中细粒烟煤低温干燥特性研究  

Study on drying characteristics of medium-grained and fine bituminous coal at low temperature

作　　者：刘康雄 郭帆 郭亮亮 肖陆 LIU Kangxiong;GUO Fan;GUO Liangliang;XIAO Lu(Binxian Huabin fine Coal Co. Ltd., Xianyang 713500, China)

机构地区：[1]彬县华彬精煤有限公司,陕西咸阳713500

出　　处：《选煤技术》2021年第4期30-33,共4页Coal Preparation Technology

摘　　要：中、细粒烟煤干燥后水分复吸率比较低,有利于储存、运输和使用。为了降低烟煤在利用过程中的能耗,提高其利用效率,采用鼓风干燥箱对中、细粒烟煤进行了干燥脱水试验,考查不同温度和时间对烟煤干燥脱水的影响,并探究了烟煤干燥后的水分复吸特性。结果表明:当干燥温度越高,同一粒级烟煤的水分损失越快,所需的干燥时间越短;当干燥温度在120~140℃时,水分损失的速率最快,且在该温度范围内粒度对水分损失的影响不大。The low moisture reabsorption rate of medium-grained and fine bituminous coal after being dried is beneficial to the storage,transport and utilization of such coal.In order to reduce the energy consumption and improve the utilization efficiency of the coal,test is made on drying of the coal using the blast drying box,with an aim to explore the influence of drying temperature and time in the drying process,and the moisture reabsorption characteristics of the dried coal.Test result shows that for the coal of the same size,the faster the reduction of moisture,the shorter the drying time is needed;at a temperature of 120~140℃,a fastest moisture reduction rate can be achieved,and in this temperature range,the size exerts a negligible effect on moisture reduction rate.

关 键 词：干燥脱水 烟煤干燥特性 干燥脱水试验 水分复吸试验 干燥温度 水分复吸率 

分 类 号：TD946[矿业工程—选矿]