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
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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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