The preparation method of vanadium aluminum alloy can reduce the production cost of vanadium aluminum alloy. Using vanadium trioxide and vanadium pentoxide as raw materials and Al powder as reducing agent, vanadium aluminum alloy and slag were prepared by ignition reduction. Among them, the weight ratio of vanadium trioxide and vanadium pentoxide is 1∶1 ~ 2, and the amount of Al powder is 1.2 ~ 1.5 times of the total reduction of raw material to the theoretical amount of V (the theoretical amount is the amount of Al powder required for the total reduction of vanadium trioxide and vanadium pentoxide to vanadium metal). Compared with the existing process, this method has lower cost, fully meets the requirements of industrial large-scale production, and the impurities content in the produced vanadium aluminum alloy is low. In the final vanadium aluminum alloy, V is 75wt % ~ 85wt %, Fe≤0.3wt %, Si≤0.3wt %, which meets the requirements of further processing in the later sequence.
The invention relates to a vanadium aluminum alloy preparation method, belonging to the field of metallurgy. Background technology vanadium aluminum alloy is a basic material used in titanium alloys and is currently the second most popular field after vanadium in steel. Ti-6A1-4V and Ti-8Al-1Mo-1V, which together account for 50% of the titanium alloy market, are mainly used in the production of jet engines, high-speed aircraft frames and rocket engine casings. Vanadium used in titanium alloy production is added in the form of vanadal alloy.
In the production process of vanadium aluminum alloy, vanadium pentoxide is generally used as raw material and aluminum alloy is produced by thermo method. Due to the reaction of vanadium pentoxide with aluminum metal to release a large amount of heat, heat surplus, make the reaction explosive, adiabatic enough to raise the temperature of the system to more than 3000°C. Therefore, a certain amount of inert material (commonly known as antipyretic agent) is usually added to the charge to control the reaction speed and the temperature rise of the reaction product. Because the antipyretic agent always contains a certain amount of Fe, Si, P and heavy metal elements, the impurity content of vanadium aluminum alloy produced is high.
The technical solutions used to solve the technical problems are as follows: vanadium aluminum alloy preparation method, vanadium trioxide and vanadium pentoxide as raw materials, Al powder as reducing agent, in the reaction furnace ignition reduction to produce vanadium aluminum alloy and slag; Among them, the weight ratio of vanadium trioxide and vanadium pentoxide is 1:1 ~ 2, and the amount of Al powder is 1.2 ~ 1.5 times of the total reduction of raw material to the theoretical amount of V (the theoretical amount is the amount of Al powder required for the total reduction of vanadium trioxide and vanadium pentoxide to vanadium metal). Further, the purity of vanadium trioxide and vanadium pentoxide is > 99.5%.
