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Electrolytic zinc production technology

A production process, electrolytic zinc technology, applied in photography technology, photography auxiliary technology, instruments, etc., can solve the problems of increasing waste treatment costs, increasing production costs, large power consumption, etc., to achieve simple and efficient production process and save production costs , the effect of reducing waste of resources

Inactive Publication Date: 2017-08-29
宁夏鼎辉科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The traditional zinc smelting process is carried out in the concentrated sulfuric acid system. During the smelting process, the concentrated sulfuric acid needs to be heated to above 80°C before it can be used, which consumes a lot of power and increases the production cost; it also dissolves non-zinc substances, making the The treatment process is more complicated; the acid mist produced is corrosive and difficult to handle, causing secondary pollution to the environment
With the development of society and the advancement of technology, the process of smelting zinc by electrolysis has increasingly become a key field of research. However, in the production process, some waste liquids generated in the system have not been well recycled, resulting in A large degree of waste of resources also increases the cost of waste disposal

Method used

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  • Electrolytic zinc production technology

Examples

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Effect test

Embodiment 1

[0025] A production process of electrolytic zinc, comprising the following process steps:

[0026] (1) Leaching process: put zinc oxide into the aqueous solution of ammonia and ammonium chloride, use ammonia and ammonium chloride solution as the leaching agent, leaching the zinc in the material, and obtaining the leachate, wherein, the stirring speed is 60 rpm, and the reaction The temperature is 30°C, the reaction time is 4 hours, and the concentration of ammonium chloride is 250g / l; in this step, the leaching rate of zinc oxide is 89%;

[0027] (2) Oxidation process: add hydrogen peroxide with a mass concentration of 0.3% to the leachate, and react at 60°C for 0.5 hours to remove iron in the leachate, and then perform a pressure filtration to obtain a filtrate and a filter residue, wherein the hydrogen peroxide The dosage is to add 15L per ton of leaching solution, and the stirring speed is 60 rpm;

[0028] (3) Purification process: add zinc powder to the primary filtrate, ...

Embodiment 2

[0033] (1) Leaching process: put zinc oxide into the aqueous solution of ammonia and ammonium chloride, use ammonia and ammonium chloride solution as the leaching agent, leaching the zinc in the material, and obtaining the leachate, wherein, the stirring speed is 60 rpm, and the reaction The temperature is 60°C, the reaction time is 2 hours, and the concentration of ammonium chloride is 200g / l; in this step, the leaching rate of zinc oxide is 93%;

[0034] (2) Oxidation process: add hydrogen peroxide with a mass concentration of 0.3% to the leachate, and react at 30°C for 2 hours to remove iron in the leachate, and then perform a filter press to obtain a filtrate and a filter residue, wherein hydrogen peroxide The dosage is to add 20L per ton of leaching solution, and the stirring speed is 60 rpm;

[0035] (3) Purification process: add zinc powder to the primary filtrate, react at 30°C for 1 hour, then perform secondary pressure filtration to obtain secondary filtrate and seco...

Embodiment 3

[0040](1) Leaching process: put zinc oxide into the aqueous solution of ammonia and ammonium chloride, use ammonia and ammonium chloride solution as the leaching agent, leaching the zinc in the material, and obtaining the leachate, wherein, the stirring speed is 60 rpm, and the reaction Temperature is 45 ℃, and the reaction time is 3 hours, and the concentration of ammonium chloride is 350g / l; In this step, the leaching rate of zinc oxide is 96%;

[0041] (2) Oxidation process: add hydrogen peroxide with a mass concentration of 0.3% in the leachate, react at 45°C for 1 hour, use to remove iron in the leachate, and then perform a pressure filtration to obtain a filtrate and a filter residue, wherein the hydrogen peroxide The dosage is to add 18L per ton of leaching solution, and the stirring speed is 60 rpm;

[0042] (3) Purification process: add zinc powder to the primary filtrate, react at 45°C for 1.2 hours, then perform secondary pressure filtration to obtain secondary filt...

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Abstract

The invention belongs to the technical field of metal zinc smelting and relates to a technological method for producing a zinc ingot through the electrolytic method. The main technological steps of a production technology are that firstly, zinc oxide is put into an ammonia and ammonium chloride aqueous solution, and the ammonia and ammonium chloride solution is used as a leaching agent; secondly, hydrogen peroxide is added into obtained leachate for reaction to remove iron in the leachate; thirdly, after being subjected to filter pressing, zinc power is added into filtrate for purification; fourthly, secondary filer pressing is conducted, and filtrate is successively conveyed into a mother liquor tank and an electrolytic tank and subjected to electrodeposition treatment in an electrolyte; and fifthly, electrolytic zinc is obtained in a cathode plate and subjected to melting and casting treatment to obtain the zinc ingot and zinc slag. By adoption of the production technology, resource recycling is achieved, the high-purity zinc ingot product is obtained, the technology is simple and efficient, and production cost is saved.

Description

technical field [0001] The invention belongs to the technical field of metal zinc smelting, and relates to a process for producing zinc ingots by electrolysis. Background technique [0002] The traditional zinc smelting process is carried out in the concentrated sulfuric acid system. During the smelting process, the concentrated sulfuric acid needs to be heated to above 80°C before it can be used, which consumes a lot of power and increases the production cost; it also dissolves non-zinc substances, making the The treatment process is more complicated; the acid mist produced is corrosive and difficult to handle, causing secondary pollution to the environment. With the development of society and the advancement of technology, the process of smelting zinc by electrolysis has increasingly become a key field of research. However, in the production process, some waste liquids generated in the system have not been well recycled, resulting in A large degree of waste of resources a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/14C22B3/44C22B19/20C25C1/16
CPCC22B3/14C22B3/44C22B19/24C25C1/16
Inventor 徐家辉张恒滔
Owner 宁夏鼎辉科技有限公司
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