摘要
通过对中高阶煤与天然焦表面电性的研究,可为揭示煤与天然焦电磁辐射机理,判断矿物可浮性和实现不同矿物分离提供基础。为深入了解中高阶煤与天然焦表面电性的差异,分析煤与天然焦表面官能团组成的差异,采用Zeta电位与FTIR分析方法对样品的表面特性进行综合分析,研究其表面电性与主要官能团的耦合关系。结果表明:①煤样的Zeta电位总体为负,天然焦样品的Zeta电位为正,同时随着变质程度的升高,样品表面负电官能团减少,Zeta电位增大;②脱灰后,样品表面负电官能团被破坏,煤与天然焦的Zeta电位均为正,且随着煤变质程度的增加,Zeta电位值减小;③羟基、COOH、C=O是影响Zeta电位的主要官能团,其中,C=O对Zeta电位的影响大于COOH;羟基-π是羟基结构中影响Zeta电位的主要官能团。研究成果为进一步探究煤与天然焦电磁辐射机理与浮选性提供基础。
Through the study of the surface electrical properties of coal and natural coke,it can provide a basis for revealing the electromagnetic radiation mechanism of coal and natural coke,judging the floatability of minerals and realizing the separation of different minerals.In order to deeply understand the difference of surface electrical properties between medium and high rank coal and natural coke,and analyze the difference of surface functional group composition between coal and natural coke,Zeta potential and FTIR analysis methods were used to comprehensively analyze the surface characteristics of the samples,and the coupling relationship between surface electrical properties and main functional groups was studied.The results show that:①the Zeta potential of coal samples is generally negative,and the Zeta potential of natural coke samples is positive.At the same time,with the increase of metamorphic degree,the negative functional groups on the surface of the samples decrease and the Zeta potential increases.②After deashing,the negative functional groups on the surface of the sample were destroyed,and the Zeta potential of coal and natural coke was positive,and the Zeta potential value decreased with the increase of coal metamorphism.③Hydroxyl,COOH and C=O are the main functional groups that affect the Zeta potential.Among them,the effect of C=O on the Zeta potential is greater than that of COOH;hydroxyl-πis the main functional group affecting Zeta potential in hydroxyl structure.The research results provide a basis for further exploring the electromagnetic radiation mechanism and flotation performance of coal and natural coke.
作者
耿恒毅
翟晓荣
胡广青
刘伟
罗卉卉
徐瑞瑞
GENG Hengyi;ZHAI Xiaorong;HU Guangqing;LIU Wei;LUO Huihui;XU Ruirui(School of Earth and Environment,Anhui University of Science and Technology,Huainan,Anhui 232001;Exploration Research Institute,Anhui Provincial Bureau of Coal Geology Hefei Anhui 230088;Green Mining Engineering Technology Research Center of Anhui Province,Hefei,Anhui 230088)
出处
《中国煤炭地质》
2024年第8期1-8,25,共9页
Coal Geology of China
基金
安徽省重点研究和开发计划项目(2022n07020005)。
关键词
中高阶煤
天然焦
ZETA电位
FTIR
官能团
middle-high rank coal
natural coke
Zeta potential
FTIR
functional groups
