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Method for reduction leaching of manganese oxide ore through cassava starch

A technology of cassava starch and manganese oxide ore is applied in the field of manganese metallurgy to achieve high efficiency, high manganese leaching rate and low cost

Inactive Publication Date: 2018-07-06
DAXIN MANGANESE MINE BRANCH OF CITIC DAMENG MINING IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing methods have some deficiencies and problems in terms of product quality, reducing agent source and cost, etc., and it is necessary to research and develop a new method of reducing and leaching more efficient manganese oxide ore to meet the urgent needs of electrolytic manganese production in my country

Method used

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  • Method for reduction leaching of manganese oxide ore through cassava starch

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Effect test

Embodiment 1

[0019] A method for reducing and leaching manganese oxide ore utilizing tapioca starch, comprising the steps of:

[0020] (1) Take concentrated sulfuric acid (A.R) and ammonium sulfate (A.R) to prepare a mixed solution with an initial acidity of 200g / L and an ammonium sulfate concentration of 100g / L, heat the mixed solution to 85°C, add tapioca starch, and The acid hydrolysis reaction was carried out under stirring at 85°C; the acid hydrolysis time was 2.5 hours; the amount of tapioca starch was based on tapioca starch: Mn in manganese oxide ore 4+ The mass ratio of the content is added in a ratio of 0.35;

[0021] (2) Grind the manganese oxide ore to 50 mesh to obtain manganese oxide ore powder. After the acid hydrolysis, add manganese oxide ore powder to the solution to control the liquid-solid mass ratio of the ore slurry to 8:1; leaching and stirring at 80°C for 3 hours , after the reaction, the manganese sulfate leaching solution was obtained by filtration and separation...

Embodiment 2

[0024] A method for reducing and leaching manganese oxide ore utilizing tapioca starch, comprising the steps of:

[0025] (1) Take concentrated sulfuric acid and ammonium sulfate to prepare a mixed solution with an initial acidity of 200g / L and an ammonium sulfate concentration of 100g / L, heat the mixed solution to 90°C, add tapioca starch, and carry out at 90°C under stirring Acid hydrolysis reaction; acid hydrolysis time 2 hours; the consumption of tapioca starch is according to tapioca starch: Mn in manganese oxide ore 4+ The mass ratio of the content is added in a ratio of 0.40;

[0026] (2) Grind manganese oxide ore to 100 mesh to obtain manganese oxide ore powder. After acid hydrolysis, add manganese oxide ore powder to the solution to control the liquid-solid mass ratio of ore slurry to 9:1; leaching and stirring at 90°C for 2.5 hours , after the reaction, the manganese sulfate leaching solution was obtained by filtration and separation; the leaching rate of manganese ...

Embodiment 3

[0028] A method for reducing and leaching manganese oxide ore utilizing tapioca starch, comprising the steps of:

[0029] (1) Take concentrated sulfuric acid and ammonium sulfate to prepare a mixed solution with an initial acidity of 200g / L and an ammonium sulfate concentration of 100g / L, heat the mixed solution to 95°C, add tapioca starch, and carry out at 95°C under stirring Acid hydrolysis reaction; acid hydrolysis time 1.5 hours; the amount of tapioca starch is according to tapioca starch: Mn in manganese oxide ore 4+ The mass ratio of the content is added in a ratio of 0.41;

[0030](2) Crush the manganese oxide ore to more than 50 meshes to obtain manganese oxide ore powder. After the acid hydrolysis, add manganese oxide ore powder into the solution to control the liquid-solid mass ratio of the slurry to 10:1; leaching and stirring at 95°C for reaction 2 hour, after the reaction was finished, the manganese sulfate leaching solution was obtained by filtration and separat...

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Abstract

The invention belongs to the technical field of manganese metallurgy, and particularly relates to a method for reduction leaching of manganese oxide ore through cassava starch. According to the method, the cassava starch is used as a reducing agent, and reduction leaching of the manganese oxide ore is achieved in a sulfuric acid water solution medium. By adoption of the method, reduction leachingof the manganese oxide ore is conducted, the adopted cassava starch is low in cost and wide in source, the leaching cost is reduced, the manganese oxide ore is high in reduction leaching speed, high in efficiency and high in manganese leaching rate, and the manganese leaching rate reaches 92% or above. Lixivium obtained by adopting the method for reduction leaching of the manganese oxide ore through the cassava starch is small in impurity content, components are simple, and influences on the later electrolysis technology efficiency are weak.

Description

technical field [0001] The invention belongs to the technical field of manganese metallurgy, and in particular relates to a method for reducing and leaching manganese oxide ore with cassava starch. Background technique [0002] Manganese ore is one of the important basic raw materials in the industrial industry. In recent years, with the rapid growth of my country's iron and steel industry, the output of my country's manganese alloy and electrolytic manganese industry has ranked first in the world. As a strategic resource, manganese plays an important role in the national economy. has irreplaceable importance. But at present, a large number of electrolytic manganese industries mainly use manganese carbonate ore as raw material. With the rapid development of electrolytic manganese industry, the resource reserves and ore grade of manganese carbonate ore are declining, which greatly restricts the sustainable development of electrolytic manganese industry. Therefore, , the econom...

Claims

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Application Information

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IPC IPC(8): C22B47/00C22B3/16C22B3/08
CPCC22B47/00C22B3/08C22B3/1608
Inventor 杨勇谢彦韦旭甜何溯结闭伟宁许英鹏陈南雄方广盛廖英欢严超
Owner DAXIN MANGANESE MINE BRANCH OF CITIC DAMENG MINING IND
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