含钛炭阳极直接电解制备低钛铝合金

Preparation of low titanium aluminum alloy by direct reduction of TiO_2-containing carbon anode

采用含TiO_2炭阳极直接熔盐电解制备低钛铝合金。对含TiO_2炭阳极在CO_2/空气中的残余率分别进行测试,用XRD对含钛沥青焦进行分析,运用SEM和EDS手段对炭阳极、原铝和电解铝的形貌和组成进行表征。结果表明:TiO_2的添加可显著改善炭阳极在CO_2和空气中的残余率,当TiO_2添加量(质量分数)为1%时,炭阳极在CO_2中的残余率由76.3%急剧增加到93.5%,在空气中的残余率从51.87%增加到65.92%;TiO_2在炭阳极制备过程中其化学成分未发生变化,含TiO_2炭阳极在电解过程中运行稳定;随着炭阳极的消耗,TiO_2溶入电解质中,可实现低钛铝合金的制备。

The low titanium aluminum alloy was prepared by molten salt electrolysis process using TiO_2-containing carbon anode. The residual rates of TiO_2-containing carbon anode in CO_2 and in air atmosphere were tested, respectively, the TiO_2-containing pitch cokes were tested by XRD, the morphology and composition of TiO_2-containing carbon anode, initial aluminum and after electrolytic aluminum were analyzed by scanning electron microscope(SEM) and energy spectrum(EDS). The results show that the rate of residual of TiO_2-containing carbon anode can also be significantly improved with increasing Ti content. When adding amount of TiO_2 is 1%, the residual rate in CO_2 sharply increases from 76.3% to 93.5%, and the residual rate in air increases from 51.87% to 65.92%. The TiO_2 phase is unchanged during the process of preparing carbon anode. The TiO_2-containing carbon anode can run stably in the electrolysis process. The TiO_2 dissolves into electrolyte when the carbon anode is consumed, and the low titanium aluminum alloy is prepared.