Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1977-02-28
1978-07-11
Rosenberg, Peter D.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
75 24, 75 60, C21C 700, C21C 536
Patent
active
040999645
ABSTRACT:
A method for recycling iron values such as the iron which is present in the iron oxide, primarily Fe.sub.3 O.sub.4 found in millscale and other fine or waste materials containing oxides of iron. The method is applicable to basic oxygen refining operations wherein iron is charged to the basic oxygen furnace along with a flux. The method can also be applied to other iron or steel-making furnaces. In accordance with the invention, a portion of the flux charged to the furnace is prepared by forming a mixture of iron or iron containing particles with the balance comprising dolomite, the mixture including sufficient iron values such that the product after calcination will contain in excess of 20 percent and up to 50 percent by weight iron values, calculated as Fe.sub.2 O.sub.3. The mixture is heated in a kiln to a temperature in excess of 2000.degree. F. whereby reaction products such as calcium and magnesium ferrites are formed and make up a substantial portion of the mixture. The mixture is then introduced as a part of the flux utilized in the furnace, the mixture preferably comprising from 20 to 100 percent of the dolomitic lime which would normally be utilized in said flux charge.
REFERENCES:
patent: 3189436 (1965-06-01), Burstlein
patent: 3311465 (1967-03-01), Ban
patent: 3460934 (1969-08-01), Kelmar
patent: 3721548 (1973-03-01), Hodge
patent: 3754889 (1973-08-01), Dominguez
patent: 3771999 (1973-11-01), Fedock
patent: 3857698 (1974-12-01), Gilpin
Henery Maurice D.
Snyder Ernest B.
Walker Walter W.
Marblehead Lime Company
Rosenberg Peter D.
LandOfFree
Recycling of iron values does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Recycling of iron values, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Recycling of iron values will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-260094