Method for preparing high-purity manganese sulfate from alabandite and product prepared according to method

A technology of manganese sulfate and pyromanganese ore, applied in the direction of manganese sulfate, etc., can solve the problems of high impurity content, failure to meet the technical index requirements of high-purity manganese sulfate, and low main content of the product, and achieve simple process, easy industrial scale production, and reduce The effect of the content of heavy metal impurities

Inactive Publication Date: 2018-06-29
衡阳市瑞麟锰业技术开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] my country's manganese sulfate production technology, whether it is wet method or fire method, produces products with low main content and high impurity content, which is far from meeting the above technical indicators of high-purity manganese sulfate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The method for preparing high-purity manganese sulfate and the product thereof with pyromanganite, the method steps are as follows:

[0040] The first step: mix pyromanganese ore powder and coal powder according to a certain ratio, and calcinate;

[0041] The second step: add 55% sulfuric acid, stir and react at about 85°C and 1.6 atmospheric pressure, and filter to obtain manganese sulfate solution;

[0042] Step 3: Cool the manganese sulfate solution to room temperature, precipitate calcium sulfate and magnesium sulfate crystals, and filter;

[0043] The fourth step, one-time crystallization: heat the manganese sulfate filtrate obtained in the third step with a heat source, evaporate water, concentrate the manganese sulfate concentration to 800g / L, let it stand, and precipitate manganese sulfate crystals, and centrifuge the precipitated manganese sulfate crystals with a centrifuge Dehydration and drying;

[0044] The fifth step, secondary crystallization: dissolve t...

Embodiment 2

[0047] The method for preparing high-purity manganese sulfate and the product thereof with pyromanganite, the method steps are as follows:

[0048] The first step: mix pyromanganese ore powder and coal powder according to a certain ratio, and calcinate;

[0049] The second step: add 44% sulfuric acid, stir and react at about 75°C and 1.4 atmospheric pressure, filter to obtain manganese sulfate solution;

[0050] Step 3: Cool the manganese sulfate solution to room temperature, precipitate calcium sulfate and magnesium sulfate crystals, and filter;

[0051] The fourth step, one-time crystallization: heat the manganese sulfate filtrate obtained in the third step with a heat source, evaporate the water, concentrate the manganese sulfate concentration to 600g / L, let it stand, and precipitate the manganese sulfate crystals, and centrifuge the precipitated manganese sulfate crystals with a centrifuge Dehydration and drying;

[0052]The fifth step, secondary crystallization: dissolv...

Embodiment 3

[0055] The method for preparing high-purity manganese sulfate and the product thereof with pyromanganite, the method steps are as follows:

[0056] Its method steps are as follows:

[0057] The first step: mix pyromanganese ore powder and coal powder according to a certain ratio, and calcinate;

[0058] The second step: add 50% sulfuric acid, stir and react at about 80°C and 1.5 atmospheric pressure, filter to obtain manganese sulfate solution;

[0059] Step 3: Cool the manganese sulfate solution to room temperature, precipitate calcium sulfate and magnesium sulfate crystals, and filter;

[0060] The fourth step, one-time crystallization: heat the manganese sulfate filtrate obtained in the third step with a heat source, evaporate water, concentrate the manganese sulfate concentration to 700g / L, let it stand, and precipitate manganese sulfate crystals, and centrifuge the precipitated manganese sulfate crystals with a centrifuge Dehydration and drying;

[0061] The fifth step...

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PUM

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Abstract

The invention discloses a method for preparing high-purity manganese sulfate from alabandite and a product prepared according to the method. The method comprises the following steps: I, calcining a raw material, and performing sulfuric acid leaching; II, performing decontamination; and III, performing purification, thereby obtaining the high-purity manganese sulfate. The method is simple in process, easy to operate, free of secondary environment pollution since a great amount of additive chemical reagents are not used in the preparation process, low in production cost and easy in on-scale industrial production; and the problem of heavy metal separation can be solved, the contents of heavy metal impurities of common manganese sulfate products can be remarkably reduced, and manganese sulfatewith very low metal impurities can be prepared.

Description

technical field [0001] The invention relates to a production method of chemical products, in particular to a method for preparing high-purity manganese sulfate from pyromanganese ore and the prepared product. Background technique [0002] Manganese sulfate is a traditional manganese salt product with a wide range of uses. At present, the domestic manganese sulfate production process mainly uses pyrolusite as raw material, and is divided into two reduction leaching technologies: carbon fire reduction and wet reduction (reducing agents such as pyrite, ferrous sulfate or titanium white waste acid) and acid leaching. Then carry out simple oxidation-hydrolysis iron removal, sulfuration removal of heavy metals, filtration, static precipitation, solution crystallization, centrifugal dehydration and drying, to obtain three grades of manganese sulfate products of industrial grade, feed grade or boutique grade, which are used for chemical fertilizers, Feed, paint, pesticide and other...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/10
CPCC01G45/10C01P2006/80
Inventor 周芳
Owner 衡阳市瑞麟锰业技术开发有限公司
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