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Method for preparing lead sulfate and mangano-manganic oxide materials from galena and pyrolusite

A manganese tetroxide material, pyrolusite technology, applied in the directions of lead sulfate, manganese oxide/manganese hydroxide, etc., can solve the problems of human health, environmental damage, high energy consumption, and achieve low cost, high purity and high efficiency. Effect

Inactive Publication Date: 2010-05-26
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process produces a large amount of SO 2 Gas, lead and lead compound dust cause damage to human health and the environment, and at the same time consume a lot of energy

Method used

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  • Method for preparing lead sulfate and mangano-manganic oxide materials from galena and pyrolusite
  • Method for preparing lead sulfate and mangano-manganic oxide materials from galena and pyrolusite
  • Method for preparing lead sulfate and mangano-manganic oxide materials from galena and pyrolusite

Examples

Experimental program
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Effect test

Embodiment 1

[0033] The galena concentrate from a lead-zinc mine in Yunnan is used, and the -0.074mm particle size accounts for 84.3%. The chemical composition is shown in Table 1.

[0034] Table 1 Galena Concentrate Chemical Composition (wt%)

[0035]

[0036] The -0.074mm particle size of pyrolusite accounts for 95.4%. The elemental analysis results of pyrolusite are listed in Table 2.

[0037] Table 2 pyrolusite elemental analysis (wt%)

[0038]

[0039] 1) The leaching process conditions are: mix galena, pyrolusite, water, and sodium chloride in a weight ratio of 1:1.6:4:2, and add a total amount of 0.375mol hydrochloric acid in stages in every liter of mixed solution; the reaction temperature The temperature is 75°C, the reaction time is 50 minutes, and the rotation speed of the stirrer is 500 rpm. The hydrochloric acid adopts the mode of adding in portions, and 80% hydrochloric acid by weight is added at the beginning of the reaction, and the remaining 20% ​​is added after th...

Embodiment 2

[0053] The galena concentrate from a lead-zinc mine in Guangdong was used, and the -0.074mm particle size accounted for 86.2%. The chemical composition is shown in Table 5.

[0054] Table 5 Galena Concentrate Chemical Composition (wt%)

[0055]

[0056] The particle size of -0.074mm in pyrolusite accounts for 96.1%. The elemental analysis results of pyrolusite are listed in Table 6.

[0057] Table 6 pyrolusite elemental analysis (wt%)

[0058]

[0059] 1) The leaching process conditions are: galena, pyrolusite, water, and sodium chloride are mixed in a weight ratio of 1: 1.6: 4: 2, and the hydrochloric acid that a total amount is 0.375mol is added in stages in every liter of mixed solution; the reaction temperature is 80°C, the reaction time is 60 minutes, and the rotation speed of the stirrer is 600 rpm. The hydrochloric acid adopts the mode of adding in portions, and 80% hydrochloric acid by weight is added at the beginning of the reaction, and the remaining 20% ​​is...

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Abstract

The invention discloses a method for preparing lead sulfate and mangano-manganic oxide materials from galena and pyrolusite. The method comprises the following steps of: using pyrolusite and ore concentrates of galena as materials, leaching lead and manganese by the oxidizability of the pyrolusite, purifying the lixivium, simultaneously cooling and diluting to obtain high-purity PbCl2 crystals, and adding sulfuric acid to the PbCl2 crystals to prepare PbSO4 powder; and for the manganese-contained solution with lead ions isolated, removing the lead, zinc and calcium ions to prepare the mangano-manganic oxide material. By using the selective natural ore concentrates of galena and pyrolusite to directly prepare the material, the invention uses the complementarity of the qualities of the galena and the pyrolusite to directly and simultaneously obtain electroactive materials for producing lead-acid accumulators, the lead sulfate and mangano-manganic oxide materials, thereby greatly reducing the production cost, enlarging the material source and having the characteristics of low cost and short process.

Description

technical field [0001] The invention belongs to the field of ore dressing, and relates to a method of using pyrolusite as an oxidizing agent raw material, adopting a two-mine method to leach galena concentrate, preparing lead sulfate as an electrode active material, and simultaneously obtaining manganic manganese tetraoxide. Background technique [0002] my country's primary lead minerals have the characteristics of large reserves, many lean ores, fine-grained particle size, and many symbiotic ores, so it is difficult to directly process and produce them. At present, the processing and utilization of lead minerals is the lead concentrate obtained by beneficiating primary lead minerals first, and then pyrometallurgy. More than 70% of the obtained lead metal is used in the field of lead-acid batteries to prepare lead oxide as the plate material. This process produces a large amount of SO 2 Gas, lead and lead compound dust cause damage to human health and the environment, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G21/20C01G45/02
Inventor 覃文庆徐本军张建文王军刘三军
Owner CENT SOUTH UNIV
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