systems are equipped with acƟve valve control for a reducƟon in compressed air consumpƟon versus standard air ejecƟon systems. The required air blast pressure and number of controlled compressed-air valves can be opƟmally adjusted for the materials being sorted. Sorting solutions for cost reductions and improved throughput and recovery rates Steinert's sensor sorƟng technology offers the possibility to increase the longevity of lower-grade resources SNAPSHOT OF THE STEINERT KSS • Feeding material: ores • Sensor type: shape, inducƟon, color & X-ray • ResoluƟon local: < 1 mm • Nozzle gap: 12.5 mm • FracƟon size: from 15 mm up to 200 mm • LighƟng: Laser and LED (LED for color) • SorƟng width: 1000, 2000, 3000 mm

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