Abstract: The arsenic-bearing gold mine in Qinghai province is a refractory one, where the gold cyanidation-leaching rate only reaches 41% in flotation process.Therefore, a roasting-cyanidation leaching experiment for gold concentrates is made.And the effect of roasting stage and temperature on roasting, and the effect of grinding size, the densities of sodium cyanide, the variety and consumption of protective alkali, liquid-to-solid ratio and leaching time on gold leaching are investigated.Then an optimum condition is determined to make gold leaching over 90.54 % for flotation gold concentrates.

Key words: Refractory arsenic-bearing gold concentrate, Roasting pre-treatment, Cyanidation leaching