Method for recovering metal from laterite-nickel ore leaching liquid and producing magnesium salt by using resin adsorption method

Abstract

The invention discloses a method for recovering metal from a laterite-nickel ore leaching liquid and producing magnesium salt by using a resin adsorption method. The method comprises the following steps that the laterite-nickel ore leaching liquid which is subjected to iron precipitation undergoes adsorption and analysis through a first ion exchange resin to obtain a post-adsorption liquid, and the post-adsorption liquid undergoes the adjustment of the pH value, natural cooling and chilled water cooling in sequence to obtain precipitated magnesium salt and a post-magnesium-extraction liquid;and adsorption and analysis are carried out on the post-magnesium-extraction liquid through a second ion exchange resin to obtain a mixed solution containing nickel, cobalt and manganese. According tothe method, the nickel, the cobalt and the manganese can be selectively adsorbed from the laterite-nickel ore leaching liquid, moreover, the magnesium salt can be produced, separation and recovery ofthe nickel, the cobalt, the manganese and the magnesium are realized, and the technological process is shortened; the ion exchange resin is long in service life and low in regeneration cost, so thatthe production cost is reduced; and the obtained nickel, cobalt and manganese is high in purity and can be used for producing other downstream products, the additional value of the products is high, and the economic benefit is obvious.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy, and in particular relates to a method for recovering metal in laterite nickel ore leaching solution and producing magnesium salt by a resin adsorption method. Background technique [0002] The ore grade of laterite nickel ore is low, the cost of smelting is high, and the technical economy is poor compared with nickel sulfide ore. Due to the limitation of raw material grade, the key to the development and utilization of laterite nickel ore is to reduce production cost, simplify production process and production equipment. Atmospheric pressure heap leaching of laterite nickel ore can reduce production costs and increase production capacity, but there are still technical difficulties in the purification of laterite nickel ore leachate and the enrichment of valuable metals. The existing technology generally adopts the alkali or sulfide precipitation method to reclaim valuable metals such as ...

AI Technical Summary

Problems solved by technology

The existing technology generally adopts the alkali or sulfide precipitation method to reclaim valuable metals such as nickel, cobalt, and copper in the laterite nickel ore acid leaching solution. The defects of this technology are: the first is that the alkali consumption is high, which increases the production cost; The treatment of sulfide is likely to cause pollution and safety accidents; the third is that the recovery rate of valuable metals such as nickel and cobalt is generally low under this method

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