Method for producing battery-grade manganese sulfate and zinc sulfate with waste and used zinc-manganese batteries

A zinc-manganese battery, manganese sulfate technology, applied in the direction of zinc sulfate, manganese sulfate, improvement of process efficiency, etc., can solve the problems of incomplete utilization and low purity of manganese crystals.

Active Publication Date: 2018-03-20
蒋央芳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the purity of manganese crystals obtained by the current process is not high, and with the development of ternary battery materials, the demand for battery-grade manganese sulfate crystals is increasing,

Method used

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  • Method for producing battery-grade manganese sulfate and zinc sulfate with waste and used zinc-manganese batteries
  • Method for producing battery-grade manganese sulfate and zinc sulfate with waste and used zinc-manganese batteries
  • Method for producing battery-grade manganese sulfate and zinc sulfate with waste and used zinc-manganese batteries

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preparation example Construction

[0052] (4) Zinc-manganese separation and preparation of zinc sulfate, the solid-liquid separation of the material after removing iron and aluminum, to obtain the first filtrate and the first filter residue, the first filtrate is extracted with P204 organic extractant to separate zinc and manganese, first the P204 extractant With alkali saponification, the saponification rate is 50-70%. The P204 organic extractant is composed of 10-30% P204 extractant and 70-90% diluent sulfonated kerosene by volume fraction. The P204 organic extractant after saponification and the first The filtrate undergoes 6-10 stages of countercurrent extraction, 6-12 stages of washing, 4-8 stages of back extraction, and back extraction to obtain a pure zinc sulfate solution. The material liquid: acid washing: acid back: volume flow ratio of P204 organic extractant after saponification 3-5:0.5-1:0.1-0.3:1, sulfuric acid solution with acid washing concentration of 0.5-1mol / L, sulfuric acid solution with acid...

Embodiment 1

[0061] A method for producing battery-grade manganese sulfate and zinc sulfate from waste zinc-manganese batteries, comprising the following steps:

[0062] (1) The crushing of waste zinc-manganese batteries, put the zinc-manganese batteries into a crusher and crush them into powders with a particle size below 200um;

[0063] (2) For the dissolution of zinc-manganese battery powder, the zinc-manganese battery is added to the bottom water according to the solid-to-liquid ratio of 4:1, and acid is added to maintain the pH of the reaction process at 1.1, the reaction temperature is maintained at 85°C, and the stirring speed is 400r / min. After 3.5 hours, take a sample of the filter residue, detect its manganese content, add a reducing agent according to twice the mass of manganese in the filter residue, and react for 2 hours at pH 1.5, temperature 60°C, and stirring speed 400r / min, so that the zinc in the leaching residue Manganese content is reduced to below 0.5%;

[0064](3) To...

Embodiment 2

[0080] A method for producing battery-grade manganese sulfate and zinc sulfate from waste zinc-manganese batteries, comprising the following steps:

[0081] (1) The crushing of waste zinc-manganese batteries, put the zinc-manganese batteries into a crusher and crush them into powders with a particle size below 200um;

[0082] (2) For the dissolution of zinc-manganese battery powder, the zinc-manganese battery is added to the bottom water according to the solid-to-liquid ratio of 4:1, and acid is added to maintain the pH of the reaction process at 1.1, the reaction temperature is maintained at 85°C, and the stirring speed is 400r / min. After 3.5 hours, take a sample of the filter residue, detect its manganese content, add a reducing agent according to twice the mass of manganese in the filter residue, and react for 2 hours at pH 1.5, temperature 60°C, and stirring speed 400r / min, so that the zinc in the leaching residue Manganese content is reduced to below 0.5%;

[0083] (3) T...

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Abstract

The invention discloses a method for producing battery-grade manganese sulfate and zinc sulfate with waste and used zinc-manganese batteries and belongs to the technical field of waste and used battery utilization. The method comprises the steps that the waste and used zinc-manganese batteries are crushed, and the zinc-manganese batteries are placed into a crusher to be crushed into powder with the particle size being 200 microns or below; the zinc-manganese battery powder material is dissolved, and an acid and a reducing agent are added for dissolution; the pH is adjusted to remove iron and aluminum; zinc and manganese are separated, the zinc sulfate is prepared, and the zinc is extracted and separated through a P204 extraction agent; impurities are removed, a heavy metal trapping agent and fluoride are added, and heavy metal, calcium and magnesium are removed; a manganese sulfate solution is prepared, the manganese is extracted and separated through P507, then an obtained pure manganese solution is concentrated and crystallized, and the battery-grade manganese sulfate is obtained. By means of the method for producing the battery-grade manganese sulfate and the zinc sulfate with the waste and used zinc-manganese batteries, the battery-grade manganese sulfate and high-purity zinc sulfate crystals can be obtained, the obtained manganese sulfate crystals are in a particle shape and are free of the agglomeration phenomenon, the process is simple, and full-ingredient recycling is achieved.

Description

technical field [0001] The invention relates to a method for producing battery-grade manganese sulfate and zinc sulfate from waste zinc-manganese batteries, which belongs to the technical field of waste batteries. Background technique [0002] The zinc-manganese battery is a primary battery with manganese dioxide as the positive electrode, zinc as the negative electrode, and ammonium chloride aqueous solution as the main electrolyte. Commonly known as zinc-manganese battery, also known as alkaline dry battery, alkaline zinc-manganese battery, alkaline manganese battery, is the best performance variety in the zinc-manganese battery series. Suitable for large discharge and long-term use. The internal resistance of the battery is low, so the current generated is larger than that of ordinary manganese batteries, and the environmentally friendly mercury content is only 0.025%, which does not need to be recycled. Alkaline batteries are the most successful high-capacity dry batte...

Claims

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Application Information

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IPC IPC(8): C22B7/00C01G45/10C01G9/06
CPCC01G9/06C01G45/10C22B7/007Y02P10/20
Inventor 蒋央芳
Owner 蒋央芳
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