Experimental study on two-stage roasting-leaching of arsenic-bearing gold concentrate in Tajikistan
The arsenic-bearing gold concentrate in Tajikistan has typical characteristics of refractory gold concen-trate,with a gold grade of 73.27 g/t,arsenic grade of 6.61％,and sulfur grade of 16.78％.When treated with direct cyanidation CIP process,the gold leaching rate was only 88.02％.In order to improve the gold leaching rate,experimental studies on two-stage roasting-leaching of arsenic-bearing gold concentrate were conducted,and the roasted slag was leached using the environmentally friendly leaching agent.The final results showed a good indicator of the gold grade in the leached residue at 4.32 g/t,with a gold leaching rate of 95.43％.This represents an increase of 7.41 percentage points compared to the direct cyanidation CIP process.The study provides guidance for the processing of similar types of gold ore resources.
万方数据
维普
