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Method for leaching manganese sulfate from low grade pyrolusite

A technology of pyrolusite and manganese sulfate, applied in electrolysis components, electrolysis process, etc., can solve the problems of complicated operation and high cost

Inactive Publication Date: 2012-02-22
CHONGQING UNIV
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Problems solved by technology

However, due to the addition of some reactants and more complicated steps, this improved method has the disadvantages of high cost and relatively complicated operation.

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  • Method for leaching manganese sulfate from low grade pyrolusite
  • Method for leaching manganese sulfate from low grade pyrolusite

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[0010] A method for leaching manganese sulfate with low-grade pyrolusite, the method comprising the steps of pulverizing low-grade pyrolusite and pyrite ore, and mixing them with sulfuric acid in a leaching tank to prepare ore slurry (1) . In the present invention, in the step (1), the mass fraction of manganese in the pyrolusite is 9% to 21%, the pyrite is flotation pyrite, and the particle size of the two ores is not greater than 0.150mm. The mass ratio of this pyrolusite and pyrite is 5~3: 1, the molar concentration of sulfuric acid is 1~1.2mol / L, and the mass ratio of sulfuric acid and two ores is 6~8: 1; After step (1), There are also the following steps:

[0011] (2) Turn on the power supply to the leaching tank in step (1) to perform electrocatalytic reduction reaction on the ore slurry; wherein, the anode current density is 100-300A / m 2 , the leaching temperature is 50-90°C, and the leaching time is 2-4h;

[0012] (3) Solid-liquid separation is performed on the ore ...

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Abstract

The invention provides a method for leaching manganese sulfate from low grade pyrolusite. The method comprises the steps of crushing low grade pyrolusite and pyrite, placing crushed pyrolusite and pyrite in a leaching tank and mixing crushed pyrolusite and pyrite with sulfuric acid to prepare ore slurry. According to the invention, the mass percentage of manganese in pyrolusite is 9% to 21%, the mass ratio of pyrolusite to pyrite is 5-3:1, the molar concentration of sulfuric acid is 1 to 1.2 mol / L, and the mass ratio of sulfuric acid to pyrolusite and pyrite is 6-8:1; electrocatalytic reinforcement is carried out on the ore slurry so as to accelerate a reduction reaction. The method for leaching manganese sulfate from poor pyrolusite provided in the invention has the advantages of low cost, easy operation, short time, a high leaching rate of manganese, etc.

Description

technical field [0001] The invention relates to a method for leaching manganese sulfate by a two-mine method using low-grade pyrolusite as raw material. Background technique [0002] Pyrolulurite is an important raw material for the production of manganese sulfate. The traditional process generally requires that the grade of pyrolusite is higher (the mass fraction of manganese must be at least 28%); its taste. In order to reduce the pollution caused by beneficiation and reduce the cost, people have developed some methods that can use low-grade pyrolusite to prepare manganese sulfate without beneficiation. For example, the two-mine method described in "Research on the Technology of Leaching Low-grade Pyrolulurite by Two-mine Method" is one of them {He Zhouchu et al. Research on the Technology of Leaching Low-grade Pyrolulurite by Two-mine Method[J]. China Manganese Industry, 2004 May, 22(2):35-37.}. This method uses low-grade pyrolusite with a mass fraction of manganese of...

Claims

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Application Information

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IPC IPC(8): C22B3/08C25B1/00C22B47/00
Inventor 陶长元孙思刘作华杜军范兴刘仁龙孙大贵杨鲜艳李敏陈燕习苏芸费珊珊王冰青张兴然
Owner CHONGQING UNIV
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