渣-钢界面传质现象的物理模拟  

Physical Simulation of Mass Transfer Phenomena on Slag-Metal Interface

作　　者：杨春光[1] 李强[1] 邹宗树[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110004

出　　处：《东北大学学报（自然科学版）》2009年第8期1147-1150,共4页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(50774019)

摘　　要：在三维管式反应器水模型实验中,采用柴油机油和水来模拟渣和钢,利用苯甲酸钠既溶于水又溶于非挥发性油的特性,在保持油水相界面积一定的情况下,研究了苯甲酸钠示踪物质在油-水间的传质现象.通过不断改变循环水流量,利用PH-3G电导率仪测量了水中融入苯甲酸钠物质的质量浓度,进而获得苯甲酸钠在油-水两相的传质量.利用双膜理论判断了苯甲酸钠在油水两相边界层中传质的限制性环节并计算了传质系数.通过二元液体动力学理论计算得到了苯甲酸钠在水中的扩散系数.进而得到了实验条件下雷诺数、舍伍德数和施密特数的准数方程式.On the condition that the oil-water phase contact area was kept constant at room temperature, a model experiment was done on a 3-D tubular reactor using diesel engine oil and water to simulate the slag and steel, respectively, thus investigating the mass transfer phenomena by taking the advantage of sodium benzoate as a tracer that is soluble in both water and nonvolatile oil. Changing the circulating water flow rate uninterruptedly, the mass concentration of sodium benzoate in water was measured by the PH-3G conductivity meter to calculate the mass transfer rate. Based on the double membrane theory, the restrictions on mass transfer of sodium benzoate in the oil-water two phase boundary layer were judged with the equilibrium distribution ratio calculated. Furthermore, the diffusion coefficient of sodium benzoate in water was obtained on the basis of binary liquid kinetics theory, and the dimensionless number equation to determine the Reynolds, Sherwood and Schmidt numbers were given under the experimental conditions.

关 键 词：苯甲酸钠 电导率仪 传质系数 扩散系数 准数方程 

分 类 号：TF01[冶金工程—冶金物理化学]