中国动力煤分选工艺现状及展望

为提高动力煤入选比例,阐述了动力煤的分选特点,对比分析了干选、跳汰机排矸、块煤重介质排矸+末煤不入选、全级三产品重介质旋流器分选工艺、重介质浅槽排矸+重介质旋流器排矸5种常用动力煤分选工艺的优缺点和适用范围。提出分选动力煤时应采用简单工艺,提高自动化水平,选用单台处理能力大、高效节能、节水设备,降低基建投资,减少生产成本。最后对中国动力煤分选工艺进行展望,提出规模大型化、生产高效化、设计通用化和模块化是动力煤分选的发展趋势。此外还应研究千万吨级动力煤选煤厂分选系统单元化的块煤分选、末煤分选、细粒煤分选的大型高效成套技术和关键装备,并开发与之配套的大型分级破碎、脱水、脱介等辅助设备,为建设千万吨级高效自动化动力煤选煤厂提供技术装备。

Present situation and prospect of steam coal separation in China

In order to improve the separation proportion of steam coal, introduce the separation features. Optimize process of separating steam coal by the contrasting dry coal preparation,discharge of refuse by jigging,discharge of refuse from lump coal by dense medium sepa-ration without small coal feed,three products H.M.cyclone separation of all raw coal and discharge of refuse by H.M.vessels and cyclone. It is necessary to select energy-efficient and water saving equipment with large capacity of unit to reduce cost of production and capital in-vestment.Provide that large-scale,efficiency,generalized and modularization is the development tendency.Introduce large-scale efficient packaged technologies and key equipments used for the separation of lump coal,slack coal and fine coal in ten-million-ton steam coal sep-aration.Meanwhile,develop matching large-capacity sizing crusher and medium drainage or dehydration equipments.