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Method for carrying out reduction acidolysis-leaching and simultaneously removing iron to treat oxidized manganese ore

A technology for iron removal treatment and manganese ore oxidation, which is applied in the field of manganese metallurgy, can solve the problems of high leaching temperature and long time, and achieve the effects of increasing energy consumption, simplifying operation, and shortening the process flow

Inactive Publication Date: 2018-10-16
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Another object of the present invention is to improve the existing problems such as high leaching temperature and long time when the existing biomass directly leaches manganese oxide ore

Method used

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  • Method for carrying out reduction acidolysis-leaching and simultaneously removing iron to treat oxidized manganese ore

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Experimental program
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Effect test

Embodiment 1

[0027] The grade of manganese in the selected ore sample is about 20%, and the mass fraction of the ore crushed to less than 75 μm is not less than 85%. The reducing agent wood chips are obtained from local wood processing factories.

[0028] During reductive acid hydrolysis, firstly mix mineral powder and sawdust, then add water and concentrated sulfuric acid, stir well and put it in an incubator for aging for 14 hours. When feeding, the reducing agent / manganese ore mass ratio is controlled, the sulfuric acid / manganese ore mass ratio and the water / mineral ratio (ml / g) are respectively 0.3, 0.8, and 0.5.

[0029] Goethite method is used to remove iron during leaching and iron removal simultaneously. Mix the acid hydrolyzed material and calcium oxide thoroughly first, then add them to water in batches, control the pH of the solution to 2.5, stir and leaching at 90°C for 1.5h, the stirring speed is 300rpm, and the leaching liquid-solid ratio is 4. After leaching, solid-liquid ...

Embodiment 2

[0031] The manganese content in the selected ore sample is about 25%, and the mass fraction of the ore crushed to less than 75 μm is not less than 95%. The reducing agent wood chips are obtained from local wood processing factories.

[0032] During reductive acid hydrolysis, the ore powder and straw are fully mixed, and then water and concentrated sulfuric acid are added in sequence to control the mass ratio of reducing agent / manganese ore. The mass ratio of sulfuric acid / manganese ore and the water / mineral ratio (ml / g) are 0.35, 1.0, 1.0. After fully stirring, place it in a sealed box to age for 18 hours.

[0033] Goethite method is used to remove iron during leaching and iron removal simultaneously. First mix the acid hydrolyzed material and calcium oxide, then add it to water in batches, control the pH of the solution to 2.8, stir and leach at 95°C for 2 hours, the stirring speed is 300rpm, and the leaching liquid-solid ratio is 6. After leaching, solid-liquid separation...

Embodiment 3

[0036] The manganese content in the selected ore sample is about 25%, and the ore is crushed to a size smaller than 75 μm. The reducing agent wood chips are obtained from local wood processing factories.

[0037] During reductive acid hydrolysis, a certain amount of ore powder and sawdust are first mixed, then water and concentrated sulfuric acid are added in sequence to control the reducing agent / manganese ore mass ratio, the sulfuric acid / manganese ore mass ratio and the water / mineral ratio (ml / g) are respectively 0.4, 0.9, 0.8. After fully stirring, place it in an incubator to age for 16 hours.

[0038] Goethite method is used to remove iron during leaching and iron removal simultaneously. Mix the acid hydrolysis material and calcium oxide thoroughly first, then add them into water in batches, control the pH=2.6, stir and leach at 95°C for 2 hours, the stirring speed is 300rpm, and the leaching liquid-solid ratio is 5. After leaching, solid-liquid separation is carried o...

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Abstract

The invention belongs to the technical field of manganese metallurgy and discloses a method for carrying out reduction acidolysis-leaching and simultaneously removing iron to treat oxidized manganeseore. The method comprises the following steps of carrying out reduction acidolysis and leaching, and simultaneously removing the iron. According to the method, biomass waste such as wood dust, straw and the like is used as a reducing agent, so that the environment pollution is reduced, the waste is turned into wealth, and the production cost is reduced. By adopting reduction acidolysis technology,the biomass structure is destroyed by using concentrated sulfuric acid, so that cellulose, hemicelluloses and other substances are hydrolyzed into micromolecular reducing sugar and are used for reducing manganese ore. No heating is needed in the aging process, and the energy consumption is not increased. After aging, the high-valence manganese oxide is reduced to manganese sulfate and can be directly dissolved in water. When the acid solution is leached, the iron ore method is adopted to remove the iron, so that manganese is fed into the solution in the form of manganese sulfate, and the ironis precipitated out by using a goethite-shaped precipitate. The leaching and iron removal are combined together, so that the process flow can be shortened, the operation can be simplified, and the problems that the existing biomass is high in leaching temperature, long in time and the like when the manganese oxide ores are directly leached from the existing biomass are solved.

Description

technical field [0001] The invention belongs to the technical field of manganese metallurgy, and relates to a method for treating oxidized manganese ore by reducing acid hydrolysis and leaching while removing iron. Background technique [0002] Manganese is an important strategic resource, widely used in metallurgy, chemical industry, battery, agriculture and many other fields. With the increasing demand for manganese products in industrial production, high-grade manganese ore is increasingly depleted, and the rational use of low-grade manganese ore is the current research focus. Oxidized manganese ore cannot directly react with acid and alkali, and must be leached in a reducing system. Currently commonly used treatment methods include reduction roasting-leaching and direct reduction leaching. [0003] The traditional pyrometallurgical technology mostly uses coal as the reducing agent and roasts at 800-1000°C. The method is easy to operate, but due to the high calcination...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B47/00C22B3/08C22B3/44
CPCC22B3/08C22B3/44C22B47/00
Inventor 姜澜王德全付高峰孙洋蔡晓康刘龙
Owner NORTHEASTERN UNIV
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