Nature of MgO and Al2O3 Dissolution in Metallurgical Slags

被引：36

作者：

Yan, Pengcheng ^{[1
]}

Webler, Bryan A. ^{[1
]}

Pistorius, P. Chris ^{[1
]}

Fruehan, Richard J. ^{[1
]}

机构：

[1] Carnegie Mellon Univ, Dept Mat Sci & Engn, Ctr Iron & Steelmaking Res, Pittsburgh, PA 15213 USA

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE | 2015年 / 46卷 / 06期

关键词：

IN-SITU OBSERVATION; ALUMINA PARTICLES; INCLUSIONS; MGAL2O4;

D O I：

10.1007/s11663-015-0440-9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The nature of MgO and Al2O3 dissolution in metallurgical slags may affect production cost, efficiency, and product quality. However, the rate-limiting dissolution mechanism, chemical reaction or boundary layer diffusion, is not well understood. In the present report, the dissolution mechanism of MgO and Al2O3 in metallurgical slag was evaluated based on available literature data. The mass balance between the dissolving particle and the flux equation through the boundary layer was applied to predict the dissolution curve. The influence of fluid flow was taken into account to calculate the mass transfer rate at the oxide/slag interface. It was found that the rate-limiting step of MgO and Al2O3 dissolution is the same: mass transfer through the boundary layer. Depending on the slag composition and experimental temperature, the effective diffusion coefficient for MgO and Al2O3 dissolution falls in the range of 10(-12) to 10(-9) m(2)/s. (C) The Minerals, Metals & Materials Society and ASM International 2015

引用

页码：2414 / 2418

页数：5

共 19 条

[1] FactSage thermochemical software and databases [J].