Patent ID: 8770118

Claim:
An oxygen supplying apparatus of a melting furnace, the oxygen supplying apparatus comprising: a through hole formed in a wall of the melting furnace; an air cooling member having a pipe shape, passing through the through hole and extending inside and outside the melting furnace, the air cooling member having a first end and a second end, the first end being open to an outside of the melting furnace and allowing an outside air to enter into the air cooling member, the second end being closed in an inside of the melting furnace; an oxygen supplying member having a pipe shape and passing through the air cooling member, the oxygen supplying member being longer than the air cooling member and having a first end and a second end, the first end of the oxygen supplying member being open to introduce oxygen and extended out from the first end of the air cooling member, the second end of the oxygen supplying member being open to the inside of the melting furnace and extended out from the second end of the air cooling member, thereby allowing the oxygen to enter into the melting furnace; a plurality of connection units positioned between the air cooling member and the oxygen supplying member, the plurality of connection units fixing the oxygen supplying member in the air cooling member; a closing unit provided in the second end of the air cooling member, the closing unit closing an inside end of a space between an inner surface of the air cooling member and an outer surface of the oxygen supplying member such that the outside air entered into the space through the first end of the air cooling member circulates in the space; a lower fixing member mounted on an outer surface of the melting furnace, fixed on the outer surface of the melting furnace by a welding and having a hole in a center, the hole of the lower fixing member having a diameter greater than a diameter of the air cooling member such that an outer surface of the air cooling member does not directly contact with the inner surface of the hole of the lower fixing member, the hole of the lower fixing member being arranged to have the same central axis with the through hole of the melting furnace; and an upper fixing member mounted on the lower fixing member, fixed on the lower fixing member by a bolt and having a hole in a center, the upper fixing member fixing the air cooling member in the hole of the upper fixing member; a ring interposed between the lower fixing member and the upper fixing member to seal the melting furnace, wherein a diameter of the through hole of the wall of the melting furnace is greater than the diameter of the air cooling member such that the outer surface of the air cooling member does not directly contact with the inner surface of the through hole of the wall of the melting furnace, and wherein the space between the inner surface of the air cooling member and the outer surface of the oxygen supplying member includes only the connection units, and the oxygen supplying member includes nothing thereinside.