萤石对保护渣黏度及结晶矿相的影响  

Influence of fluorite on viscosity and crystalline phase of concasting mold powder

作　　者：刘丽娜[1] 刘磊[1] 刘志远 韩秀丽[1] 李志民[3] 

机构地区：[1]河北联合大学矿业工程学院,河北唐山063009 [2]唐钢中厚板材有限公司,河北唐山063009 [3]河北联合大学轻工学院,河北唐山063000

出　　处：《炼钢》2014年第2期66-69,共4页Steelmaking

基　　金：国家自然科学基金资助项目(51174073);河北省自然科学基金资助项目(E2011209081);河北省科技厅资助项目(11215601D)

摘　　要：在对现场保护渣及渣膜矿物成分的研究基础上,对萤石单矿物与保护渣黏度及凝固渣样结晶率、矿物成分之间的关系进行了分析。结果表明,现场保护渣矿物成分主要为硅灰石、石英、萤石和苏打;正常渣膜中矿物成分以黄长石为主,结晶率在90%以上。随萤石单矿物含量的增加,保护渣黏度降低,随测试温度的降低,保护渣黏度升高。不同萤石矿物自制凝固渣中物相组成为黄长石、枪晶石和玻璃相;萤石可促进枪晶石的生成,抑制黄长石的形成;随着萤石含量的增加,渣样中结晶率升高,但萤石质量分数小于10%时,增加幅度较小。The viscosity of the mold powder and the crystallization rates, mineral compo- sitions of solidified slag samples were analyzed on the basis of the study in industrial mold powder and slag film. The result shows that： The mineral composition of in indus- trial mold powder are wollastonite, quartz, fluorite and sodium carbonate. The crystal- line phase of ~[lux film of nothing wrong on casting slab quality is melilite, and the crys- tallization rate is 90 %. With the content of fluorite being increased, the viscosity of the mold powder is reduced, and with the test temperature declined, the viscosity is elevat- ed. The mineral composition of solidified slag are melilite, cuspidine and glassiness. With the content of fluorite being increased, the crystallization rates and the contents of cuspidine is increased, the content of melilite is reduced.

关 键 词：保护渣 萤石 黏度 结晶率 矿物组成 

分 类 号：TF777[冶金工程—钢铁冶金]