Roasting method for refining vanadium pentoxide
A vanadium pentoxide and roasting technology, which is applied in the direction of improving process efficiency, can solve the problems of low vanadium conversion rate of materials, limited production capacity, low oxidation atmosphere, etc., and achieve scientific and reasonable roasting process, low pollution and low energy consumption Effect
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Embodiment 1
[0060] The calorific value of the raw material is 15 kcal per kilogram. The raw materials are crushed into crushed materials with a particle size of 2-5 mm, and enter the roasting chamber at normal temperature. The high-temperature air with a temperature above 900 degrees Celsius is sprayed into each part of the material in the roasting room through the air pipe arranged in the cavity of the roasting room, and the high-temperature air directly heats the material; Below 920 degrees Celsius, the high-temperature flue gas heats the inner wall, and the inner wall heats the material; the residual carbon in the material is burned to generate heat. The temperature of the material reaches and maintains at 870-890 degrees Celsius. Use this temperature combined with the oxygen in the high-temperature air to deeply decarburize and roast the material.
Embodiment 2
[0062] On the basis of Example 1, an appropriate amount of combustible gas is evenly sprayed into the material whose temperature is lower than 750 degrees Celsius, so that the combustible gas is combusted to generate high-temperature flue gas; and the material is heated.
Embodiment 3
[0064] The calorific value of the raw material is 15 kcal per kilogram. The raw materials are crushed into crushed materials with a particle size of 2-5 mm, and enter the roasting chamber at normal temperature. The high-temperature flue gas with a temperature of 900 degrees Celsius is evenly sprayed into each part of the material in the roasting chamber through the air pipe arranged in the roasting chamber. The high-temperature flue gas is mixed with preheated oxygen-rich gas before spraying into the roasting device to make it contain oxygen The high-temperature flue gas directly heats the material; the temperature of the high-temperature flue gas sent into the interlayer set on the inner wall of the roasting chamber is not lower than 920 degrees Celsius, the high-temperature flue gas heats the inner wall, and the inner wall heats the material; the carbon residue in the material Combustion heat. Make the temperature of the material reach and maintain at 870--890 degrees Celsiu...
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