Treatment method of laterite-nickel ore

• Main Authors: LIU CHENG, ZHAO PENGFEI, CHEN LONG, WANG HENGLI, DING SHURONG, ZHANG YANG, QIN MINGXIAO, YIN SHUYAN
• Format: Patent
• Language: Chinese; English
• Published: 05.03.2024
• 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 belongs to the technical field of hydrometallurgy, and particularly relates to a treatment method of laterite-nickel ore. According to the treatment method provided by the invention, the nickel and the cobalt are recovered in a manner of mineral separation, high-pressure acid leaching, cyclic leaching and ore pulp neutralization, CCD washing, underflow filter pressing and reduction smelting, and a byproduct ferrosilicon alloy is produced. According to the method, on the basis that nickel and cobalt are extracted through an existing conventional method, reduction smelting is conducted on the leaching residues obtained through high-pressure acid leaching of the high-silicon laterite-nickel ore to obtain the ferrosilicon alloy, the environmental protection problem caused by generation of a large amount of leaching residues is solved, and productization and high added value of iron and silicon are achieved. After high-pressure acid leaching is adopted, the nickel and cobalt leaching rate is high, du