CPAM离子度对高泥化煤泥水沉降特性的影响研究  

Research on influence of CPAM ionic degree on settling characteristics of high muddied coal slime water

作　　者：樊有林 常艇 张锦龙 徐宏祥[2,3] 崔家画 田汉 尹亚男 FAN Youlin;CHANG Ting;ZHANG Jinlong;XU Hongxiang;CUI Jiahua;TIAN Han;YIN Yanan(Coal Preparation,China Energy Baotou Energy Co.,Ltd.,Ordos 017000,China;School of Chemical and Environmental Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China;Guangxi Huaxi Group Co.,Ltd.,Liuzhou 545000,China)

机构地区：[1]国能包头能源有限责任公司煤炭洗选中心,内蒙古鄂尔多斯017000 [2]中国矿业大学(北京)化学与环境工程学院,北京100083 [3]广西华锡集团股份有限公司,广西柳州545000

出　　处：《煤炭科学技术》2023年第3期251-260,共10页Coal Science and Technology

基　　金：中国博士后科学基金资助项目(2020M673551XB);中国矿业大学(北京)越崎青年学者资助项目(2020QN08);中央高校基本科研业务费优秀青年专项资助项目(2020YQHH02)。

摘　　要：为研究不同离子度阳离子型聚丙烯酰胺(CPAM)对高泥化煤泥水的沉降特性与作用机理,使用李家壕选煤厂高泥化煤泥水研究对象,对其进行了粒度粒度组成和矿物组成等性质的研究。运用煤泥水絮凝沉降试验方法研究了CPAM的离子度对高泥化煤泥水沉降速度、澄清区浊度、压缩区厚度以及沉降动力学的影响。测试了煤泥颗粒表面Zeta电位,分析了不同离子度CPAM对煤泥颗粒Zeta电位的影响规律。使用Turbiscan Lab稳定性分析仪对不同离子度条件下的煤泥水稳定性进行了研究。基于煤泥水沉降特性和动力学稳定性分析了CPAM离子度对煤泥水的沉降作用机理。研究结果表明:煤泥水中大量易泥化难沉降的高岭石颗粒和高细颗粒含量是煤泥水难沉降的主要原因。相同用量下,离子度较低时,CPAM对煤泥水的沉降效果较差;离子度高时煤泥水沉降速度较低,压缩区厚度较高,浊度较低;离子度较高时,煤泥水的沉降效果好,其中离子度为30%~60%的CPAM在用量为36 g/m^(3)时,煤泥水的沉降效果最好,沉降速度快、浊度低、压缩区厚度薄。CPAM离子度对煤泥水沉降效果和稳定性有很大的影响。CPAM因其长链上含有带正电的活性基团易与带负电煤泥颗粒表面的吸附,能够降低颗粒表面的Zeta电位值,促进煤泥水沉降过程中絮团的形成,加快沉降速度,降低煤泥水稳定性和煤泥水沉降后的浊度,与煤泥水作用原理为“电性中和”“吸附架桥”和“网捕卷扫”,是一种性能优良的煤泥水处理药剂。In order to study the sedimentation characteristics and action mechanism of cationic polyacrylamide(CPAM)with different ionic degrees on the high muddied coal slime water,the particle size composition and mineral composition of the high muddied coal slime water from Lijiahao Coal preparation Plant were studied.The influence of ionic degree of CPAM on sedimentation velocity,turbidity of clarification zone,thickness of compression zone and sedimentation kinetics of high muddied coal slime water was studied by using the experimental method of flocculation sedimentation of coal slime water.Zeta potential on the surface of slime particles was measured,and the effect of CPAM with different ionic degree on the zeta potential of slime particles was analyzed.The stability of coal slime water un der different ionic conditions was studied by using Turbiscan Lab stability analyzer.Based on the sedimentation characteristics and dynamic stability of coal slime water,the sedimentation mechanism of CPAM ion degree on coal slime water was analyzed.The results show that large amount of kaolinite particles and high content of fine particles are the main reasons for the difficult settlement of coal slime water.Under the same dosage,CPAM has a poor sedimentation effect on coal slime water when the ionic degree is low.When the ionic degree is high,the sedimentation velocity of coal slime water is lower,the thickness of compression zone is higher,and the turbidity is lower.The sedimentation effect of coal slime water is good when the ionic degree is high,and CPAM with ionic degree 30%-60%has the best sedimentation effect when the dosage is 36 g/m^(3),with fast sedimentation speed,low turbidity and thin compression zone thickness.CPAM has great influence on the sedimentation effect and stability of coal slime water.CPAM can reduce the Zeta potential value on particle surface,promote the formation of flocs in the sedimentation process of slime water,accelerate the sedimentation speed,reduce the stability of slime water and turbidity afte

关 键 词：离子度 高泥化煤泥水 阳离子型聚丙烯酰胺 沉降特性 稳定性 

分 类 号：TD94[矿业工程—选矿]