Research On The Flow Of Granular Materials In Moving Bed

Shaft furnace, as an important metallurgical reactor types, is widely applications inthe metallurgical process crafts. It has guide meaning to industrial production byresearching on material flow phenomena in the shaft furnace. Continuum theory is oneof the direction of material flow research on shaft furnace. It is found that the existingfluid dynamics does give excellent results only in the area of material flow.It can notpredict slow moving area well. Granular material as a large numberof particles motion, is a common phenomenon in metallurgical reaction vessels, aredifferent from the movement of general fluid, unlike metal continuous plasticdeformation, also different from the single particle motion.This paper summarizes several typical material flow model, establishment of a newclass of models which can reserch on the granular material flow in the moving bed,while using solid particulate material experiments in moving bed to verify the feasibilityof the model. Using SIMPLE algorithm in disunion type to solve the new numerical model.The results of experimental and theory as follows:①Plug flow basically does not exist in a experimental device; distribution of thelateral velocity of flow materials is uneven on any height; material flows area and slowarea is obvious in the device; material flows area change unsignificantly varies with thedrain port discharge rate of a single drain port in the experiment. the experiment ofdouble-drain port proved: total range of material flow region is reduced when thedistance between the two drain port decreased gradually.②The influence apparent rate of material flows makes on material flow resistanceexplanation inertia force weight a lot in the situation of material flows; the materialapparent velocity increases, the material mobility becoming better shows that the statusof material flows maintaining by inertial becomes stronger.③This article describes the material flow(drag coefficient) elative correctlyestablishment of a new class of material flow model;this model can calculate the deadzone and the material flow area simultaneously，calculated is in good agreement withthe experimental results and reflects the important characteristics of the material flow;the dynamic model, demonstrated concrete expression resistance of control volume,has a better develop foundation compared to the kinematic model while has laid a goodfoundation for researching on moving phenomena of particulate material boundary layer within the moving bed and the strong orientation relationship between flow area andvolume field.