多级复合流化床制备四氯化钛

摘要

为了解决四氯化钛制备过程中的粘结问题,采用复合流化床新工艺进行中试试验制备四氯化钛,可以有效利用镁钙含量大于2.5％的高钛渣原料.对氯气流量、流态化温度等参数的影响进行研究,并对反应产物的形貌进行分析,同时计算了反应效率.结果表明:TiO2的转化率达到90％,通过检测发现收尘渣表面富集MgCl2和CaCl2,而流化床中未出现粘结,说明该流化床具有一定的抗粘结能力.%In order to solve the agglomeration problem in TiCl4 preparation,a new test in a multistage series combined fluidized bed was studied on a pilot scale.The pilot plant can make full use of titanium slag with a high content of MgO and CaO as the feedstock.Several experimental parameters such as chlorine flow and reaction temperature were discussed and the morphology and components of reaction product were analyzed.According to the results,the conversion rate of TiO2 is up to 90％.It is found that the combined fluidized bed has good anti-agglomeration ability because the accumulation of MgCl2 and CaCl2 on the surface of unreacted slag was carried out of the reactor.