Dissolution and diffusion of TiO2 in the CaO-Al2O3-SiO2 slag

被引：1

作者：

Zhong-shan Ren ^{[1
,2
]}

Xiao-jun Hu ^{[1
]}

Xin-mei Hou ^{[2
]}

Xiang-xin Xue ^{[3
]}

Kuo-chih Chou ^{[1
,2
]}

机构：

[1] State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing

[2] School of Materials and Metallurgy,Northeastern University

[3] School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing

来源：

InternationalJournalofMineralsMetallurgyandMaterials | 2014年 / 21卷 / 04期

关键词：

slags; titanium dioxide; dissolution; diffusion; interface;

D O I：

暂无

中图分类号：

X756 [冶金工业];

学科分类号：

083002 ;

摘要：

The dissolution of TiO2 in the CaO-Al2O3-SiO2 slag under static conditions was studied in the temperature range from 1643 K to 1703 K. After TiO2 dissolved, the microstructure of the interface between TiO2 and the slag was observed by scanning electron microscopy, and the concentration profiles of Ti4+ and other ions across the TiO2/slag interfaces were analyzed by energy-dispersive X-ray spectroscopy. On the basis of these results, the dissolution behavior of TiO2 was evaluated, and the diffusivity of Ti4+ in the bulk slag was estimated. According to the Stokes–Einstein relation, the viscosity calculated by a previously reported model gave a diffusivity of Ti4+ ions greater than that estimated by the concentration profiles of Ti4+ ions. The mechanism of TiO2 dissolution in the CaO-Al2O3-SiO2 slag is discussed in detail.

引用

页码：345 / 352

页数：8

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