| 简介 |
PROBLEM TO BE SOLVED : To provide a method for separating and refining rare metals by a chlorination volatilization method which provides a process in which a separation efficiency higher than a conventional process can be attained by combining addition of a calcium compound and solid carbon and a heat treatment. SOLUTION : The method for separating and refining rare metals includes : a first process being a heat treatment process comprising adding a calcium compound to a raw material and heat treating the resulting mixture in an inert atmosphere; a second process being a chlorination volatilization treatment process for producing high-concentration solid compounds of tantalum, chromium, and titanium by heating the calcium-treated sample in a chlorine gas stream to volatilize and separate tungsten, niobium, nickel, and cobalt; a third process being a chlorination volatilization treatment process for volatilizing and separating tantalum, chromium, titanium or the like, being contained rare metals, by mixing the high-concentration solid compounds with solid carbon and heating the resulting mixture in a chlorine atmosphere; and a fourth process being a separation and concentration process for performing simple body separation of each element by depositing the metal chlorides separated from a raw material powder or the high-concentration solid compounds by adjusting the temperature of a cooling zone. COPYRIGHT : (C)2008, JPO&INPIT |
客服热线：
手机版
二维码
