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A kind of carbonate mineral leaching method
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A carbonate mineral and leaching technology, applied in the field of hydrometallurgy, can solve the problems of strong acid and sulfuric acid leaching agent, such as strong corrosiveness, long leaching time, and high leaching temperature, and achieve significant economic and environmental benefits, shorten leaching time, and equipment requirements. low effect
Active Publication Date: 2021-06-22
WUHAN UNIV OF TECH
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Although the above-mentioned process of leaching carbonate minerals by stirring with sulfuric acid can obtain a better leaching effect to a certain extent, the strong acid sulfuric acid leaching agent used is highly corrosive, requires high equipment, and the leaching time is long (2-6h). High temperature (above 50°C), there are still some problems in application
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Embodiment 1
[0029] A kind of carbonate mineral leaching method utilizes ferric sulfate solution to leach malachite, and the reaction route involved is as formula I,
[0031] Wherein the process flow chart of the present invention is shown in figure 1 , the specific implementation process is as follows:
[0032] 1) Crushing and grinding the malachite to obtain a powder, in which particles with a particle size of less than 0.45mm account for more than 85 wt%;
[0033] 2) Mix 1g of powder with 10mL ferric sulfate solution to obtain mixed pulp; wherein, Fe in ferric sulfate solution 3+ The concentration is 38.4g / L, and the molar ratio of Fe / Cu (Cu element to be leached in the powder) is controlled to be 0.8;
[0034] 3) Put the mixed pulp obtained in step 2) in the grinding tank of the ball mill, and perform mechanical activation and leaching under the ball milling conditions to obtain the leached...
Embodiment 2
[0039] A method for leaching carbonate minerals, utilizing ferric sulfate solution to leach smithsonite, the reaction route involved is as formula II,
[0041] Wherein the process flow chart of the present invention is shown in figure 1 , the specific implementation process is as follows:
[0042]1) crushing and grinding smithsonite to obtain a powder, in which particles with a particle size of less than 0.45mm account for more than 85 wt%;
[0043] 2) Mix 1.5g powder with 10mL ferric sulfate solution to obtain mixed pulp; wherein, Fe in ferric sulfate solution 3+ The concentration is 28.3g / L, and the molar ratio of Fe / Zn (the Zn element to be leached in the powder) is controlled to be 1.4;
[0044] 3) Put the mixed pulp obtained in step 2) in the grinding tank of the ball mill, and perform mechanical activation and leaching under the ball milling condition to obtain the leaching slurry; the m...
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Abstract
The invention discloses a carbonate mineral leaching method, comprising the following steps: crushing and grinding ore containing carbonate minerals to obtain powder; mixing the powder with iron sulfate solution to obtain mixed pulp; mixing the mixed pulp Put it in the grinding tank of a ball mill, perform mechanical activation and leaching under ball milling conditions to obtain a leach slurry; separate the leach slurry from solid to liquid to obtain a leach solution and a leach residue containing metalsulfate. The present invention can strengthen the leaching of carbonate minerals by using mechanical means under normal temperature conditions without auxiliary heating conditions, and can shorten the leaching time to 30-120 minutes, and the leaching rate of metal elements in carbonate minerals is 90 % or more; it has the characteristics of simple process flow, high leaching rate, low cost, and little pollution.
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