CaCl_2熔盐直接电解还原钛铁矿的研究
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摘要
在CaCl_2熔盐中,采用熔盐电解法还原钛铁矿。在槽电压分别为3.0V和3.1V、825～900℃时,研究了不同槽电压及电解温度对钛铁矿电解还原的影响,并对钛铁矿电解脱氧过程进行了讨论。结果表明,在电解过程中铁优先还原,反应区中铁含量高时易形成TiFe_2合金;槽电压对钛铁矿电解产物有重要影响;提高反应温度有利于促进铁钛的互扩散合金化过程。
Ilmenite was reduced by molten salt electrolysis in CaCl_2 melts.Effects of cell voltage and temperature on electrolysis process were investigated under the conditions of cell voltage of 3.0 Vor 3.1 V and temperature of 825～900℃.Process to remove oxygen from ilmenite was discussed.The results show that iron in ilmenite is reduced firstly.TiFe_2 alloy is easy to form in reaction area where iron content is high.Cell voltage has a big influence on electrolysis product.Raising reaction temperature is beneficial for diffusion-alloying process of titanium and iron.
Ilmenite was reduced by molten salt electrolysis in CaCl_2 melts.Effects of cell voltage and temperature on electrolysis process were investigated under the conditions of cell voltage of 3.0 Vor 3.1 V and temperature of 825～900℃.Process to remove oxygen from ilmenite was discussed.The results show that iron in ilmenite is reduced firstly.TiFe_2 alloy is easy to form in reaction area where iron content is high.Cell voltage has a big influence on electrolysis product.Raising reaction temperature is beneficial for diffusion-alloying process of titanium and iron.
引文
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[8]张超,刘娜,朱国峰.新型USTB法清洁钛提取技术[J].金属世界,2015,31(1):70-73.
[9]李晴宇,杜继红,奚正平,等.熔盐电解法制备高钛铁合金[J].稀有金属,2011,35(6):829-834.
[10]施瑞盟,白晨光,杜继红.CaCl2熔盐电解钛精矿制备TiFe合金[J].重庆大学学报(自然科学版),2011,34(7):34-38.
[11]郭晓玲,郭占成,王志.TiO2和Fe2O3直接电解还原制备TiFe合金[J].北京科技大学学报,2008,30(6):620-624.
[12]施瑞盟,白晨光,杜继红.温度对钛精矿熔盐电解制备钛铁合金的影响[J].稀有金属材料与工程,2011,40(11):2043-2046.
[2]DEREK J FRAY.Emerging molten salt technologies for metals production[J].JOM Journal of the Minerals,Metals and Materials Society,2001,53(10):27-31.
[3]PARK I,ABIKO T,OKABE T H.Production of titanium powder directly from TiO2 in CaCl2 through an electronically mediated reaction(EMR)[J].Journal of Physics and Chemistry of Solids,2005,66(2):410-413.
[4]KATSUTOSHI ONO,RYOSUKE O SUZUKI.A new concept for producing Ti sponge:Calciothermic reduction[J].JOM Journal of the Minerals,Metals and Materials Society,2002,54(2):59-61.
[5]RYOSUKE O SUZUKI.Calciothermic reduction of TiO2and in situ electrolysis of CaO in the molten CaCl2[J].Journal of Physics and Chemistry of Solids,2005,66(2):461-465.
[6]UDAY B P,DAVID E W,GEORGE B K.Emerging SOMtechnology for the green synthesis of metals from oxides[J].JOM Journal of the Minerals,Metals and Materials Society,2001,53(10):32-35.
[7]TORU H OKABE.Titanium powder production by preform reduction process(PRP)[J].Journal of Alloys&Compounds,2004,364(1):156-163.
[8]张超,刘娜,朱国峰.新型USTB法清洁钛提取技术[J].金属世界,2015,31(1):70-73.
[9]李晴宇,杜继红,奚正平,等.熔盐电解法制备高钛铁合金[J].稀有金属,2011,35(6):829-834.
[10]施瑞盟,白晨光,杜继红.CaCl2熔盐电解钛精矿制备TiFe合金[J].重庆大学学报(自然科学版),2011,34(7):34-38.
[11]郭晓玲,郭占成,王志.TiO2和Fe2O3直接电解还原制备TiFe合金[J].北京科技大学学报,2008,30(6):620-624.
[12]施瑞盟,白晨光,杜继红.温度对钛精矿熔盐电解制备钛铁合金的影响[J].稀有金属材料与工程,2011,40(11):2043-2046.