细粒煤泥高效分级脱水提质工艺优化  

Optimization of the high-efficiency graded slime dewatering process for upgrading fine coal slime

作　　者：樊京念 张承卫 刘先建 FAN Jingnian;ZHANG Chengwei;LIU Xianjian(Shandong Qufu Xianzhuo Eletrical&Mechanical Technology Co.Ltd.,Zibo 255000,China)

机构地区：[1]山东先卓机电科技有限公司,山东淄博255000

出　　处：《选煤技术》2021年第1期181-186,共6页Coal Preparation Technology

摘　　要：提出了一种新的细粒煤泥分级脱水提质工艺,该工艺利用沉降过滤式离心机的分级沉降和过滤脱水的功能特点,通过设计选型和运行参数设定实现分级截流粒度调节,使粗粒级煤泥在降灰和脱水方面得到更好的指标,经过分级截流后的细煤泥由快开隔膜压滤机完成最终脱水回收。该工艺对于入料煤泥的灰分与粒度波动有较大的适应性,能够实现煤泥的分质利用,并降低基建投资,提高运行经济性,为现有细煤泥脱水工艺的升级改造和新建项目的煤泥提质工艺选择提供了一个新的途径。A new process for dewatering classified fine coal plime is proposed.The screen-bowl dewatering centrifuge incorporates the special merits of both the basket and solid-bowl centrifuges.Through design and selection of equipment and operating parameters,the process can perform both sizing and dewa-tering functions to reduce the ash and moisture of coarse slime for improved specifications while the fine slime retained through classification is sent to quick-open membrane press for final dewatering and recovery.The process is highly adaptable to variation of ash and size of slime feed and its use can make it possible to utilize the dewatered fine coal products according to quality,curtail initial capital cost,and improve economic indicators of dewatering operation.The proposed process proves to be a new solution for upgrading of fine coal dewatering process and also a new option for selection by both existing and new coal preparation plants.

关 键 词：煤泥脱水 分级脱水提质工艺 沉降过滤式离心机 快开隔膜压滤机 产品水分 

分 类 号：TD946.2[矿业工程—选矿]