基于FBRM技术的高岭土、石英和煤颗粒动态絮凝沉降过程研究  

Research on the dynamic flocculation and sedimentation process of kaolin,quartz and coal particles based on FBRM technology

作　　者：白来平 袁帅 袁雪 卜祥宁[2,3] 孙玉金 沙杰 BAI Laiping;YUAN Shuai;YUAN Xue;BU Xiangning;SUN Yujin;SHA Jie(Shaanxi Xineng Coal Prapartation Technology Co.,Ltd.,Xi’an,Shaanxi 710100,China;Key Laboratory of Coal Processing and Efficient Utilization,Ministry of Education,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China;School of Chemical Engineering,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China;School of Mining Engineering,Taiyuan University of Technology,Taiyuan,Shanxi 030024,China)

机构地区：[1]陕西新能选煤技术有限公司,陕西省西安市710100 [2]中国矿业大学煤炭加工与高效洁净利用教育部重点实验室,江苏省徐州市221116 [3]中国矿业大学化工学院,江苏省徐州市221116 [4]太原理工大学矿业工程学院,山西省太原市030024

出　　处：《中国煤炭》2025年第4期144-159,共16页China Coal

基　　金：山西省应用基础研究计划面上青年基金项目(201901D211039)。

摘　　要：煤泥水是选煤厂生产过程中产生的废水,含有大量的悬浮固体和有害物质,实际生产中煤泥颗粒的絮凝沉降是在动态过程中进行的,因此探究药剂与不同矿物颗粒的动态作用具有重要的意义。利用聚焦光束反射测量(FBRM)技术,探究Mg^(2+)离子和阴离子聚丙烯酰胺(APAM)药剂对高岭土、石英和煤样颗粒絮凝过程的影响及作用机理。通过实验发现,单独加入Mg^(2+)离子或低浓度的APAM可以使3种颗粒的数量减少、平均弦长(MCL)增加,颗粒发生凝聚或絮凝现象,但形成的聚团并不稳定,容易发生破裂。Mg^(2+)离子与APAM共同作用效果显著优于单独作用,能够形成更稳定的絮团,并导致颗粒数量缓慢降低。此外,提高APAM浓度对不同矿物的影响存在明显差异,高岭土颗粒几乎全部沉降,而石英颗粒的絮凝现象不明显,最终煤样颗粒的数量大幅减少。然而,提高Mg^(2+)离子浓度对3种矿物颗粒的絮凝沉降影响很小。研究深入揭示了Mg^(2+)离子和APAM在絮凝过程中的作用机理,以及对颗粒数量、粒径的影响,结果表明Mg^(2+)离子和APAM在絮凝过程中的相互作用和影响差异,可为优化煤泥水处理工艺提供参考。Coal slurry,byproduct of the coal preparation process,contains a high concentration of suspended solids and hazardous substances.In practical production,the flocculation and sedimentation of coal particles occur in a dynamic process,making it essential to investigate the dynamic interaction between additives and different mineral particles.This research investigates the effects and mechanisms of Mg^(2+)ions and anionic polyacrylamide(APAM)on the flocculation of kaolin,quartz and coal particles using real-time monitoring technology called FBRM(focused beam reflectance measurement).Experimental results show that the addition of Mg^(2+)ions or low concentrations of APAM alone reduces the quantity of the three types of particles and increases the mean chord length(MCL),leading to particle aggregation or flocculation.However,the formed flocs are not stable and prone to breakage.The combined action of Mg^(2+)ions and APAM significantly outperforms their individual effects,resulting in more stable flocs and a gradual reduction in particle quantity.Additionally,increasing APAM concentration has varying effects on different minerals,almost all kaolin particles settle,while the flocculation of quartz particles is minimal,ultimately leading to a significant decrease in coal particle quantity.Conversely,increasing the Mg^(2+)ion concentration has a minimal impact on the flocculation and sedimentation of the three mineral particles.This study provides detailed insights into the mechanisms of Mg^(2+)ions and APAM in the flocculation process and their effects on particle quantity and size.The findings underscore the interaction and differential effects of Mg^(2+)ions and APAM in the flocculation process,offering important references for optimizing coal slurry treatment processes.

关 键 词：煤泥水 絮凝过程 处理和沉降 FBRM 聚丙烯酰胺 

分 类 号：TD94[矿业工程—选矿]