摘要
使用钙处理法把Al2O3系夹杂改质为钙铝酸盐的程度,主要取决于钙与硫还是与Al2O3系夹杂进行反应。通过热力学计算,推导了钙处理Al2O3系夹杂,改质为不同xCaO·yAl2O3的临界硫含量a[S]e=K5·a1/3Al2O3/（a（CaO）·a2/3[Al]）和临界钙含量值a[Ca]e=a（CaO）·a2/3[Al]·（K4·a2/3Al2O3）-1。推荐了在工业生产中,既能在精炼温度下使Al2O3系夹杂呈液态,有利于夹杂物上浮;又能在连铸时,防止中间包水口蓄流的钢中钙的推荐值（[Ca]T）,根据钢液不同的[Al]含量（0．01％～0．05％），[Ca]T应控制在13×10-6～41×10-6。
The degree of Al2O3 inclusion modification into calcium aluminates by calcium treatment mainly depends on whether calcium reacts with sulphur or with Al2O3 inclusions. Through thermodynamic calculation, it was deduced that for Al2O3 inclusion modification into different xCaO · yAl2O3 by calcium treatment the critical sulfur content a[S]e=K5·a1/3Al2O3/（a（CaO）·a2/3[Al]）and the critical value of calcium content a[Ca]e=a（CaO）·a2/3[Al]·（K4·a2/3Al2O3）-1 cium content in steel should be controlled at 13×10-6～41×10-6 according to different [Al] contents （0.01% 0.05 %）, which can not only keep Al2O3 inclusion in liquid state at refining temperature in favor of inclusion floating, but also avoid tundish nozzle clogging in industrial production.
出处
《安徽冶金》
2014年第1期14-18,共5页
Anhui Metallurgy
关键词
钙处理
Al2O3系夹杂改质
热力学计算
Calcium treatment Al2O3 inclusion modification thermodynamic calculation
