| A high arsenic polymetallic ore in Yunnan have valuable and precious metals, lead, zinc, gold, silver and indium, The conventional recovery methods have serious environmental pollution, so the ore was pretreated by oxidizing acid pressure, and then to recovery zinc and copper from the acid leaching solution, gold and silver from the leaching residue leached by thiourea leaching. Under the optimal conditions, the leaching percentages of gold and silver was raise to 93.94% and 96.85% from 11.29% and 14.17% at no pretreatment respectively, the leaching speed is also greatly improved, it can obtain better economic benefits. |
