Method for extracting rhenium from rhenium-rich concentrates
A technology of concentrated ore and oxygen-enriched air, which is applied in the direction of improving process efficiency, can solve the problems of unreported treatment, easy crystallization of calcium ions, unfavorable separation and purification, etc., to achieve industrial application, high recovery rate of rhenium, and good effect thorough effect
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[0055] Example 1:
[0056] (1) Oxygen-enriched roasting
[0057] Take 1 kg of rhenium-rich concentrate, the main components of the rhenium-rich concentrate: Re 3.5%, As 8%, Cu 13%, S 65%. The rhenium-rich concentrate and quicklime are mixed and ground to 100 mesh. The added amount of quicklime is 0.5 times the mass of the concentrate, that is, 0.5 kg. The mixture is added to the electric furnace, oxygen-enriched air is passed, the gas oxygen content volume ratio is 50%, the pressure is 0.3Mpa, and the gas consumption is 0.7Nm 3 , Calcination temperature 550℃, calcination time 6h.
[0058] (2) Water leaching
[0059] The roasted material is directly added to the reaction vessel, and leached with water slurry, the liquid-solid ratio is 5, the leaching temperature is 60°C, and the leaching time is 5h. After the leaching is completed, filter, solid-liquid separation, the solid residue with higher arsenic content is combined with the copper-arsenic filter cake for unified treatment. The...
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[0064] Example 2:
[0065] (1) Oxygen-enriched roasting
[0066] Take 1 kg of rich rhenium concentrate, the main components of rich rhenium concentrate: Re5.4%, As 10%, Cu 15%, S 59.7%. Mix and grind the rich rhenium concentrate with quicklime to 100 meshes. The added amount of quicklime is twice the mass of the concentrate, that is, 1 kg. The mixture is added to the electric furnace, oxygen-enriched air is passed, the gas oxygen content volume ratio is 70%, the pressure is 0.4Mpa, and the gas consumption is 0.6Nm 3 , Calcination temperature 700℃, calcination time 4h.
[0067] (2) Water leaching
[0068] The roasted materials are directly added to the reaction vessel, and leached with water slurry, the liquid-to-solid ratio is 5, the leaching temperature is 80°C, and the leaching time is 3h. After the leaching is completed, filter, solid-liquid separation, the solid residue with higher arsenic content is combined with the copper-arsenic filter cake for unified treatment. The main c...
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