Method for increasing efficiency of grinding of ores, minerals and concentrates
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United States of America Patent
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Apr 26, 2011
Grant Date -
Jul 30, 2009
app pub date -
Aug 8, 2006
filing date -
Aug 15, 2005
priority date (Note) -
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Abstract
A method for reducing particle size of a particulate comprising feeding a feed material to a grinding mill having a power of at least 500 kW, the mill having a specific power draw of at least 50 kW per cubic meter of grinding volume of the mill and the grinding mill including a grinding media comprising particulate material having a specific gravity of not less than 2.4 tons/m3 and a particle size falling in the range of from about 0.8 to 8 mm, grinding the feed material in the grinding mill and removing a product from the grinding mill, the product having a particle size range such that D80 of the product is at least about 20 microns.
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