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Effect of the Bubble Size and Chemical Reactions on Slag Foaming

机译：气泡大小和化学反应对矿渣起泡的影响

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Slag foams have been investigated with smaller bubbles than those used in the previous studies. The bubbles were generated by argon gas injection with the nozzle of multiple small orifices and by the slag/metal interfacial reaction of FeO in the slag with carbon in the liquid iron. The foam stability in terms of the foam index for a bath-smelting type of slag (CaO-SiO_2-Al_2O_3-FeO) was determined for different bubble sizes. The average diameter of bubbles in the foam was measured by an X-ray video technique. When the foam was generated by the slag/metal interfacial reaction at 1450 ℃, it was found that the average bubble diameter varied from less than 1 to more than 5 mm as a function of the sulfur activity in the carbon-saturated liquid iron. The foam index was found to be inversely proportional to the average bubble diameter. A general correlation is obtained by dimensional analysis in order to predict the foam index from the physical properties of the liquid slag and the average size of the gas bubbles in the foam.
机译：已经对矿渣泡沫进行了研究，泡沫比以前的研究中使用的泡沫更小。气泡是通过用多个小孔口的喷嘴注入氩气，以及炉渣中的FeO与液态铁中的碳的炉渣/金属界面反应而产生的。对于不同的气泡尺寸，确定了对于浴熔类型的炉渣（CaO-SiO_2-Al_2O_3-FeO），以泡沫指数表示的泡沫稳定性。通过X射线视频技术测量泡沫中气泡的平均直径。当在1450℃下通过炉渣/金属界面反应生成泡沫时，发现平均气泡直径根据碳饱和液态铁中的硫活度从小于1到大于5 mm不等。发现泡沫指数与平均气泡直径成反比。通过尺寸分析获得一般的相关性，以便根据液体炉渣的物理性质和泡沫中气泡的平均尺寸来预测泡沫指数。

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