F - Mech Eng,Light,Heat,Weapons – 27 – B
Patent
F - Mech Eng,Light,Heat,Weapons
27
B
F27B 3/06 (2006.01) C21C 5/52 (2006.01) F27B 3/19 (2006.01)
Patent
CA 2111756
ABSTRACT OF THE DISCLOSURE The invention relates to a tilting device for a DC arc furnace and a procedure for completely emptying the furnace while it is being continuously charged with scrap through a lateral opening (15) in the furnace vessel (1), and while simultaneously maintaining a sump. The scrap chute (14) should remain at the opening (15) in the furnace during continuous charging, melt-down, deslagging and steel tapping operations and should be swivelled away only when the furnace has to be completely emptied. By means of the tilting device according to the invention, in which a cam (10) is mounted on the rolling cradle (4), the roll centre point (5a) remains in the zero position in a tilt range from ? 5° to ? 15° and it is displaced to a new position (5b), in parallel with the bottom-mounted taphole (2a), only when the furnace is completely emptied. The position of the bottom-mounted taphole (2b, 2c) should change only slightly in a tilting range up to, for example, ? 10° (steel tapping) and a tilting range up to ? 25° (sump tapping), in order to protect the parts of the bottom electrode (13) located outside the furnace vessel (1) from the heat radiating from the steel in the steel casting ladle (11).
Gowling Lafleur Henderson Llp
Man Gutehoffnungshutte Ag
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