Method for preparing vanadium nitride and device

Abstract

The invention specially relates to an industrial batch-type vanadium nitride producing method and devices. Grinded vanadium oxide powder and carbonaceous are used as raw materials, which binder is added in, to produce vanadium nitride by heating in microwave oven. The characteristic is mixing vanadium oxide, active carbon and binder according properly ratio, then briqueting and forming, putting the formed material into special microwave heating oven, unceasingly exhausting to keep vacuum, prereducing, carbononizing, nitrating and natural cooling, finally the product is taken out the oven. This product is used as additive agent of various kinds of alloy steel containing vanadium mainly.

Description

technical field

[0001] The invention belongs to the technical field of vanadium alloys, in particular to a method and equipment for industrially producing vanadium nitride in batches. Background technique

[0002] Existing vanadium nitride preparation methods at home and abroad have: (1) U.S. Patent US3745209 proposes, take vanadium pentoxide or ammonium metavanadate as raw material, the mixed gas of hydrogen, nitrogen and natural gas, or ammonia, nitrogen and natural gas, ammonia The mixed gas with carbon monoxide is reducing gas and nitriding gas, and vanadium nitride containing V74.2-78.7%, N4.2-16.2%, and C6.7-18.0% is continuously produced in a fluidized bed or a rotary tube. The reduction temperature is 800-1200°C, preferably 900-1100°C. The disadvantages of this method are: low reduction efficiency, large consumption of reducing and nitriding gases; the product is powdery and cannot be directly added to the steelmaking furnace. (2) P. K. Tripathy et al. proposed in ...

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