Application of dodecylbenzenesulfonate isopropanolamine as an environmentally friendly collector in direct flotation separation of magnesite from quartz

IF 4.9 2区工程技术 Q1 ENGINEERING, CHEMICAL

Minerals Engineering Pub Date : 2025-05-11 DOI:10.1016/j.mineng.2025.109408

Xiaoqi Ban , Jin Yao , Wanzhong Yin , Chao Yin , Wenju Sun , Weifan Du , Taozhong Zhang , Yulian Wang

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Abstract

This study introduces a novel, environmentally friendly direct flotation process designed to efficiently purify magnesite from high-silica, low-grade ores, where quartz impurities hinder conventional flotation. By using dodecylbenzenesulfonate isopropanolamine (DBIA) as a collector, successful flotation separation of magnesite from quartz was achieved. Under optimal conditions (pH 11.0, DBIA dosage of 100 mg/L), flotation experiments on artificially mixed minerals consistently achieved magnesite recovery exceeding 97 %, while quartz recovery remained below 12 %. These results demonstrate DBIA’s excellent selective collecting performance. The mechanism of DBIA’s selective adsorption was investigated using advanced characterization techniques, including zeta potential, contact angle, FTIR, XPS, and AFM. The findings reveal that DBIA’s sulfonate group (−SO₃⁻) selectively adsorbs onto magnesite, enhancing its hydrophobicity, while showing minimal adsorption on quartz, leading to efficient flotation separation. Beyond introducing a promising reagent system, this work contributes mechanistic understanding and practical guidance for developing green flotation reagents aimed at sustainable utilization of magnesium-bearing resources.

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十二烷基苯磺酸异丙醇胺作为环保捕收剂在菱镁矿与石英正浮选分离中的应用

本研究介绍了一种新型的、环保的直接浮选工艺，旨在从石英杂质阻碍常规浮选的高硅、低品位矿石中高效地提纯菱镁矿。以十二烷基苯磺酸异丙醇胺（DBIA）为捕收剂，成功地实现了菱镁矿与石英的浮选分离。在最佳条件下（pH 11.0， DBIA投加量100 mg/L），人工混合矿物浮选试验菱镁矿的回收率均超过97%，石英的回收率均在12%以下。这些结果表明DBIA具有良好的选择性收集性能。采用zeta电位、接触角、FTIR、XPS和AFM等先进表征技术研究了DBIA的选择性吸附机理。结果表明，DBIA的磺酸基（−SO3−）选择性吸附在菱镁矿上，增强了其疏水性，而对石英的吸附最小，从而实现了高效的浮选分离。本研究不仅介绍了一种有前景的药剂体系，还为开发绿色浮选药剂以实现含镁资源的可持续利用提供了机理认识和实践指导。

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来源期刊

Minerals Engineering 工程技术-工程：化工

CiteScore

8.70

自引率

18.80%

发文量

519

审稿时长

81 days

期刊介绍： The purpose of the journal is to provide for the rapid publication of topical papers featuring the latest developments in the allied fields of mineral processing and extractive metallurgy. Its wide ranging coverage of research and practical (operating) topics includes physical separation methods, such as comminution, flotation concentration and dewatering, chemical methods such as bio-, hydro-, and electro-metallurgy, analytical techniques, process control, simulation and instrumentation, and mineralogical aspects of processing. Environmental issues, particularly those pertaining to sustainable development, will also be strongly covered.