The impact of metal ions on flotation of coal gasification fine slag: an experimental study

This study investigates the flotation performance of coal gasification fine slag in the presence of metal ions with different valences. The impact of metal ions on the surface topography, wettability, zeta potential, functional group, and particle size distribution of coal gasification fine slag wer...

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Published in:International journal of coal preparation and utilization 2025-01, Vol.45 (1), p.213-230
Main Authors: Sun, Xiangyun, Lu, Qifa, Tan, Jiakun, Liang, Long, Gao, Haiyang, Xie, Guangyuan, Peng, Yaoli
Format: Article
Language:English
Subjects:
Aluminum
Calcium ions
Coal
Coal gasification
coal gasification fine slag
Deionization
Flotation
Functional groups
Hydrophobicity
Ion concentration
Magnesium
Metal ions
Particle size distribution
single bubble loading
Size distribution
Slag
Wettability
Zeta potential
ζ potential
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container_title International journal of coal preparation and utilization
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creator Sun, Xiangyun
Lu, Qifa
Tan, Jiakun
Liang, Long
Gao, Haiyang
Xie, Guangyuan
Peng, Yaoli
description This study investigates the flotation performance of coal gasification fine slag in the presence of metal ions with different valences. The impact of metal ions on the surface topography, wettability, zeta potential, functional group, and particle size distribution of coal gasification fine slag were analyzed. The results demonstrated that K + , Ca 2+ , Mg 2+ , and Al 3+ all have a positive effect on flotation, with Al 3+ being particularly effective. At a concentration of 0.2 mol/L, Al 3+ increased the recovery of combustible matter in coal gasification fine slag from 66.70% to 91.05% compared to deionized water. Metal ions reduce the absolute value of the gasification fine slag potential, compress its double layer while increasing its surface hydrophobicity. Higher ion concentration leads to a closer-to-zero potential and increased hydrophobicity. Additionally, Al 3+ promote diesel adsorption onto coal gasification fine slag. This work explains the effects of metal ions on coal gasification fine slag flotation.
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subjects Aluminum
Calcium ions
Coal
Coal gasification
coal gasification fine slag
Deionization
Flotation
Functional groups
Hydrophobicity
Ion concentration
Magnesium
Metal ions
Particle size distribution
single bubble loading
Size distribution
Slag
Wettability
Zeta potential
ζ potential
title The impact of metal ions on flotation of coal gasification fine slag: an experimental study
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