Bottom-blown gas blowing nozzle for molten metal refining furnace and steel refining method using the same
CA 1209807 A · Owner: Nippon Kokan Kabushiki Kaisha · Inventors: Nimura, Yoichi; Hasegawa, Teruyuki; Miyawaki, Yoshiharu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A Nozzle used to introduce a bottom-blown gas into a molten metal refining furnace so as to minimize the lower limit value of the rate of blowing gas flow. The nozzle includes a refractory (1) having a plurality of small holes (2) having an inner diameter of from 0.5 to 3.0 mm formed from its working surface to its back a metal, cover (3) enclosing at least a part of the sides of the refractory (1) and a pressure box (4) formed in the bottom of the refractory (1) so as to communicate with the holes (2) and define a gas reservoir space. Due to the small diameter of the holes (2), the molten metal is prevented from entering the pressure box (4) through the holes (2) when the blowing gas …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted August 19, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 19, 2003.
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Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.