Mineralogical Characteristics and Refractory Properties of Arsenic-bearing Gold Concentrate

Abstract The arsenic-bearing gold ore in Anhui, China is an extremely refractory ore, and the cyanide leaching rate of concentrate only 30%. mineralogical factors low were discussed by process analysis. results demonstrate that contains 20.30 g/t gold, 3.39% arsenic, 29.80% sulfur, 4.10% iron. Gold exists occurrence states metallic mineral-wrapped gangue fissure which account for 64.90%, 8.31%, 26.79% respectively. Pyrite, arsenopyrite, realgar, sphalerite, pyrrhotite are main minerals concentrate. Among them, pyrite accounts 51.20%, arsenopyrite 24.30%. Gangue include feldspar, sericite, quartz, calcite, chlorite. quartz 30.30%, 22.70%, 22.10% In addition, grain size distribution characteristics various obtained, texture structure analyzed. Pyrite arsenic phase causing rate. presence carbonate clay also has effect on leaching. oxidation pretreatment can increase to about 94%. findings provide a theoretical foundation selection manufacturing techniques businesses play important guiding role development similar ores.