Effects of crystallisation behaviour of mould fluxes on properties of liquid slag film

被引：19

作者：

He, S. P. ^{[1
]}

Long, X. ^{[1
]}

Xu, J. F. ^{[1
]}

Wu, T. ^{[1
]}

Wang, Q. ^{[1
]}

机构：

[1] Chongqing Univ, Coll Mat Sci & Engn, Chongqing 630044, Peoples R China

来源：

IRONMAKING & STEELMAKING | 2012年 / 39卷 / 08期

基金：

中国国家自然科学基金;

关键词：

Mould fluxes; Crystallisation behaviour; Slag film; Fluorine free;

D O I：

10.1179/1743281212Y.0000000006

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

During the continuous casting of medium carbon steel slabs, stable liquid slag film performance is necessary to ensure that the process runs smoothly. In this paper, the effects of mould flux crystallisation behaviour on the properties of leftover liquid slag films were examined. First, the compositions of the leftover liquid slags of high fluorine, CaO-SiO2-TiO2 and CaO-SiO2-Na2O based mould fluxes after a single crystalline phase was separated were calculated. Then, the viscosity, melting temperature, break temperature and degree of crystallisation of each leftover liquid flux were measured. The results revealed that the properties of leftover liquid slag films of CaO-SiO2-TiO2 and CaO-SiO2-Na2O based mould fluxes are not as stable as those of high fluorine films after crystallisation. This paper provides a new method for developing fluorine free mould fluxes and for determining the most suitable type of crystalline phase that should be utilised in the continuous casting of medium carbon steel slabs.

引用

页码：593 / 598

页数：6

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