Si contained ferroalloy addition as a weak pre-deoxidation process in steelmaking
CA 1249724 A · Owner: China Steel Corporation · Inventors: Seng-Jung, Chen; Li-Jung, Hu; Maw-Cheng, Shieh
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a Weak Pre-Deoxidation Process (abbreviated as W.P.D. process) for producing Alkilled and/or Ti-Killed steel. In this process the proper amount of Si-containing ferro-alloy is added into molten steel during tapping, as Weak Pre-Deoxidation then the ladle is, transferred to Al-Wire feeder system or ladle injection treating equipment to proceed final stage of deoxidation. Not only can the recovery rate of deoxidizer be increased by this new process, but also the cleanliness as well as surface and internal quality of products are effectively improved. Besides the production cost will be reduced due to less deoxidizer addition, less billet conditioning cost less …
Read the whole patent
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 February 7, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 7, 2006.
- 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.