Smelting-reduction apparatus, and method for producing molten pig iron using the smelting reduction apparatus
CA 2247311 C · Owner: Joo, Sang Hoon · Inventors: Joo, Sang Hoon; Cho, Min Young; Lee, Il Ock
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A smelting reduction apparatus and a method for producing molten pig iron are disclosed. Iron ore sintered or, pelletised iron are used, so that the discharge operation from a pre-reducing furnace (12) to a melter-gasifier (11) would not give any influence to the operation of the pre-reducing furnace (12). The apparatus consists of a pre-reducing furnace (12), a melter-gasifier (11), an ascending duct (13) for supplying the off-gas of the melter-gasifier (11) as a reducing gas to the pre-reducing furnace (12) via a cyclone (14) and a, recycling duct (14a, 15a) for the fine ore separated at said cyclone (14) to be spouted through a melter-burner (16) into the melter-gasifier (11). A part of …
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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
- Filed December 19, 1997 and granted October 22, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 19, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 19, 2019.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.