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以Ｎａ２Ｂ４Ｏ７熔体模拟冶金炉渣，提出了ＣａＣＯ３在熔渣中热分解的一种数学模型．实验证明，ＣａＣＯ３粒度变化和熔渣中ＣａＯ含量变化对内生气源发泡过程的影响均与熔渣中ＣａＣＯ３的分解行为有关．因此，吹气法测定的泡沫化指数 不能用于评价因内生气源引起的熔渣泡沫化稳定性．
A mathematical model of thermal decomposition of CaCO3 in slag was proposed by simulating the slag with Na2B4O7 melt. Experiments show that the changes of CaCO3 particle size and slag CaO content changes on the endogenous air source foaming process are related to the dissolution of CaCO3 decomposition behavior. Therefore, the bubble index determined by the air-blowing method can not be used to evaluate the stability of slag foaming due to endogenous gas sources.