PRODUCTION OF TITANIUM POWDERS BY THE CALCIOTHERMIC REDUCTION OF TIO2

被引：30

作者：

ONO, K ^{[1
]}

OKABE, T ^{[1
]}

OGAWA, M ^{[1
]}

SUZUKI, R ^{[1
]}

机构：

[1] KYOTO UNIV,GRAD SCH,KYOTO 606,JAPAN

来源：

TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN | 1990年 / 76卷 / 04期

关键词：

D O I：

10.2355/tetsutohagane1955.76.4_568

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

According to the measurements of equilibrium oxygen concentration in Ti under Ca-CaO co-existence, the deoxidation limit is 500 ppm at 1273 K. On the basis of these data, preparation of Ti powders has been carried out by reduction of TiO2 using saturated Ca vapors, liquid Ca and CaH2 powders at 1273 K and subsequent rinsing of CaO in an aqueous solution of HCl, CH3COOH or NH4Cl. The oxygen and calcium levels in the Ti powders reduced by the saturated Ca vapors and the liquid Ca were not below 2 000 and 1 000 ppm, respectively. Reduction of the TiO2-CaO mixtures has led to residual oxygen with a range of 1 000-2 000 ppm; thus the presence of CaO in the starting oxide was effective to control the sintering between reduced Ti powders. The particle size of the reduced Ti was 1-10 μm. Reduction of TiO2 by mixing with excess amount of CaH2 powders could eliminate oxygen below 700 ppm which is close to the deoxidation limit for Ti by Ca.

引用

页码：568 / 575

页数：8