Milling of Amenable Gold Ores

  • J. C. Yannopoulos


The objective of milling gold ores is to extract the gold for the highest financial return. To recover the maximum amount of gold, the ore must be finely ground in order to liberate the gold particles for gravity separation and/or chemical extraction. Ores yielding acceptable gold recovery (more than 88%) when “normally ground” (60–75% — 200 mesh), by direct cyanide leaching and defined as “amenable” (in contrast to the “refractory” ores, which require extremely fine grinding and/or pretreatment before cyanidation). A general flowchart of the processing steps required to extract gold from its ores is presented in Figure 4-1.


Cyanide Solution Gold Dissolution Steel Wool Gold Cyanidation Mill Feed 
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© Van Nostrand Reinhold 1991

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  • J. C. Yannopoulos

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