F - Mech Eng,Light,Heat,Weapons – 27 – B
Patent
F - Mech Eng,Light,Heat,Weapons
27
B
307/16
F27B 14/06 (2006.01) B22D 41/00 (2006.01) C21C 5/52 (2006.01) C21C 7/00 (2006.01)
Patent
CA 1270503
Ladle Furnace Abstract of the Disclosure The specification discloses a ladle furnace apparatus for refining molten steel tapped from a steelmaking furnace therein. There are introduced molten steel and a slag making material into the ladle. The outer and inner lids of the ladle furnace are put on the respective receiving surfaces of the ladle to close the opening thereof. In the interior of the ladle. the slag making material is slagged by arc heating thereby to refine mol- ten steel introduced therein by means of the slag. During the refining process. the suction of gas is carried out from a space formed between the outer lid and the inner lid. Therefore. a dust containing gas generated by reaction of the molten steel and slag enters the space between the outer lid and the inner lid passing through a gas formed between the inner lid and the ladle or electrode holes disposed in the inner lid to be sucked therefrom. Even if the open air enters the apparatus through a gap between the outer lid and the ladle. the open air does not flow inside of the inner lid. Therefore. It is possible to prevent the temperature of slag from being lowered due to the open air. In addition, it is also possible to prevent the refin- ing efficiency of slag on the molten steel from being lowered. Consequently, refining on the molten steel can efficiently be performed.
501591
Daidotokushuko Kabushikikaisha
Robic Robic & Associes/associates
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