热力发电2017，Vol.46Issue(5)：14-20,7.DOI:10.3969/j.issn.1002-3364.2017.05.014
褐煤干燥与破碎特性研究现状
Research status of drying and crushing characteristics of lignite
摘要
Abstract
To reduce the energy cost during pulverizing process of lignite,the previous researches were summarized.It pointed out that several factors could influence the grindability of the lignite,such as the moisture content,petrographic composition and geographical conditions.The moisture content is considered as the major reason for poor grandability of the lignite,the higher the moisture content,the poorer the lignite's grindability.So the most effective method to improve the lignite's grindabilty is drying it.However,during the drying process,the pore structure and specific surface area of the lignite will change.The cracks created by moisture precipitation are most likely the main reason in explaining the increasing of the coal grindability as a result of the drying process.On this basis,the grindability of microwaving exposed coals and conventionally heating coals were compared.The results show the microwave heating has the advantages of fast drying rate,short drying time and high energy utilization efficiency.Finally,the evaluation indexes of coal grinding were discussed and the shortage of HGI was figured out.Some new evaluation indexes based on fractal theory and others were also introduced.关键词
褐煤/水分/干燥/可磨性/破碎特性/微波Key words
lignite/moisture/drying/grindability/breakage characteristics/microwave分类
能源科技引用本文复制引用
杨雨濛,刘建忠,何翔,王智化,周俊虎,岑可法..褐煤干燥与破碎特性研究现状[J].热力发电,2017,46(5):14-20,7.基金项目
国家重点基础研究发展计划(973计划)(2012CB214906)National Basic Research Program of China (973 Program) (2012CB214906) （973计划）
