Method for comprehensive utilization of laterite nickel ore

Abstract

A method for comprehensive utilization of laterite nickel ore comprises the following steps: (1) pulverizing laterite nickel ore, grinding, mixing with ammonium bisulfate, and roasting; (2) dissolving and filtering the roasted clinker to obtain a filtrate, depositing iron by an ihleite method, and depositing iron by a goethite method; (3) performing nickel deposition of the filtrate obtained after iron deposition by sodium sulfide, preparing a nickel sulfide product; (4) performing magnesium deposition of the filtrate obtained after nickel deposition by sodium hydroxide to obtain magnesium hydroxide; (5) washing, drying and calcining magnesium hydroxide to prepare a magnesium oxide product; (6) using the roasted clinker dissolved slag as a microsilica fume product directly, wherein the main component of the slag is silica; (7) calcining ammonium jarosite to obtain an iron oxide product.

Description

technical field

[0001] The invention relates to a method for processing laterite nickel ore, in particular to a method for comprehensively utilizing laterite nickel ore Background technique

[0002] Laterite nickel ore is a mixture of hydrated iron oxide and hydrated magnesium silicate formed by long-term weathering, leaching, alteration and enrichment of nickel-containing ores. The lateritic nickel deposit can be divided into three layers: the limonite layer, the silicon-magnesium-nickel layer and the transition layer between the two. The chemical composition of lateritic nickel ore varies not only from deposit to deposit, but even in the same deposit, the content of nickel, cobalt, iron, magnesium, etc. also varies with the depth of the deposit. There are mainly two methods of recovery and treatment of laterite nickel ore: fire method and wet method.

[0003] The fire method includes reduction smelting to produce ferronickel and reduction vulcanization smelting to produc...

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