Leaching method of black shale uranium vanadium ore

[0048] A black shale uranium-vanadium ore contains 1.05% vanadium and 0.085% uranium, of which 82% vanadium exists in mica, and uranium mainly exists in the form of adsorption. The black shale uranium vanadium ore is processed by the following steps:

[0049] (1) Ore pretreatment: the ore is ground until the particle size is -60 mesh, adding 20wt% (in raw ore mass) sulfuric acid, 15wt% (in raw ore mass) water, and mixing uniformly;

[0050] (2) Ripening: After the materials are mixed and sealed, heat-preserve and ripen at 90°C for 24 hours.

[0051] (3) Leaching: add water to the material after aging in the above step (2), control the liquid-solid volume mass ratio to 1, and carry out leaching at 96°C, add inhibitor sodium sulfate 1.2wt% during the leaching process, and add calcium hydroxide to adjust the leaching The process pH is 1.66, the dosage of calcium hydroxide is 3.89wt%, and the leaching time is 2h.

[0052] (4) Filtration: the pulp after leaching in the above step (3

[0058] A black shale uranium-vanadium ore contains 0.946% vanadium and 0.080% uranium, of which 88% vanadium exists in mica, and uranium mainly exists in the form of adsorption. The black shale uranium vanadium ore is processed by the following steps:

[0059] (1) Ore pretreatment: grind the ore until the particle size is -100 mesh, add 12%wt (based on raw ore mass) sulfuric acid, 18%wt (based on raw ore mass) water, and mix well.

[0060] (2) Ripening: After the materials are mixed and sealed, heat-preserve and ripen at 93°C for 2.5 hours.

[0061] (3) Leaching: Add water to the material after aging in the above step (2), control the liquid-solid volume mass ratio to be 1, and carry out leaching at 90°C, add inhibitor sodium sulfate 1.5wt% (calculated as raw ore) during the leaching process, and add Calcium carbonate regulates the pH of the leaching process to be 1.32, the consumption of calcium carbonate is 4.10wt% (based on raw ore), and the leaching time is 1h.

[0062] (4)