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A two-stage impurity removal process for nickel sulfide soluble anode nickel electrolytic purification

A technology of nickel electrolysis and nickel sulfide, applied in the chemical industry, can solve the problems of low reaction efficiency, high production cost, long process flow, etc., and achieve the effect of reducing process flow, reducing production cost and shortening time

Active Publication Date: 2020-07-03
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a two-stage process for electrolytic purification of nickel sulfide soluble anode nickel, which solves the problems of long process flow, low reaction efficiency and high production cost

Method used

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  • A two-stage impurity removal process for nickel sulfide soluble anode nickel electrolytic purification
  • A two-stage impurity removal process for nickel sulfide soluble anode nickel electrolytic purification
  • A two-stage impurity removal process for nickel sulfide soluble anode nickel electrolytic purification

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preparation example Construction

[0028] The preparation method of the alkaline copper removal reagent is as follows: first dilute the liquid caustic soda (sodium hydroxide) to 10-15%, then place the prepared liquid caustic soda on a heating plate and heat it to 95-100°C, add anode slime, Raise the pH of the solution to 10-12, stir and heat while adding anode slime, start adding nickel carbonate when the temperature reaches 100°C, and start timing. The reagent preparation time is 0.5-2h, and the prepared reagent is sampled for analysis.

[0029] The anode slime and nickel carbonate are added in a weight ratio of 4-6:1, and the liquid alkali solution and nickel carbonate slurry are mixed in a volume ratio of 30-50:1; the three reagents are mixed and reacted for about 3 hours at a temperature of 100°C.

[0030] The pH of the anolyte of the present invention is 0.5-2, and the flow rate is 200-300m 3 / h.

[0031] The amount of anode slime is calculated according to the amount of copper fed into the anolyte and a...

Embodiment 1

[0036] A preparation method of alkaline copper removal reagent is as follows: take 500g of anode slime (about 90% sulfur content), nickel carbonate volume 71mL (specific gravity 1.3-1.5g / cm 3 ) that weighs 95g, lye 2800mL, add 2800mL of lye diluted to 10% into a 5L beaker, then pass the diluted lye into steam and heat to 100°C, then add 500g of anode slime, stir and mix evenly, then add nickel carbonate The slurry solution was mixed and reacted for 2 hours until the color of the solution turned reddish brown, and the pH of the detection end point was 10, the stirring was stopped and the volume of the solution was recorded, and the sulfur content was analyzed by sampling.

[0037] A two-stage impurity removal process for electrolytic purification of nickel sulfide soluble anode nickel, specifically comprising the following steps:

[0038]Step (1). One-stage anolyte copper removal: take the electrolytic anolyte and retain a sample for analysis (to save costs, it can be the same...

Embodiment 2

[0047] A preparation method of alkaline copper removal reagent is as follows: take 800g of anode slime, 110mL of nickel carbonate (specific gravity 1.3-1.5g / cm 3 ), that is, the volume is 145g, take 3800mL of liquid caustic soda diluted to 10%, add the liquid caustic soda into a 5L beaker, then heat the diluted liquid caustic soda to 100°C with steam, then add 800g of anode slime, stir and mix evenly, and finally add carbonic acid The nickel slurry solution was mixed and reacted for 2.5 hours until the color of the solution turned reddish brown, and the pH of the detection end point was 9. Stop stirring and record the volume of the solution, and take a sample to analyze the sulfur content.

[0048] A two-stage impurity removal process for electrolytic purification of nickel sulfide soluble anode nickel, specifically comprising the following steps:

[0049] Step (1). One-stage anolyte copper removal: take anolyte 2500mL, copper content 0.68g / L, copper content 1.7g, alkaline cop...

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Abstract

The invention discloses a two-stage impurity removing technology for electrolytic purification of nickel sulfide soluble anode nickel. According to the technology, alkaline copper removing reagent ismainly adopted under the circumstance without adjusting acid, at first, the working procedure of anode liquid copper removing is carried out, and after copper is removed, PH of a solution rises naturally; after the copper is removed, slag liquid is filtered through a pipe type filter, and after filtering is carried out, the slag is subjected to acid leaching to recover main metal nickel, copper and the like; the solution enters a solution intermediate groove, then the working procedure of iron and cobalt removing is carried out by means of the chlorine oxidation reaction, after iron and cobaltare removed, the generated slag enters the slag treatment working procedure through the pipe type filter so that iron slag and cobalt slag can be separated to recover valuable metal, the solution obtained after iron and cobalt are removed is filtered and conveyed to the electrolytic working procedures for electrolytic production, and the original three-stage purification technology of removing iron, copper and cobalt is changed into two-stage purification technology of copper and iron removing, the technology flow is reduced, and the production cost is reduced.

Description

technical field [0001] The invention belongs to the field of chemical industry and relates to a nickel sulfide soluble anode nickel electrolytic production process, in particular to a two-stage impurity removal process for nickel sulfide soluble anode nickel electrolytic purification. Background technique [0002] In the nickel sulfide soluble anode nickel electrolysis production process that has been developed for more than 50 years, impurities such as cobalt, copper, iron, lead, zinc, arsenic and other impurities are dissolved into the anolyte during the electrolysis process of the anode plate, and the anolyte is purified through "three stages "The impurity removal process removes these impurities, and recovers the main metal from various types of slag; the purification "three-stage" process sequence is iron removal, copper removal, and cobalt removal. The iron removal process uses hydrolysis neutralization to remove iron , mainly to heat and ventilate the anolyte, and the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C7/06C25C1/08C22B7/00C22B15/00C22B23/00
CPCY02P10/20
Inventor 胡继刚许立佩关敬升楼江辉周通郑军福王宝林王得祥周海荣吕海波
Owner JINCHUAN GROUP LIMITED
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