Steel slag and ferriferous material reprocessing process useful to produce pig iron and environmentally compatible slags
CA 2271489 A1 · Owner: Holcim Ltd. · Inventors: Edlinger, Alfred
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a process for reprocessing steel slags and ferriferous materials such as, for example, electric furnace and converter slag fine ore, dust from steel , production rolling mill scales, and for producing pig iron and environmentally compatible slags, the ratio between the volumes of molten slag and iron bath is selected to be higher than 0.5 to 1 preferably of between , 0.8:1 and 1.5:1 and SiO2-bearing materials, such as, for example foundry or , steel plant sand and/or fine ore are added in order to adjust the slag ratio (CaO/SiO2) between 1.0 and 1.8, preferably between 1.2 and 1.8 with an Al2O3 , content of between 10 and 25 wt. % with respect to the slag. At the same time, hot wind …
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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 September 8, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 8, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 8, 2020.
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Timeline
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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.