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    Yalcin. hydrophobicity of gold particles after grinding are mostly recovered together with the pyrite gold reached a maximum level corresponding to a contact angle of 94°. a greater decrease in gold product on gold and ironbearing species. a ferric ore used.

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    For this purpose air is sucked through the mill, entering the mill from below the grinding table, streaming upward through the louver ring (4), ching the particles at the edge of the grinding table and passing through the dynamic air separator.

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    Copper/Molybdenum Ore. The figure above is a simplified flow sheet showing the basic steps involved in a copper mill producing the byproduct molybdenum. The crushed copper ore (containing, for example, % Cu and % Mo) is fed to the grinding circuit where water is added and the ore is ground to the proper size.

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    The amount of grinding aid system employed to increase grinding efficiency,, the rate and type of oreparticle breakage,, ore classifiion, which can respectively be described as the "selection" and "distribution" functions of grinding, will vary depending upon certain factors including properties which are unique to coal and each ore.

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    where R represents the ratio: % Pb in crude ore/% Cu in crude ore Formula (32) is very convenient for milling calculations on ores of this type. Example: An ore contains 5% lead and 1% copper.

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    If the ultrafine particulate gold is restricted to sulphides. 80% passing 20 μm or 80% passing 10 μm) to expose the particulate gold. locked in sulphide or other gangue. such as pyrite. often preceded by a concentration step such as gravity separation or flotation (Marsden and House.

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