Solid and Liquid Movement Characteristics in Two-dimensional Cold Model for the Dripping Zone of a Blast Furnace

Abstract

Liquid hold-up, liquid discharge distribution and velocity vector of moving particles were measured under the fixed bed and moving bed conditions in a two-dimensional (2D) cold model of 1/10 scale for the dripping zone in a blast furnace, in which stainless steel balls and filtered water were used instead of coke and metal or slag.
At relatively small liquid flow rates and in a packed bed with scattered voids as in this cold model and a blast furnace, restricted liquid paths were formed in the packed bed, and consequently the liquid distribution became nonuniform. The liquid movement in the moving bed was much different from 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-dimensional (1D) cold model, respectively. Each liquid hold-up in the moving bed was remarkably greater than that in the fixed bed. As liquid velocity 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.