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Method of preparing manganomanganic oxide directly by manganese ore

A technology of trimanganese tetraoxide and manganese ore, applied in the direction of manganese oxide/manganese hydroxide, etc., can solve the problems of low manganese conversion rate, high cost, poor quality, etc., and achieve improved utilization rate, improved conversion rate, and increased sufficiency Effect

Inactive Publication Date: 2007-02-07
李忠红
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AI Technical Summary

Problems solved by technology

[0009] The present invention aims at the problems of low manganese conversion rate, high cost and relatively poor quality in the existing method for producing manganese tetraoxide with manganese ore or manganese sulfate, and provides a new method for producing manganese tetraoxide with manganese ore. The method of trimanganese oxide

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] Chin manganese ore (a kind of primary manganese ore) is crushed (100-200 mesh) and pyrite is leached with sulfuric acid, and the manganese sulfate solution is analyzed for the amount of heavy metals contained in it, and the amount of heavy metals (theoretical) is 2 times Add BaS to make lead, chromium, arsenic, cobalt, nickel and other heavy metals generate metal sulfide precipitates, and filter the precipitates; because the BaSO4 formed by the reaction has good crystallization and coarse particles, it plays a role in filtering in the sulfide slag. The slag is easy to filter. The reaction temperature is 60-80°C, and the reaction time is between 0.6-1.

[0018] Add ammonium fluoride in manganese sulfate solution subsequently, as the precipitation agent of calcium, magnesium, the addition of ammonium fluoride is 120% of calcium, magnesium (theoretical) content (obtained by laboratory analysis), reaction temperature 80-100 ℃, The reaction time is 0.6-1 hour.

[0019] Sod...

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Abstract

This invention provides a method for preparing manganese tetraoxide from manganese ore directly. Said method comprises leaching manganese ore by using sulfuric acid to obtain manganese sulfate solution and purifying by chemical impurity removal method, injecting the purified manganese sulfate solution into a sealed reactor, introducing ammonia gas and air into the reactor, precipitating to obtain manganese-containing mixture, pickling, drying, and calcining to obtain manganese tetraoxide. The cost to produce a ton of manganese tetraoxide by this method is around 9000 yuan. Further unique purification processes improve the purity of manganese sulfate solution, thereby improving the quality of manganese tetraoxide.

Description

technical field [0001] The invention relates to a preparation method of trimanganese tetraoxide, in particular to a method for directly preparing trimanganese tetraoxide from manganese ore. Background technique [0002] High-purity trimanganese tetraoxide is the main raw material for the production of high-quality soft ferrite. The soft ferrite made of it has a narrow remanence induction curve and can be magnetized repeatedly. At the same time, its high DC resistivity can avoid more eddy current losses. Therefore, it has a wide range of uses in electronics, electrical appliances, electric power and other industries. At present, many domestic magnetic material factories have replaced manganese carbonate with manganese tetraoxide as the raw material for producing soft ferrite. High-purity manganese manganese tetraoxide products have huge demand and very broad prospects in both domestic and international markets. [0003] Existing methods for preparing manganese tetraoxide ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/02
Inventor 李忠红
Owner 李忠红