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Manganese carbonate ore leaching method based on two-stage leaching

A technology of manganese carbonate ore and two-stage leaching, which is applied in the direction of improving process efficiency, etc., to achieve the effects of large production flexibility, improved leaching rate, and reduced times of entering and leaving the tank.

Active Publication Date: 2017-09-12
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-stage leaching

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Experimental program
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Effect test

Embodiment 1

[0047] a kind of like figure 1 Shown is based on the manganese carbonate ore leaching method of two-stage leaching, comprises the following steps:

[0048] (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 0.7t 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 50.2%, and the manganese content in the leaching slag is 19.5%;

[0049] (2) After the leaching is finished, the remaining acid in the detection reaction is 1g / L, and the neutralizing agent ammonia water is added according to the concentration of the remaining acid in the reaction to neutralize, and air is introduced to remove impurities;

[0050] (3) Use a thickener to carry out liquid-solid separation of the pulp after impurity removal in step (2), wherein the solution obtained is an electrolytic qualified...

Embodiment 2

[0062] a kind of like figure 1 Shown is based on the manganese carbonate ore leaching method of two-stage leaching, comprises the following steps:

[0063] (1) Grind 50t of high-grade manganese carbonate ore (imported ore, see the above table 1 for its grade), put it into the reaction tank, add 11.5t 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 61.3%, and the manganese content in the leaching slag is 16.8%;

[0064] (2) After the leaching ends, the detection of residual acid in reaction is 2g / L, and according to the concentration of residual acid in reaction, artificially synthesized manganese carbonate slurry and ammonia are added for neutralization, and air is introduced to remove impurities;

[0065] (3) The ore pulp after impurity removal in step (2) is carried out liquid-solid separation using a thickener, wherein the solution obtained is an electrolyti...

Embodiment 3

[0071] a kind of like figure 1 Shown is based on the manganese carbonate ore leaching method of two-stage leaching, comprises the following steps:

[0072] (1) Grind 40t of high-grade manganese carbonate ore (imported ore, see the above table 1 for its grade) into the reaction tank, add 12.8t 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 84.75%, and the manganese content of the leaching slag is 8.6%;

[0073] (2) After the leaching is finished, it is detected that the residual acid in the reaction is 4g / L. According to the concentration of the residual acid in the reaction, artificially synthesized manganese carbonate slurry, double fly powder and ammonia water are added for neutralization, and air is introduced to remove impurities;

[0074] (3) The ore pulp after removing impurities in step (2) is separated from liquid and solid by pressure filtration, wher...

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Abstract

A manganese carbonate ore leaching method based on two sections of leaching, provided by the invention, comprises the following steps: adding high-grade manganese carbonate ore ground powder into a reactor, then adding anolyte and concentrated sulfuric acid and carrying out front-section leaching reaction for at least two hours; detecting residual acid left after reaction, accordingly adding a neutralizer to carry out neutralization, and introducing air to remove impurities; carrying out solid-liquid separation on ore pulp from which impurities are removed, then, putting one section of solids, obtained, into the reactor, adding concentrated sulfuric acid and anolyte, and carrying out leaching reaction for at least two hours; then, adding low-grade manganese carbonate ore powder, anolyte and concentrated sulfuric acid so as to carry out neutralization and leaching; finally adding a neutralizer, and introducing air to remove impurities; and carrying out solid-liquid separation on ore pulp from which impurities are removed so as to obtain an electrolysis qualified solution and solid residues. The method has the advantages of being low in residue quantity, 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 Patents(China)
IPC IPC(8): C22B3/08C22B47/00
CPCY02P10/20
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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