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Method for producing manganese sulfate by high-temperature crystallization process

A technology of high-temperature crystallization and manganese sulfate, applied in the direction of manganese sulfate, etc., can solve the problems of high energy consumption, high production cost, and low manganese recovery rate, and achieve the effects of low energy consumption, low production cost and improved product quality

Inactive Publication Date: 2008-07-23
广西双德锰业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 2. High production cost and high energy consumption: 1.2-1.5 tons of coal is required to produce 1 ton of manganese sulfate;
[0006] 3. Low manganese recovery rate: the highest manganese recovery rate is only 60-65%

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: produce refining manganese sulfate solution with high temperature crystallization

[0025] Manganese sulfate solution with a content of 160g / L-200g / L, which is prepared by heating the slurry of manganese ore and pyrite, removing iron, removing heavy metals, neutralizing, and pressing, is prepared according to 80% of the total volume of the crystallization pot. %Pump into manganese sulfate solution for crystallization and purification:

[0026] Crystallization: Turn on the mixer to stir, the stirring speed of the crystallization pot is 30-64 rpm; turn on the heat source switch to heat the solution in the pot, the heating heat source can be saturated steam, superheated steam, oil furnace, electric heating tube heating, infrared heating and medium and high Frequency electromagnetic heating; when a large amount of steam is discharged from the vent valve port, close the vent valve and start timing, heat up to 100 ° C ~ 150 ° C, the heating time is controlled wi...

Embodiment 1

Embodiment 2

[0032] Embodiment 2: produce refining manganese sulfate solution with high temperature crystallization

[0033] When crystallizing, the stirring speed of the crystallization pot is 66-120 rpm; when the vent valve is closed and the timing is started, the temperature is raised to 151°C-210°C, and the heating time is controlled within 30-90 minutes. All the other processes are the same as in Example 1.

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PUM

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Abstract

The invention provides a method for producing high-purity manganese sulfate by adopting a high temperature crystallization method, which includes that the ore pulp of manganese ore and sulfurous iron ore is heated, removed of iron, removed of heavy metal, neutralized, pressure-filtered to obtain a manganese sulfate solution with the content of 160-200g / L, which is pumped to a manganese sulfate solution for carrying out crystallization and purification; the crystallization and purification includes crystallization, solid-liquid separation, dissolution, pressure filtration and other technologies; the pressure-filtered manganese sulfate solution can be crystallized and purified repeatedly as required. The invention can adopt a large amount of low-grade manganese ore with the manganese content of 10-20 percent as the raw material to produce the high-purity manganese sulfate solution and further deep process various high-purity manganese products, such as: electrolytic manganese dioxide, high-purity manganese carbonate, electronic grade mangano-manganic oxide and manganese monoxide, chemical manganese dioxide, industrial grade manganese sulfate monohydrate, chemical grade manganese sulfate monohydrate, medicine grade manganese sulfate monohydrate, food grade manganese sulfate monohydrate, analytically pure manganese sulfate monohydrate and so on.

Description

technical field [0001] The invention relates to a method for producing manganese sulfate, in particular to a method for producing high-purity manganese sulfate by a high-temperature crystallization method. The method can utilize the discarded low-grade manganese ore containing Mn10-20% to produce manganese sulfate. Background technique [0002] Manganese sulfate is used to process various manganese products such as: electrolytic manganese dioxide, high-purity manganese carbonate, electronic grade manganese tetraoxide, electronic grade manganese monoxide, chemical manganese dioxide, industrial grade manganese sulfate monohydrate, chemical grade one Manganese sulfate water, pharmaceutical grade manganese sulfate monohydrate, food grade manganese sulfate monohydrate, analytical pure manganese sulfate monohydrate, etc. The production method of the existing manganese sulfate solution is: use a crusher to crush the manganese ore to particles below 2mm, then use a wet mill to grind...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/10
Inventor 杜祖德
Owner 广西双德锰业有限公司
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