超细颗粒特性及其对成浆性能的影响  

Ultrafine Particle Characteristics and Their Influence on SlurryForming Properties

作　　者：宋方林 郑明东 刘涛[1,2] 陈岩 桂国阳 SONG Fanglin;ZHENG Mingdong;LIU Tao;CHEN Yan;GUI Guoyang(School of Chemical Engineering,Anhui University of Science and Technology,Huainan 232001,China;Anhui Provincial Institute of Mordern Coal Processing Technology,Anhui University of Science and Technology,Huainan 232001,China)

机构地区：[1]安徽理工大学化学工程学院,安徽淮南232001 [2]安徽理工大学安徽省现代煤炭加工技术研究院,安徽淮南232001

出　　处：《煤炭技术》2024年第9期272-277,共6页Coal Technology

基　　金：安徽省现代煤炭加工技术研究院开放基金重点项目(MTY202201)。

摘　　要：从表面含氧官能团和孔隙结构来揭示了超细颗粒的理化特性,并且探究了超细颗粒加入后,对浆体浓度和成浆性能的影响。采用ZN煤(粒径为80~70μm)成浆浓度为68%,随着超细颗粒(<10μm)的加入,所制成的水煤浆浓度达到71%。改变加入超细颗粒的占比,通过测量其黏度-剪切速率和Zeta电位变化发现,适量超细颗粒加入能够改善水煤浆的流变特性和稳定性。使用BET和SEM对超细颗粒的孔隙结构和浆体表面的微观形貌分析发现,超细颗粒的比表面积相对较大,颗粒接近于球形,有利于整个浆体的流动性能,并且能够改善水煤浆的聚沉现象等。The physicochemical properties of ultrafine particles were revealed from the surface oxygencontaining functional groups and pore structure,and the effects of ultrafine particles on slurry concentration and slurry properties were explored.The slurry concentration of ZN coal(particle size of 80-70μm)is 68%,and with the addition of ultrafine particles(<10μm),the concentration of coal water slurry made reaches 71%.By measuring the viscosity-shear rate and zeta potential changes,it was found that the rheological properties and stability of coal-water slurry could be improved by measuring the proportion of ultrafine particles.The pore structure of ultrafine particles and the microscopic morphology analysis of the surface of the slurry using BET and SEM showed that the specific surface area of the ultrafine particles was relatively large,and the particles were close to spherical,which was conducive to the flow properties of the whole slurry,and could improve the aggregation and sedimentation of coal-water slurry.

关 键 词：水煤浆 超细颗粒 理化特性 成浆性 

分 类 号：TQ536[化学工程—煤化学工程]