海绵钛生产工艺研究进展

金属钛有着比强度大、耐腐蚀等其他金属无法比拟的特性。钠还原法(Hunter法)已于1993年被彻底淘汰。国际上比较成熟而且工业化的工艺是Kroll法，即镁还原法，该工艺复杂、成本高而且对环境的影响大。目前国际最前沿的是“FFC剑桥工艺”，该工艺采用直接电化学还原，在氯化钙融盐中电解二氧化钛得到海绵钛。该工艺已在实验室取得成功，有着成本低、产品质量高、周期短、应用范围广等特点，是一种清洁的生产工艺。将海绵钛制取的其它工艺与“FFC剑桥工艺”对比的结果是“FFC剑桥工艺”是今后金属钛制取工艺的发展趋势。这种方法也有望应用于其他金属氧化物的电解。

Progress in the Research of Titanium Sponge Processes

Titanium has many desirable properties (high specific strength and high corrosion-resistance). Titanium metal is a sort of product with promising market. Hunter process disappeared completely in 1993. The most widespread titanium sponge process is Kroll process (magnesium reduction). Its shortcomings (complicated route, high cost and serious pollution) are obvious although it is the most mature technology. The most advanced came up in UK, 1998. It is characterized by low cost, excellent product, short route and extensive adaptability, and is a type of high cleanness process. Compared with other processes, this electrolyzing process for the direct reduction of TiO 2 represents the tendency of titanium metal making in the future, and should be applicable to a wide range of metal oxides.