Comprehensive recovery method and application of thallium-copper-nickel sulfide slag

• Main Authors: FU ZHONGMENG, ZHANG RONGRONG, LIU YONGQI, LI CHANGDONG
• Format: Patent
• Language: Chinese; English
• Published: 02.08.2024
• Subjects: CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention provides a comprehensive recovery method and application of thallium-copper-nickel sulfide slag, and the comprehensive recovery method comprises the following steps: (1) roasting the thallium-copper-nickel sulfide slag to obtain a roasted product; (2) mixing the roasted product with an organic leaching agent, and leaching to obtain nickel-copper oxidizing slag and a thallium-containing leaching solution; (3) the nickel-copper oxidizing slag is subjected to acid leaching, and nickel-copper leaching liquid and waste slag are obtained; and (4) the nickel-copper leaching solution and nickel powder are mixed for a replacement reaction, and a nickel salt solution and spongy copper are obtained. The invention designs a recovery method with a simple process, thallium pollution is reduced, thallium recovery is realized, and nickel and copper in the sulfide slag are subjected to resource recovery, so that the hazardous waste sulfide slag is turned into wealth, the pollution to the environment is reduced,