Integrative method of two-stage acid leaching, washing and filter pressing for manganese powder pickle liquor

A manganese powder acid and immersion technology, which is applied in the direction of improving process efficiency, can solve the problems of surrounding water environment, soil environment pollution, practical processes that have not been produced and applied, and endangering the health of residents, etc. Realize the concept of cleaner production and improve the effect of resource utilization

Active Publication Date: 2010-12-01
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since about 30-35% of the electrolyte solution remains in the pressing, the concentration of manganese sulfate (calculated as manganese) is 30-36g/l, resulting in a higher loss of manganese in the manganese slag, which generally accounts for about 10% of the dry weight of the manganese slag At the same time, about 1.5-2.0% of the manganese carbonate in the manganese slag has not been converted into manganese sulfate in one stage of acid leaching, and only the filter press process, about 3.0-4.0% of the manganese in the manganese ore (accounting for the total manganese 18-25% of the volume) is not utilized
[000...

Method used

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  • Integrative method of two-stage acid leaching, washing and filter pressing for manganese powder pickle liquor
  • Integrative method of two-stage acid leaching, washing and filter pressing for manganese powder pickle liquor
  • Integrative method of two-stage acid leaching, washing and filter pressing for manganese powder pickle liquor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Open the pump 2 and the control valves 9, 10, 18, inject the manganese powder pickling solution directly into the diaphragm filter press 3, and the press filtrate flows into the filtrate pool 7, when the filter residue is completely filled with the filter plate of the entire diaphragm filter press 3 chamber, stop pump 2, close control valves 9, 10, 18;

[0034] (2) Open the pump 8, open the control valves 11, 12 and 15, inject the anolyte (the concentration of manganese is 12.6g / L, the concentration of sulfuric acid is 46g / L) into the membrane filter press 3, and the washing pressure is controlled at 0.1Mpa , carrying out two-stage acid leaching and circular washing, the anolyte washing water flows to the anolyte pool 4; after 5 minutes, the pump 8 and the control valves 11 and 12 are closed;

[0035] (3) Press filter the filter cake, close the control valve 15, and complete the operation.

[0036] The conclusion is as follows Table 1

[0037] Table 1: Data Analys...

Embodiment 2

[0040] (1) Open the pump 2 and the control valves 9, 10, 18, inject the manganese powder pickling solution directly into the diaphragm filter press 3, and the press filtrate flows into the filtrate pool 7, when the filter residue is completely filled with the filter plate of the entire diaphragm filter press 3 chamber, stop pump 2, close control valves 9, 10, 18;

[0041] (2) Open the pump 8, open the control valves 11, 12 and 15, inject the anolyte (the concentration of manganese is 12.7g / L, the concentration of sulfuric acid is 48g / L) into the membrane filter press 3, and the washing pressure is controlled at 0.28Mpa , carry out two-stage acid leaching and cycle washing, and the anolyte washing water flows to the anolyte pool 4; after 30 minutes, close the control valves 12 and 15;

[0042] (3) Open the control valves 13 and 16, inject the low-concentration manganese-containing solution (the manganese-containing concentration is 8g / L) into the diaphragm filter press 3, keep ...

Embodiment 3

[0049] (1) Open the pump 2 and the control valves 9, 10, 18, inject the manganese powder pickling solution directly into the diaphragm filter press 3, and the press filtrate flows into the filtrate pool 7, when the filter residue is completely filled with the filter plate of the entire diaphragm filter press 3 chamber, stop pump 2, close control valves 9, 10, 18;

[0050](2) Open the pump 8, open the control valves 11, 12 and 15, add sulfuric acid in the anolyte (concentration of manganese is 12.5g / L), so that the concentration of sulfuric acid in the anolyte is 60g / L; In the filter 3, the washing pressure is controlled at 0.6Mpa, and the two-stage acid leaching and one-time washing are carried out, and the anolyte washing water flows to the anolyte pool 4; after 120 minutes, the control valves 12 and 15 are closed;

[0051] (3) open control valve 13 and 16, add sulfuric acid in low-concentration manganese-containing solution (manganese-containing concentration is 8g / L), make ...

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Abstract

The invention relates to an integrative method of two-stage acid pickling, washing and filter pressing for manganese powder pickle liquor in a membrane filter press, which is applied to the processing procedures of manganese powder leaching and filter pressing in an electrolytic manganese metal industry. The method comprises the following steps: (1) feeding materials; (2) carrying out acid leaching and washing for anolyte at twice; (3) washing by circulating water; (4) washing by a solution with lower manganese concentration or clear water; and (5) carrying out the filter pressing for a filter cake to finish operation. The invention can reduce manganese carbonate content (calculation by manganese) in an original filter pressing technology for manganese residues in the electrolytic manganese metal industry from 1.5%-2.0% to below 0.6%; manganese sulfate (calculation by manganese) can be reduced to below 0.8% from 1.5%-2.0% and the recovery rate of the ammonium sulfate can reach above 50%. Based on cleaner production idea of controlling a source, the invention recovers the ammonium sulfate by reducing residuals of manganese resource in manganese slag, thus environmental risk of manganese slag landfill is greatly reduced and the utilization ratio of the manganese resource is increased by about 8-14%.

Description

technical field [0001] The invention relates to an integrated method of two-stage acid leaching, washing, and pressure filtration for manganese powder acid leaching liquid, specifically a method for integrating two-stage acid leaching, washing, and pressure filtration of manganese powder acid leaching liquid in a diaphragm filter press. Manganese powder leaching and pressure filtration treatment processes in the electrolytic manganese industry. Background technique [0002] my country is the largest producer of electrolytic manganese in the world, but the production process of electrolytic manganese is extensive, the equipment is outdated, and the degree of mechanical automation is low, resulting in a large amount of available manganese remaining in the manganese slag. The serious waste of manganese resources has accelerated the consumption of manganese resources in my country. At present, all our electrolytic manganese enterprises have not carried out two-stage acid leachin...

Claims

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Application Information

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IPC IPC(8): C22B47/00C22B3/06C22B3/08C22B3/22
CPCY02P10/20
Inventor 段宁潘涔轩王璠刘闺华周长波但智钢彭晓成朱春雷
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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