Specialized metallurgical processes – compositions for use therei – Processes – Producing or treating free metal
Patent
1992-05-07
1993-09-14
Andrews, Melvyn J.
Specialized metallurgical processes, compositions for use therei
Processes
Producing or treating free metal
75577, 75581, C21B 1100
Patent
active
052444902
ABSTRACT:
A method of making iron involves using waste polymer material as a solid fuel charged to an iron melting vessel and/or using gaseous decomposition products from pyrolysis of waste polymer material as a gaseous fuel supplied to the vessel. Relatively large quantities of waste polymer materials can thereby be disposed of without landfill usage, while a substantial portion of their energy value is recovered for heating and melting the iron-bearing material in the vessel. The waste polymer material may comprise reaction injection molding compounds and precursors thereof, sheet mold compounds and precursors thereof, car fluff (i.e., non-metallic residue from the recycling of automobiles), scrap rubber tires and the like. Waste sheet molding compounds including calcium carbonate filler can be charged to the iron-making vessel such that the calcium carbonate therein is released and functions as a flux at the iron-making temperature involved to remove impurities from the iron. As a result, limestone additions to the vessel can be reduced or eliminated.
REFERENCES:
patent: 3346417 (1967-10-01), Ehrlich
patent: 3656735 (1972-04-01), Eliot
patent: 3821026 (1974-06-01), Swartz
patent: 3909446 (1975-09-01), Miyashita et al.
patent: 3983009 (1976-09-01), Neal et al.
patent: 4014681 (1977-03-01), Rhinehart
patent: 4091825 (1978-05-01), Baker
patent: 4175949 (1979-11-01), Breznay
patent: 4412889 (1983-11-01), Oeck
patent: 4439209 (1984-03-01), Wilwerding et al.
patent: 4647443 (1987-03-01), Apffel
patent: 5129995 (1992-07-01), Agarwal
patent: 5198018 (1993-03-01), Agarwal
"Shrinking the Old-Tire Mountain: Progress Slow", The New York Times, May 9, 1990.
"Gas Injection-Lowers Cupola Melting Costs, Increases Melting Rates", Foundry, 1969.
AFS Cupola Handbook, 4th edition, 1975, pp. 2-3, 9-10, 22, 425.
Andrews Melvyn J.
General Motors Corporation
LandOfFree
Iron making method using waste polymer material does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Iron making method using waste polymer material, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Iron making method using waste polymer material will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2023716