Phase equilibria and reaction pathways during TiCl4 reduction by magnesium and sodium involving electronically mediated reaction

被引：11

作者：

Okabe, TH

Uda, T

Kasai, E

Waseda, Y

机构：

[1] Res. Ctr. for Metall. Proc. Eng., Inst. for Adv. Materials Processing, Tohoku University

来源：

JOURNAL OF THE JAPAN INSTITUTE OF METALS | 1997年 / 61卷 / 07期

关键词：

titanium; reduction; thermodynamics; magnesium; sodium; electron transfer;

D O I：

10.2320/jinstmet1952.61.7_610

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The mechanism of titanium deposition has been investigated in the study on the electronically mediated reaction (EMR) during metallothermic reduction. The importance of EMR as well as its usefulness on the mechanism of titanium deposition was recognized by utilizing isothermal chemical potential diagrams for Ti-Mg-Cl and Ti-Na-Ci at 1073 K. Phase equilibria and reaction pathways in the Kroll or Hunter process were also considered. In the Kroll process, a long-range electronically mediated reaction (LR-EMR) in which the titanium deposit and the reaction container act as an electron conductor was found to be dominant, and this leads to the formation of sponge titanium. Both the electron and ion transfers in NaCl solutions are quite likely to occur in the course of sodiothermic reduction of TiCl4. Thus, the formation of titanium powder in the Hunter process may be attributed to the short-range electronically mediated reaction (SR-EMR).

引用

页码：610 / 618

页数：9

共 19 条

[11]

KROLL W, 1937, Z ANORG U ALLOY CHEM, V34, P42

[12]

Kroll W.J., 1940, T ELECTROCHEM SOC, V78, P35, DOI DOI 10.1149/1.3071290

[13]

Levin E. M., 1964, PHASE DIAGRAMS CERAM, VI-VIII

[14]

MAKSIMOV VS, 1968, ELECTROCHEM MOL SOL, V6, P30

[15]

Okabe T. H., COMMUNICATION

[16]

ROGERS PS, 1991, PHISICAL CHEM PROCES, P909

[17]

Smirnov M.V., 1969, ELECTROCHEM MOL SOL, V7, P37

[18] SOME OBSERVATIONS ON THE KROLL PROCESS FOR TITANIUM [J].

WARTMAN, FS ;

BAKER, DH ;

NETTLE, JR ;

HOMME, VE .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1954, 101 (10) :507-513

[19]

1995, CAMP ISIJ, V8, P202

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