Process for abstracting vanadium from iron-smelting waste slag of vanadium -containing iron ore
A technology for vanadium iron ore and waste residue, which is applied in the field of vanadium extraction, can solve the problems of affecting the vanadium extraction rate, the purity of vanadium solution, difficulty in recycling and processing mother liquor, chlorine gas pollution, etc., and achieves the effects of shortening the number of extraction stages, improving the purity, and reducing environmental pollution.
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Embodiment 1
[0019] The vanadite ore ironmaking waste slag is leached with 4mol / L dilute sulfuric acid, the leaching temperature is 80°C, and the leaching time is 8h; the ethylene glycol is W (ethylene glycol): W (V 2 o 5 ) = 1:10 into the leaching solution, at a temperature of 40°C, the treatment time is 30 minutes; use the above-mentioned dilute sulfuric acid to adjust the pH value to 2.30-2.50, use P204, TBP and 260# solvent oil mixture (the volume of the three The ratio is 10:5:85) as the extractant, and the three-stage countercurrent extraction is carried out according to the ratio of volume ratio water / oil=2:1, and the extraction rate is 97.27%; the organic reverse extraction is carried out using 1.5mol / L dilute sulfuric acid, and the back extraction The rate reaches 99.25%; Add ammonia water to adjust the pH value to between 7.5 in the aqueous phase after stripping, make tetravalent V (IV) with VO (OH) 2 Precipitated in the form of ferrous sulfate redox titration, the rate of vanad...
Embodiment 2
[0021] The vanadite ore ironmaking waste slag is leached with 3mol / L dilute sulfuric acid, the leaching temperature is 85°C, and the leaching time is 10h; the glycerol is W (glycerol): W (V 2 o 5 ) = 1:8 was added to the leaching solution, at a temperature of 50°C, and the treatment time was 20 minutes; the pH value was adjusted to 2.30-2.50 with the above-mentioned dilute sulfuric acid, and the extraction agent mixed with P204, TBP and 260# solvent oil (the three The volume ratio is 10:5:85) according to the ratio of volume ratio water / oil=2:1 for three-stage countercurrent extraction, the extraction rate is 96.53%; using 1.5mol / L dilute sulfuric acid to extract the organic phase, the stripping rate reaches 99.24%; add ammoniacal liquor to adjust the pH value to 6.8 in the aqueous phase after stripping, make tetravalent V (IV) with VO (OH) 2 It was determined that the rate of vanadium precipitation was 98.04%; finally, the precipitate was calcined in a muffle furnace at 550°...
Embodiment 3
[0023] The vanadite ore ironmaking waste slag was leached with 5mol / L dilute sulfuric acid, the leaching temperature was 75°C, and the leaching time was 12h; the glucose was expressed as W(glucose):W(V 2 o 5 ) = 1:10 into the leaching solution, at a temperature of 80°C, and a treatment time of 2 hours; adjust the pH value to 2.30-2.50 with the above-mentioned dilute sulfuric acid, and use the extraction agent mixed with P204, TBP and 260# solvent oil (the three The volume ratio is 10:5:85) according to the ratio of volume ratio water / oil=2:1 for three-stage countercurrent extraction, the extraction rate is 95.45%; use 1.5mol / L dilute sulfuric acid to extract the organic phase, and the countercurrent extraction rate is 95.45%. Up to 99.20%; add ammonia water to adjust the pH value to 7.5 in the aqueous phase after stripping, so that the tetravalent V (IV) can be converted into VO (OH) 2 It was determined that the vanadium deposition rate was 98.03%; finally, the precipitate wa...
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