METHOD FOR GREEN AND LOW-COST EXTRACTION OF NICKEL-COBALT FROM LATERITE NICKEL ORE

Abstract: a method for green and low-cost extraction of nickel-cobalt from laterite nickel ore includes the following steps: (1) iron removing pretreatment: adding an iron removing agent to the high-pressure leaching solution of the laterite nickel ore to reduce the iron concentration to less than 0.2 g/l to obtain a laterite nickel ore leaching solution; (2) nickel adsorption: adsorbing and enriching nickel in the laterite nickel ore leaching solution using a first resin adsorption process to obtain a nickel adsorption resin and a nickel adsorption tail liquid; wherein the nickel adsorption resin is desorbed to obtain a crude nickel solution; (3) cobalt adsorption: subjecting the nickel adsorption tail liquid to cobalt adsorption and enrichment by a second resin adsorption process and to obtain a cobalt solution by desorbing; (4) copper adsorption: subjecting the crude nickel solution to a third resin adsorption process for removing copper to obtain a purified nickel solution. the process of the disclosure is green, environmentally friendly, has a short process flow, saves the consumption of a large number of reagents, reduces the comprehensive recovery cost of nickel and cobalt, and can greatly reduce the amount of water in the process of purifying a nickel sulfate solution by removing copper through a resin, thus improving the production efficiency.

Inventor(s): KAIHUA XU, SATRYO SOEMANTRI BRODJONEGORO, WENJING WAN, TEGAR MUKTI AJI, RIZKY WANALDI, PIYAN RAHMADI, ANDI SYAPUTRA HASIBUAN, EMIL SALIM

CPC Classification: B01D15/1885 (SEPARATION (separating solids from solids by wet methods , ; by pneumatic jigs or tables ; by other dry methods ; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields ; centrifuges, vortex apparatus ; presses per se for squeezing-out liquid from liquid-containing material ; treatment of water , e.g. softening by ion-exchange ; {arrangements of air intake cleaners in gas turbine plants } ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation ))

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