矿物分选中低阶多孔煤的药剂吸附及表征实验设计  

Experimental design of reagent adsorption and characterization of low-rank porous coal in mineral separation

作　　者：解维伟[1] 周玲妹[1] 卓启明 孙美洁 XIE Weiwei;ZHOU Lingmei;ZHUO Qiming;SUN Meijie(School of Chemical and Environment Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China)

机构地区：[1]中国矿业大学(北京)化学与环境工程学院,北京100083

出　　处：《实验技术与管理》2024年第8期96-103,共8页Experimental Technology and Management

摘　　要：该实验以低阶多孔煤为实验材料,首先采用工业和元素分析、扫描电镜和孔隙测试等方法分析煤样基础性质,然后使用复配药剂W-1对其进行吸附改性,再通过红外光谱、X-射线光电子能谱和接触角对改性机理进行表征,并借助等离子体发射光谱测试方法计算药剂在煤样表面的吸附量。实验结果表明,实验煤样表面极性基团丰富、孔隙结构发达、亲水性强、不易分选;药剂吸附改性后的煤样疏水性得到大幅优化。该实验设计遵循逐步深化原则,帮助学生强化思维训练,提升基础理论知识掌握和实践操作能力。[Objective]Low-rank coal constitutes a significant portion of China's energy resource derived from coal.The most prevalent and efficient method for processing fine-grained,low-rank coal slime is interface sorting technology.However,the inherent characteristics of low-rank coal,which include a high surface content of polar functional groups,abundant pores and fissures,and the presence of various embedded gangue minerals,render this type of coal highly hydrophilic,thereby complicating the sorting process.The identification and application of a novel compound reagent for adsorption and modification purposes may not only facilitate efficient sorting but also hold profound implications for the comprehensive utilization of currently available low-rank coal resources.[Methods]This paper initially performs proximate and ultimate analyses on coal samples to understand their fundamental properties,followed by scanning electron microscopy to examine the surface morphology and elemental atomic content of the samples.Subsequently,a pore structure test,Brunauer-Emmett-Teller,is conducted to gain insights into the specific surface area and pore structure of the coal samples.In the subsequent phase,adsorption tests were conducted on the coal samples using 0#diesel and W-1 compound reagents as collectors to compare the effects of adsorption modification induced by these reagents.Fourier transform infrared spectroscopy tests were then performed on the samples pre-and post-W-1 adsorption to qualitatively analyze the types of functional groups present on the coal surface and to comprehend the shifts in the proportions of hydrophilic and hydrophobic functional groups.Simultaneously,inductively coupled plasma testing was utilized to characterize the amount of W-1 adsorbed on the coal surface.The elemental contents of sodium and phosphorus in the solution before and after adsorption were measured to calculate the content of the surfactants sodium petroleum sulfonate and trioctyl phosphate in the solution.The concentration method was ul

关 键 词：低阶煤 多孔材料 分选 吸附 表面改性 

分 类 号：TD94[矿业工程—选矿] G642.423[文化科学—高等教育学]