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Method for preparing manganese sulfate electrolyte by leaching pyrolusite through sulfur dioxide

A technology of sulfur dioxide and manganese dioxide, applied in the field of hydrometallurgy, can solve the problems of increasing production cost, being unfavorable to leaching of manganese ore, increasing the power consumption of slurry conveying in manganese leaching reactor, etc. The effect of improving the solid-liquid ratio

Active Publication Date: 2018-02-16
SICHUAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Taking pyrolusite with a manganese content of 25% as an example, when producing electrolytic manganese, the manganese content in the anolyte is 15-20g / L, and the manganese content in the new electrolytic solution is 35-40g / L, so the electrolyte preparation stage needs to produce The manganese content of the manganese ore is 20-25g / L, and the solid-liquid ratio (kg:L) is about 1:10. Such a low solid-liquid ratio is not conducive to the leaching of manganese ore, but also increases the volume of the manganese leaching reactor and the transportation of the slurry. Power consumption, increase production cost

Method used

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  • Method for preparing manganese sulfate electrolyte by leaching pyrolusite through sulfur dioxide
  • Method for preparing manganese sulfate electrolyte by leaching pyrolusite through sulfur dioxide
  • Method for preparing manganese sulfate electrolyte by leaching pyrolusite through sulfur dioxide

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Embodiment 1

[0045] In the present embodiment, utilize sulfur dioxide to leach pyrolusite to prepare electrolytic manganese, the anolyte in the step (1) is the anolyte that conventional sulfur dioxide leaches pyrolusite to prepare electrolytic manganese process electrolysis procedure, volume is 100m , manganese sulfate content in the anolyte ( Concentration) is 15g / L, ammonium sulfate content 125g / L, sulfuric acid concentration 40g / L, step (5) is used for the manganese content in the pyrolusite of leaching is 28.5% (mass percentage), manganese in the required qualified electrolyte of setting The content is 38g / L, the manganese recovery rate must be 80% in the whole process, according to Obtaining the required quality of pyrolusite is 10 tons, according to the ratio of the quality of pyrolusite to the volume of the anolyte used for pulping (solid-liquid ratio) is 1:3 (kg / L) pulping, then the required part A anode Liquid volume is 30m 3 .

[0046] Prepare the electrolyte solution as follo...

Embodiment 2

[0056] In this embodiment, the electrolytic manganese is prepared by leaching pyrolusite with sulfur dioxide, and the anolyte in step (1) is the anolyte produced in the electrolytic process of conventional sulfur dioxide leaching pyrolusite to prepare electrolytic manganese, with a volume of 100 m 3 , the manganese content is 17g / L in the anolyte, the ammonium sulfate content 120g / L, the sulfuric acid concentration 35g / L, the manganese content is 17.5% (mass percentage) in the pyrolusite that step (5) is used for leaching, set required qualified The manganese concentration in the electrolyte is 40g / L, and the manganese recovery rate is 82% in the whole process, according to The quality that obtains required pyrolusite is 16 tons, according to the ratio of the volume of pyrolusite quality and the anolyte that is used for mixing slurry is 1:2.5 (kg / L) mixes slurry, then required A part anolyte volume is 40m 3 .

[0057] (1) Anolyte distribution: Divide the anolyte produced in ...

Embodiment 3

[0066] In the present embodiment, the electrolytic manganese dioxide is prepared by leaching pyrolusite with sulfur dioxide, and the anolyte in step (1) is the anolyte produced in the electrolytic process of electrolytic manganese dioxide manganese process produced by conventional sulfur dioxide leaching pyrolusite, with a volume of 100 m 3 , manganese content is 35g / L in the anolyte, sulfuric acid concentration 35g / L, step (5) is used for the manganese content in the pyrolusite of leaching is 23.5% (mass percentage), and the manganese concentration is 55g / L in the qualified electrolyte, set The manganese recovery rate in the whole process is determined to be 85.0%, according to Obtaining the required quality of pyrolusite is 10 tons, according to the ratio of the quality of pyrolusite to the volume of the anolyte used for slurry preparation is 1:2 (kg / L) with slurry, then the required anolyte volume is 20m 3 .

[0067] Prepare the electrolyte solution as follows:

[0068](...

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Abstract

The invention provides a method for preparing a manganese sulfate electrolyte by leaching pyrolusite through sulfur dioxide. According to the main concept, the method comprises the steps that only a part of an anolyte and whole-process pyrolusite are used for preparing a fluid, and after the fluid reacts with the sulfur dioxide, a high-concentration manganese sulfate solution is obtained; after the other part of the anolyte is neutralized and subjected to liquid-solid separation, a low-concentration manganese sulfate solution with the manganese sulfate concentration being identical to that ofthe prior anolyte is obtained; and the two manganese sulfate solutions are blended to obtain the qualified electrolyte with the manganese sulfate concentration meeting electrolysis requirements. By adopting the method, the utilization efficiency of the sulfur dioxide and the pyrolusite in the leaching process can be improved, and the capital construction cost and operation cost of a leaching technology and a leachate impurity removing technology are lowered.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy of manganese-containing raw materials, and in particular relates to a method for preparing manganese sulfate electrolyte by leaching manganese in pyrolusite with sulfur dioxide. Background technique [0002] Electrolytic manganese is an important alloying element in the production of stainless steel, high-strength low-alloy steel, aluminum-manganese alloy, copper-manganese alloy, etc. Electrolytic manganese dioxide is an excellent depolarizer for batteries. Compared with dry batteries produced by natural discharge manganese dioxide, it has the characteristics of large discharge capacity, strong activity, small size, and long life. At present, electrolytic manganese and manganese dioxide are mainly obtained by electrolysis of manganese sulfate solution, so the preparation of qualified electrolyte is an important prerequisite for the production of high-quality electrolytic manganese and mang...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B47/00C22B3/08C22B3/46
CPCC22B3/08C22B3/46C22B47/00
Inventor 孙维义苏仕军丁桑岚
Owner SICHUAN UNIV
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