The company built a 200t / d comprehensive recovery system for hard-to-smelt gold concentrates in 2012, using international classic two-stage roasting, arsenic removal, desulfurization, redox, purification, acid conversion by two conversions, cyanide leaching, zinc powder replacement The advanced production technology and the original technology developed by the company can successfully process various refractory gold concentrates containing high arsenic, antimony and carbon, and comprehensively recover valuable metals and non-metals in the gold concentrates. The entire production process adopts informatization and closed-loop management, which is safe, environmentally friendly and reliable, and fully realizes the comprehensive utilization of resources and cleaner production.