F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
F27D1/00—Casings; Linings; Walls; Roofs
F27D1/18—Door frames; Doors, lids or removable covers
F27D1/1808—Removable covers
F27D1/1816—Removable covers specially adapted for arc furnaces
C—CHEMISTRY; METALLURGY
C21—METALLURGY OF IRON
C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
F27B13/00—Furnaces with both stationary charge and progression of heating, e.g. of ring type or of the type in which a segmental kiln moves over a stationary charge
F27B13/06—Details, accessories or equipment specially adapted for furnaces of this type
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General Engineering & Computer Science
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Physics & Mathematics
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Thermal Sciences
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Crystallography & Structural Chemistry
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Materials Engineering
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Metallurgy
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Heat Treatments In General, Especially Conveying And Cooling
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