Preparation method of metal vanadium powder
A vanadium powder and metal technology, applied in the field of metal vanadium powder preparation, can solve the problems of poor thermoplasticity, limited popularization and application, low metal vanadium grade, etc., and achieves the effect of reducing the reaction diffusion distance and speeding up the reaction process.
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preparation example Construction
[0019] Concrete, the preparation method of metal vanadium powder, comprises the following steps:
[0020] A, chlorination of vanadium-containing powder: take vanadium-containing powder as vanadium source and chlorine as chlorination medium, carry out boiling chlorination to obtain vanadium chloride first product;
[0021] B, purification of vanadium chloride first product: carry out two-step distillation to vanadium chloride first product at 110~140 ℃ and 160~180 ℃ respectively, collect the distillate during distillation at 160~180 ℃, obtain high-purity vanadium chloride intermediate product ;
[0022] C. High-temperature reduction of vanadium chloride: after heating and gasifying the intermediate product of vanadium chloride, it is mixed with high-purity H 2 Mixing, and then contacting with the reaction carrier, a reduction reaction occurs to obtain high-purity ultra-fine metal vanadium powder.
[0023] Due to the strong binding ability of vanadium and oxygen, vanadium oxid...
Embodiment 1
[0032] The ferrovanadium alloy powder with a purity of 99.6%, an average particle size of 50 mesh, and a vanadium mass fraction of 80.5% is subjected to a chlorination reaction with chlorine gas with a purity of 99.9% in a fluidized bed at 400 ° C, and the liquid chlorination product obtained will be collected. Perform two distillation operations at 110°C and 180°C respectively, and collect the high-purity vanadium chloride intermediate product at the second distillation condensation port. The obtained intermediate product of vanadium chloride is heated and gasified at 500 °C, and passed through a spray gun with a wall temperature of 500 °C, a spray gun pressure of 0.5 MPa and a high-purity H with a preheating temperature of 300 °C. 2 Mixing, and then contacting and reacting with a reaction carrier whose surface temperature is 1100° C. to obtain metal vanadium powder.
[0033] Through the above operation, the purity of the obtained high-purity vanadium chloride intermediate pr...
Embodiment 2
[0035] The ferrovanadium alloy powder with a purity of 99.8%, an average particle size of 100 mesh, and a vanadium mass fraction of 81.0% was subjected to a chlorination reaction with chlorine gas with a purity of 99.9% in a fluidized bed at 500 °C, and the obtained liquid chlorinated products were respectively in Carry out two distillation operations under the conditions of 125°C and 170°C, and collect the high-purity vanadium chloride intermediate product at the condensation port of the second distillation. The obtained intermediate product of vanadium chloride was heated and vaporized at 600°C, and passed through a spray gun with a wall temperature of 600°C and a spray gun pressure of 1.0 MPa and high-purity H with a preheating temperature of 400°C. 2 Mixing, and then contacting and reacting with a reaction carrier whose surface temperature is 1250° C. to obtain metal vanadium powder.
[0036]Through the above operation, the purity of the obtained high-purity vanadium chlor...
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