Slag Crust Research Articles

Monitoring the condition of the slag crust in blast furnaces

Studies conducted at the Krivorozhstal' combine blast furnaces have shown that fusion of the crust can be established from the change in the total content of alkali metals in the slag. After the furnaces were blown out for repairs the remaining lining and crust were inspected. It was found that the lining of the uncooled part of the stock remained in relatively good shape with the greatest amount of lining wear seen between the second row of stack coolers and bosh coolers. The composition and structure of the slag crust for different regions of the furnaces were analyzed and various physicochemical properties leading to crust formation and behavior were assessed. It was concluded that the systematic determination of the fraction of K/sub 2/O in the alkali compounds in the furnace slag will permit monitoring of the conditions of the slag crust in the furnace and, in the event of the onset of its collapse, will enable measures to be taken to stabilize the heating of the furnace.

Formation and elimination of slag crusts in blast furnaces in smelting zinc-bearing charges

Formation and elimination of slag crusts in blast furnaces in smelting zinc-bearing charges

Heat transfer and the melting process in electroslag remelting: Part I. The behavior of small electrodes

On the assumption of one dimensional axial heat flow a mathematical model is developed for describing the temperature profile in small ESR units. The model considers the regions both above and below the slag level and allowance is made for the development of a slag crust on the electrode near the top slag level. The governing equations are solved numerically and the computed results appear to be in agreement with experimental data reported on a laboratory scale ESR unit, employing 1 in. electrodes.