Leaching method capable of reducing leached acid consumption of uranium ores
A uranium ore and leaching technology, applied in the field of leaching to reduce the acid consumption of uranium ore leaching, can solve the problems of uranium metal loss, increase the ore treatment process in the beneficiation method, and increase the cost of ore treatment, so as to reduce the treatment cost, reduce the dissolution rate, Effect of reducing acid consumption in ore leaching
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[0019] Example 1
[0020] A heap leaching method is used to leaching a certain uranium ore. The method includes the following steps:
[0021] (1) Pretreatment of uranium ore: crush the uranium ore to -10mm;
[0022] (2) Acidification period: Use sulfuric acid solution to leaching the above-mentioned uranium ore, sulfuric acid concentration is 10g / L, continuous spraying sulfuric acid solution, spray intensity 30L / (m 2 .h), the spraying time is 10 days;
[0023] (3) Early stage of leaching: prepare a mixed solution of sulfuric acid and polyferric aluminum sulfate as the leaching agent. The concentration of sulfuric acid in the mixed solution is 8g / L, and the amount of polyferric aluminum sulfate added is controlled to make Fe in the mixed solution. 3+ The concentration is 5g / L, Al 3+ The concentration is 0.5g / L; spray the mixed solution of sulfuric acid and polyferric aluminum sulfate at intervals, spray for 7 hours a day, spray for 40 days, and spray intensity 40L / (m 2 .h); The raw mate...
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[0026] Example 2
[0027] A heap leaching method is used to leaching a certain uranium ore. The method includes the following steps:
[0028] (1) Pretreatment of uranium ore: crush the uranium ore to -5mm;
[0029] (2) Acidification period: the above uranium ore is leached with sulfuric acid solution, the sulfuric acid concentration is 11.0g / L, and the sulfuric acid solution is continuously sprayed, and the spray intensity is 50L / (m 2 .h), the spraying time is 5 days;
[0030] (3) Early stage of leaching: prepare a mixed solution of sulfuric acid and polyferric aluminum sulfate as the leaching agent. The sulfuric acid concentration in the mixed solution is 10g / L, and the amount of polyferric aluminum sulfate added is controlled to make Fe in the mixed solution. 3+ The concentration is 8.0g / L, Al 3+ The concentration is 0.8g / L; the mixed solution of sulfuric acid and polyferric aluminum sulfate is sprayed intermittently, spraying for 5 hours a day, spraying for 20 days, spraying intensi...
Example Embodiment
[0032] Example 3
[0033] A heap leaching method is used to leaching a certain uranium ore. The method includes the following steps:
[0034] (1) Pretreatment of uranium ore: crush the uranium ore to -20mm;
[0035] (2) Acidification period: the above uranium ore is leached with sulfuric acid solution, the sulfuric acid concentration is 11g / L, and the sulfuric acid solution is continuously sprayed, and the spray intensity is 20L / (m 2 .h), spraying time is 20 days;
[0036] (3) Early stage of leaching: prepare a mixed solution of sulfuric acid and polyferric aluminum sulfate as the leaching agent. The concentration of sulfuric acid in the mixed solution is 5g / L, and the amount of polyferric aluminum sulfate added is controlled to make Fe in the mixed solution. 3+ The concentration is 3.0g / L, Al 3+ The concentration is 0.2g / L; spray the mixed solution of sulfuric acid and polyferric aluminum sulfate intermittently, spray for 10h every day, spray for 50 days, spray intensity 35L / (m 2 .h);...
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