Preparing VO₂ Powder using Leach Solution of Vanadium Slag

Based on the actual state of PZH steel, VO₂ powder was prepared using the leach solution of vanadium-bearing slag as raw material for the first time.The preparing process includes removing the impurity of leach solution, hydrolytic precipitation and calcining the precipitated material at high temperature.The optimal conditions as follows: the ratio of dechromisation agent Z to total chrome is 22.86∶1, and the desiliconisation agent X to total silica is 3.2∶1, pH=4.5~5.0, circulating wash 5 times, calcining at 1 000 ℃, the time of constant temperature is 60 min, argon gas flow is 4 L/min.Compared with other methods, this preparing method is of more widely raw materials source and lower cost.The process is also simple and easy to realize industrial turn.