New insights into the interaction between low-rank coal particles and clay minerals and its role in flotation responses

IF 4.1 2区材料科学 Q2 ENGINEERING, CHEMICAL

Particuology Pub Date : 2024-08-07 DOI:10.1016/j.partic.2024.07.018

Shiwei Wang , Yuheng Wang , Rongjie Kong

引用次数: 0

Abstract

This study investigates the adverse effects of fine clay minerals on low-rank coal (LRC) flotation. Zeta potential analysis, X-ray photoelectron spectroscopy, flotation experiments, and the particle-bubble attachment index (PBAI) were employed to assess these effects. Results indicate that quartz and chlorite particles are more prevalent in the flotation concentrate than kaolinite and montmorillonite, likely due to their preferential adsorption of flotation collectors, which inhibits the hydrophobicity of the LRC surface. Montmorillonite, however, exhibits greater adhesion to LRC surfaces due to its positive charge. Extended DLVO theoretical analysis reveals that polar surface interaction energy is a primary driving force in coal-mineral interactions and is crucial in overcoming the energy barrier posed by electrostatic double-layer forces. The impact of clay minerals on LRC flotation is highly dependent on clay type.

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低级煤颗粒与粘土矿物之间的相互作用及其在浮选反应中的作用的新见解

本研究探讨了细粘土矿物对低阶煤（LRC）浮选的不利影响。为评估这些影响，采用了 Zeta 电位分析、X 射线光电子能谱、浮选实验和颗粒-气泡附着指数（PBAI）。结果表明，与高岭石和蒙脱石相比，石英和绿泥石颗粒在浮选精矿中更为普遍，这可能是由于它们优先吸附浮选捕收剂，从而抑制了 LRC 表面的疏水性。而蒙脱石由于带正电荷，对 LRC 表面的附着力更大。扩展的 DLVO 理论分析表明，极性表面相互作用能是煤与矿物相互作用的主要驱动力，对于克服静电双层力造成的能量障碍至关重要。粘土矿物对 LRC 浮选的影响在很大程度上取决于粘土类型。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Particuology 工程技术-材料科学：综合

CiteScore

6.70

自引率

2.90%

发文量

1730

审稿时长

32 days

期刊介绍： The word ‘particuology’ was coined to parallel the discipline for the science and technology of particles. Particuology is an interdisciplinary journal that publishes frontier research articles and critical reviews on the discovery, formulation and engineering of particulate materials, processes and systems. It especially welcomes contributions utilising advanced theoretical, modelling and measurement methods to enable the discovery and creation of new particulate materials, and the manufacturing of functional particulate-based products, such as sensors. Papers are handled by Thematic Editors who oversee contributions from specific subject fields. These fields are classified into: Particle Synthesis and Modification; Particle Characterization and Measurement; Granular Systems and Bulk Solids Technology; Fluidization and Particle-Fluid Systems; Aerosols; and Applications of Particle Technology. Key topics concerning the creation and processing of particulates include: -Modelling and simulation of particle formation, collective behaviour of particles and systems for particle production over a broad spectrum of length scales -Mining of experimental data for particle synthesis and surface properties to facilitate the creation of new materials and processes -Particle design and preparation including controlled response and sensing functionalities in formation, delivery systems and biological systems, etc. -Experimental and computational methods for visualization and analysis of particulate system. These topics are broadly relevant to the production of materials, pharmaceuticals and food, and to the conversion of energy resources to fuels and protection of the environment.