C - Chemistry – Metallurgy – 21 – B
Patent
C - Chemistry, Metallurgy
21
B
39/59
C21B 7/18 (2006.01)
Patent
CA 1102545
METHOD AND APPARATUS FOR RESEALING THE LARGE BELL ROD IN A DOUBLE BELL CHARGING SYSTEM FOR A BLAST FURNACE ABSTRACT OF THE DISCLOSURE When the packing rings about the large bell rod in a double bell blast furnace charging system become worn, a new seal is established about the large bell rod above the worn seal with- out requiring shutdown of the furnace or removal and replacement of the worn seal and bell rod. This is achieved by forming an enclosure in situ about the large bell rod directly above the worn packing to entrap leakage past the worn packing in the enclosure, and by providing a new seal assembly including new packing rings about the large bell rod in the upper end of the enclosure where the large bell rod emerges. The upper end portion of the enclo- sure is secured relative to the large bell rod by brackets and projecting outwardly from the enclosure to a point where they are fastened to hanger rods conventionally utilized to raise and lower the small bell rod. Preferably, the half sections of the enclo- sure are manufactured in a plurality of vertical sections secured and sealed together one above the other in serial fashion about the bell rod.
279234
Chadwick Ronald M.
Shearlock David A.
Johnson & Hicks
National Steel Corporation
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