TiO<sub>2</sub>对连铸保护渣非等温结晶过程的影响

冀成庆; 谢兵; 雷云; 刁江; 齐飞

doi:10.13374/j.issn1001-053x.2010.03.006

TiO₂对连铸保护渣非等温结晶过程的影响

冀成庆^1,2,
谢兵^1,2,
雷云^1,2,
刁江^1,2,
齐飞³

1. 重庆大学材料科学与工程学院, 重庆 400044;
2. 重庆大学重庆市冶金工程重点实验室, 重庆 400044;
3. 中冶京诚工程技术有限公司, 北京 100176

基金项目:

国家自然科学基金资助项目(No.50474024)

教育部博士点基金资助项目(No.200806110006)

详细信息

作者简介:
冀成庆(1985-),男,硕士研究生;谢兵(1957-),教授,博士生导师,E-mail:bingxie@cqu.edu.cn

分类号: TF777.1
计量
- 文章访问数: 349
- HTML全文浏览量: 110
- PDF下载量: 12
出版历程
- 收稿日期: 2009-07-19
- 网络出版日期: 2021-08-06
- 刊出日期: 2010-03-24

Effects of TiO₂ on nonisothermal crystallization process of casting mold fluxes

JI Cheng-qing^1,2,
XIE Bing^1,2,
LEI Yun^1,2,
DIAO Jiang^1,2,
QI Fei³

1. College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China;
2. Chongqing Key Laboratory of Metallurgical Engineering, Chongqing University, Chongqing 400044, China;
3. CERI Engineering Technology Co., Ltd., Beijing 100176, China

摘要

摘要: 采用热丝法、X射线衍射(XRD)以及矿相方法研究TiO₂对保护渣非等温结晶过程的影响.结果表明:枪晶石是含钛保护渣的主要物相.在综合碱度为1.3的基础渣中加入质量分数2%～8%TiO₂后,随着TiO₂的加入,渣样开始析出了少量的Ca₂SiO₄、Ca₂Al(AlSi₇O₇)、Ca₂SiO₂F₂和CaTiO₃晶体.虽然加入TiO₂,促进了析晶种类的增加,但保护渣的结晶过程的时间延长,且保护渣的结晶速率和结晶率降低.因此,加入TiO₂后,抑制了保护渣的析晶,从而保证在控制渣膜热流的前提下,提高玻璃态的比例以改善润滑.
- 保护渣 /
- 结晶 /
- 非等温 /
- 连铸
Abstract: The nonisothermal crystallization behavior of mold fluxes bearing various TiO₂ was studied by using the single hot thermocouple technique.The mineral components of the mold fluxes were analyzed by X-ray diffraction (XRD) and microscopically observed by mine-phase microscope.The results indicate that cuspidine is the main phase of the casting mold fluxes.With a certain amount of TiO₂ (2% to 8%) added into the mold fluxes at high basicity (ΣR=1.3),the phase precipitation increases.Small amount of Ca₂SiO₄,Ca₂Al(AlSi₇O₇),Ca₂SiO₂F₂ and CaTiO₃ are crystallized.While the time of crystallization process of the mold fluxes is lengthened,the crystallization ratio and crystallization rate of the mold fluxes is decreased.Thus,crystallization of the mold fluxes is inhibited,leading to improvement in the glass property and the lubrication between casting strands and molds in view of the heat flow control of slag films.
- mold fluxes /
- crystallization /
- nonisothermal /
- casting