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Mechanism of action of the novel reagent dodecyl trimethyl ammonium chloride on magnesite and quartz surfaces.

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Title: Mechanism of action of the novel reagent dodecyl trimethyl ammonium chloride on magnesite and quartz surfaces.
Authors: Sun, Hao-ran1 (AUTHOR), Gao, Gui1 (AUTHOR) gao09102023@163.com, Wang, Yu-lian1 (AUTHOR) ylwang0908@163.com
Source: Journal of Molecular Liquids. Nov2024:Part B, Vol. 414, pN.PAG-N.PAG. 1p.
Subjects: Field emission electron microscopy, X-ray photoelectron spectroscopy, Atomic force microscopy, Magnesite, Hydrogen bonding interactions, Quartz
Abstract: • Magnesium ore desiliconization rate reaches 91.82 % with 20 mg/L KDMP treatment. • KDMP can selectively transform quartz surface characteristics. • Electrostatic interactions and hydrogen bonding made KDMP adsorption onto the quartz surface. Silica impurities are one of the key factors that reduce the quality of magnesite. In this experiment, dodecyl trimethylammonium chloride (KDMP) was used as a quartz collector for silica-magnesium separation, and mineral flotation tests demonstrated that KDMP can effectively desiliconize and purify magnesite under the conditions of 20 mg/L and pH 5.0. Contact angle and Zeta potential measurements show that KDMP alters quartz's characteristics more than magnesite. X-ray photoelectron spectroscopy (XPS) and infrared spectroscopy (FTIR) tests show that KDMP works on quartz and adsorbs solely on its surface, not on magnesite. Field Emission Scanning Electron Microscopy (FESEM) and Atomic Force Microscopy (AFM) images revealed that the KDMP collector adsorbed exclusively on the quartz surface, forming a layer of adsorption structure, but was weak on the magnesite surface. As a result, the KDMP collector is a highly intriguing flotation collector that can efficiently separate magnesite from quartz while also introducing a new form of collector for the separation and purification of low-grade magnesite. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:• Magnesium ore desiliconization rate reaches 91.82 % with 20 mg/L KDMP treatment. • KDMP can selectively transform quartz surface characteristics. • Electrostatic interactions and hydrogen bonding made KDMP adsorption onto the quartz surface. Silica impurities are one of the key factors that reduce the quality of magnesite. In this experiment, dodecyl trimethylammonium chloride (KDMP) was used as a quartz collector for silica-magnesium separation, and mineral flotation tests demonstrated that KDMP can effectively desiliconize and purify magnesite under the conditions of 20 mg/L and pH 5.0. Contact angle and Zeta potential measurements show that KDMP alters quartz's characteristics more than magnesite. X-ray photoelectron spectroscopy (XPS) and infrared spectroscopy (FTIR) tests show that KDMP works on quartz and adsorbs solely on its surface, not on magnesite. Field Emission Scanning Electron Microscopy (FESEM) and Atomic Force Microscopy (AFM) images revealed that the KDMP collector adsorbed exclusively on the quartz surface, forming a layer of adsorption structure, but was weak on the magnesite surface. As a result, the KDMP collector is a highly intriguing flotation collector that can efficiently separate magnesite from quartz while also introducing a new form of collector for the separation and purification of low-grade magnesite. [ABSTRACT FROM AUTHOR]
ISSN:01677322
DOI:10.1016/j.molliq.2024.126184