本研究针对钛冶金领域中火法生产高钛渣、湿法生产人造金红石工艺中发现在钙、铁、硅杂质存在时二氧化钛进行煅烧反应与纯二氧化钛的煅烧反应相变不一致，引起煅烧后所得产物中的杂质难以脱除，进而影响海绵钛产品质量的问题，申请者提出采用高温原位XRD法对钙、铁、硅杂质存在时高温条件下二氧化钛相结构演变规律及相变机理进行分析研究。. 通过研究在煅烧条件下，不同杂质成分、不同杂质含量及不同温度条件下二氧化钛的实时物相，揭示二氧化钛的相变反应机理，找到在高温条件下杂质与二氧化钛的反应机理及影响二氧化钛相变的规律。在该反应机理及规律的指导下提高高钛渣及人造金红石中二氧化钛的含量，完善高钛渣煅烧的理论。

Aiming at problem of different titanium dioxide phase between metallurgy production with calcium iron silicon and pure titanium dioxide calcining，applicant Study the mechanism of the high temperature phase change of titanium dioxide with calcium iron silicon by in-situ XRD at high temperature. It were researched by In-situ XRD at high temperature that real-time phase product different impurities，concentration of impurities, temperature and pressure.The research reveals the reaction mechanism and direct relationship of the titanium dioxide content, impurities and chlorination activity of titanium dioxide Crystal form and phase of the formation in titanium metallurgy processing.The reaction mechanism and direct relationship make sure phase of titanium in calcimining product and chlorination.And also provide scientific guidance for industry process parameter improving concentration of titanium dioxide and percentage of chlorination.