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Garnierite leaching method

A nickel silicate and leaching technology, applied in the direction of improving process efficiency, etc., can solve the problems of inability to obtain leaching solution and difficulty in solid-liquid separation of materials, and achieve the effect of easy solid-liquid separation and avoiding formation

Inactive Publication Date: 2017-01-18
SICHUAN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

Due to NiSiO in nickel silicate ore 3 Reaction with acid during leaching produces silicic acid (H 2 SiO 3 ) colloidal substances, which makes the solid-liquid separation of the leached material very difficult, and in extreme cases, even the leachate cannot be obtained

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Example 1: Stir 1000g of nickel silicate ore powder (containing 18.2% nickel, particle diameter ≤ 180 mesh) and 341g of 98% concentrated sulfuric acid, and leave to react for 1h after stirring. Add 3.6L of water to the enamel reaction kettle, and carry out the stirring reaction (stirring speed 70r / min) for 1h, and the leaching temperature is 60°C. According to the laboratory analysis results of the washed leaching slag, the leaching rate of nickel is 99.1%.

Embodiment 2

[0015] Embodiment 2: 100kg of nickel silicate ore powder (containing 25.6% of nickel, particle diameter ≤ 180 mesh) and 45.8kg of 98% concentrated sulfuric acid were stirred, and after stirring, the reaction was left to stand for 2 hours, and the volume of the material added after the reaction was 0.5 m 3 256L of water was added to the titanium-lined reactor, and the stirring reaction was carried out (stirring speed 50r / min) for 3h, and the leaching temperature was 40°C. According to the laboratory analysis results of the washed leaching slag, the leaching rate of nickel is 98.6%.

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PUM

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Abstract

A garnierite leaching method disclosed by the invention comprises the steps of blending a garnierite powder and concentrated sulfuric acid, then carrying out standing reaction, adding water to the material after the standing reaction and then leaching.

Description

technical field [0001] The invention relates to a leaching method of nickel silicate ore. Background technique [0002] Nickel silicate ore is an important raw material for the production of metallic nickel, nickel salt and other materials. The wet process is the main process for producing the above materials, and the leaching process is an essential process in this process. In the wet process of producing metal nickel and nickel salt, the acid leaching system is basically used. Due to NiSiO in nickel silicate ore 3 Reaction with acid during leaching produces silicic acid (H 2 SiO 3 ) colloidal substances, which makes the solid-liquid separation of the leached material very difficult, and in extreme cases, even the leaching solution cannot be obtained. It is of great practical value to develop a leaching method for nickel silicate ore with high leaching rate and easy solid-liquid separation. Contents of the invention [0003] Aiming at the current problem of nickel s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/08C22B23/00
CPCC22B3/08C22B23/043Y02P10/20
Inventor 匡茜熹秦丹龙炳清
Owner SICHUAN NORMAL UNIVERSITY
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