METHOD FOR PREPARING TITANIUM SPONGE FROM SODIUM FLUOROTITANATE VIA ALUMINOTHERMY

摘要

A method for preparing titanium sponge from sodium fluorotitanate via aluminothermy, comprising the following steps: a reaction step: in a vacuum, mixing aluminum and zinc, then reacting by adding sodium fluorotitanate; a separation step: allowing a completely reacted product to stand, introducing an inert gas, extracting NaF and AlF3 from an upper layer liquid phase; and a distillation step: in a vacuum, distilling off Zn in the remaining product, Zn-Ti; where the mass ratio of aluminum to zinc is between 1:2 and 1:10. Also provided is another method for preparing titanium sponge from sodium fluorotitanate via aluminothermy, comprising the following steps: a reaction step: in a vacuum and having the inert gas introduced, mixing aluminum, zinc, and magnesium, then reacting with sodium fluorotitanate; a separation step: allowing a completely reacted product to stand, introducing the inert gas, extracting NaF, AlF3, and MgF2 from an upper layer liquid phase; and a distillation step: in a vacuum, distilling off Mg and Zn in the remaining product; where the mass ratio of aluminum to zinc to magnesium is between 18:108:1 and 1:6:1.