冶金熔体泡沫演化中的转型  

Morphotype Conversion of Foams in Metallurgical Melts

作　　者：牛强[1] 储少军[1] 吴铿[1] 杨天钧[1] 

机构地区：[1]北京科技大学冶金学院,北京100083

出　　处：《北京科技大学学报》2000年第2期109-112,共4页Journal of University of Science and Technology Beijing

基　　金：国家自然科学基金!59574026

摘　　要：通过理论分析和实验验证，证实冶金熔体泡沫演化过程中存在由球状泡沫到多面体泡沫的转型．泡沫转型前的演化速率可由伽利略数Ｇａ定性判断，而泡沫转型后的多面体泡沫破灭阶段，可以用量纲为一的因子Ｓａ来定性判断．应用泡沫转型理论，解释了冶金熔体与常温溶液泡沫衰减过程机理的差异，也给出了内生气源更容易发泡的原因．Based on morphology, it is presented that morphotype conversion of foams in metallurgical melts would occur during foam evolution, which has been proved by experimental results. By means of morphotype conversion, a new interpretation on foams decay process was provided for promotion of kinetics on foaming. Characteristic numbers Ga and factor Sa were employed to be as criterion to qualitatively determine the decay rate before and after the morphotype conversion, respectively. The reasons also were given on contrast in foams stability from different liquid and gas source.

关 键 词：泡沫转型 冶金熔体 泡沫衰减 泡沫演化 

分 类 号：TF01[冶金工程—冶金物理化学]