作者: John J. Simmons
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摘要: Low rank coals including lignite, brown and sub-bituminous coals, peat containing unacceptably high quantities of water are dried enriched in BTU content. The mined low coal is crushed to between about one-half inch three inches diameter immersed hot oil dry the coal. then screened or centrifuged remove excess resulted impregnated has a much higher may be powdered utilized form coal-water liquid fuel.