Characterisation of frother properties in coal preparation process water

Bournival, Ghislain; Muin, Syeda Rubaiya; Lambert, Noel; Ata, Seher

doi:10.1016/j.mineng.2017.04.006

Cited by 16 publications

(2 citation statements)

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“…Electrolytes have an important effect on the interactions between fine mineral particles in solution systems. Firstly, electrolyte ions can interact with ions already present in the bilayer structure of mineral particles, compressing the bilayer on the surface of mineral particles, causing changes in the Zeta potential of the particle surface, and thus altering the electrostatic force between particles (Harvey et al, 2002;Bournival et al, 2017;Bournival and Ata,2021). Liu Jiongtian's team (Zhang et al, 2004;Zhang et al, 2005;Feng et al, 2010) found that Ca 2+ is mainly adsorbed on the surface of clay minerals through electrostatic interactions, which affects the floatability of minerals.…”

Section: Electrolytementioning

confidence: 99%

Progress of microscopic interaction between fine particles in coal slurry water

Shang,

Chen,

Ling

et al. 2024

Physicochem. Probl. Miner. Process.

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The interaction between fine particles is widespread in nature and plays a crucial role in regulating various interfaces for minerals. In coal preparation wastewater treatment, the intricate mechanism of interaction between multi-component fine particles in coal slurry water (denoted as CSW) is a fundamental aspect in addressing the challenges of coal slurry water agglomeration, selective separation, and difficult dewatering. This paper presents a summary of the necessity, current research status, and progress in studying the microscopic interaction between mineral particles in CSW systems. It overviews theoretical calculation formulas for particle-particle interaction, factors that influence such interaction, and modern analysis techniques for studying microscopic particle interaction. These findings enhance and refine relevant theories, establish a theoretical foundation, and offer technical support for stabilizing and optimizing the performance of CSW systems. Additionally, it elucidates the mechanism of particle-particle interaction in CSW, which is of significant importance in achieving efficient separation of CSW.

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Section: Electrolytementioning

confidence: 99%

Progress of microscopic interaction between fine particles in coal slurry water

Shang,

Chen,

Ling

et al. 2024

Physicochem. Probl. Miner. Process.

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“…The daily operation of a coal preparation plant highly relies on the use of a large amount of water, which is a non-renewable nature resource (Gupta et al, 2012). As such, coal preparation plants are required to realize a closed cycle of washing water that can not only reduce sewage discharge but also relieve pressure on the usage of fresh water (Bournival et al, 2017). However, the implementation of closed water circuits has caused the processing water to be gradually enriched of various inorganic ions that come from different sources, including the chemical additives, the groundwater, or sea water with high salinity .…”

Section: Introductionmentioning

confidence: 99%

Effects of monovalent and divalent ions in coal gasification brine on the froth entrainment and flotation kinetics of anthracite coal

Zheng¹,

Bu²,

Zhou³

et al. 2020

Physicochem. Probl. Miner. Process.

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Water plays a critical role in various stages of flotation, which brings a lot of pressure to the flotation processing plants resided in dry areas. In this regard, it will be of significance to explore the feasibility of using wastewater resources in mineral flotation. Coal gasification brine (CGB) that contains a high concentration of salts becomes the subject of interest of this study. In this study, a synthetic CGB solution, which was prepared by adding NaCl, MgCl2, and CaCl2 to ultrapure water based on the composition of salts in a real CGB, was used in the flotation of anthracite coal. The comparison results based on the first-order model showed that flotation in the presence of the synthetic CGB solution gave a higher flotation selectivity (SI =7.086) than that of flotation in ultrapure water (SI=3.545). Water recoveries and average bubble sizes in the froth showed that the addition of the three salt ions (Na + , Mg 2+ , and Ca2 +) was conducive to diminishing the entrainment of gangue materials as a result of the reduction of water reporting to the froth. Additionally, the zeta potentials and induction time measurements indicated that only divalent ions of Ca 2+ and Mg 2+ significantly compressed the double electrical layer and enhanced the attachment between bubbles and coal particles according to DLVO theory, which was further confirmed by the calculation of interaction energy between coal and bubbles. The findings of the present work may promote the use of CGB as a potential water resource in coal flotation.

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