Manganese carbonate ore leaching method based on two-section 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 leaching rate, high production flexibility, and prolonging the service life of equipment

Active Publication Date: 2016-03-30
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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  • Manganese carbonate ore leaching method based on two-section leaching

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Experimental program
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Effect test

Embodiment 1

[0046] a kind of like figure 1 Shown is based on the manganese carbonate ore leaching method of two-stage leaching, comprises 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 (The composition of the anolyte is shown in Table 2 below), the leaching reaction time is 2h, the ore leaching rate is 51.3%, and the manganese content in the leaching slag is 18.9%;

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

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

Embodiment 2

[0069] a kind of like figure 1 Shown is based on the manganese carbonate ore leaching method of two-stage leaching, comprises the following steps:

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

[0071] (2) After the leaching ends, the detection of residual acid in reaction is 2.1g / L, according to the concentration of residual acid in reaction, artificially synthesized manganese carbonate slurry and ammonia are added to neutralize residual acid;

[0072] (3) Use a thickener and a filter press combination to separate the liquid-solid from the neutralized pulp in step (2), separate the leachate and a section of solid matter 32.1t (dry basis...

Embodiment 3

[0084] a kind of like figure 1 Shown is based on the manganese carbonate ore leaching method of two-stage leaching, comprises the following steps:

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

[0086] (2) After the leaching ends, the residual acid in the detection reaction is 4g / L, and the artificially synthesized manganese carbonate slurry, calcium carbonate and ammonia are added to neutralize the residual acid in sequence according to the concentration of the residual acid in the reaction;

[0087] (3) Use pressure filtration to separate the liquid-solid from the neutralized pulp in step (2), separate the leachate (see Table 13 for co...

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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, in particular to a leaching method of 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 ore grade has dropped to 12% to 14%, and some ores have even dropped to below 7%. High-quality high-grade ore is almost exhausted. Purchasing high-grade ore through imports and other methods to replace low-grade ore commonly used in China can greatly reduce the cost of ore grinding and slag dumping, and can increase the comprehensive recovery rate of metal manganese while reducing environmental pressure, which has great economic value and Market potential (see Li Weijian, Application prospect of imported manganese ore in electrolytic manganese production, China Manganes...

Claims

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Application Information

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Patent Type & Authority Applications(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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