Method for preparing manganese sulfate by using low grade manganese mud

A technology of manganese slag and manganese sulfate, applied in manganese sulfate and other directions, can solve the problems of high production cost, high energy consumption, low manganese recovery rate, etc., and achieve the effect of low energy consumption and production cost

Inactive Publication Date: 2009-06-17
杜祖德
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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

Method used

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Embodiment Construction

[0016] Manganese sulfate solution with a content of 150g / L-200g / L, which is prepared by heating the slurry of manganese ore and pyrite, removing iron, removing heavy metals, neutralizing, and pressing, is calculated according to 70% of the total volume of the crystallization pot. -80% is pumped into manganese sulfate solution for crystallization and purification:

[0017] Crystallization: Turn on the mixer to stir, and the stirring speed of the crystallization pot is 30-60 rpm; turn on the heat source switch to heat the solution in the pot to 90°C~140°C, and the heating time is controlled within 30-80 minutes, and the constant temperature and pressure are 12- After 30 minutes, let it stand for 20-30 minutes, and then open the drain valve to drain;

[0018] Solid-liquid separation: after blowdown, close the blowdown valve, turn on the mixer again to stir, turn on the heat source switch, raise the temperature to 90°C~200°C, increase the pressure to 0.4Mpa~2.0Mpa, open the discha...

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Abstract

The invention provides a method for preparing manganese sulfate from low-grade manganese slag, which comprises: the slurry of manganese ore and the slurry of iron pyrite are subjected to heating reaction, iron removal, heavy metal removal, neutralization and pressure filtration to form a manganese solution of which the concentration is 150 to 200g/L; and the manganese solution is pumped for crystallization and purification. The crystallization and purification comprises crystallization, solid-liquid separation, dissolution, pressure filtration and so on. The method uses rich low-grade manganese ore containing 10 to 20 percent of manganese as a raw material to produce a high-purity manganese sulfate solution which is used for deep processing of various high-purity manganese products such as electrolytic manganese dioxide, high-purity manganese carbonate, electronic grade trimanganese tetroxide and manganese monoxide, chemical manganese dioxide, industrial manganese sulfate monohydrate, chemical manganese sulfate monohydrate, medical manganese sulfate monohydrate, food manganese sulfate monohydrate, and analytical pure manganese sulfate monohydrate.

Description

technical field [0001] The invention relates to a method for producing manganese sulfate, in particular to a method for producing manganese sulfate by using low-grade manganese slag. The method can produce manganese sulfate by using the low-grade manganese slag containing 10-20% Mn that was previously discarded. 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 th...

Claims

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Application Information

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IPC IPC(8): C01G45/10
Inventor 杜祖德
Owner 杜祖德
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