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A clean production method for the separation and comprehensive utilization of iron, nickel, cobalt and silicon in the process of hydrochloric acid atmospheric leaching of laterite nickel ore

A technology for the separation of laterite nickel ore and silicon, which is applied in the process of hydrochloric acid atmospheric leaching of laterite nickel ore, iron and nickel, separation and comprehensive utilization of silicon, and cobalt fields. problems, to achieve the effect of solving difficult processing and reducing the cost of raw materials

Active Publication Date: 2016-07-06
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If ordinary neutralizers are used to remove iron by precipitation, the amount of precipitation will be large, which will cause problems such as difficult filtration and large loss of nickel / cobalt entrainment; if extraction is used to remove iron, the amount of extractant will be large
Therefore, how to solve the problem of large acid consumption in the atmospheric pressure acid leaching process and the separation of Fe and Ni in the leaching solution is the main bottleneck for the industrialization of the atmospheric pressure acid leaching method.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Use limonite-type lateritic nickel ore as raw material, grind it, the particle size is controlled at 200 mesh, and the ore amount accounts for 90% of the total ore amount. After grinding, add 36% hydrochloric acid to the enamel reaction kettle at the acid ore mass ratio of 1:1 Mix and heat up, and start timing the reaction when the temperature reaches 100°C. After the reaction, the plate and frame filter press is carried out. The main elements in the acid leaching solution are: Fe: 120.7g / L, Ni: 2.88g / L, Co: 0.19g / L, Cr: 2.89g / L, Al: 5.98g / L, Mg: 3.03g / L. Then use serpentine-type laterite nickel ore as raw material, grind it, the particle size is controlled at 200 mesh, and the ore amount accounts for 90% of the total ore amount. After grinding, it is added to the homogeneous reaction with the above-mentioned leaching solution according to the acid ore mass ratio of 1:1. Mix and heat up in the kettle, and start timing the reaction when the reaction reaches 150°C. Aft...

Embodiment 2

[0042] Use limonite-type lateritic nickel ore as raw material, grind it, the particle size is controlled at 200 mesh, and the ore amount accounts for 90% of the total ore amount. After grinding, add 20% hydrochloric acid to the enamel reaction kettle at the acid ore mass ratio of 5:1 Mix and heat up, and start timing the reaction when the temperature reaches 60°C. After the reaction, plate and frame filter press is carried out. The main elements in the acid leaching solution are: Fe: 100.12g / L, Ni: 2.06g / L, Co: 0.1g / L, Cr: 1.67g / L, Al: 3.99g / L, Mg: 2.06g / L. Then use serpentine-type lateritic nickel ore as raw material, grind it, the particle size is controlled at 200 mesh, and the amount of ore accounts for 90% of the total ore amount. After grinding, it is added to the homogeneous reaction with the above-mentioned leaching solution according to the acid ore mass ratio of 2:1. Mix and heat up in the kettle, and start timing the reaction when the reaction reaches 120°C. Afte...

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Abstract

The invention discloses a laterite-nickel ore clean production method. The method comprises the following steps: brown iron type laterite-nickel ore hydrochloric acid normal-pressure leaching, selective leaching of serpentine type laterite-nickel ore in the above obtained acid leachate, a hydrolysis coupling reaction, and separation and purification of oxides containing Fe and Si to prepare fine iron powder and SiO2 for the building material industry. The method can solve the problems of difficult treatment and large acid consumption of traditional normal-pressure leachates of the laterite-nickel ore, and realizes the separation and comprehensive utilization of Ni, Co and Fe.

Description

technical field [0001] The invention belongs to the field of non-ferrous metallurgy technology and comprehensive utilization of mineral resources, and specifically relates to a clean production method for the separation and comprehensive utilization of iron, nickel, cobalt and silicon in the normal pressure leaching process of laterite nickel ore with hydrochloric acid. Background technique [0002] Nickel, as an important strategic metal, is widely used in aerospace, machinery manufacturing, electrical instruments and chemical metallurgy and other industrial sectors. The mineral resources of nickel mainly include nickel sulfide ore and nickel oxide ore (also known as laterite nickel ore). Nickel sulfide ore contains about 1% nickel, and the concentrate grade after beneficiation can reach 6-12%, plus the associated valuable metals (copper, cobalt) can reach 6-15%, and the economic value is relatively high. Therefore, the nickel produced by the world nickel industry in the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/10C22B23/00
CPCY02P10/20
Inventor 郭强曲景奎齐涛张培育时美玲孟龙
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI