The company invested 220 million yuan to build and put into operation the "120000t / a gold-containing tailings comprehensive recovery and utilization system" for the construction of the 13th Five-Year Plan for hazardous waste disposal facilities in Shandong Province. The system mainly processes the cyanide-containing tailings (HW33) and various copper-containing hazardous wastes (HW17, HW22, HW48) produced by the company's arsenic-containing gold concentrate comprehensive recovery system. The system uses environmentally friendly side-blowing smelting technology to capture gold and silver and other precious metals in the material through copper matte. Valuable metals such as gold, silver, copper, lead, zinc, antimony, iron, etc., realize the comprehensive utilization of resources.