增大蒸馏表面积对改善海绵钛蒸馏效率的影响研究

Effect of Increasing Distillation Surface Area on Improving Distillation Efficiency of Titanium Sponge

蒸馏工序是分离海绵钛和氯化镁的关键工序,蒸馏效率会影响产品罐中残留氯化镁以及过剩镁的去除,直接决定产品质量。另一方面蒸馏效率低会延长占炉周期,增加蒸馏电耗,影响生产效率。传统蒸馏工艺改善研究主要集中在控制蒸馏温度、延长蒸馏时间等方面,但对于提升蒸馏表面积的研究较少。通过还原前在反应器内插入钛棒增大海绵钛中部的蒸馏表面积,可在同等蒸馏物浓度和蒸馏温度的条件下达到提高海绵钛蒸馏效率的目的。研究表明,在保证氯化镁完全蒸馏的前提下,增大蒸馏表面积可明显提高海绵钛蒸馏效率,蒸馏时间由120 h降至105 h,降低蒸馏电耗,节约生产成本。

Distillation process is the key process for the separation of titanium sponge and magnesium chloride.The distillation efficiency will affect the removal of residual magnesium chloride and excess magnesium in the product tank,which directly determines the product quality.On the other hand,the low distillation efficiency will cause the extension of the furnace cycle,increase the distillation power consumption,and affect the production efficiency.The research on the improvement of traditional distillation process mainly focuses on the control of distillation temperature and extending the distillation time,but there are few studies on improving the surface area of distillation.By increasing the distillation surface area in the middle of titanium sponge in the reactor before reduction,the distillation efficiency of titanium sponge is improved under the same distillation concentration and distillation temperature.The results show that under the condition of ensuring the complete distillation of magnesium chloride,the distillation efficiency of titanium sponge is significantly improved by increasing the distillation surface area,the distillation time is reduced from 120 h to 105 h,which reduces the distillation power consumption and saves the production cost.