Method for extracting vanadium from vanadium slag through blank roasting and quaternarization
A technology of blank roasting and vanadium slag, applied in the field of vanadium chemical metallurgy, to achieve the effect of reducing consumption, high heat transfer efficiency, and improving vanadium conversion rate
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[0051] Example 1
[0052] (1) Add 1kg of vanadium slag with a particle size of 100-200 mesh into the boiling furnace, and control the blast volume of the boiling furnace to 4Nm 3 / h (under standard conditions), the air flow rate is 1.0m / s, the temperature is increased to 900°C for blank roasting for 0.4h, and the roasted clinker is naturally cooled in the air;
[0053] (2) Add ammonium bicarbonate solution to the roasted clinker obtained in step (1) for ammoniumization, and at the same time add a sodium carbonate regulator of 3% by mass of vanadium slag to control the concentration of the ammonium bicarbonate solution to 50wt% and the temperature to 50%. ℃, the liquid-solid ratio of the solution to the roasted clinker is 0.4:1, and the ammoniumization time is 3h;
[0054] (3) After the ammonium reaction is completed, add hot liquid to the mixture for leaching, and leaching at 90°C for 3 hours. The ammonia gas and carbon dioxide generated during leaching are decomposed to synthesize ...
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[0057] Example 2
[0058] (1) Add 0.1kg of vanadium slag with a particle size of 150-200 mesh into the boiling furnace, and control the blast volume of the boiling furnace to 1Nm 3 / h (under standard conditions), the air flow rate is 1.8m / s, the temperature is raised to 800°C for blank roasting for 0.45h, and the roasted clinker is naturally cooled in the air;
[0059] (2) Add ammonium bicarbonate solution to the roasted clinker obtained in step (1) for ammoniumization, and at the same time add a sodium carbonate regulator with a mass of 2% vanadium slag to control the concentration of the ammonium bicarbonate solution to 30wt% and the temperature to 40 ℃, the liquid-solid ratio of the solution to the roasted clinker is 0.4:1, and the ammoniumization time is 1h;
[0060] (3) After the ammonium reaction is completed, add hot liquid to the mixture for leaching, and leaching at 80°C for 2.5 hours. The ammonia gas and carbon dioxide generated during leaching are decomposed to synthesize...
Example Embodiment
[0063] Example 3
[0064] (1) Add 0.5kg of vanadium slag with a particle size of 100-150 mesh into the boiling furnace, and control the blast volume of the boiling furnace to 2Nm 3 / h (under standard conditions), the air flow rate is 0.8m / s, the temperature is raised to 950℃ for blank roasting for 0.2h, and the roasted clinker is naturally cooled in the air;
[0065] (2) Add ammonium bicarbonate solution to the roasted clinker obtained in step (1) for ammoniumization, and at the same time add sodium carbonate regulator with 5% mass of vanadium slag to control the concentration of ammonium bicarbonate solution to 45wt% and the temperature to 60 ℃, the liquid-solid ratio of the solution to the roasted clinker is 0.2:1, and the ammoniumization time is 1h;
[0066] (3) After the ammonium reaction is completed, add hot liquid to the mixture for leaching, and leaching at 90°C for 1 hour. The ammonia gas and carbon dioxide generated during leaching are decomposed to synthesize ammonium bic...
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