Metallurgical apparatus – Having means for contacting a solid metalliferous material... – With heating means – e.g. – flame contact
Patent
1975-05-19
1976-10-05
Envall, Jr., R. N.
Metallurgical apparatus
Having means for contacting a solid metalliferous material...
With heating means, e.g., flame contact
13 35, 266240, 432156, 432262, F27B 1402
Patent
active
039846130
ABSTRACT:
A direct arc electric furnace having a tiltable base for pouring molten metal from the furnace. A refractory lined hearth supported by the base is pivotal with respect to the base for tilting to a degree greater than that capable by the base. The furnace includes shell refractory lining material supported upon the hearth encompassed by a removable shell. Replacement of the shell lining is accomplished by removing the shell, collapsing the shell lining into the hearth, and tilting the hearth with respect to the base sufficiently to dump the collapsed lining from the hearth into the pit adjacent the furnace. Further, the use of the tilting and removable hearth permits the hearth to be removed from the base, inverted in the pit, and the refractory lining of the hearth may then be readily removed for replacement purposes.
REFERENCES:
patent: 3790338 (1974-02-01), Duca
patent: 3871632 (1975-03-01), Wunsche
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