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Method for removing chlorine in manganese electrolyte or zinc electrolyte

A zinc electrolyte and electrolyte technology, applied in the fields of purification and dechlorination and hydrometallurgy, can solve the problems of high price of silver salt, difficult to implement, and low recovery rate of silver regeneration, and achieve simple process, convenient operation and dechlorination effect. Good results

Inactive Publication Date: 2012-12-26
JISHOU UNIVERSITY
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

This method is simple to operate and has good chlorine removal effect, but the silver salt is expensive and the recovery rate of silver regeneration is low, so it is difficult to implement in production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Embodiment one: get 1000 milliliters of zinc electrolytic leaching solutions with chloride ion content 1560 mg / liter, join in the beaker, start stirrer, add bismuth hydroxide 11.4 grams, adjust the pH value 1.0 of solution with dilute sulfuric acid, filter after 1.5 hours, The chloride ion concentration in the filtrate was 72.4 mg / L, and the removal rate of chlorine was 96.0%.

Embodiment 2

[0011] Example 2: Take 1000 milliliters of manganese electrolytic leaching solution with a chloride ion content of 1238 mg / liter, add it to a beaker, start the stirrer, add 9.0 grams of bismuth hydroxide, adjust the pH value of the solution to 1.5 with dilute sulfuric acid, and react at 50 ° C Filter after 1.5 hours, the concentration of chloride ion in the filtrate is 52.0 mg / liter, and the removal rate of chlorine is 95.8%.

Embodiment 3

[0012] Embodiment three: get 1000 milliliters of zinc electrolytic leaching liquids with chloride ion content 1560 mg / liter, join in the beaker, start stirrer, add the bismuth hydroxide slag 11.4 grams that regenerates gained by the 3rd cycle, adjust solution with dilute sulfuric acid The pH value was 1.0, filtered after 1.5 hours, the chloride ion concentration in the filtrate was 78.5 mg / L, and the removal rate of chlorine was 95.0%.

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Abstract

The invention relates to a method for removing chlorine in manganese electrolyte or zinc electrolyte. The method comprises the steps of: adding a certain quantity of bismuth (III)-containing antichlor into chloridion-containing manganese electrolyte or chloridion-containing zinc electrolyte by means of continuous stirring; adjusting the pH value of the solution at 1.0-5.0, so that the trivalent bismuth ions are hydrolyzed to generate insoluble bismuth oxychloride precipitate on the premise of chloridion; filtering, wherein the filter liquor is used for the follow-up electrolysis production technology; and regenerating filter residue bismuth oxychloride precipitate by an alkaline solution to generate bismuth hydroxide for recycling, and timely adding a small quantity of antichlor in the process of recycling to compensate the loss in the process of regeneration.

Description

technical field [0001] The invention relates to the purification and dechlorination technology of manganese electrolyte and zinc electrolyte in hydrometallurgy, belonging to hydrometallurgy technology. Background technique [0002] Chlorine is a harmful impurity element in the electrolysis process of manganese and zinc. Before the electrolyte is sent to electrolysis, most of the chlorine in the solution must be removed. Chlorine mainly comes from the chloride of the metal raw ore. When the concentration of chloride ions in the electrolyte is greater than 100 mg / L, the corrosion rate of the electrolytic cathode and anode plates is greatly accelerated, which seriously affects the electrolytic efficiency and the quality of the electrolytic product, and increases energy consumption. , increase production costs, and deteriorate the environment of the production workshop. [0003] The traditional hydrometallurgy process chlorine removal methods are: [0004] 1. Ion exchange met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/44C25C1/10C25C1/16C22B19/00C22B47/00
CPCY02P10/20
Inventor 颜文斌申永强高峰石爱华熊绍锋
Owner JISHOU UNIVERSITY
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