China Nonferrous Metallurgy

At present, domestic and foreign titanium manufacturers use Kroll method to produce sponge titanium, and then use vacuum melting and casting to produce titanium and titanium alloy. This method has long process, high energy consumption, and batch production. The product cost is high, which limits the application and promotion of titanium metal.The TiO2 molten salt electrolysis method ( FFC method ) concerned by many scholars has the advantages of simple process flow and environmental friendly, but it is still not mature enough in technology, and needs further exploration and improvement.Based on the mechanism of Kroll method, a new continuous manufacturing process of titanium and titanium alloy was designed by using TiCl4 as raw material, Mg as reducing agent, and different reaction furnaces and furnace temperatures. The process uses a three-stage vertical nozzle to fully mix and contact react liquid TiCl4 with liquid Mg, and the reaction rate is high. The impurities in the liquid metal titanium or titanium alloy enter the reaction furnace gas under the vacuum condition of the reaction furnace or refining furnace, so that the purity of the product can be improved. The premise of this process is that the production scale is large, a large amount of Ti liquid or Ti alloy liquid can be continuously produced, and the Ti liquid one-time forming continuous casting technology can be realized in the Ar gas sealed chamber, which has the advantages of high production efficiency, large production capacity, high product quality, low processing cost and easy to realize intelligence. The successful development of this process can not only greatly reduce the production cost of titanium and titanium alloy materials, but also rapidly expand the application range of titanium and titanium alloy materials.