New Method for Low-Cost Titanium Production
New Method for Low-Cost Titanium Production
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DOI：
10.4028/www.scientific.net/kem.436.41
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发表时间：
2010-05
期刊：
影响因子：
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通讯作者：
A. Martínez;K. S. Osen;E. Skybakmoen;O. Kjos;G. Haarberg;K. Dring
中科院分区：
文献类型：
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作者：
A. Martínez;K. S. Osen;E. Skybakmoen;O. Kjos;G. Haarberg;K. Dring
研究了以富钛渣为原料电解法生产钛的工艺。该方法包括两个步骤：i）炉渣的碳热还原以形成碳氧化钛粉末;和ii）使用碳氧化钛自耗阳极在熔融氯化物基电解质中电解。电化学研究表明，在850 ℃等摩尔的NaCl-KCl熔体中，不同的Ti物种的稳定性。这些结果，再加上以前的工作，在熔融氯化物中的自耗钛碳氧化物阳极的阳极氧化机制，使我们能够优化的阳极和阴极的电压在电解实验。结果表明，当还原发生在单个电化学步骤中时，即直接从二价钛物质到Ti金属，获得最佳质量的钛沉积物。然后，必须通过向电解质中添加Ti海绵来实现从自耗碳氧化物阳极释放的Ti（III）离子向Ti（II）物质的完全转化。
The present work deals with the investigation of an electrolytic method for titanium production that uses TiO2 enriched titania slag as raw material. The process involves two steps: i) carbothermal reduction of the slag to form titanium oxycarbide powder; and ii) electrolysis in a molten chloride-based electrolyte using a titanium oxycarbide consumable anode. Electrochemical studies show the stability of the different Ti species in the equimolar NaCl-KCl melt at 850oC. These results, together with previous work about the anodic oxidation mechanism of a consumable titanium oxycarbide anode in molten chlorides, allow us to optimize the anode and cathode voltages in the electrolysis experiments. The results show that best quality titanium deposits are obtained when the reduction occurs in a single electrochemical step, i.e. directly from di-valent titanium species to Ti metal. Then, the complete conversion of the Ti(III) ions released from the consumable oxycarbide anode to Ti(II) species by adding Ti sponge to the electrolyte, must be fulfilled.