Calciothermic reduction of titanium oxide and in-situ electrolysis in molten CaCl2
Calciothermic reduction of titanium oxide and in-situ electrolysis in molten CaCl2
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DOI：
10.1007/s11663-003-0074-1
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发表时间：
2003-06-01
影响因子：
3
通讯作者：
Ono, K
中科院分区：
文献类型：
--
作者：
Suzuki, RO;Teranuma, K;Ono, K
提出了在CaCl2熔体中用钙热直接还原二氧化钛的概念，并进行了实验验证。该生产过程由单一电解槽组成，其中钙热还原的热化学反应和回收还原剂钙的电化学反应共存于同一熔融的CaCl2熔池中。少量的摩尔百分比的钙溶解在熔体中，使介质具有很强的还原能力。用碳阳极和钛篮形阴极填充锐钛矿型二氧化钛粉末，在1173K的CaCl2溶液中，10.8K后制备出含氧量为2000ppm的金属海绵钛。CaCl2熔体中CaO的最佳浓度为0.5~1mol%，以缩短操作时间，降低钛中的氧含量。
A concept for calciothermic direct reduction of titanium dioxide in molten CaCl2 is proposed and experimentally tested. This production process consists of a single cell, where both the thermochemical reaction of the calciothermic reduction and the electrochemical reaction for recovery of the reducing agent, Ca, coexist in the same molten CaCl2 bath. A few molar percentages of Ca dissolve in the melt, which gives the media a strong reducing power. Using a carbon anode and a Ti basket-type cathode in which anatase-type TiO2 powder was filled, a metallic titanium sponge containing 2000 ppm oxygen was produced after 10.8 ks at 1173 K in the CaCl2 bath. The optimum concentration of CaO in the molten CaCl2 was 0.5 to 1 mol pct, to shorten the operating time and to achieve a lower oxygen content in Ti.