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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  • Abstract
  • Description
  • Claims
  • Application Information

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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 an

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

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Example Embodiment

[0018] Example 1

[0019] A method for reducing and leaching manganese oxide ore by using tapioca starch includes the following steps:

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

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

Example Embodiment

[0023] Example 2

[0024] A method for reducing and leaching manganese oxide ore by using tapioca starch includes the following steps:

[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. After the mixed solution is heated to 90°C, tapioca starch is added and the mixture is stirred at 90°C. Acidolysis reaction; acidolysis time is 2 hours; the amount of tapioca starch is based on tapioca starch: Mn in manganese oxide ore 4+ The mass ratio of the content is 0.40 to be added;

[0026] (2) Crush the manganese oxide ore to 100 meshes to obtain manganese oxide ore powder. After the acid hydrolysis, add manganese oxide ore powder to the solution to control the slurry-to-solid mass ratio to 9:1; leaching and stirring at 90°C for 2.5 hours After the reaction, the manganese sulfate leachate was separated by filtration; the manganese leaching rate was 97.22%. The mangane...

Example Embodiment

[0027] Example 3

[0028] A method for reducing and leaching manganese oxide ore by using tapioca starch includes the following steps:

[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. After the mixed solution is heated to 95°C, tapioca starch is added and the mixture is stirred at 95°C. Acidolysis reaction; acidolysis time 1.5 hours; the amount of tapioca starch is based on tapioca starch: Mn in manganese oxide ore 4+ The mass ratio of the content is 0.41.

[0030] (2) The manganese oxide ore is crushed to more than 50 meshes to obtain manganese oxide ore powder. After the acid hydrolysis, manganese oxide ore powder is added to the solution to control the slurry-to-solid mass ratio to 10:1; leaching and stirring reaction at 95℃ Hours, after the completion of the reaction, the manganese sulfate leachate was separated by filtration; the manganese leaching rat...

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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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