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  • The Development of a Small-scale Test to Determine Work

    Jan 01 2008 · This paper describes the development of a small-scale batch test method for determining a work index for HPGR of a large number of samples that can be used to show the variability of the ore as an integral part of a geometallurgical approach to circuit design and production forecasting.The test equipment that was developed comprises a hydraulic

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    High-pressure rolls are currently being used successfully to comminute cement clinker and limestone (McIvor 1997). The use of high-pressure rolls in the mining industry has been slow however because of the high capital cost of the units and because the process has to be dry.

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    Small scale mining and particularly alluvial panning of minerals is a relatively new informal economic activity which has been sweeping across the globe in the past two decades. The stamp mill (or stamp battery or stamping mill) is a type of mill machine that crushes material by pounding rather than grinding either for further processing or

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  • The Development of a Small-scale Test to Determine Work

    Jan 01 2008 · This paper describes the development of a small-scale batch test method for determining a work index for HPGR of a large number of samples that can be used to show the variability of the ore as an integral part of a geometallurgical approach to circuit design and production forecasting.The test equipment that was developed comprises a hydraulic

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    impacts by the small-scale sector. Small scale is something of a misnomer because these miners frequently work on a semi-industrial scale employing heavy duty digging equipment and high pressure hoses. They also often use very large quantities of mercury to help extract the gold. Mercury has been linked to gold mining for centuries however a

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  • Hydraulic miningWikipedia

    Hydraulic mining is a form of mining that uses high-pressure jets of water to dislodge rock material or move sediment. In the placer mining of gold or tin the resulting water-sediment slurry is directed through sluice boxes to remove the gold. It is also used in mining kaolin and coal.. Hydraulic mining developed from ancient Roman techniques that used water to excavate soft underground deposits.

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