FIELD: chemistry.
SUBSTANCE: invention relates to a method for two-step calcination of vanadium-containing material. Method involves performing a first step of calcining raw material followed by performing a second calcination step. Temperature at first calcination step is maintained below temperature at second calcination step. Temperature at first calcination step is 750–850 °C, and temperature at second calcination step lies within range of 840–900 °C. Duration of second calcination step is 60–300 minutes. Raw material is a mixture containing vanadium-containing material and calcium-containing material.
EFFECT: technical result is prevention of sintering of material and its sticking to equipment, which increases rate of loading material, increases output and efficiency of production, and significantly improves vanadium conversion factor.
10 cl, 3 ex
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