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Method for processing nickel chloride leachate

A treatment method, nickel chloride technology, applied in the field of leaching slag washing and leaching of slag nickel in nickel smelting hydrometallurgy, can solve the problems affecting the recovery rate of nickel metal, etc., and achieve convenient operation, low nickel content, and simple process Effect

Active Publication Date: 2009-07-08
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The slag contains high nickel content in the leaching slag, which directly affects the recovery rate of nickel metal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Add nickel chloride leaching slag to the steam condensed water formed during the evaporation process of nickel chloride production to make a slurry with a volume ratio of nickel chloride leaching slag and washing liquid of 1:4, control the temperature at 85°C, and then pass it into The oxidation-reduction potential is controlled by chlorine gas at 460mv, the aging reaction is carried out for 4.5 hours, and the slag-liquid separation is carried out to obtain nickel chloride leaching slag containing less than 5% nickel.

[0010] Comparison of nickel content in nickel chloride leaching slag before washing and after washing %

[0011] The leaching slag contains nickel before washing 7.89 8.21 6.45 8.91 7.86 The leached slag contains nickel after washing 3.46 3.56 3.41 3.52 3.28

Embodiment 2

[0013] Add nickel chloride leaching slag to the steam condensed water formed during the evaporation process of nickel chloride production to make a slurry with a volume ratio of nickel chloride leaching slag and washing liquid of 1:4, control the temperature at 87°C, and then pass it into The oxidation-reduction potential is controlled by chlorine gas at 450mv, the aging reaction is carried out for 4.2 hours, and the slag-liquid separation is carried out to obtain nickel chloride leaching slag containing less than 5% nickel.

[0014] Comparison of nickel content in nickel chloride leaching slag before washing and after washing %

[0015] The leaching slag contains nickel before washing 8.76 6.78 7.69 9.21 7.98 The leached slag contains nickel after washing 2.21 3.16 3.42 3.64 3.69

Embodiment 3

[0017] Add nickel chloride leaching slag to the steam condensed water formed during the evaporation process of nickel chloride production, make a slurry with a volume ratio of nickel chloride leaching slag and washing liquid of 1:4, control the temperature at 90°C, and then pass it into The oxidation-reduction potential is controlled by chlorine gas at 440mv, the aging reaction is carried out for 4.0 hours, and the slag-liquid separation is carried out to obtain nickel chloride leaching slag containing less than 5% nickel.

[0018] Comparison of nickel content in nickel chloride leaching slag before washing and after washing %

[0019] The leaching slag contains nickel before washing 9.21 8.76 8.21 7.89 7.86 The leached slag contains nickel after washing 3.64 3.81 4.06 3.46 3.28

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Abstract

A treatment method of nikel chlorite leach residue relates to a washing and leaching method of leach residue of nikel slag in nickel-smelting hydrometallurgy. The method is characterize in that the nikel chlorite leach residue is added to the vapor condensation liquid generated by the process of nikel chlorite production, so as to solve a slurry with volumic ratio of 1 : 4 of the leach residue to lotion. At a temperature of 85 to 95 DEG C, Chlorine is pumped into, on redox potential 430 to 460mv and after a reaction time of 3.5 to 4.5 hours the slag-liquid are separated to gain nikel chlorite leach residue of less than 5 percent nikel content. The method of the invention has the advantages of simple technique and easy operation, and effectively reduces nikel content of the nikel chlorite leach residue and increases recovery of valuable metal in the nikel chlorite production.

Description

technical field [0001] The invention discloses a treatment method for leaching slag of nickel chloride, and relates to a method for washing and leaching leaching slag of slag nickel in nickel smelting hydrometallurgy. Background technique [0002] At present, in the production process of selective leaching of nickel sulfide chlorine gas, the nickel content of chlorination leaching residue is generally between 8% and 12%. Raw materials used in the production of precious metals. The nickel content in the leaching slag is relatively high, which directly affects the recovery rate of nickel metal. Contents of the invention [0003] The purpose of the present invention is to provide a method for washing leaching slag that can effectively reduce the nickel content in the leaching slag and improve the recovery rate of nickel metal. [0004] The purpose of the present invention is achieved through the following technical solutions. [0005] A treatment method for nickel chloride...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/04C22B3/00C22B7/00C22B23/00
CPCY02P10/20
Inventor 李书山曹增城范春龙
Owner JINCHUAN GROUP LIMITED