| 摘要 |
Two methods of obtaining sponge titanium from sodium fluotitanate involve reacting a mixture of aluminium and zinc and optionally magnesium with sodium fluotitanate to form sponge titanium and by-products, introducing inert gas after the reaction is completed and removing by-product in a liquid phase and then distilling in a vacuum to remove other by-products. In the first method aluminium and zinc are mixed in a vacuum in a mass ratio between 1:2 and 1:10. NaF and AlF3 are removed and then Zn is removed by distillation. In the second method aluminium, zinc and magnesium are mixed under a vacuum inert gas introduction condition in a mass ratio between 18:108:1 and 1:6:10. NaF, AlF3, MgF2 are removed then and Zn and Mg are removed by distillation. Reaction temperature for the first method is 800 0C and 950 0C for the second method. Distillation temperature for the first method is 1000 0C and 1100 0C for the second method. |
