Dearsenification method of gold concentrates

Abstract

The invention discloses a dearsenification method of gold concentrates. The method comprises the following steps: preparing the gold concentrates into ore pulp, then spraying onto the surface of a block-shaped supporting object, and piling in; dropping and leaching with bacterial liquid; washing to remove acid through clean water; performing ore washing through an ore washing machine, so as to separate the support from the gold concentrates to obtain a product. The method has the advantages of being small in device assembling cost, small in energy consumption, good in the dearsenification effect, free of arsenic flue dust, adjustable in scale, and easy for industrialization; the leaked bacterial liquid contains iron, and arsenic can be removed completely after adjusting alkali and depositing; in addition, arsenic-containing substances are stable.

Description

technical field

[0001] The invention belongs to the technical field of gold concentrate production, and in particular relates to a method for removing arsenic from gold concentrate. Background technique

[0002] In the existing gold concentrate treatment process, if the arsenic content is high, the arsenic will enter the smoke and dust during the pyrometallurgy process, causing air pollution, and may cause secondary wrapping of gold, reducing the leaching rate of gold. The existing fire treatment process, such as two-stage roasting and lime roasting, cannot achieve the effect of removing arsenic very well. Some chemical treatment processes are mostly in the laboratory stage due to poor selectivity, large consumption of chemicals, and incomplete treatment. There are few studies on biological arsenic removal. In the prior art, stirring biological oxidation is mainly used. This method has poor selectivity to sulfide ore, insufficient removal of arsenic, high sulfur oxidation r...