工程科学学报，第38卷，第3期：299-305,2016年3月 Chinese Journal of Engineering,Vol.38,No.3:299-305,March 2016 D0l:10.13374/j.issn2095-9389.2016.03.001:http://journals.ustb.edu.cn 煤泥选择性絮凝浮选中聚丙烯酰胺的作用机制 邹文杰)四，曹亦俊》，孙春宝”，张志军》 1)北京科技大学土木与环境工程学院，北京1000832)中国矿业大学国家煤加工与洁净化工程技术研究中心，江苏徐州221116 3)中国矿业大学（北京）化学与环境工程学院，北京100083 ☒通信作者，E-mail:zwjcumt(@126.com 摘要测试了阴离子型低相对分子质量聚丙烯酰胺PAMA4O1作用对煤及高岭石絮体表观粒径分布、样品红外光谱以及 表面润湿性的影响，并通过浮选速度实验验证PAMA401的作用效果.研究表明，12 mg'L-PAM A401且循环搅拌11min时， 煤絮体累积粒度分布达到10%、50%和90%时对应的粒径分别是高岭石絮体的6.86、2.22和2.45倍，呈较好的絮凝选择性. 吸附PAMA401后，煤的亲水性官能团特征峰增强，疏水性降低：高岭石的亲、疏水性官能团均有增加，疏水性略高.与常规浮 选相比，选择性絮凝浮选实验的浮选速率较大，捕收剂用量降低30%.浮选3mn时，选择性絮凝浮选实验的可燃体回收率为 81.57%,较常规浮选实验高3.64%，精煤灰分相当.PAMA401虽使煤颗粒的表面润湿性降低，但微细粒煤颗粒表观粒径增 大的效应促进微细粒煤泥的分选. 关键词煤：浮选：絮凝：聚丙烯酰胺：润湿性：粒径 分类号TD923 Mechanism of action of polyacrylamide in selective flocculation flotation of fine coal Z00 Wen-jie》a,CA0Yun2,SUN Chun-bao》,ZHANG Zhi-jun》 1)Civil and Environmental Engineering School,University of Science and Technology Beijing,Beijing 100083,China 2)National Engineering Research Center of Coal Preparation and Purification,China University of Mining and Technology,Xuzhou 221116,China 3)Chemical Engineering and Environmental Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China Corresponding author,E-mail:zwjcumt@126.com ABSTRACT The influences of anionic polyacrylamide with low molecular weight(PAM A401)on coal and kaolinite were investiga- ted by the flocs size distribution,FTIR spectra and wettability.Flotation kinetics tests were carried out to verify the effect of PAM A401.By using 12 mgL PAM A401 and conditioning for 11 min,at the cumulative particle size distributions of 10%,50%and 90%,the particle size of coal is 6.86,2.22 and 2.45 times that of kaolinite flocs,respectively,showing a better flocculation selectiv- ity of coal.After PAM A401 adsorption,the peaks of hydrophilic functional groups of coal are strengthened and the coal particle sur- faces become more hydrophilic.For kaolinite,both the hydrophilic and hydrophobic functional groups increase,and the kaolinite is slightly more hydrophobic.Compared with the conventional flotation,the flotation rate of selective flocculation flotation tests is higher, and 30%of collector is saved.The cumulative combustible recovery of selective flocculation flotation is 81.57%,which is 3.64% higher than the conventional flotation experiment,but the ash content of clean coal is similar.Although PAM A401 reduces the wetta- bility of coal particle surfaces,the enlargement of apparent particle size of fine coal promotes efficient separation of fine coal. KEY WORDS coal:flotation:flocculation:polyacrylamide:wettability:particle size 随着重介质选煤及粗煤泥分选技术的快速发展，重选分选下限不断降低，导致浮选入料粒度趋于减小， 收稿日期：20150401 基金项目：国家重点基础研究发展计划资助项目(2012CB214900):中国博士后科学基金资助项目(2015M570937):中央高校基本科研业务费 资助项目(FRF-TP-15-049A1)工程科学学报，第 38 卷，第 3 期: 299--305，2016 年 3 月 Chinese Journal of Engineering，Vol． 38，No． 