Method and apparatus for oxidizing pulverous fuel with two gases having different oxygen contents
CA 2097239 C · Owner: Kaasinen, Pentti Juhani · Inventors: Kaasinen, Pentti Juhani; Lilja, Launo Leo; Makitalo, Valto Johannes
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 method for oxidizing the pulverous fuel of a furnace advantageously a, flash smelting furnace by means of a burner. The oxidation, takes place mainly owing to an effective mixing of two different combustion gases, pulverous fuel and an optional supplementary fuel in the furnace. The combustion gases are conducted into the furnace in separate flows so that oxygen, is fed in through the center in an at least partly turbulent flow, and air is fed around the oxygen flow in several separate flows. The invention also relates to a burner for mixing and burning pulverous fuel and combustion gas in 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
- Filed May 28, 1993 and granted July 7, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 28, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 28, 2015.
- 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
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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.