Three-section type heating and roasting method for refining vanadium pentoxide
A vanadium pentoxide, three-stage technology, which is applied in the field of three-stage heating and roasting, can solve the problems that the roasting temperature is difficult to control, affects production efficiency, and the conversion rate of vanadium is low, so that the roasting temperature is easy to control, the pollution is small, The effect of high conversion rate of vanadium
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[0044] Example 1:
[0045] The raw ore has a calorific value of 850 kcal per kilogram, and raw materials with a particle size of less than 10 mm are prepared after crushing. The raw materials first enter the circulating fluidized bed boiler for heating and preliminary decarburization. The high-temperature decarburized slag enters the first-stage roasting chamber at a temperature higher than 740 degrees Celsius. The first-stage roasting chamber can be filled to 90% of the volume, Pressurized air is injected into the raw materials in the first-stage roasting chamber to make the residual carbon in the materials continue to be fully burned. By controlling the amount of air injected into different parts of the material, the discharge temperature is controlled at 800-950 degrees Celsius; the first-stage roasting chamber passes about 2 After about hours of deep decarburization and preliminary roasting, the material enters the second-stage roasting chamber at a temperature of 800-950 deg...
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[0046] Example 2:
[0047] On the basis of Example 1, a heat dissipation device and agitating device are set in the first-stage baking chamber, and the heat dissipation device and agitating device in the first-stage baking chamber are controlled to control the baking temperature and prevent the material from coking.
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[0048] Example 3:
[0049] On the basis of Example 1, a stirring device is installed in the second-stage roasting chamber, and the stirring device in the second-stage roasting chamber is controlled to control the temperature of oxygen-enriched pressure roasting and prevent the material from coking.
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