Extraction method for vanadium in vanadium slag
An extraction method and technology for vanadium slag, which are applied in the field of vanadium extraction from vanadium slag, can solve the problems of material sticking on the inner wall of equipment, unfavorable environmental protection, and reduced vanadium leaching rate, so as to shorten the roasting and oxidation time and improve the oxidation rate. Conversion rate, the effect of improving leaching rate
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Embodiment 1
[0031] Mix the vanadium slag and sodium carbonate evenly and add it into the shaft furnace. The drying preheating temperature is controlled at 150°C, the drying time is controlled at 1h, the roasting temperature is controlled at 600°C, the roasting time is 2.5h, and the oxygen amount at the side of the furnace bottom is Combustion produces 3 times the amount of waste gas, the oxygen concentration in the roasting area is about 79%, the temperature of the material out of the furnace is about 100°C, the vanadium slag and sodium carbonate are roasted and directly enter the wet mill, and add normal temperature industrial water at the material inlet of the wet mill. According to the control of 6 tons / h, the internal temperature of the wet mill is about 80°C, the material stays in the wet mill for 1.8 hours, and then the material is discharged into the vacuum filter for filtration to obtain sodium vanadate solution and residue; the sodium vanadate in the residue is measured The conten...
Embodiment 2
[0033] Mix the vanadium slag and sodium carbonate evenly, and put it into the shaft furnace. The drying temperature is controlled at 180°C, the drying time is controlled at 0.8h, the roasting temperature is controlled at 850°C, and the roasting time is 2.0h. The amount of waste gas produced is twice that of the exhaust gas, the oxygen concentration in the roasting area is about 73%, the temperature of the material out of the furnace is about 140°C, the vanadium slag and sodium carbonate are roasted and directly enter the wet mill, and normal temperature industrial water is added to the material inlet of the wet mill, according to 8.5 tons / h control, the internal temperature of the wet mill is about 85°C, the material stays in the wet mill for 1.5h, and then the material is discharged into the vacuum filter for filtration to obtain sodium vanadate solution and residue; the sodium vanadate content in the residue is measured to be 0.46 %, return the residue to the wet mill to con...
Embodiment 3
[0035]Mix the vanadium slag and sodium carbonate evenly, after adding to the shaft furnace, the drying temperature is controlled at 200°C, the drying time is controlled at 0.6h, the roasting temperature is controlled at 1000°C, the roasting time is 1.5h, and the amount of oxygen at the side of the furnace bottom is combustion The amount of waste gas produced is 1.8 times, the oxygen concentration in the roasting area is about 70%, the temperature of the pellets is about 160°C, the vanadium slag and sodium carbonate are roasted and directly enter the wet mill, and normal temperature industrial water is added to the material inlet of the wet mill, according to 10 Ton / h control, the internal temperature of the wet mill is about 85°C, the material stays in the wet mill for 1.3 hours, and then the material is discharged into the vacuum filter for filtration to obtain sodium vanadate solution and residue. The measured sodium vanadate content in the residue is 0.34%, and then add ammo...
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