Reduction Product Separation by Vacuum Distillation in the Process of Titanium Sponge Preparation

The composition of reduction product,which is produced in the magnesium reduction process for titanium sponge preparation,was analyzed.Saturated vapor pressure value of each component was calculated,and the vacuum dissociation reaction of low-valent titanium chloride produced in reduction reaction was theoretically analyzed,based on thermodynamics.The results show that the reduction product is mainly composed of Ti,TiCl2,TiCl3,Mg and MgCl2.The volatility of Mg,MgCl2,TiCl2,TiCl3 is much larger than Ti during vacuum distillation process.TiCl2 and TiCl3 will dissociate under vacuum conditions.Industrial practice shows that high-quality 0A level titanium sponge can be obtained through vacuum distillation.