Preparation method of special electrolytic manganese dioxide for automobile power battery

A technology for electrolysis of manganese dioxide and automobile power batteries, which is applied in the directions of electrolysis components, electrolysis process, and process efficiency improvement, etc., can solve the problems of complicated and tedious preparation process, long preparation process time, poor method specificity, etc., so as to speed up the reaction. , Improve the efficiency of production process and reduce the effect of processing pressure

Active Publication Date: 2014-02-05
广西百色市德柳锰业有限公司
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  • Abstract
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the existing complex and cumbersome preparation process of electrolytic manganese dioxide for automobile power batteries, the pre...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] a. Manganese sulfate leaching: put manganese oxide ore powder, pyrite powder, and industrial sulfuric acid with a particle size of ≥150 mesh into the leaching reaction tank at a weight ratio of 10000g: 1000g: 2000g. The stirring speed is 80rpm and the temperature is 85 °C for 1.5 hours, then adjust the stirring speed to 60rpm, the temperature is 85 °C, and simultaneously feed sulfur dioxide SO 2 Gas, manganese oxide ore powder and sulfur dioxide SO 2 The ratio of gas feeding rate is 10000g:0.5mol, the reaction time is 1.0 hour, and the crude manganese sulfate solution is obtained by leaching. The manganese content of manganese oxide ore powder is 17%, and the effective sulfur content (weight ratio) in pyrite is 25%.

[0029] b, neutralization and removal of iron: under normal temperature conditions, add ammonium bicarbonate to the crude manganese sulfate solution slurry obtained in step a, and neutralize the residual H in the solution 2 SO 4 , so that the pH of the s...

Embodiment 2

[0035] a. Manganese sulfate leaching: put manganese oxide ore powder, pyrite powder, and industrial sulfuric acid with a particle size ≥ 150 meshes into the leaching reaction tank at a weight ratio of 10000g: 800g: 2200g. °C for 2 hours, then adjust the stirring speed to 70rpm and the temperature to 90 °C, while feeding sulfur dioxide SO 2 Gas, manganese oxide ore powder and sulfur dioxide SO 2 The ratio of gas feeding rate is 10000g:2.0mol, the reaction time is 1.2 hours, and the crude manganese sulfate solution is obtained by leaching. The manganese content of manganese oxide ore powder is 15.5%, and the effective sulfur content (weight ratio) in pyrite is 28%.

[0036] b, neutralization and iron removal: with the operation in embodiment 1.

[0037] c. Heavy metal impurity removal: the temperature of the crude manganese sulfate solution obtained in heating step b is raised to 90°C, and barium sulfide BaS and sodium sulfide Na are slowly added 2 The vulcanized mixture of S...

Embodiment 3

[0042] a. Manganese sulfate leaching: Put manganese oxide ore powder, pyrite powder, and industrial sulfuric acid with a particle size ≥150 mesh into the leaching reaction tank at a weight ratio of 10000g: 1200g: 1800g. The stirring speed is 120rpm and the temperature is 85 °C for 1.5 hours, then adjust the stirring speed to 70rpm, the temperature is 95 °C, and simultaneously feed sulfur dioxide SO 2 Gas, manganese oxide ore powder and sulfur dioxide SO 2 The ratio of gas feeding rate is 10000g:1.5mol, the reaction time is 1.5 hours, and the crude manganese sulfate solution is obtained by leaching. The manganese content of manganese oxide ore powder is 16.0%, and the effective sulfur content (weight ratio) in pyrite is more than 30%.

[0043] b, neutralization and iron removal: the same as the operating requirements in Example 1.

[0044] c. Heavy metal impurity removal: the temperature of the crude manganese sulfate solution obtained in heating step b is raised to 90°C, and...

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Abstract

The invention belongs to the field of battery material processing and specifically discloses a preparation method of a special electrolytic manganese dioxide for an automobile power battery. The preparation method comprises the following steps: performing manganese sulfate leaching, neutralizing and removing iron, removing impurities for heavy metals, electrolyzing and performing post-processing; manganese oxide mineral powder, pyrite powder and industrial sulphuric acid are soaked in the presence of SO2 to prepare crude manganese sulfate liquor; iron is removed by ammonium bicarbonate liquor; heavy metals are removed by utilizing barium sulphide; a manganese dioxide semi-finished product is obtained at a positive electrode through periodic electrolysis; the special electrolytic manganese dioxide for the automobile power battery is finally obtained by post-processing. According to the preparation method disclosed by the invention, the production process is simplified, the production process efficiency is improved, and the performance of obtained products is excellent, and finally, the production cost is lowered.

Description

technical field [0001] The invention belongs to the field of battery material processing, in particular to a method for preparing electrolytic manganese dioxide special for automobile power batteries by using low-grade manganese oxide ore under high temperature conditions. Background technique [0002] Electrolytic manganese dioxide for automotive power batteries is the raw material for the positive electrode material of lithium-ion rechargeable batteries. Lithium-ion battery cathode materials belong to the new energy and new material production fields supported by the state. Lithium manganese oxide, as a cathode material for lithium-ion batteries, has attracted the attention of many battery manufacturers at home and abroad in recent years as a lithium-ion cathode material with great potential due to its advantages of high performance, safety and low cost. With the acceleration of economic globalization, the pace of industrial restructuring, and the soaring oil prices i...

Claims

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Application Information

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IPC IPC(8): C22B3/08C22B3/44C25B1/21
CPCY02P10/20
Inventor 覃胜先吴元花许雄新陆云平黄绍锋张亮乐
Owner 广西百色市德柳锰业有限公司
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