On the principle of similarity, the early slag flow in dropping zone is investigated hydraulically with an experimental set-up locally analogues to a blast furnace.

The semiemperical relationship of the angle 9 out of the vertical may be expressed aswhere (dP/dL)G/γl is the dimensionless pressure gradient, μl and γl the viscousityand the specific gravity of melts respectively, L and G the gravitational flow of melts in liquid and gaseous states, fs the surface area of piled melts and ε the porousity.

Using the Free Particle Method on Voronoi Cells, the Navier Stokes Equation in the gauge invariant form was solved to get the flux velocities and pressure at meniscus in flux pool, by introducing the variation m and Yang Mills gauge transformationm=u+gradφ.

According to the continuum approach in a porous medium and the modified Ergun equation, amathematical model is developed, which describes the counter-current flows of gas and liquid streamthrough a packed bed.

Pneumatic manipulators for interrupting converter-slag flow

Good agreement between the predicted and plant data was obtained in terms of matte and slag flow rates, matte grade, and copper, iron, magnetite, and silica contents in the slag.

A major advantage of the model is that slag flow, heat transfer and solidification of the strand shell are solved simultaneaously.

Ash melt characteristics influence bed permeability, and fluxes may need to be added to modify slag flow characteristics.

Evaluation of the slag flow characteristics of Australian bituminous coals in slagging gasifiers.

In this paper an attempt has been made,by a model test, to find out the behavior of flow of primary slags in blast furnace. It has been verified that the slags within softening-melting zone flow downward along the declination of this zone and gether together at its lowest part where the slags fall down. Therefore, slags near to the wall flow downward rather more than in the middle part of the furnace when the softening-melting zone is of a shape of inverse V. Conversly, slags in the middle part flow downward...

In this paper an attempt has been made,by a model test, to find out the behavior of flow of primary slags in blast furnace. It has been verified that the slags within softening-melting zone flow downward along the declination of this zone and gether together at its lowest part where the slags fall down. Therefore, slags near to the wall flow downward rather more than in the middle part of the furnace when the softening-melting zone is of a shape of inverse V. Conversly, slags in the middle part flow downward rather more when the zone V-shaped. As to the W-shaped zone, an intermediate state would be appeared. In tuyere region, the flow path of slags change again due to the effect of gas flow in raceway, such that a dry region below raceway occurs. Based on the analysis above, a model to show the behavior of slag flow in blast furnace has been developed qualitatively.

Making the model experiment as similar to the actual operation of a blast furnace as possible, this paper presents a quantitative investigation on the behavior of the flow of primary slag in blast furnaces. It is found that a strongly horizontal gas flow occurs in blast furnaces due to the softening melting-zones and the coke layers.Primary slag is therefore forced to fall down out of the vertical and then outflow together to the lower ends of the softening melting-zones. The semiemperical relationship of the...

Making the model experiment as similar to the actual operation of a blast furnace as possible, this paper presents a quantitative investigation on the behavior of the flow of primary slag in blast furnaces. It is found that a strongly horizontal gas flow occurs in blast furnaces due to the softening melting-zones and the coke layers.Primary slag is therefore forced to fall down out of the vertical and then outflow together to the lower ends of the softening melting-zones. The semiemperical relationship of the angle 9 out of the vertical may be expressed aswhere (dP/dL)G/γl is the dimensionless pressure gradient, μl and γl the viscousityand the specific gravity of melts respectively, L and G the gravitational flow of melts in liquid and gaseous states, fs the surface area of piled melts and ε the porousity. These formulas imply that the angle θ relates to the air blast or its velocity, the specific gravity and viscousity of melts and other properties of burden. A metallurgic analysis has been made for the relation between the angle θ of the flow of primary slag and the operation of blast furnaces.

According to the continuum approach in a porous medium and the modified Ergun equation, amathematical model is developed, which describes the counter-current flows of gas and liquid streamthrough a packed bed. At the same time, the hydraulic experiment regionally simi1ar to a B. F.has been made. The calculated results are on the whole consistent with experimental ones. The results showthat, under the condition that softening zone is inverse-V shape, the inclined flowing of the liquidslag in dropping zone will...

According to the continuum approach in a porous medium and the modified Ergun equation, amathematical model is developed, which describes the counter-current flows of gas and liquid streamthrough a packed bed. At the same time, the hydraulic experiment regionally simi1ar to a B. F.has been made. The calculated results are on the whole consistent with experimental ones. The results showthat, under the condition that softening zone is inverse-V shape, the inclined flowing of the liquidslag in dropping zone will take place because of the influence of gas flow. The distribution of pri-mary slag on the cross-section in dropping zone is binomial (abnormal). Under normal conditions,the inclined flowing of primary slag is mainly affected by the type of softening zone including itsshape and its inner construction. This phenomenon is also an important factor that deteriorates thepermability of dropping zone, especially the coke layers of softening zone. On this basis, thispaper presents the reasonable measures to improve the operation of B. F.