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Method for preparing cell level manganese sulfate by reducing manganese ores at medium and low temperature

A manganese sulfate, battery-grade technology, applied in metallurgy and chemical industry, can solve the problems of high energy consumption, high impurity content, etc., and achieve the effect of low energy consumption, low temperature and easy price

Active Publication Date: 2019-01-18
广西锰华新能源科技发展有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of high energy consumption and high impurity content in the existing high-purity manganese sulfate production process, the present invention proposes a method for preparing battery-grade manganese sulfate by reducing manganese ore at a medium and low temperature, using biomass fuel to roast the manganese oxide ore at a medium and low temperature, saving energy Manganese monoxide is prepared by environmental protection reduction, and then the manganese monoxide is decontaminated by a compound rinse agent to remove most of the impurity ions such as sodium and potassium from the manganese monoxide, and then solid-liquid separation is carried out, and acid is added to the wet manganese monoxide Leaching and deep impurity removal, the method for preparing battery-grade manganese sulfate

Method used

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  • Method for preparing cell level manganese sulfate by reducing manganese ores at medium and low temperature

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1kg of Australian seed ore and 200g of biomass fuel taken from a manganese ore grinding plant in Guangxi were passed through 120 mesh, mixed evenly, put into a muffle furnace for roasting, roasted at 550°C for 80min, taken out, and naturally cooled to below 50°C;

[0024] Take out the manganese monoxide product, add 1L of water and 10g of composite rinse agent, stir for 30 minutes, and separate the solid and liquid; the composite rinse agent is composed of turpentine, polyacrylic acid, ethanol, and water in a weight ratio of 2:3:3:1;

[0025] Add 370ml of sulfuric acid and 3L of water to the wet product of manganese monoxide for leaching, adjust the pH to 5, and heat to 60°C;

[0026] Then add 15ml of ammonium sulfide and 2g of manganese fluoride and stir for 20 minutes, separate the solid and liquid to obtain a high-purity manganese sulfate liquid, then concentrate and dry to obtain a battery-grade manganese sulfate product.

Embodiment 2

[0028] 1kg of Gabon manganese ore and 150g of biomass fuel from a manganese ore grinding plant in Guangxi were passed through 150 meshes, mixed evenly, put into a muffle furnace for roasting, roasted at 600°C for 50min, taken out, and naturally cooled to below 50°C;

[0029] Take out the manganese monoxide product, add 1L of water and 15g of composite rinse agent, stir for 40 minutes, and separate the solid and liquid; the composite rinse agent is composed of turpentine, polyacrylic acid, ethanol, and water in a weight ratio of 2:3:3:1;

[0030] Add 360ml of sulfuric acid and 2.5L of water to the wet product of manganese monoxide for leaching, adjust the pH to 5, and heat to 60°C;

[0031] Then add 5ml of barium sulfide and 3g of manganese fluoride and stir for 20 minutes, separate the solid and liquid to obtain a high-purity manganese sulfate liquid, then concentrate and dry to obtain a battery-grade manganese sulfate product.

Embodiment 3

[0033] 1kg of local manganese ore and 100g of biomass fuel from a manganese ore grinding plant in Guangxi were passed through 100 meshes, mixed evenly, put into a muffle furnace for roasting, roasted at 600°C for 90 minutes, taken out, and naturally cooled to below 50°C;

[0034] Take out the manganese monoxide product, add 1.5L of water and 10g of composite rinse agent, stir for 20 minutes, and separate the solid and liquid; the composite rinse agent is composed of turpentine, polyacrylic acid, ethanol, and water in a weight ratio of 2:3:3:1 ;

[0035] Add 375ml of sulfuric acid and 3L of water to the wet product of manganese monoxide for leaching, adjust the pH to 6, and heat to 50°C;

[0036] Then add 5ml of ammonium sulfide and 5g of ammonium fluoride, stir for 30 minutes, and separate the solid and liquid to obtain a high-purity manganese sulfate liquid, which is then concentrated and dried to obtain a battery-grade manganese sulfate product.

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Abstract

The invention discloses a method for preparing cell level manganese sulfate by reducing manganese ores at medium and low temperature. The method specifically comprises the following steps that (1) manganese oxide ores and biomass fuel are smashed and levigated respectively, and then mixed uniformly at the weight proportion of 1000 : (100 to 200), so that a mixed material is obtained; (2) the mixedmaterial is calcinated for 50-90 minutes at the medium and low temperature of 550-600 DEG C, and then naturally cooled to be 50 DEG C or below under a sealing condition, so that a manganese monoxideproduct is obtained; (3) water and a compound rinsing agent are added into the manganese monoxide product at the proportion of 1000g : (1.0 to 1.5 L) : (10 to 15g), and stirred, and solid-liquid separation is conducted, so that a manganese monoxide wet product is obtained; and (4) water and sulphuric acid are added into the manganese monoxide wet product at the proportion of 1000g : (2.5-3.0L) : (360 to 375mL) to be subjected to a leaching reaction, the pH value of the mixture is regulated to 5-6, the mixture is heated, sulfide and fluoride are added in the mixture and stirred at the weight proportion of 1000 : (5 to 15) : (2 to 5), stirring is conducted, and solid-liquid separation is conducted to obtain high-purity manganese sulfate liquid, and then the high-purity manganese sulfate liquid is concentrated and dried to obtain the cell level manganese sulfate product.

Description

technical field [0001] The invention belongs to the technical field of metallurgy and chemical industry, and in particular relates to a method for preparing battery-grade manganese sulfate by reducing manganese ore at a medium and low temperature. Background technique [0002] Manganese sulfate is a widely used manganese salt product. At present, the existing mature production process is to use coal as a reducing agent, fire reduction to obtain manganese monoxide, acid leaching, then impurity removal, drying to obtain industrial grade, feed grade or battery grade manganese sulfate products. However, this process uses coal as the reducing agent, and the roasting reduction temperature is higher than 800°C, which results in high energy consumption, and it is difficult to meet the emission standards of sulfur dioxide, nitrogen oxides and other exhaust gases. [0003] With the development of domestic manganese monoxide production technology, the method of using biomass to reduce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/10
CPCC01G45/10C01P2006/80
Inventor 韦庆锰杨雄强莫燕娇张帆甘永兰李洁玉
Owner 广西锰华新能源科技发展有限公司
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