Method for preparing manganese sulfate by manganese oxide ore

A technology of manganese oxide ore and manganese sulfate, applied in the direction of manganese sulfate, etc., can solve problems such as difficulty in realizing industrial production, hindering the smooth progress of the reaction, and having no industrial application value, and achieves low price, improved recovery rate and leaching rate, and short reaction time Effect

Inactive Publication Date: 2008-04-09
汪云华 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, Fe(OH) 3 , basic ferric sulfate are colloidal substances, it is difficult to combine manganese sulfate with Fe(OH) 3 , basic ferric sulfate separation, and colloidal substances are easy to cover the surface of soft manganese minerals, hindering the smooth progress of the reaction; in order to prevent this reaction, the leaching reaction is usually controlled in an acidic medium; therefore, under neutral conditions, using oxidation Manganese ore reacts with ferric sulfate to prepare manganese sulfate. Although it can overcome the shortcomings of preparing manganese sulfate in acidic conditions, it is difficult to realize industrial production due to the above technical obstacles and has no industrial application value.
At present, there is no relevant literature report on the method of successfully producing manganese sulfate from manganese oxide ore under neutral conditions and making full use of the waste products.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Mix 120g ferromanganese ore (containing 22.47% manganese; 32.7% iron) and 330g ferrous sulfate heptahydrate, add 1.2L water, the temperature is 350°C, the pressure is 1MPa, the stirring speed is adjusted to 200 rpm, and react for 0.5 hours. The manganese leaching rate is up to 95%, and the slag grade TFe≥60%. The obtained manganese sulfate solution can meet the production requirements of electrolytic manganese, manganese dioxide, trimanganese tetraoxide and other products after removal of impurities by conventional methods, and can also be removed by conventional methods. After impurity, it is directly concentrated and crystallized, dried and sold as a product.

Embodiment 2

[0040] Mix 120g of ferromanganese ore (containing 22.47% manganese; 32.7% iron) and 18g of sulfur, add 550mL of water, the temperature is 180°C, the pressure is 20MPa, the stirring speed is adjusted to 200 rpm, and the reaction is carried out for 1.5 hours. The leaching rate is up to 90%, and the slag grade TFe is ≥ 45%. The manganese sulfate solution obtained can meet the production requirements of electrolytic manganese, manganese dioxide, trimanganese tetraoxide and other products after removing impurities by conventional methods, and can also remove impurities by conventional methods Afterwards, it is directly concentrated and crystallized, dried and sold as a product.

Embodiment 3

[0042] Mix 120g pyrolusite (containing 20.47% manganese; 8.7% iron) and 135g ferrous sulfate heptahydrate, add 0.5L water, the temperature is 160°C, the pressure is 0.7MPa, the stirring speed is adjusted to 200 rpm, and react for 3 hours. The manganese leaching rate is up to 72%, and the slag grade TFe is more than 50%. The obtained manganese sulfate solution can meet the production requirements of electrolytic manganese, manganese dioxide, trimanganese tetraoxide and other products after removal of impurities by conventional methods, and can also be removed by conventional methods. After impurity, it is directly concentrated and crystallized, dried and sold as a product.

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PUM

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Abstract

The invention provides a method for preparing manganese sulfate from manganese oxide ore. The method comprises the following processing steps: a, adding manganese oxide ore, ferrous sulfate or sulfur and water into a reactor; b, allowing for reaction; c, performing solid-liquid separation and slag washing to obtain iron concentrate and ready-to-use filtrate; d, removing impurities from the filtrate to get manganese sulfate solution. The extraction rate of manganese can exceed 85 percent. The manganese sulfate preparing method of the invention has the advantages of environment friendliness, short course and high manganese recovery, and can not only overcome problems of long course, low recovery, high cost, environmental pollution, etc. of traditional methods and significantly improve the recovery and extraction rate of manganese, but also utilize low grade manganese ore (iron-manganese ore in particular) and transform slag into products. The invention has prominent technological progress and outstanding substantial characteristics, and can produce excellent social and economic benefits.

Description

technical field [0001] The invention relates to a method for preparing manganese sulfate from manganese oxide ore, in particular to a method for preparing manganese sulfate from ferromanganese ore. Background technique [0002] Manganese sulfate is the main raw material for the preparation of manganese dioxide, trimanganese tetraoxide and electrolytic manganese. There are three main methods for preparing manganese sulfate with manganese ore reduction: [0003] 1. Coal reduction roasting - sulfuric acid leaching method. This method is a traditional production process, the technology is mature, and the quality of manganese sulfate is better; but SO 2 The flue gas is large, the dust pollution is serious, and the coal consumption is large. [0004] 2. Two ore roasting method. The manganese ore and pyrite are crushed and mixed separately, roasted at 500°C to 700°C for about 1 hour, and then leached with water or dilute sulfuric acid. This method also produces a large amount ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/10
Inventor 汪云华赖泳村关晓伟
Owner 汪云华
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