Method for treatment of dust recovered from off gases in metallurgical processes
CA 1297301 C · Owner: Elkem A/S · Inventors: Pedersen, Thor; Aune, Jan A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, The method for treating the dust entails the following steps:, (a) supplying a combination of dust a reducing, agent and flux to a gastight electrothermic smelting furnace, (b) smelting, reducing and volatilizing certain metals in the smelting furnace, (c) tapping of an inert slag phase and a liquid metal phase from the smelting furnace, (d) continuous removal from the smelting furnace of a gas phase containing chiefly CO-gas metal fumes, sulphur, chlorides and fluorides together with entrained unreacted dust, (e) further treatment of the gas phase. The process produces an inert slag phase which can be safely deposited in a landfill. The process also allows for …
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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 March 17, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 17, 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.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.