CSP结晶器保护渣固态渣膜结构和矿相的分析

特殊钢 ›› 2006, Vol. 27 ›› Issue (1): 21-23.

CSP结晶器保护渣固态渣膜结构和矿相的分析

董方^1,2, 王艺慈², 王宝峰²

1北京科技大学，北京100083;
2内蒙古科技大学材料与冶金学院，包头014010

收稿日期:2005-08-25 出版日期:2006-02-01 发布日期:2006-02-01
作者简介:董方(1964),男，副教授，硕士生导师，1987年毕业于东北大学冶金系，现在北京科技大学攻读博士学位，从事钢铁冶金与金属材料方面的研究
基金资助:
内蒙古自然科学基金资助项目(编号200208020206)

An Analysis on Solidified Film Structure and Mineralogical Phase of Mould Powder for Compact Strip Production

Dong Fang^1,2,Wang Yici², Wang Baofeng²

1 University of Science and Technology,Beijing 100083;
2 College of Material and Metallurgy,Inner Mongolia University of Science and Technology,Baotou 014010)

Received:2005-08-25 Published:2006-02-01 Online:2006-02-01

摘要/Abstract

摘要： 通过光学显微镜、扫描电镜及X射线衍射分析，研究了1537 mm×67 mm CSP连铸结晶器保护(%:34.6CaO,28.6SiO₂,8.8C,8.5F,8.6Na₂O)固态渣膜的结构、矿相组成和析晶率，分析结果表明，绝大多数固态渣膜厚0.6~1.3mm, 呈三层结构：结晶层-玻璃层-结晶层，靠结晶器壁侧为0.10～0.14mm 厚的结晶层；CSP 固态渣膜的析晶率为40%～80%,结晶矿相主要为枪晶石(3CaO ·2SiO₂ ·CaF₂)和矿物Na₂O ·Al₂O₃ ·SiQ₂。通过调整固态渣膜的厚度及枪晶石等矿物的析晶率，可达到控制渣膜传热，提高连铸坯表面质量的目的

关键词:

CSP结晶器保护渣, , 固态渣膜, 析晶率, 结晶矿相

Abstract: The solidified film structure, mineralogical phase and crystallization rate of 1537 mm×67 mm mould pow- der(34.6CaO,28.6SiQ₂,8.8C,8.5F,8.6Na₂O)for Compact Strip Production(CSP)have been studied by optical and scanning electron microscope and X-ray diffraction analysis. The results showed that most of the solidified flux films had three layers with total thickness 0.6~1.3 mm:crystallizing layer - glassy layer - crystallizing layer,of which the thickness of crystallizing layer at the side near mould was 0.10～0.14 mm; the crystallization rate of CSP solidified flux film was 40% ~80%,and the crystallized mineralogical phases were cuspidine(3CaO ·2SiO₂ ·CaF₂)and mineralogical phase Na₂O · Al₂O₃ · SiO₂ .The thermal transformation shall be controlled by adjusting the thickness of solidified flux film and crystallization rate of cuspidine in the film to increase the surface quality of concasting slab

董方, 王艺慈 , 王宝峰. CSP结晶器保护渣固态渣膜结构和矿相的分析[J]. 特殊钢, 2006, 27(1): 21-23.

Dong Fang, Wang Yici, Wang Baofeng. An Analysis on Solidified Film Structure and Mineralogical Phase of Mould Powder for Compact Strip Production[J]. Special Steel, 2006, 27(1): 21-23.