3: 299--305，March 2016 DOI: 10． 13374 /j． issn2095--9389． 2016． 03． 001; http: / /journals． ustb． edu． cn 煤泥选择性絮凝浮选中聚丙烯酰胺的作用机制 邹文杰1) ，曹亦俊2) ，孙春宝1) ，张志军3) 1) 北京科技大学土木与环境工程学院，北京 100083 2) 中国矿业大学国家煤加工与洁净化工程技术研究中心，江苏徐州 221116 3) 中国矿业大学( 北京) 化学与环境工程学院，北京 100083  通信作者，E-mail: zwjcumt@ 126． com 摘 要 测试了阴离子型低相对分子质量聚丙烯酰胺 PAM A401 作用对煤及高岭石絮体表观粒径分布、样品红外光谱以及 表面润湿性的影响，并通过浮选速度实验验证 PAM A401 的作用效果． 研究表明，12 mg·L － 1 PAM A401 且循环搅拌 11 min 时， 煤絮体累积粒度分布达到 10% 、50% 和 90% 时对应的粒径分别是高岭石絮体的 6. 86、2. 22 和 2. 45 倍，呈较好的絮凝选择性． 吸附 PAM A401 后，煤的亲水性官能团特征峰增强，疏水性降低; 高岭石的亲、疏水性官能团均有增加，疏水性略高． 与常规浮 选相比，选择性絮凝浮选实验的浮选速率较大，捕收剂用量降低 30% ． 浮选 3 min 时，选择性絮凝浮选实验的可燃体回收率为 81. 57% ，较常规浮选实验高 3. 64% ，精煤灰分相当． PAM A401 虽使煤颗粒的表面润湿性降低，但微细粒煤颗粒表观粒径增 大的效应促进微细粒煤泥的分选． 关键词 煤; 浮选; 絮凝; 聚丙烯酰胺; 润湿性; 粒径 分类号 TD923 Mechanism of action of polyacrylamide in selective flocculation flotation of fine coal ZOU Wen-jie 1)  ，CAO Yi-jun2) ，SUN Chun-bao 1) ，ZHANG Zhi-jun3) 1) Civil and Environmental Engineering School，University of Science and Technology Beijing，Beijing 100083，China 2) National Engineering Ｒesearch Center of Coal Preparation and Purification，China University of Mining and Technology，Xuzhou 221116，China 3) Chemical Engineering and Environmental Engineering，China University of Mining and Technology ( Beijing) ，Beijing 100083，China  Corresponding author，E-mail: zwjcumt@ 126． com ABSTＲACT The influences of anionic polyacrylamide with low molecular weight ( PAM A401) on coal and kaolinite were investiga￾ted by the flocs size distribution，FTIＲ spectra and wettability． Flotation kinetics tests were carried out to verify the effect of PAM A401． By using 12 mg·L － 1 PAM A401 and conditioning for 11 min，at the cumulative particle size distributions of 10% ，50% and 90% ，the particle size of coal is 6. 86，2. 22 and 2. 45 times that of kaolinite flocs，respectively，showing a better flocculation selectiv￾ity of coal． After PAM A401 adsorption，the peaks of hydrophilic functional groups of coal are strengthened and the coal particle sur￾faces become more hydrophilic． For kaolinite，both the hydrophilic and hydrophobic functional groups increase，and the kaolinite is slightly more hydrophobic． Compared with the conventional flotation，the flotation rate of selective flocculation flotation tests is higher， and 30% of collector is saved． The cumulative combustible recovery of selective flocculation flotation is 81. 57% ，which is 3. 64% higher than the conventional flotation experiment，but the ash content of clean coal is similar． Although PAM A401 reduces the wetta￾bility of coal particle surfaces，the enlargement of apparent particle size of fine coal promotes efficient separation of fine coal． KEY WOＲDS coal; flotation; flocculation; polyacrylamide; wettability; particle size 收稿日期: 2015--04--01 基金项目: 国家重点基础研究发展计划资助项目( 2012CB214900) ; 中国博士后科学基金资助项目( 2015M570937) ; 中央高校基本科研业务费 资助项目( FＲF--TP--15--049A1) 随着重介质选煤及粗煤泥分选技术的快速发展， 重选分选下限不断降低，导致浮选入料粒度趋于减小