Method for removing chloride ions in electrolytic manganese solution

A technology for electrolysis of manganese and chloride ions, applied in the field of manganese hydrometallurgy, can solve problems such as large loss of manganese resources, closure of production enterprises, increase in production costs, etc., and achieve good regeneration capacity, low loss, and small amount of chlorine removal residue. Effect

Inactive Publication Date: 2018-01-26
曹德忠
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] To sum up, the problems existing in the existing technology are: the removal effect of chloride ions is poor, which cannot meet the requirements of the production process; the loss of manganese resources is relatively large, which increases the production cost; a large amount of waste water cannot be treated, and the production process does not conform to the national environmental protection policy requirements, leading to the crisis of bankruptcy of production enterprises

Method used

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  • Method for removing chloride ions in electrolytic manganese solution

Examples

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Effect test

Embodiment 1

[0032] Example 1, 17 grams of R-Bi 2 O 3 Type chlorine removal agent is added to 68g of electrolytic manganese anode solution with 35g / l sulfuric acid content, start the stirrer, stir for 20 minutes to slurry, adjust the PH value of the slurry reaction end point with dilute sulfuric acid to 2, and add 1000 ml of slurry In the electrolytic manganese solution with chloride ion content of 1160 mg / L to be treated, fully stir for 60 minutes at 52°C at a stirring rate of 60 revolutions / minute, adjust the pH value of the chlorine removal reaction end point to 4.6 with dilute sulfuric acid, and filter ; The chloride ion content in the filtrate is 87 g / L, and the chlorine removal rate is 92.5%.

Embodiment 2

[0033] Example 2, 18 grams of R-Bi 2 O 3 Type dechlorination agent is added to 90g sulfuric acid content of 40g / l electrolytic manganese anode solution, start the stirrer, stir for 25 minutes to slurry, adjust the PH value of the slurry reaction end point with dilute sulfuric acid to 3, and add 1000 ml of slurry In the electrolytic manganese solution with a chloride ion content of 1230 mg / L to be treated, fully stir for 45 minutes at 55°C at a stirring rate of 60 revolutions per minute, adjust the pH value of the end point of the dechlorination reaction with dilute sulfuric acid to 4.8, and filter ; The chloride ion content in the filtrate is 71.34 g / L, and the chlorine removal rate is 94.2%.

Embodiment 3

[0034] Example 3, 11 grams of R-Bi 2 O 3 Type dechlorination agent is added to 66g of electrolytic manganese anode solution with sulfuric acid content of 30g / l, start the stirrer, stir for 30 minutes to slurry, adjust the PH value of the slurry reaction end point with dilute sulfuric acid to 1, and add 1000 ml of slurry In the electrolytic manganese solution with a chloride ion content of 863 g / L to be treated, fully stir for 55 minutes at 51°C at a stirring rate of 60 rpm, and adjust the pH value of the end point of the dechlorination reaction to 4.4 with dilute sulfuric acid. The filtrate The chloride ion content is 100.11 g / L, and the chlorine removal rate is 88.4%.

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Abstract

The invention discloses a method for removing chloride ions in an electrolytic manganese solution. An R-Bi2O3 antichlor is added in an electrolytic manganese anode solution with the sulfur acid content being 30-40 g / l, stirring is conducted for 20-30 min, slurrying is conducted, slurry is added in a to-be-treated electrolytic manganese solution, and after sufficient stirring is conducted for 40-60min at the temperature ranging from 40 DEG C to 60 DEG C and with the stirring rate being 60 r / min, filtering is conducted; filter liquor is injected into a qualified liquid system, and metal manganese is obtained through electrolysis; R in the R-Bi2O3 antichlor is silicon dioxide and manganese oxide, and the adding mass of the R-Bi2O3 antichlor is 10-15 times of the mass of the chloride ions inthe electrolytic manganese solution; and removed filter slag is sequentially subjected to washing and filtering, the removed chloride slag is subjected to alkaline washing for dissolving and dechlorinating through alkaline liquor, filtering is conducted, the filter slag obtained after filtering is sequentially washed and filtered and then is added in a chloride slag removing acidification tank tobe recycled. By means of the method, chloride can be effectively and rapidly removed, the antichlor can be circularly reutilized, and cost is low.

Description

Technical field [0001] The invention belongs to the technical field of manganese wet smelting, and relates to a method for removing chloride ions in an electrolytic manganese solution. Background technique [0002] Because manganese ore contains a certain amount of chlorine, in the process of manganese leaching to prepare the solution, the traditional liquid preparation process cannot separate these chloride ions. The entry of chloride ions into the electrolyte will affect the entire electrolysis process. The harm caused by chloride ions in the solution: (1) It affects the quality of the product and produces chlorine gas and deteriorates the operating environment; (2) It causes corrosion and damage to the lead-based anode plate. When the chloride ion concentration reaches 200mg / L, the lead-based anode plate begins to have Obvious convex-concave corrosion; when the chloride ion concentration reaches 300mg / L or more, the lead-based anode plate surface is corroded severely, the thic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B47/00C22B3/44
CPCY02P10/20
Inventor 李海东曹德忠
Owner 曹德忠
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