Electric arc furnace operation
CA 1105972 A · Owner: Falconbridge Nickel Mines Limited · Inventors: Corrigan, James H.; Jahnsen, Egil J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved method is described for the continuous shielded arc melting of calcine in an electric arc furnace to obtain molten slag, underlain by molten metal. The furnace is so operated that the major portion of the total energy supplied thereto is released in the arc and, the minor portion in the molten bath. The improvement consists of adjusting the electrical energy released in the bath, directly to obtaining a required active bath area calculated by means of the rate of change in the volume of the slag and indirectly to the silica:magnesia ratio in the slag. The optimum range of active bath area is derived from conditions required for the safe and continuous operation of the furnace, …
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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 July 28, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 28, 1998.
- 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.