Ultra fine Grinding for Gold -Silver recovery. Mining and Gold recovery methods

Description

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PLEASE READ THE ENTIRE LISTING AND COMPREHEND WHAT  YOU  ARE BUYING  BEFORE  YOU  MAKE YOUR PURCHASE.
CD- Book --- This information is on a CD-ROM . you will  not receive a printed book in paper. This is a digital CD-ROM  information  book. YOU WILL NOT RECEIVE A BOOK AS  PICTURED . IT IS AN INFORMATION CD-ROM
Ultra Fine Grinding - An Alternative Oxidative Treatment of
Refractory Precious Metal Ores
Precious Metals recovery methods
Introduction
The refractory nature of gold ores is often associated with gold finely disseminated in
sulphide minerals, such as pyrite, at conventional grind sizes. Conventional milling can
liberate the pyrite from the gangue allowing a low mass pyritic concentrate to be
produced by a process such as flotation. However, direct leaching of the concentrate
results in poor gold extractions as the cyanide lixivant is unable to contact the gold locked
or included within the pyrite .
CD - ROM Information Book - Gold, Silver, Platinum recovery methods. fine Grinding for Gold recovery . Mining  Gold recovery  methods. This information is on a CD-ROM . you will  not receive a printed book in paper. This is a digital CD information  book.
PLEASE READ THE ENTIRE LISTING AND COMPREHEND WHAT  YOU  ARE BUYING  BEFORE  YOU  MAKE YOUR PURCHASE.
CD- Book --- This information is on a CD-ROM . you will  not receive a printed book in paper. This is a digital CD-ROM  information  book. YOU WILL NOT RECEIVE A BOOK AS  PICTURED . IT IS AN INFORMATION CD-ROM
The traditional approach for such refractory material has been to liberate the locked gold
by chemically destroying the pyrite through oxidation. Roasting, pressure oxidation, and
bacterial oxidation all employ various degrees of temperature, pressure and catalysis to
react the pyrite with oxygen to produce an iron oxide and sulphur by-products. This
method efficiently liberates finely disseminated gold or gold in solid solution.
Whilst such oxidative reactions are metallurgically sound and are capable of achieving
high metal recoveries, the environmental aspects of treating the reaction products can
alter the economics of the process.
CD - ROM Information Book - Gold, Silver, Platinum recovery methods. fine Grinding for Gold recovery . Mining  Gold recovery  methods. This information is on a CD-ROM . you will  not receive a printed book in paper. This is a digital CD information  book.
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