破碎煤矸石粒度与热值分布研究

Research on particle size and calorific- value distribution of crushed coal gangue

通过研究不同方式破碎煤矸石中存在的热值随粒度减小而增大的现象,分析了破碎煤矸石粒度与热值分布间的相互关系。结果表明,煤矸石破碎后,不同粒级发热量随粒度变化而重新分布,呈负相关关系,且细粒级比粗粒级发热量提高1倍以上,为煤矸石的破碎分选提供了依据。

By studying the phenomenon that calorific value increases with the particle size reduction of coal Gangue by crushing in different ways, the paper analyzes the relationship between particle size and calorific - value distribution of crushed coal gangue. The results show that calorific - value of dif- ferent size fractions redistribute with granularity changes, presented negative correlation ; while the calorific value of fine- grained level increases by more than 1 times than coarse fraction, the results could provide the technological base of crushing and separation of coal gangue.