WATER-COOLED ARCH OF "FURNACE-LADLE" PLANT Russian patent published in 1998 - IPC

FIELD: ferrous metallurgy; steel making plants equipped with "furnace-ladle" units. SUBSTANCE: arch having form of trapezium in section includes circular header for delivery of carbon-containing gas which is located at a distance of 0.15 to 0.25 of height of arch from lower shear with nozzles for discharge of gas into under-arch space Nozzles are evenly distributed over circle at a pitch of 0.05 D, where is diameter of arch, m. Arch is provided with sealing member secured on lower portion of its outer surface; sealing member has cord on its lower edge. Sealing member may be from refractory material, for example, from asbestos fabric. Construction provides for creation of reducing atmosphere above surface of slag containing soot particles, thus reducing thermal flow by radiation from surface of slag to arch surface being cooled. EFFECT: enhanced efficiency. 2 cl, 1 dwg