研究了不同配比的NaCl-K2ZrF6熔盐体系的熔点,K2ZrF6:NaCl=3:7的熔点较低为721℃.在此基础上,研究了熔盐配比、阴极电流密度、电解温度等因素对NaCl-K2ZrF6熔盐体系电解精炼电流效率的影响,结果表明阴极电流密度、电解温度均与电流效率成反比.采用XRD及元素含量分析等方法研究了电解精炼产品质量.较佳的工艺条件为K2ZrF6:NaCl为3:7(%,质量分数),温度800℃,阴极电流密度1 A·cm-2,在此条件下,电流效率可达84%以上.阴极锆为合格的工业级锫产品,产品中Fe,Ni,Cr,Mn等杂质分别由2700×10-6,540×10-6,350×10-6,400×10-6降低到30×10-6,10×10-6,18 ×10-6,100×10-6以下,产品纯度达到99%以上.
参考文献
[1] | 熊炳昆;温旺光;杨新民;李惠媛 罗方承 张伟 郭靖茂.锫铪冶金[M].北京:冶金工业出版社,2002 |
[2] | 熊炳昆;杨新民;罗方承;张伟.锆铪及其化合物应用[M].北京:冶金工业出版社,2002 |
[3] | 许原,白晨光,陈登福,邱贵宝,温良英.海绵钛生产工艺研究进展[J].重庆大学学报(自然科学版),2003(07):97-100. |
[4] | Frees F H.Sixteenth annual international titanium association conference and exhibition[J].Light Metal Age,2001(02):82. |
[5] | 吴延科,李庆彬,徐志高,王力军,熊炳昆.金属锆的制备方法[J].稀有金属,2009(04):462-466. |
[6] | Mohandas K S;Fray D J .FFC Cambridge process and removal of oxygen from metal-oxygen systems by molten salt electrolysis:an overview[J].Transactions of the Indian Institute of Metals,2005,57:579. |
[7] | Sehra J C;Vijay P I;Gupta C K .Preparation of zirconium and hafnium metal powders using fused salt electrolysis[J].High Temperature Materials and Processes,1995,14(02):115. |
[8] | Steinberg M A .Extractive metallurgy of zirconium by the dectrolysis of fused salts Ⅱ Process development of the electrolytic production of zirconium from K2ZrF6[J].Journal of the Electrochemical Society,1954,101(02):63. |
[9] | Chen G Z;Fray D J;Farthing T W .Direct electrochemical reduction of titanium dioxide to titanium in molten calcium chloride[J].Nature,2000,407:361. |
[10] | Fray D J;Farthing T W;Chen G Z .Removal of oxygen from metal oxide sand solid solution electrolysis inafused salt[P].UK PCT/GB99/01781,1998-06-05. |
[11] | 郭春芳,董云会,于先进,李德刚,张丽鹏.直接电脱氧法制备金属锆[J].中国有色金属学报,2007(06):1019-1023. |
[12] | 吴延科,陈松,徐志高,王力军.熔盐电解法制备锆粉的研究[J].稀有金属,2009(01):62-65. |
[13] | Horizons Titanium Corporation .Improved Electrolytic process for Purifying Titanium,Zirconium Or Hafnium[P].GB823125,1959-2. |
[14] | 李兆军;高玉璞;郭乃名 .钛电解精炼中阳极过程的研究[J].稀有金属,1989,13(04):307. |
[15] | 莫畏;邓国珠;罗方承.钛冶金[M].北京:冶金工业出版社,1998 |
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