摘要
为了探究捕收剂与低阶煤泥表面相互作用机理,利用工业分析、X射线衍射(XRD)、扫描电镜-能谱(SEM-EDS)、表面张力仪、傅里叶红外光谱(FTIR)等手段探明低阶煤及捕收剂性质,采用动态接触角、X射线光电子能谱(XPS)测试分析等手段表征低阶煤与捕收剂作用机理,并通过煤泥浮选试验比较了柴油、地沟油、花生油、复配药剂DH32等对低阶煤的浮选效果。结果表明,在同等药剂用量下,地沟油与花生油的浮选效果明显优于传统烃类油捕收剂柴油,研究发现,复配药剂DH32可以进一步提高精煤可燃体回收率,由于相较柴油DH32含有大量含氧官能团,易与低阶煤分子表面的极性位点产生静电和氢键键合作用,使煤样表面附着大量疏水基团(C—C/C—H),大幅增强煤样疏水性,从而达到更好的浮选效果。
In order to explore the interaction mechanism between collector and the surface of low rank coal slime,industrial analysis,X-ray diffraction(XRD),scanning electron microscopy(SEM-EDS),surface tensiometer,Fourier transform infrared spectroscopy(FTIR)and other means were used to explore the properties of low rank coal slime and collector.Dynamic contact angle and X-ray photoelectron spectroscopy(XPS)were used to characterize the action mechanism of low rank coal and collector,and the flotation effects of diesel oil,gutter oil,peanut oil and compound reagent DH32 on low rank coal were compared through slime flotation tests.The results show that under the same dosage of reagents,the flotation effects of gutter oil and peanut oil are obviously better than that of the traditional hydrocarbon oil collector diesel.It is found that the compound reagent DH32 can further improve recovery of refined coal combustible.It is because that DH32 contains a large amount of oxygen containing functional groups compared with diesel,which are easy to produce electrostatic and hydrogen bonding with the polar sites on the surface of low rank coal molecules,so a large number of hydrophobic groups(C-C/C-H)are attached to the surface of coal samples,greatly enhancing the hydrophobicity of coal samples,so as to achieve a better flotation effect.
作者
赵俊吉
王钰赛
刘晓康
何琦
李永改
邢耀文
桂夏辉
ZHAO Junji;WANG Yusai;LIU Xiaokang;HE Qi;LI Yonggai;XING Yaowen;GUI Xiahui(National Engineering Research Center of Coal Preparation and Purification,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China;School of Chemical Engineering and Technology,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China)
出处
《矿业研究与开发》
CAS
北大核心
2022年第5期33-39,共7页
Mining Research and Development
基金
国家自然科学基金青年基金资助项目(51804305)
江苏省自然科学基金青年基金资助项目(BK20180656)。
关键词
低阶煤
复配捕收剂
官能团
可浮性
浮选强化
Low rank coal
Compound collector
Functional groups
Floatability
Enhanced flotation
