Abstract：A part of study on the generation mechanism of calcium aluminate’s inclusions by the means of heterogeneous nucleation theory was done. The calculation results show that when the acid solution aluminum is 0.03 percent and temperature is 1873K, if the Al2O3 inclusion generate in the molten by homogeneous nucleation, the dissolved oxygen must get 32.9x10-6 .Before Al-Killed, the dissolved oxygen is about 0.02%,so the reaction can happen. But after Al-killed ，the dissolved oxygen of getting equilibrium is about 3.3x10-6. It’s difficult to generate the CaO by homogeneous nucleation because of the low dissolved oxygen after Al-Killed. The Calcium aluminates inclusion generate on the surface of Al2O3.The reaction is [Ca]+(x+1/3)Al2O3=(CaO).yAl2O3 and the process is Al2O3CA6CA2CACxAy(liquid). This phenomenon was verified by SEM/EDS image.
Keyword: calcium aluminate’s inclusion, generation mechanism, nucleation, heterogeneous
2010, Vol. 45 
