Method for manufacturing chromium-bearing pig iron
CA 1308917 C · Owner: Matsuura, Masahiro · Inventors: Ohno, Yotaro; Fukuyo, Hiroshi; Matsuura, Masahiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for manufacturing a chromium-bearing pig iron comprises the steps of charging cold bond pellets iron ore and coke lumps into a blast furnace from above and blowing a gas containing more than 50 % oxygen therein and tuyere nose flame temperature control agent into the blast furnace through the tuyere, the cold bond pellets being comprised of powdered chromium ore and powdered coke as principal feed materials. The cold bond pellets are manufactured by performing a mixing a, pelletizing and a curing step. The tuyere nose flame temperature control agent is a top gas steam, water or, CO2, which is used to control the flame temperature to 2000 to 2900°C.
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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 October 20, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 20, 2009.
- 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.