SOLID AND LIQUID MOVEMENT CHARACTERISTICS IN 2-DIMENSIONAL COLD MODELFOR THE DRIPPING ZONE OF A BLAST-FURNACE

Liquid hold-up, liquid discharge distribution and velocity vector of m oving particles were measured under the fixed bed and moving bed condi tions in a two-dimensional (2D) cold model of 1/10 scale for the dripp ing zone in a blast furnace, in which stainless steel balls and filter ed water were used instead of coke and metal or slag. At relatively sm all liquid flow rates and in a packed bed with scattered voids as in t his cold model and a blast furnace, restricted liquid paths were forme d in the packed bed, and consequently the liquid distribution became n onuniform. The liquid movement in the moving bed was much different fr om that in the fixed bed. In the fixed bed, total and static hold-ups of the 2D model agreed with those of a previously reported one-dimensi onal (1D) cold model, respectively. Each liquid hold-up in the moving bed was remarkably greater than that in the fixed bed. As liquid veloc ity increased, each liquid hold-up increased. In the moving bed, total and static hold-ups of the 2D model were larger than those of the 1D model, respectively.