Method for extracting nickel and cobalt by chloridizing and volatilizing laterite-nickel ore

• Main Authors: CAO JIAXU, MA HUI, LIANG DONGDONG, SUN CONG, LIU QI, HU LEI, YU QUNBO, GUO CHIHAO, LI YIBIN, YUAN CHAOXIN, LYU NAN, MU LIANGZHAO, SUN YANWEN
• Format: Patent
• Language: Chinese; English
• Published: 21.03.2023
• 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 method for extracting nickel and cobalt by chloridizing and volatilizing laterite-nickel ore, and relates to non-ferrous metallurgy. The method for extracting nickel and cobalt by chloridizing and volatilizing the laterite-nickel ore comprises the following steps: carrying out first roasting on the laterite-nickel ore, then mixing with a chlorinating agent and an auxiliary agent, and carrying out second roasting; introducing the flue gas generated by the second roasting into an absorption liquid to obtain a chloride solution, then adding an alkaline substance into the chloride solution, and carrying out solid-liquid separation after a reaction to obtain a cobalt nickel hydroxide product and a filtrate; heating, concentrating and crystallizing the filtrate by adopting the flue gas to obtain chloride, and returning the chloride to be used as a chlorinating agent. According to the method for extracting nickel and cobalt through chloridizing volatilization of the laterite-nickel ore, due