摘要
采用自制的结晶器模拟装置,研究了不同碱度无氟渣的传热情况,同时获得了实验条件下的凝固渣膜,并运用差热分析及X射线衍射等分析手段,研究了不同碱度无氟渣的结晶性能和结晶矿相。结果表明,在浸入渣液的前30 s内碱度变化对无氟渣渣膜传热的影响较为显著,随碱度增加,热流密度先升后降,在碱度为1.3时,达到峰值;析出的主要结晶矿物为硅硼酸钙或硼硅酸钙,碱度变化对析出矿物的种类没有太大影响;在等渣膜厚度的情况下,结晶质渣膜比玻璃质渣膜的传热要缓慢。
An experimental apparatus for simulating copper mold was used to study the influence of basicity on the heat transfer of fluorine-free slag and the solid slag films were obtained under the experimental conditions at the same time. The crystalline properties and mineralogical phase of fluorine-free slag examples with different basicity were determined by differential thermal analysis and X-ray diffraction. The results show that the influence of basicity on heat transfer of fluorine-free flux film is more significantly in 30 s after immerged in liquid slag. The density of heat flux firstly increases and then decreases with the increment of basicity, which is up to the max. when the basicity is 1.3. The main crystalline mineral is Calcium Borate Silicate （Ca 11Si4B2022）, and the change of basicity has little impact on the kind of minerals. If the thickness of mold flux film is the same,the heat transfer of crystalline mold flux is slower than that of glassy mold flux film.
出处
《铸造技术》
CAS
北大核心
2010年第7期918-921,共4页
Foundry Technology
基金
内蒙古自然科学基金资助项目(20080404MS0704)
关键词
碱度
无氟渣
传热
结晶性能
结晶矿相
Basicity
Fluorine-free slag
Heat transfer
Crystalline properties
Crystallized mineralogical phase
