摘要
通过光学显微镜、扫描电镜及X射线衍射分析，研究了1537mm×67mm CSP连铸结晶器保护渣（％：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·SiO2。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。
The solidified film structure, mineralogical phase and crystallizalion rate of 1537 mm×67 mm mould powder （34.6GaO, 28.6SiO2, 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 ～ 1.3mm： crystallizing layer - glassy layer - crystallizing layer, of which the thickness of crystallizing layer at the side near mould was 0.10 ～ 0.14 ram; the crystallization rate of CSP solidified flux film was 40% ～80%, and the erystallized mineralogical phases were cuspidine （3CaO·2SiO3·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.
出处
《特殊钢》
北大核心
2006年第1期21-23,共3页
Special Steel
基金
内蒙古自然科学基金资助项目(编号200208020206).
关键词
CSP结晶器保护渣
固态渣膜
析晶率
结晶矿相
CSP Mould Powder, Solidified Flux Film, Crystallization Rate, Mineralogical Phase
