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A kind of manganese carbonate ore leaching method based on two-stage leaching

A manganese carbonate ore, two-stage leaching technology, applied in the field of hydrometallurgy of manganese carbonate ore, to achieve the effect of increasing the leaching rate, prolonging the service life of equipment, and reducing the dosage

Active Publication Date: 2017-11-17
CHANGSHA RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The above methods have been researched and explored the leaching process of ores containing manganese silicate, but there are still many deficiencies due to cost and equipment factors

Method used

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  • A kind of manganese carbonate ore leaching method based on two-stage leaching

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Kind of like figure 1 The leaching method of manganese carbonate ore based on two-stage leaching shown includes the following steps:

[0047] (1) After grinding 28t of high-grade manganese carbonate ore (imported ore, see Table 1 below for its grade), put it into the reaction tank, add 1t of concentrated sulfuric acid and 300m of anolyte 3 (See Table 2 for anolyte composition), the leaching reaction time is 2h, the ore leaching rate is 51.3%, and the manganese content of the leaching residue is 18.9%;

[0048] (2) After the leaching is finished, the residual acid in the reaction is detected to be 1.2g / L, and the neutralizing agent ammonia is added to neutralize it according to the concentration of the residual acid in the reaction;

[0049] (3) Use a thickener for liquid-solid separation of the neutralized pulp in step (2), separate the leachate and a section of solids of 20.05t (dry basis), and send the separated leachate (see Table 3 for composition analysis) to impurity rem...

Embodiment 2

[0069] Kind of like figure 1 The leaching method of manganese carbonate ore based on two-stage leaching shown includes the following steps:

[0070] (1) After grinding 50t of high-grade manganese carbonate ore (imported ore, whose grade is shown in Table 1 above), put it into the reaction tank, add 12t of concentrated sulfuric acid and 300m of anolyte 3 (See Table 2 for anolyte composition), the leaching reaction time is 4h, the ore leaching rate is 62.5%, and the manganese content of the leaching residue is 16.4%;

[0071] (2) After the leaching, the residual acid in the reaction was detected to be 2.1g / L, and the artificial manganese carbonate slurry and ammonia water were added to neutralize the residual acid according to the concentration of the residual acid in the reaction;

[0072] (3) The neutralized slurry in step (2) is separated into liquid and solid using a combination of thickener and filter press to separate the leachate and a section of solids 32.1t (dry basis), and th...

Embodiment 3

[0084] Kind of like figure 1 The leaching method of manganese carbonate ore based on two-stage leaching shown includes the following steps:

[0085] (1) After grinding 40t of high-grade manganese carbonate ore (imported ore, whose grade is shown in Table 1 above), put it into the reaction tank, add 13t of concentrated sulfuric acid and 300m of anolyte 3 (See Table 2 for anolyte composition), the leaching reaction time is 6h, the ore leaching rate is 85.02%, and the manganese content of the leaching residue is 8.5%;

[0086] (2) After the leaching is completed, the residual acid of the reaction is detected to be 4g / L, and the artificial manganese carbonate slurry, calcium carbonate and ammonia are sequentially added to neutralize the residual acid according to the concentration of the residual acid;

[0087] (3) The neutralized slurry in step (2) is separated from the liquid and solid by filter press, and the leachate (see Table 13 for composition analysis) and a section of solid 20t ...

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Abstract

The invention discloses a manganese carbonate ore leaching method based on two-section leaching. The method includes the following steps that high-grade manganese carbonate ore is ground into powder and added into a reactor; then, anode liquor and concentrated sulfuric acid are added for the first-section leaching reaction, wherein the leaching reaction time is at least 2 h; remaining acid left after the reaction is detected, and a neutralizer is added on this basis to conduct neutralization; solid-liquid separation is conducted on neutralized ore pulp, obtained first-section solid substances are thrown into the reactor, and concentrated sulfuric acid and anode liquor are added for second-section leaching, wherein the leaching reaction time is at least 2 h; impurity removal and solid-liquid separation are conducted on the obtained leaching agent to obtain qualified electrolysis liquid; low-grade manganese carbonate ore powder, anode liquid and concentrated sulfuric acid are added after the second-section leaching is finished to conduct neutralization leaching; and finally, adding a neutralizer again, and impurity removal is conducted; and solid-liquid separation is conducted on impurity-removed ore pulp to obtain qualified electrolysis liquid and solid residues. The method has the beneficial effects of being small in residue amount, high in leaching rate, low in sulfuric acid consumption, high in comprehensive recovery rate and the like.

Description

Technical field [0001] The invention belongs to the field of hydrometallurgy of manganese carbonate ore, and particularly relates to a method for leaching manganese carbonate ore. Background technique [0002] my country is rich in manganese ore resources, but with the rapid development of the manganese industry in recent years, the consumption of manganese ore has increased sharply. After years of over-exploitation, the grade of ore has dropped to 12% to 14%, and some ore has even dropped below 7%. High-quality and high-grade ore is almost exhausted. Purchasing high-grade ore by importing methods to replace low-grade ore commonly used in China can greatly reduce the cost of ore grinding and slagging. While reducing environmental protection pressure, it can increase the comprehensive recovery rate of metal manganese. It has greater economic value and Market potential (see Li Weijian, Application prospects of imported manganese ore in electrolytic metal manganese production, China...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B47/00C22B3/08
CPCC22B3/08C22B47/00
Inventor 叶万奇熊雪良何利民刘雪莹李重洋杨智唐三川
Owner CHANGSHA RES INST OF MINING & METALLURGY
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