Process for abstracting vanadium from iron-smelting waste slag of vanadium ¿Ccontaining iron ore
A technology for vanadium iron ore and waste residue, applied in the field of vanadium extraction, can solve the problems of affecting the vanadium extraction rate, the purity of vanadium solution, difficulty in recovery and treatment of mother liquor, chlorine pollution, etc., and achieve the effects of shortening the number of extraction stages, improving the purity, and reducing environmental pollution.
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Embodiment 1
[0019] The vanadium iron ore iron smelting residue is leached with 4mol / L dilute sulfuric acid, the leaching temperature is 80℃, and the leaching time is 8h; the ethylene glycol is divided into W (ethylene glycol): W(V 2 O 5 ) = 1:10 was added to the leaching solution, at a temperature of 40 ℃, processing time 30min; adjust the pH value to 2.30 ~ 2.50 with the above-mentioned dilute sulfuric acid, use P204, TBP and 260# solvent oil mixture (three volumes The ratio is 10:5:85) as the extractant, the three-stage countercurrent extraction is carried out at the ratio of water / oil=2:1 by volume, and the extraction rate is 97.27%; the organic reverse extraction is carried out with 1.5mol / L dilute sulfuric acid, and the reverse extraction The rate is 99.25%; ammonia water is added to the water phase after stripping to adjust the pH value to between 7.5, so that the tetravalent V(IV) is replaced by VO(OH) 2 The precipitation in the form of precipitation by ferrous sulfate redox titration ...
Embodiment 2
[0021] The vanadite ore iron smelting waste residue is leached with 3mol / L dilute sulfuric acid, the leaching temperature is 85℃, and the leaching time is 10h; 2 O 5 ) = 1:8 was added to the leaching solution, at a temperature of 50 ℃, treatment time 20min; adjust the pH value to 2.30 ~ 2.50 with the above-mentioned dilute sulfuric acid, using the extractant mixed with P204, TBP and 260# solvent oil (the three The volume ratio is 10:5:85) The three-stage countercurrent extraction is carried out at the ratio of water / oil=2:1 by volume, and the extraction rate is 96.53%; the organic reverse extraction is performed with 1.5mol / L dilute sulfuric acid, and the reverse extraction rate is up to 99.24%; add ammonia water to the water phase after stripping to adjust the pH to 6.8, so that the tetravalent V(IV) is replaced by VO(OH) 2 After the determination, the vanadium precipitation rate was 98.04%; finally, the precipitate was calcined in a muffle furnace at 550°C for 1 hour to obtain V...
Embodiment 3
[0023] The vanadite ore iron smelting residue is leached with 5mol / L dilute sulfuric acid, the leaching temperature is 75℃, and the leaching time is 12h; the glucose is divided into W(glucose): W(V 2 O 5 )=1:10 was added to the leaching solution at a temperature of 80°C for a treatment time of 2h; the above-mentioned dilute sulfuric acid was used to adjust the pH to 2.30~2.50, and the extractant mixed with P204, TBP and 260# solvent oil was used (the three The volume ratio is 10:5:85) Three-stage countercurrent extraction is carried out at the ratio of water / oil=2:1 by volume, and the extraction rate is 95.45%; the organic reverse extraction is performed with 1.5mol / L dilute sulfuric acid, and the countercurrent extraction rate is Reach 99.20%; add ammonia water to the water phase after stripping to adjust the pH value to 7.5, so that the tetravalent V(IV) is replaced by VO(OH) 2 After the determination, the precipitation rate of vanadium was 98.03%; finally, the precipitate was c...
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