Method for extracting nickel, cobalt and iron from laterite-nickel ore

• Main Authors: CAO JIAXU, GUO CHIHAO, MA HUI, LI DAJIANG, LIANG DONGDONG, YUAN CHAOXIN, SUN CONG, LIU QI, HU LEI, YU QUNBO, SUN YANWEN
• Format: Patent
• Language: Chinese; English
• Published: 19.03.2024
• Subjects: CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; MANUFACTURE OF IRON OR STEEL; METALLURGY; METALLURGY OF IRON; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention provides a method for extracting nickel, cobalt and iron from laterite-nickel ore, and relates to the technical field of nonferrous metallurgy. The method for extracting nickel, cobalt and iron from laterite-nickel ore comprises the following steps: mixing crushed laterite-nickel ore with an auxiliary agent and a chlorinating agent, and carrying out first smelting; mixing a melt obtained after the first smelting is finished with carbon powder and limestone, and carrying out second smelting to obtain liquid molten iron; and introducing the flue gas generated by the first smelting into an absorption liquid to obtain a nickel-cobalt-rich solution, adjusting the pH value of the nickel-cobalt-rich solution, and carrying out first precipitation and second precipitation to obtain a cobalt nickel hydroxide product. The method can significantly improve the reaction selectivity and efficiency, and has the advantages of high recovery efficiency of nickel, cobalt and iron, short process, low cost, low inves