低阶煤表面含氧官能团对煤泥浮选的影响  

Effect of Surface Oxygen-containing Functional Groups of Low Rank Coal on Slime Flotation

作　　者：刘晓康 黄海珊 王钰赛 刘敏[1,2] 赵俊吉[1,2] 车涛 孟凡彩[3] 邢耀文[1] 桂夏辉[1] 曹亦俊[1] LIU Xiaokang;HUANG Haishan;WANG Yusai;LIU Min;ZHAO Junji;CHE Tao;MENG Fancai;XING Yaowen;GUI Xiahui;CAO Yijun(National Engineering Research Center of Coal Preparation and Purification,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China;School of Chemical Engineering and Teechnology,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China;Coal Preparation Management Center,Yanzhou Coal Preparation Company Limited,Zoucheng,Shandong 273500,China)

机构地区：[1]中国矿业大学国家煤加工与洁净化工程技术研究中心,江苏徐州市221116 [2]中国矿业大学化工学院,江苏徐州市221116 [3]兖州煤业股份有限公司选煤管理中心,山东邹城市273500

出　　处：《矿业研究与开发》2022年第7期61-65,共5页Mining Research and Development

基　　金：国家重点研发计划项目(2018YFC0604702);国家自然科学基金青年基金项目(51904300);国家自然科学基金项目(51774286,51574236)。

摘　　要：低阶煤浮选效果差是亟需解决的难题。为了推动低阶煤高效利用,以两种低阶煤和两类捕收剂为研究对象,借助SEM-EDS、FTIR、XPS等测试,分析低阶煤表面的特性,研究不同捕收剂的性质及其与低阶煤表面的作用,通过煤泥浮选试验进行验证。结果表明,低阶煤表面粗糙,裂隙发达,含有丰富的氧元素,并且氧元素主要以官能团的形式赋存在低阶煤表面。此外,粗糙度越高,含氧官能团越多,越不利于浮选。捕收剂自身的分子结构和化学组成很大程度上决定了煤泥浮选效果,不饱和脂肪酸含量丰富的捕收剂更容易与低阶煤表面的含氧官能团形成弱氢键作用,从而改善低阶煤表面的疏水性,浮选效果更好。为提高低阶煤泥的浮选效果,应该针对性地开发与煤泥表面性质相适配的浮选药剂。The poor flotation effect of low rank coal is an urgent problem to be solved.In order to promote the efficient utilization of low rank coal,two kinds of low rank coal and two kinds of collectors were taken as the research objects.And the characteristics of low rank coal surface were analyzed by means of SEM-EDS,FTIR and XPS tests,and the properties of different collectors and their effects on the surface of low rank coal were studied.Then,slime flotation test was conducted to verify.The results show that the surface of low rank coal is rough,the cracks are developed,and oxygen elements are rich.The oxygen elements are mainly stored on the surface of low rank coal in the form of functional groups.In addition,the higher the roughness is,the more oxygen-containing functional groups are,and the more unfavorable it is for flotation.The molecular structure and chemical composition of the collector largely determine the flotation effect of slime.The collector with rich unsaturated fatty acids is more likely to form a weak hydrogen bond with the oxygen-containing functional groups on the surface of low rank coal,so as to improve the hydrophobicity of the surface of low rank coal,and the flotation effect is better.In order to improve the flotation effect of low rank slime,flotation reagents suitable for the surface properties of slime should be developed.

关 键 词：低阶煤 浮选 表面官能团 表面性质 基元适配 

分 类 号：TD923[矿业工程—选矿]