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Method for wet-leaching lateritic-nickel ore at transition layer

A technology of laterite nickel ore and transition layer, applied in the field of hydrometallurgy, can solve the problems of low metal recovery rate, achieve the effect of increasing nickel leaching rate and reducing consumption

Active Publication Date: 2011-10-12
广西银亿新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The metal recovery rate of this process is low, generally 70-80% for nickel and 40-60% for cobalt

Method used

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  • Method for wet-leaching lateritic-nickel ore at transition layer
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  • Method for wet-leaching lateritic-nickel ore at transition layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A transition layer laterite nickel ore produced in Indonesia, the composition of which is shown in the following table after analysis of ore samples:

[0028]

[0029] Wash the laterite nickel ore, and the -100 mesh slurry directly obtained from the ore washing is the limonite-type laterite nickel ore slurry with high iron content and low magnesium content; the crushing and grading treatment of silicon magnesium nickel ore larger than 100 mesh, of which The part with a particle size of 1-10mm is directly sent to the heap leaching treatment; the part larger than 10mm is returned to the system for re-crushing and grading; the part smaller than 1mm is sent to a ball mill to be ground into -100 mesh pulp, and this part of the pulp is used It is used for neutralizing the Simagnesian ore slurry. Treat the washed limonite-type lateritic-nickel ore slurry with a thickener and concentrate it into a slurry with a solid content of 30%. This slurry is added to the stirring leach...

Embodiment 2

[0031] A kind of transition layer laterite nickel ore produced in Indonesia. The laterite nickel ore is washed first, and the -100 mesh pulp obtained directly from the washing is the limonite type laterite nickel ore pulp with high iron content and low magnesium content; The 100-mesh silicon-magnesium-nickel ore is crushed and classified, and the part with a particle size of 1 to 10 mm is directly sent to the heap leaching treatment; the part larger than 10 mm is returned to the system for re-crushing and grading; the part smaller than 1 mm is sent to a ball mill to be finely ground into -100 mesh silicon-magnesium-nickel ore slurry, the treated slurry is sampled and dried, and analyzed by the ore sample, its composition is shown in the following table:

[0032]

[0033] Treat the washed limonite-type lateritic-nickel ore slurry with a thickener and concentrate it into a slurry with a solid content of 30%. This slurry is added to the stirring leaching tank, and concentrated ...

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Abstract

The invention discloses a method for wet-leaching lateritic-nickel ore at a transition layer. The method comprises the following steps: firstly washing lateritic-nickel ore at a transition layer so as to separate out limonite type lateritic-nickel ore and garnierite type lateritic-nickel ore; crushing and grading garnierite, sorting out ore with size fraction of 1-10mm for heap leaching to lixiviate metallic nickel, and mechanically grinding ore with particle size of less than 1mm into garnierite pulp with particle size of -100 meshes; adding concentrated sulfuric acid to limonite pulp for high-acid leaching under normal pressure; adding the garnierite pulp and nickel-containing solution subjected to heap leaching to the high-acid leaching pulp so as to neutralize residual acid; adding lime milk or limestone slurry for removing iron; and carrying out preliminary solid-liquid separation on the slurry without iron by utilizing a thickener, then finely filtering the slurry by utilizing apress filter, and further treating the obtained nickel-containing solution. The method has the advantages of simple flow, no need of ore pretreatment, the adoption of conventional leaching equipment,low acid consumption, good impurity removal effect, high nickel recovery rate and the like.

Description

technical field [0001] The invention relates to the field of hydrometallurgy, in particular to a method for extracting nickel by wet treatment of transition layer laterite nickel ore. Background technique [0002] Lateritic nickel ore can be simply divided into limonite type, residual ore type and silicon magnesium nickel ore type. The main difference lies in the content of iron and magnesium in the ore. Generally, residual mineral ores contain higher magnesium content, while limonite-type lateritic nickel ores contain higher iron content and lower magnesium content. The lateritic nickel in the transition layer is a mechanical mixture of limonite and silicon-magnesium-nickel ore, which belongs to the type of residual ore. [0003] At present, there are three main types of industrial production: ferronickel or high-matte nickel produced by pyromelting (referred to as pyrotechnics), reduction roasting and ammonia leaching to produce nickel products (called CARON process), and...

Claims

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Application Information

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IPC IPC(8): C22B3/08C22B23/00
CPCY02P10/20
Inventor 王多冬王亚秦李海燕陈彦林丘能施贵添付海阔
Owner 广西银亿新材料有限公司
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