Efficient separation of mica from feldspar and quartz using flotation in quaternary ammonium salt system

IF 5 2区工程技术 Q1 ENGINEERING, CHEMICAL

Minerals Engineering Pub Date : 2025-08-14 DOI:10.1016/j.mineng.2025.109683

Mengyao Qi , Hanxiao Zhang , Zhantao Hu , Weizhe Luo , Bowen Yu , Weijun Peng , Yehao Huang , Jianping Wang , Wei Wang , Yanfang Huang

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引用次数: 0

Abstract

Octadearyl dimethyl ammonium chloride (STAC) and sodium oleate (NaOL) were employed as a combined cationic-anion collector to selective separation of mica from feldspar and quartz through flotation. The superior separation effect was obtained at the pH of 12 when using a 120 mg/L of the collector concentration with the STAC and NaOL molar ratio of 1:4. Both the grade and recovery of mica exceeding 60 % in concentrate, while feldspar and quartz were effectively depressed to approximately 10 %. The selective flotation separation of mica from feldspar and quartz was achieved. The mica surface displayed multilayer reagent adsorption with synergistic interaction of the collectors STAC and NaOL. The cooperative adsorption phenomenon was conspicuously absent on feldspar and quartz surfaces. The study establishes a novel alkaline flotation strategy (pH of 12) for mica separation, circumventing traditional acidic conditions while maintaining high selectivity.

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季铵盐浮选系统中云母与长石、石英的高效分离

采用八烷基二甲基氯化铵（STAC）和油酸钠（NaOL）作为阳离子-阴离子组合捕收剂，对云母、长石和石英进行浮选选择性分离。当捕收剂浓度为120 mg/L， STAC与NaOL的摩尔比为1:4，pH = 12时，分离效果较好。精矿中云母的品位和回收率均超过60%，而长石和石英则有效地抑制在10%左右。实现了云母与长石、石英的选择性浮选分离。在捕收剂STAC和NaOL的协同作用下，云母表面呈现多层试剂吸附。长石和石英表面均不存在协同吸附现象。该研究建立了一种新的碱性浮选策略（pH为12）用于云母分离，绕过了传统的酸性条件，同时保持了高选择性。

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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.