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中国煤炭学会首届选煤学术交流会于1979年10月11—15日在唐山市举行。参加会议的有来自教育、科研、设计、生产及领导机关等84个单位175名代表。会议期间交流的学术论文共有60篇。交流了近年来在选煤理论、新设备、新工艺等方面所取得的研究成果。唐山研究所陈迹工程师在《重力场中颗粒材料的分层规律》一文中,提出了等压强同层位重选分层规律,论证了决定颗粒在水中存在状态的根本因素是压强,在水流运动中压强相
The first Coal Symposium of China Coal Society was held in Tangshan City on October 11-15, 1979. Attending the conference were 175 representatives from 84 units including education, scientific research, design, production and leadership organs. There are 60 academic papers exchanged during the conference. Exchanged in recent years in the coal preparation theory, new equipment, new technology and other aspects of the research results achieved. In the article “Stratification Law of Particulate Materials in Gravity Field”, the engineer of Tangshan Institute proposed the stratification rule of isobaric re-selection with the same layer, and demonstrated that the fundamental factor that determines the existence state of particles in water is pressure, Medium pressure phase