· When the arsenopyrite ore is crushed and ground, it occurs that the pores of the ore have been cracked and the gold has been dissociated. In the arsenopyrite gold mine, the Au content is %, the Ag content is %, the As content is %, the S content is %, and the Fe content is %. Brief extraction method of gold in arsenopyrite
For that reason, it is necessary to separate pyrite and arsenopyrite. It is common to find an arsenopyrite concentrate refractory to the cyanidation process. Other part of the research work is to find a process to treat this refractory material. The first step is .
· A pressure oxidation procedure that has gained commercial status for treating goldbearing arsenopyrite or pyrite employs sulfuric acid (H2SO4) and oxygen as reagents. High temperatures (170° to 190° C) and pressures (up to 400 psig O2) are required to achieve complete oxidation of .
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· Arsenopyrite had no effect on gold dissolution at pH realgar had no adverse effect on gold dissolution at pH 10 or 11 but at pH 12 the retarding effect was significant. Orpiment was detrimental to gold leaching, the retardation becoming more pronounced as pH increased. The extractions in 48 hours at pH 10, 11, and 12 were 73, 44, and 19%, respectively, as compared with over 95% in the case of ...
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