C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
39/104
C22B 9/05 (2006.01) B22D 1/00 (2006.01) F27D 1/08 (2006.01)
Patent
CA 1230480
Abstract A gas plug for metallurgical vessels consists of a porous, gas-permeable brick of refractory material, a gas-tight partial encasing for the brick comprising a metal jacket extending around the lateral circumferential area of the brick and a metal cover for the outer face of the brick, and a pipe for supplying gas to a central gas inlet orifice of the metal cover. To prevent clogging of the brick in the gas outlet area and in order thereby to ensure purge readi- ness, a constricted cross-section is provided in the gas supply pipe at a distance from the gas inlet orifice of the metal cover, there being provided in the pipe between the metal cover and the constricted cross-section a closure body, which is movable at least in the axial direction of the gas supply pipe and is, for example, a copper ball or the like, the cross-section of which is smaller than the inside diameter of the gas supply pipe and greater than the constricted cross-section. The closure body, together with the constricted cross-section, thereby forms a non-return valve, which prevents a pressure drop occurring in the brick after switching off the gas supply.
467068
Radex Deutschland Aktiengesellschaft Fur Feuerfeste Erzeugnisse
Ridout & Maybee Llp
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