Method for producing manganese sulphate by high temperature crystallization process

A technology of high temperature crystallization and manganese sulfate, applied in manganese sulfate and other directions, can solve the problems of large environmental pollution, low manganese recovery rate and high energy consumption, and achieve the effects of high manganese recovery rate, stable product quality and low energy consumption

Inactive Publication Date: 2006-07-19
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

[0008] 2. High energy consumption: 1.1-1.3 tons of coal is needed to produce 1 ton of manganese sulfate;
[0009] 3. Low recovery rate of manganese: the recovery rate of manganese is only 60-65%;
[0010] 4. Big envir

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment one: the method for producing manganese sulfate monohydrate with high temperature crystallization

[0032] Add the manganese sulfate solution prepared in the crystallization pot by 80% of the crystallization pot capacity, start the stirrer to stir, open the heat source valve (steam or heat transfer oil) or power switch (electric heating tube), the manganese sulfate solution is heated up, and the temperature rises to 152-245°C, after constant temperature for 5-55 minutes, open the drain valve to discharge part of the sewage in the crystallization pot, stop stirring after concentration, close the heat source valve or power switch to stop heating, and transfer the manganese sulfate solution in the crystallization pot to the Dissolve in the dissolving tank, open the agitator to stir, press filter after the manganese sulfate solution in the dissolving tank is all dissolved, pump the manganese sulfate solution into the standing tank and let stand for more than 36 ho...

Embodiment 2

[0033] Embodiment two: the method for producing anhydrous manganese sulfate with high temperature crystallization

[0034] After adjusting the pH value of the refined manganese sulfate solution to 2-3 with sulfuric acid, pump it into the crystallization pot according to the capacity of 80% of the crystallization pot, start the mixer to stir, open the heat source valve or power switch, and put the refined manganese sulfate solution at 20-80 Heating within minutes to 152-245°C, keeping the temperature constant for 5-55 minutes, then draining, and then turning on the mixer, turning on the heat source valve or power switch to heat, raising the temperature to 152-245°C, keeping the temperature at 5-55 minutes, and then separating the solid and liquid Anhydrous manganese sulfate. All the other processes are the same as in Example 1.

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PUM

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Abstract

The preparation method for manganese sulphate monohydrate by high temperature crystallization comprises: adding the manganese sulphate solution into crucible, stirring and heating to 152-245Deg, keeping for 5-55min; then, discharging some sewage, stopping stirring and heating, sending the solution to dissolution bath; after dissolving fully, pressure filtering, and keeping stable for more than 36h, pressure filtering again to obtain refined manganese sulphate solution; adjusting solution pH value to 2-3 with sulfuric acid, then pumping into crucible, stirring and heating to 152-199Deg within 20-80min, keeping for 5-55min, then discharging waste, and stirring again; heating to 152-199Deg and keeping for 5-55min, solid-liquid separating to obtain the final product. This invention has low energy consumption, high yield, no pollution to environment, and stable product quality.

Description

technical field [0001] The invention relates to a method for producing manganese sulfate, in particular to a method for producing manganese sulfate by high-temperature crystallization. Background technique [0002] Since the invention of dry batteries in 1868, manganese dioxide is the main positive electrode material of dry batteries, and its quality plays a decisive role in the performance of zinc-manganese dry batteries. [0003] Manganese dioxide used in dry batteries can be roughly divided into four categories: 1. Natural discharge manganese (NMD); 2. Active manganese dioxide (AMD); 3. Electrolytic manganese dioxide (EMD); 4. Chemical manganese dioxide ( CMD). [0004] Electrolytic manganese dioxide has a history of more than 60 years since its industrial production in 1940. Manganese dioxide produced by electrolysis can meet the quality requirements of high-capacity and high-power battery raw materials. Unfortunately, manganese dioxide produced by electrolysis has the...

Claims

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Application Information

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IPC IPC(8): C01G45/10
Inventor 杜祖德
Owner 广西双德锰业有限公司
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