Method for carrying out phosphorus removal on acidic vanadium-containing solution

Abstract

The invention relates to the field of phosphor removal of an acidic vanadium-containing solution, and discloses a method for carrying out phosphorus removal on the acidic vanadium-containing solution, wherein the method comprises the following step: under the condition with a pH value of 2.5-3.5, carrying out a contact process on the acidic vanadium-containing solution, hydrogen peroxide and zirconium sulfate. According to the method for carrying out phosphorus removal on the acidic vanadium-containing solution disclosed by the invention, the allowed concentration range of the acidic vanadium-containing solution is large, and the phosphor removal can be effectively carried out on the acidic vanadium-containing solution; moreover, the vanadium loss is relatively small when the phosphor removal is carried out.

Description

technical field

[0001] The invention relates to a method for removing phosphorus from an acidic vanadium-containing solution. Background technique

[0002] Vanadium slag is the main raw material for the preparation of vanadium oxide. At present, there are two main industrialized vanadium extraction processes, namely, sodium roasting and vanadium extraction process and calcification roasting vanadium extraction process. The vanadium slag used in industrial production is mainly ordinary vanadium slag, which is characterized by low CaO content, generally CaO / V 2 O 5 ≤0.15. However, for CaO / V 2 O 5 For high-calcium and high-phosphorus vanadium slag ≥0.16 and P≥0.06%, it is not suitable to use sodium roasting-water leaching vanadium slag due to the high CaO content leading to a significant reduction in roasting conversion rate; The vanadium process treatment of high calcium and high phosphorus vanadium slag, first of all, it is necessary to solve the technical problem of dee...

Examples

Embodiment 1

[0026] Get 1000mL acid vanadium-containing solution (pH=2.86, TV=1.94g / L, P=1.76g / L), add the hydrogen peroxide aqueous solution 30mL (acidic vanadium-containing solution: H 2 O 2 =100ml: 0.9g) and 11.4g of zirconium sulfate (molar ratio Zr / P=0.7), stirred at 50°C for 30min; adjusted the pH of the solution with ammonium bicarbonate = 3.5, stirred for 60min, left standing for 2h after the reaction, and filtered to obtain a filtrate, Wherein TV=1.89g / L, P=0.027g / L (vanadium recovery rate 99%, phosphorus removal rate 98.5%).

Embodiment 2

[0028] Get 1000mL acid vanadium-containing solution (pH=3.2, TV=6.72g / L, P=1.26g / L), add the hydrogen peroxide aqueous solution 10mL (acidic vanadium-containing solution: H 2 O 2 =100ml: 0.3g) and 13.9g of zirconium sulfate (molar ratio Zr / P=1.2), stirred at 40°C for 15min; adjusted the pH of the solution with ammonium carbonate=3.0 and stirred for 30min, after the reaction was completed, let stand for 2h, and filtered to obtain a filtrate, wherein TV=6.64g / L, P=0.022g / L (vanadium recovery rate 99.3%, phosphorus removal rate 98.2%).

Embodiment 3

[0030] Get 1000mL acid vanadium-containing solution (pH=3.44, TV=22.08g / L, P=0.47g / L), add the hydrogen peroxide solution 50mL (acidic vanadium-containing solution: H 2 O 2 = 100ml: 1.5g) and 6.5g of zirconium sulfate (molar ratio Zr / P=1.5), stirred at 30°C for 5min; adjusted pH=2.7 with ammonia, stirred for 10min, left standing for 2h after the reaction, and filtered to obtain a filtrate, in which TV =21.31g / L, P=0.025g / L (vanadium recovery rate 98.9%, phosphorus removal rate 94.4%).

technical field

[0001] The invention relates to a method for removing phosphorus from an acidic vanadium-containing solution. Background technique

[0002] Vanadium slag is the main raw material for the preparation of vanadium oxide. At present, there are two main industrialized vanadium extraction processes, namely, sodium roasting and vanadium extraction process and calcification roasting vanadium extraction process. The vanadium slag used in industrial production is mainly ordinary vanadium slag, which is characterized by low CaO content, generally CaO / V 2 O 5 ≤0.15. However, for CaO / V 2 O 5 For high-calcium and high-phosphorus vanadium slag ≥0.16 and P≥0.06%, it is not suitable to use sodium roasting-water leaching vanadium slag due to the high CaO content leading to a significant reduction in roasting conversion rate; The vanadium process treatment of high calcium and high phosphorus vanadium slag, first of all, it is necessary to solve the technical problem of dee...

Examples

Embodiment 1

[0026] Get 1000mL acid vanadium-containing solution (pH=2.86, TV=1.94g / L, P=1.76g / L), add the hydrogen peroxide aqueous solution 30mL (acidic vanadium-containing solution: H 2 O 2 =100ml: 0.9g) and 11.4g of zirconium sulfate (molar ratio Zr / P=0.7), stirred at 50°C for 30min; adjusted the pH of the solution with ammonium bicarbonate = 3.5, stirred for 60min, left standing for 2h after the reaction, and filtered to obtain a filtrate, Wherein TV=1.89g / L, P=0.027g / L (vanadium recovery rate 99%, phosphorus removal rate 98.5%).

Embodiment 2

[0028] Get 1000mL acid vanadium-containing solution (pH=3.2, TV=6.72g / L, P=1.26g / L), add the hydrogen peroxide aqueous solution 10mL (acidic vanadium-containing solution: H 2 O 2 =100ml: 0.3g) and 13.9g of zirconium sulfate (molar ratio Zr / P=1.2), stirred at 40°C for 15min; adjusted the pH of the solution with ammonium carbonate=3.0 and stirred for 30min, after the reaction was completed, let stand for 2h, and filtered to obtain a filtrate, wherein TV=6.64g / L, P=0.022g / L (vanadium recovery rate 99.3%, phosphorus removal rate 98.2%).

Embodiment 3

[0030] Get 1000mL acid vanadium-containing solution (pH=3.44, TV=22.08g / L, P=0.47g / L), add the hydrogen peroxide solution 50mL (acidic vanadium-containing solution: H 2 O 2 = 100ml: 1.5g) and 6.5g of zirconium sulfate (molar ratio Zr / P=1.5), stirred at 30°C for 5min; adjusted pH=2.7 with ammonia, stirred for 10min, left standing for 2h after the reaction, and filtered to obtain a filtrate, in which TV =21.31g / L, P=0.025g / L (vanadium recovery rate 98.9%, phosphorus removal rate 94.4%).