底吹电弧炉水模型熔池内气液综合传质系数的测定  

Determination of Gas Liquid Volumetric Mass Transfer Coefficient in Water Model Bath of Bottom Stirring EAF

作　　者：李连福[1] 姜茂发[1] 

机构地区：[1]东北大学钢铁冶金系

出　　处：《东北大学学报（自然科学版）》1996年第5期480-484,共5页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金

摘　　要：根据溶液的ｐＨ值与ＣＯ２溶解量间的关系，测定了３０ｔ底吹电弧炉１∶７水模型中溶液的气液总综合传质系数（ｋＬＡ）与液体表面的气液综合传质系数（ｋＬＡ）Ｓ，由此计算了气泡区综合传质系数（ｋＬＡ）Ｂ．结果表明，底吹ＣＯ２后气泡区与表面区均因发生吸气反应而使溶液ｐＨ值降低；综合传质系数（ｋＬＡ）、（ｋＬＡ）Ｂ和（ｋＬＡ）Ｓ均随气体流量增大而增大；且回归得到了（ｋＬＡ）、（ｋＬＡ）Ｓ与气体流量Ｑ之间的关系分别为（ｋＬＡ）＝２．８０·Ｑ０．５１，ｃｍ３／ｓ；（ｋＬＡ）Ｓ＝１．２６·Ｑ０．４８，ｃｍ３／ｓ；Over all and free surface gas liquid volumetric mass transfer coefficient in water model which is 1∶7 scale of 30 t bottom stirring EAF is determined from the relations of pH value and CO 2 content. In this way volumetric coefficient in bubble dispersion zone is obtained theoretically. The results indicate that pH values in bubble dispersion zone and at the free surface are decreased because of gas absorbing reaction after bottom stirring CO 2,volumetric transfer coefficient ( k L A ),( k L A ) B and ( k L A ) S are increased with an increase in gas flowrate. The relationship between ( k L A ),( k L A ) S and gas flowrate is calculated with regression method as follows:( k L A )=2 80· Q 0 51 ,cm 3/s;( k L A ) S=1 26· Q 0 48 ,cm 3/s.

关 键 词：电弧炉 底吹 水模型 综合传质系数 溶池 炼钢 

分 类 号：TF748.41[冶金工程—钢铁冶金]