Method for removing chloride ions in electrolytic manganese solution

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

Inactive Publication Date: 2020-08-28
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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Comparison scheme
Effect test

Embodiment 1

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

Embodiment 2

[0033] Embodiment 2, with 18 grams of R-Bi 2 o 3 Add the type chlorine remover to 90g of electrolytic manganese anode solution with a sulfuric acid content of 40g / l, start the agitator, stir for 25 minutes to make a slurry, adjust the pH value of the slurry reaction end point to 3 with dilute sulfuric acid, and add the slurry to 1000 ml In the electrolytic manganese solution to be treated with a chloride ion content of 1230 mg / L, fully stir for 45 minutes at 55°C at a stirring rate of 60 rpm, adjust the pH value of the end point of the chlorine removal reaction to 4.8 with dilute sulfuric acid, and filter The chloride ion content is 71.34 grams per liter in the filtrate, and the removal rate of chlorine is 94.2%.

Embodiment 3

[0034] Embodiment 3, with 11 grams of R-Bi 2 o 3 Add the type dechlorination agent to 66g of the electrolytic manganese anode solution with a sulfuric acid content of 30g / l, start the agitator, stir for 30 minutes to make a slurry, adjust the pH value of the slurry reaction end point to 1 with dilute sulfuric acid, and add the slurry to 1000 ml In the electrolytic manganese solution to be treated with a chloride ion content of 863 g / L, fully stir for 55 minutes at a stirring rate of 60 rpm at 51° C., adjust the pH value at the end of the chlorine removal reaction to 4.4 with dilute sulfuric acid, and the filtrate The content of chlorine ion in the medium is 100.11 g / liter, and the removal rate of chlorine 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 hydrometallurgy and relates to a method for removing chloride ions in electrolytic manganese solution. Background technique [0002] Since 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, and the entry of chloride ions into the electrolyte will affect the entire electrolysis process. Electrolytic manganese The harm brought by chlorine ions in the solution: (1) affects product quality, produces chlorine gas and deteriorates the operating environment; (2) causes corrosion damage to the lead-based anode plate, when the concentration of chloride ions reaches 200mg / L, the lead-based anode plate begins to have Obvious convex and concave corrosion; when the concentration of chloride ions reaches 300mg / L or more, the surface of the lead-based anode plate is se...

Claims

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Application Information

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