Green smelting method based on rhodochrosite leaching-purification

A smelting method and rhodochrosite technology, applied in the field of manganese metallurgy, can solve the problems of long leaching and purification process, low technical and economic indicators, large consumption of chemicals, etc., and achieve high impurity removal depth, good technical and economic indicators, and raw materials. low cost effect

Inactive Publication Date: 2021-12-03
AKETAO KEBANG MANGANESE IND MFG CO LTD +1
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Problems solved by technology

Secondary impurity removal can obtain high-quality leachate, but it needs to invest in chemicals and the cost is high
Therefore, the existing leaching and purification process of rhodochrosite is relatively long, the loss of manganese is large, and the consumption of chemicals is large, which makes the technical and economic indicators of the traditional manganese smelting process not high. The industry urgently needs to develop green and efficient manganese smelting production technology

Method used

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  • Green smelting method based on rhodochrosite leaching-purification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] One-stage leaching: add 1.05t rhodochrosite powder (Mn:27.69%, Fe:1.32%, Al:1.87%, SiO2:.10.76%), 3.5 kg white carbon black (-500 mesh) and 1.5m3 water, then start stirring, and add 6.1m3 of acidic leaching solution with a pH of 1.1 into the reactor at a feed rate of 5 m3 / h, and control the end point pH to 5.1. After the addition was complete, the stirring reaction was continued for 60 min, and then a section of leachate and a section of leach residue were obtained by filtration. Sampling and detection of the leach solution of the first stage showed that the concentrations of iron, aluminum and silicon in the leach solution of the first stage were 1.1, 36.6, and 22.7mg / L respectively, and the Mn content in the leaching residue of the first stage was 15.77%.

[0032] Second-stage leaching: Add 3.25 t of first-stage leaching residue (H2O:38%) and 1.5kg of white carbon black (-500 mesh) as seeds in the reactor, then start stirring, and put 6.5 m3 sulfuric acid acidity of 7...

Embodiment 2

[0034] One-stage leaching: add 0.96t rhodochrosite powder (Mn:27.69%, Fe:1.32%, Al:1.87%, SiO2:.10.76%), 1.8 kg white carbon black (-800 mesh) and 1.2m3 water, then start stirring, and add 7.2m3 of acidic leaching solution with a pH of 1.3 into the reactor at a feed rate of 8 m3 / h, and control the final pH to 4.8. After the addition was completed, the stirring reaction was continued for 45 min, and then a section of leachate and a section of leach residue were obtained by filtration. Sampling and testing of the first-stage leachate showed that the iron, aluminum, and silicon concentrations in the first-stage leachate were 1.1, 41.4, and 25.4 mg / L, respectively, and the Mn content in the first-stage leach residue was 13.88%.

[0035] Second-stage leaching: Add 2.86 t of first-stage leaching residue (H2O:38%) and 0.9kg of white carbon black (-800 mesh) as seed crystals in the reactor, then start stirring, and put 6.1 m3 of sulfuric acid acidity 75g / L anode The mixture of liquid...

Embodiment 3

[0037]One-stage leaching: add 1.15t rhodochrosite powder (Mn:27.69%, Fe:1.32%, Al:1.87%, SiO2:.10.76%), 4.2 kg white carbon black (-500 mesh) and 1.8m3 water, then start stirring, and add 5.5m3 of acidic leaching solution with a pH of 1.3 into the reactor at a feed rate of 5m3 / h, and control the end point pH to 5.5. After the addition was complete, the stirring reaction was continued for 75 min, and then a section of leaching solution and a section of leaching residue were obtained by filtration. Sampling and detection of the leach solution of the first stage showed that the concentrations of iron, aluminum and silicon in the leach solution of the first stage were 0.2, 7.6, and 3.2 mg / L respectively, and the Mn content in the leaching residue of the first stage was 18.21%.

[0038] Second-stage leaching: Add 3.04 t of first-stage leaching residue (H2O:39%) and 2.4kg of white carbon black (-800 mesh) as seed crystals in the reactor, then start stirring, and put 8.1 m3 of sulfur...

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Abstract

The invention belongs to the field of manganese metallurgy, and particularly discloses a green smelting method based on rhodochrosite leaching-purification. The method adopts a two-stage reverse feeding countercurrent leaching process, namely in the first-stage leaching process, rhodochrosite slurry is used as a base solution, anolyte, sulfuric acid solution or acid leaching solution is added into the base solution, the terminal pH is controlled to be greater than or equal to 4.5, and the manganese leachate with low impurity content can be obtained; in the second-stage leaching process, first-stage leaching residues serve as raw materials, anolyte or sulfuric acid solution is added into the first-stage leaching residues, the terminal pH is controlled to be smaller than or equal to 1.5, so that manganese in the first-stage leaching residues is thoroughly extracted, second-stage leaching residues low in manganese content and acid leaching liquid are obtained, the acid leaching liquid is returned to the first-stage to be used for leaching, and the second-stage leaching residues are washed and then sent to a residue field to be piled up or serve as mine filling materials; and through the leaching process, the separation of impurities can be realized, the manganese resource can be fully utilized, and the consumption of acid and alkali is reduced. The method has the advantages of simple process, low cost, high manganese recovery rate, low auxiliary material consumption and the like, and has a good industrial application prospect.

Description

technical field [0001] The invention belongs to the field of manganese metallurgy, in particular to a green smelting method based on rhodochrosite leaching-purification. Background technique [0002] Manganese is an important metal element, widely used in ferrous metals, non-ferrous metals, aerospace, electronic technology, new energy materials, chemical industry, agriculture and other fields. Since manganese can effectively increase the strength of steel, eliminate the hot embrittlement effect of S and O on steel, and improve the thermal processing performance and cold embrittlement effect of steel, this makes about 90% of manganese in the world used in the steel industry. In addition, with the rapid rise of the new energy industry, the use of manganese in the field of new materials has increased rapidly, and it can be predicted that global manganese consumption will maintain strong demand in the future. At the same time, although my country's manganese resources are relat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B47/00C25C1/10C22B3/06
CPCC22B47/00C22B3/06C25C1/10Y02P10/20
Inventor 宫清颗李玉虎马晓磊刘强冯金龙王顺林曹才放陈小刚
Owner AKETAO KEBANG MANGANESE IND MFG CO LTD
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