Drying and gas or vapor contact with solids – Process – Diverse types of drying operations
Patent
1999-12-06
2000-11-21
Wilson, Pamela A.
Drying and gas or vapor contact with solids
Process
Diverse types of drying operations
34508, 34210, 34230, F26B 700
Patent
active
061485438
ABSTRACT:
In the present method of drying iron ore pellets, e.g., magnetite pellets, moisture-containing iron ore pellets are formed into a bed comprising a multiplicity of the pellets. A current of drying gas is forced upwardly through the bed of pellets to at least partially dry some of the pellets. A plurality of pipes, each having an opening such as an elongated slot provides counter-current jets of a drying gas above the bed. The drying gas jets are directed downwardly so as to impinge on the upper surface of the bed through which the current of drying gas rises. The bed of pellets is thus dried with the current of drying gas flowing through the bed from below as well as the jets of drying gas impinging onto the upper surface of the bed. In a preferred form of the invention, in a second stage downwardly directed jets of drying gas are used together with a downward current of drying gas to further dry the pellets before they are fired.
REFERENCES:
patent: 2671968 (1954-03-01), Criner
patent: 3868245 (1975-02-01), Boss
patent: 3868246 (1975-02-01), Boss
patent: 3894344 (1975-07-01), Malcolm
Haas L.A. and K.W. Olson. Effects of Magnetite Oxidation on the Properties of Taconite Pellets. Paper in Proceedings of 64th Annual AIME Meeting (Duluth, MN, Jan. 16-17, 1991) SMME(AIME), 1991, pp377-394.
Haas L.A. et al. Use of Oxygen-Enriched Gas for the Oxidation of Acid and Fluxed Taconite Pellets. BuMines RI 9473, 1993, 15 pp.
Meyer K. Pelletizing of Iron Ores. Springer-Verlag Press, Berlin, Germany, 1980, pp. 24-37.
Meyer K.J.E. and H. Rausch. The Lurgi Pelletizing Process: A Combined Updraft-Downdraft Technique. J. of Metals, V.10, 1958, pp. 129-133.
Harmon James V.
Wilson Pamela A.
LandOfFree
Method and apparatus for drying iron ore pellets does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for drying iron ore pellets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for drying iron ore pellets will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1246619