Metallurgical apparatus – Means for holding or supporting work – Receptacle
Patent
1976-02-13
1977-04-05
Roethel, John E.
Metallurgical apparatus
Means for holding or supporting work
Receptacle
294 81R, C21C 700
Patent
active
040158349
ABSTRACT:
The disclosed horizontally divisible furnace shell comprises a spherically shaped bottom section and truncated cone cover-like shaped middle and top wall sections stacked upon the bottom section, the form of the middle and top sections resulting in barrel-shaped shell walls. Each of the three modular sections has a metal casing with a refractory lining which may be made of firebrick or fireclay. Each wall section has an inwardly projecting ledge at its lower end for supporting the refractory lining. For interconnecting and aligning the sections, tapered locating pins and sockets are provided between all sections. Water-cooled flanges are preferably provided at the upper and lower ends of the top wall section. The joint between the middle and top wall sections is stepped upwardly adjacent the pouring spout so that such joint will be above the level of the molten metal, even when the furnace is tilted to pour out the metal. The middle wall section is provided with a molten metal discharge opening and a pouring spout extending outwardly beneath such opening. At least one slag discharge opening is formed in the middle and top wall sections. Modular removable water-cooled members are provided along the sides and the top of such slag discharge opening. A movable water-cooled heat resistant door is provided to close the slag discharge opening. Beneath the slag discharge opening, the middle wall section is provided with an apron which preferably has refractory material in the form of graphite blocks to prevent the slag from adhering to the apron. The bail for lifting and transporting the separate modular shell sections has a non-symmetrical shape and adjustable links, such shape being adapted to accommodate the middle and top wall sections, which have different lifting point locations and different centers of gravity. Using the lifting bail, the entire middle or top wall section, complete with its refractory lining, may then be lifted from the furnace or into place on the furnace. Thus, the worn-out refractory lining may be removed from the shell section, and the new lining may be installed when the wall section is dismounted from the furnace. It is preferred to provide spare wall sections so that they can be fitted with new refractory linings while the furnace is operating. The replacement of the used wall section or sections having worn-out refractory linings with the spare wall section or sections having new refractory linings may be performed quickly, with only a short shutdown of the furnace.
REFERENCES:
patent: 3749388 (1973-07-01), Cook et al.
Engineered Metal Products Company, Inc.
Roethel John E.
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