镁热还原法制取金属钛的实验研究  

Research of producing titanium by magnesiothermic reduction process

作　　者：宋建勋[1,2,3] 徐宝强[1,2,3] 杨斌[1,2,3] 林大志[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]昆明理工大学材料与冶金工程学院,云南昆明650093

出　　处：《轻金属》2009年第12期43-48,共6页Light Metals

基　　金：国家自然科学基金;项目号:U0837604

摘　　要：对镁热还原二氧化钛制备金属钛反应过程进行了热力学分析,在此基础上,探索了二氧化钛"真空镁热还原-酸浸除杂"制取钛粉的新工艺。结果表明:镁还原二氧化钛在热力学上是可行的,且反应为放热反应;镁的热还原在实验条件下是压力减小的气固反应;在环境压力为10Pa^30Pa、温度为900℃~1400℃的条件下,低温利于钛粉的生成;过程中氯化钙的添加对还原影响不明显;在反应温度为900℃,反应时间为4h的条件下可得到粉状金属钛。In this paper, thermodynamic analysis of producing titanium powder by magnesiothermic - reduction process from titanium dioxide was carried out. Based on the thermodynamic analysis, a new extraction process of ＂vacuum reduction - impurity acid leaching＂ for titanium powders from titanium dioxide was investigated. The results indicated that it is feasible to produce titanium by calciothermie - reduction process from titanium dioxide on thermodynamics and the reaction is exothermic and gas - solid reaction under the experimental conditions; It＇ s beneficial to prouduce titanium powder at lower temperature on the conditions of 10Pa- 30 Pa and 900℃-- 1400℃ . The additive of CaCl2 has little effect on the result. Titanium powder can be obtained at 900℃ for 4h.

关 键 词：镁热还原 二氧化钦 钍 

分 类 号：TF823[冶金工程—有色金属冶金]