Anthracite duff | Article about anthracite duff by The Free Dictionary
anthracite duff[′an·thrə‚sīt ‚dəf]
In Wales, fine anthracite screenings used in briquets or mixed with bituminous coal to fuel cement kilns on chain grate stokers.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive
A generator that was able to burn anthracite duff
[that part of anthracite that does not meet the premium market specification] and generate electricity.