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U.S. Department of Energy
Office of Scientific and Technical Information

Method of and apparatus for drying and preheating coking coal in a flight stream tube

Patent ·
OSTI ID:6294153
A method and an apparatus are disclosed for drying and preheating coking coal particles of mixed sizes in a flight stream tube. A stream of hot gas in which different-size particle fractions are entrained, is advanced through the tube. At one or more locations it is split up into two flows, one containing the smaller fractions and the other containing the coarser fractions. The coarser fractions are slowed and readmitted into the flow having the smaller fractions, counter to the direction of advancement of this flow.
Assignee:
Bergwerksverband Gmbh (Germany, Federal Republic Of); Didier Engineering Gmbh (Germany, Federal Republic Of)
Patent Number(s):
US 4380125
OSTI ID:
6294153
Country of Publication:
United States
Language:
English