Method of producing stainless molten steel by smelting reduction
CA 1340922 C · Owner: Tanabe, Haruyoshi · Inventors: Inoue, Shigeru; Tanabe, Haruyoshi; Iwasaki, Katsuhiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention is concerned with a method of producing stainless molten steel by smelting reduction in a smelting reduction furnace provided with a bottom tuyere, a side tuyere and a top lance having a first outlet and a second outlet. The method of the invention comprises the steps of a) reducing raw chromium ore in the furnace by use of carbonaceous material to produce chromium molten metal at the bottom of the furnace and having slag above the molten metal; b) blowing CO and/or inert gas through the bottom tuyere into the molten metal to cause agitation thereof; c) blowing CO and/or inert gas through the side tuyere into the molten metal so as to contact the agitated molten metal; d) …
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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 March 7, 2000. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 7, 2017.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.