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

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