Method for processing laterite-nickel ore

Abstract

The invention discloses a method for processing laterite-nickel ore. The method provided by the invention is characterized in that laterite-nickel ore undergoes an ore-washing treatment; noumeite and limonite-type laterite-nickel ore are separated; separated noumeite is melted by the pyrometallurgical process to generate ferronickel; and metallic nickel is extracted from the separated limonite-type laterite-nickel ore by the wet process. According to the method provided by the invention, based on the different mineral compositions of different laterite-nickel ore particle fractions, limonite-type laterite-nickel ore containing high content of iron and low content of magnesium is melted by the wet process to extract metallic nickel, thus leading to low acid consumption; noumeite containing low content of iron and high content of magnesium is melted by the pyrometallurgical process to extract ferronickel, thus leading to high quality of the produced ferronickel, high recovery rate of nickel, low energy consumption and simultaneous recovery of iron.

Description

technical field [0001] The invention relates to a method for recovering metal minerals from laterite nickel ore, in particular to a method for extracting metal from transition layer laterite nickel ore. Background technique [0002] Lateritic nickel ore is mainly divided into three mineral components with mining value: the limonite layer on the surface, the saprolite layer above the bedrock, and the transition layer between limonite and saprolite. The nickel-containing minerals in limonite are goethite and / or hematite; the nickel-containing minerals in saprolite are mainly minerals with high silicon and magnesium content, such as serpentine, magnesite, chlorite, Nontronite and montmorillonite etc. The ore in the transition layer contains both limonite and saprolite. Limonite-type laterite-nickel ore contains high iron and low magnesium content, and the magnesian-nickel ore is just the opposite. [0003] For lateritic nickel ores with different properties, how to extract m...

AI Technical Summary

Problems solved by technology

From the perspective of development trend, the country has higher and higher requirements for environmental protection and energy saving and emission reduction, and the development of pyrotechnics will inevitably be restricted due to the defect of high energy consumption. The problem of increased acid consumption caused by the leaching of magnesium in the ore by the conventional acid leaching process cannot be solved

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