Method for selectively removing impurity P from vanadium solution obtained through vanadium slag calcification and acid leaching
A selective and solution technology, applied in the field of removing impurity P, can solve the problems of complex process, flammability, volatile organic extractant, etc., and achieve the effects of low vanadium loss rate, low phosphorus removal cost, and good phosphorus removal effect.
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[0028] Example 1
[0029] Calcination activation temperature of powdered calcium silicate is 200℃, calcination time is 120 minutes, take 10g of calcined and activated calcium silicate and add it to 1000mL acidic vanadium solution (solution pH = 2.50, vanadium concentration of 7.51g / L, phosphorus concentration of 98.84 mg / L), stir evenly, adjust the pH of the solution system to 4.5 with a sulfuric acid solution with a mass concentration of 10%, continue to stir at 60°C for 180 minutes, filter after the reaction, determine the concentration of vanadium and phosphorus in the filtrate, and obtain the phosphorus removal rate It is 75.52%, and the vanadium loss rate is 2.11%.
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[0030] Example 2
[0031] Calcination activation temperature of powdered calcium silicate is 800℃, calcination time is 120 minutes, take 10g of calcined and activated calcium silicate, add it to 1000mL acidic vanadium solution (solution pH=2.55, vanadium concentration is 8.01g / L, phosphorus concentration is 100.00 mg / L), stir evenly, adjust the pH of the solution system to 2.5 with a sulfuric acid solution with a mass concentration of 20%, continue to stir at 60°C for 180 minutes, filter after the reaction, determine the concentration of vanadium and phosphorus in the filtrate, and obtain the phosphorus removal rate It is 52.51%, and the vanadium loss rate is 2.1%.
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[0032] Example 3
[0033] Calcination activation temperature of powdered calcium silicate is 800℃, calcination time is 120 minutes, take 12g of calcined and activated calcium silicate, add it to 1000mL acidic vanadium solution (solution pH=2.55, vanadium concentration is 8.01g / L, phosphorus concentration is 100.00 mg / L), stir evenly, adjust the pH of the solution system to 4.5 with a sulfuric acid solution with a mass concentration of 10%, continue to stir at 60°C for 180 minutes, filter after the reaction, determine the concentration of vanadium and phosphorus in the filtrate, and obtain the phosphorus removal rate It is 80.75%, and the vanadium loss rate is 3.56%.
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