A kind of method for vanadium extraction industrial acid wastewater treatment and valuable metal comprehensive recovery
A technology for acidic wastewater and valuable metals, applied in cement production, improvement of process efficiency, calcium/strontium/barium sulfate, etc. Process operation and other issues, to achieve the effects of easy filtration, reduced dosage and treatment costs, and low requirements for process equipment
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Embodiment 1
[0034] A method for the treatment of acidic wastewater in the vanadium extraction industry and the comprehensive recovery of valuable metals. The acidic wastewater to be treated is the adsorption residue of sulfuric acid leaching solution that is absorbed and enriched in vanadium by anion adsorption resin, which contains [V 2 o 5 ]0.05g / L, [P]0.29g / L, [SiO 2 ]0.16g / L, [Fe 3+ ]1.55g / L, [Fe 2+ ]0.009g / L, [Al 3+ ]4.16g / L, [Zn 2+ ]2.16g / L, [Cu 2+ ]0.15g / L, [Cr 3+ ]0.19g / L, [Ni 2+ ]0.095g / L, [Co 2+ ]0.025g / L, [Cd 2+ ] 0.085g / L, pH is 1.8. The method specifically includes the following steps:
[0035] (1) Add 3L of the above-mentioned acidic waste liquid into a 5L mixing tank, which has been oxidized before ion adsorption, and contains Fe 2+ Very low, no need to oxidize.
[0036] (2) Stir and slowly add limestone powder (-200 mesh), control the reaction pH=4.8, make it fully react at room temperature for 2 hours, consume 86.5g of limestone powder, vacuum filter the resul...
Embodiment 2
[0040] A method for the treatment of acidic wastewater in the vanadium extraction industry and the comprehensive recovery of valuable metals. The acidic wastewater to be treated is the raffinate obtained by extracting and enriching vanadium from the sulfuric acid leaching solution, which contains [V 2 o 5 ]0.05g / L, [P]0.29g / L, [SiO 2 ]0.16g / L, [Fe 3+ ]0.005g / L, [Fe 2+ ]4.19g / L, [Al 3+ ]4.16g / L, [Zn 2+ ]2.16g / L, [Cu 2+ ]0.15g / L, [Cr 3+ ]0.19g / L, [Ni 2+ ]0.095g / L, [Co 2+ ]0.025g / L, [Cd 2+ ] 0.085g / L, pH is 2.0. The method specifically includes the following steps:
[0041] (1) Add 3L of the above-mentioned acidic waste liquid into a 5L mixing tank. Due to the reduction before extraction, it contains Fe 2+ The concentration is higher, and the drum air aeration is used for oxidation for 6 hours.
[0042] (2) Stir while blowing in air, slowly add limestone powder (-200 mesh), control the reaction pH=4.8, make it fully react at room temperature for 4 hours, consume 105.5...
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