A method for reducing arsenic and improving quality of fine particle high-arsenic copper concentrate

Abstract

The present invention discloses a method for reducing arsenic and improving quality of fine particle high-arsenic copper concentrate, which belongs to the field of mineral processing technology. The invention comprises: (1) Adding water to the fine particle high-arsenic copper concentrate to mix and obtain a slurry; (2) adjusting the pH value of the slurry obtained in step (1); (3) using glutathione as an inhibitor for arsenic minerals such as arsenopyrite, and conducting flotation on the slurry to complete the reduction of arsenic and improvement of quality of the fine particle high-arsenic copper concentrate. The invention removes the impurities from the fine particle high-arsenic copper concentrate, and then uses glutathione as an inhibitor for flotation to reduce arsenic. This effectively solves the problem of separation between chalcopyrite and arsenopyrite caused by the good floatability of fine particle arsenopyrite in fine particle high-arsenic copper concentrate. It can significantly reduce the arsenic content in the copper concentrate while ensuring a high recovery rate of copper, providing a new and efficient reliable approach for the flotation reduction of arsenic in high-arsenic copper concentrate.