真空钙热还原二氧化钛制备钛粉的研究  

Preparation of Ti Powder by Calciothermic Reduction of TiO_2 in Vacuum Atmosphere

作　　者：贾金刚[1,2,3] 徐宝强[1,2,3] 徐敏[3] 杨斌[1,2,3] 熊恒[1,2,3] 

机构地区：[1]真空冶金国家工程实验室,云南昆明650093 [2]云南省有色金属真空冶金重点实验室,云南昆明650093 [3]昆明理工大学冶金与能源工程学院,云南昆明650093

出　　处：《钢铁钒钛》2013年第2期1-6,共6页Iron Steel Vanadium Titanium

基　　金：国家自然科学基金(项目编号:51004058);云南省应用基础研究计划项目(项目编号:2011FB039)

摘　　要：用金属钙做还原剂直接还原TiO2制备金属钛是一种流程短、成本较低的新工艺。研究了真空炉中1 000℃条件下还原时间和添加剂(CaCl2)用量对还原产物的影响,结果表明,在TiO2和CaCl2质量比为1∶4时,还原时间1.5 h后TiO2全部转化为金属钛;添加剂CaCl2可以促进TiO2还原反应的进行。对CaCl2和TiO2质量比为1∶2,还原时间6 h的还原产物进行酸洗后得到的钛粉分别进行XRD、EDS和氧氮含量分析检测,结果表明钛粉的纯度很高,钛粉的氧含量为1 000×10-6,氮含量为170×10-6。Calciothermic reduction of titanium oxide is a new process to prepare titanium powder with short route and low cost. In this paper, effect of the amount of additive（ CaC12 ） and reduction time on reduced products is studied at 1000℃ in vacuum atmosphere. The results show all the titanium oxide is converted into Ti metal after reduction for 1.5 h when mass ratio of CaC12 to TiO2 in raw materials is 1：4 and the re- duction reaction can be promoted with the addition of CaC12. After pickling, the obtained Ti powder was detected by X-ray diffractometer, scaning electron microscopy, and oxygen and nitrogen analyzer. It is found that there is no metallic impurity other than Ti in the titanium powder with oxygen content of 1 000×10^-6, nitrogen content of 170×10^-6.

关 键 词：钛粉 二氧化钛 钙热还原 真空 添加剂 还原时间 

分 类 号：TF823[冶金工程—有色金属冶金] TF13