SLIDE VALVE OF BLAST FURNACE AIR HEATERS Russian patent published in 1998 - IPC

FIELD: metallurgy. SUBSTANCE: slide valve has air-cooled lined housing and locking disk. Housing has annular sealing stops with cooling air supplying annular chambers. Cooling air flows in housing through slots made in annular chambers. Annular chamber positioned adjacent to supplying pipeline embraces annular sealing stop from outer side and opposed annular chamber adjoins to inner side of annular sealing stop. Housing lining at hot blast flow supply side is made cylindrical, with diameter of cylinder being equal to pipeline effective diameter. Ratio of contraction step height and cylindrical surface effective diameter is 0.2-0.3 the width of channel defined between annular sealing stops. Ratio of depth, at which annular sealing stops are arranged, and channel width is 1-1.2. EFFECT: increased efficiency, simplified construction and enhanced reliability in operation. 2 dwg, 2 tbl