浮选中酸性表面预处理对微细钛铁矿和钛铁矿疏水团聚的影响

IF 4.9 2区工程技术 Q1 ENGINEERING, CHEMICAL

Minerals Engineering Pub Date : 2024-10-15 DOI:10.1016/j.mineng.2024.109050

Yusheng Du , Qingyou Meng , Zhitao Yuan , Chong Han , Lixia Li , Jiwei Lu , Ting Liu

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引用次数: 0

摘要

采用酸性表面预处理实现了微细钛铁矿在浮选中的选择性疏水团聚。微浮选和人工混矿实验表明，酸性表面预处理后，微细钛铁矿的回收率随NaOL浓度的增加而提高，微细钛铁矿与钛铁矿的可浮性差异显著增大。Zeta 电位和接触角分析表明，酸性表面预处理增强了 NaOL 在钛铁矿表面的吸附，同时降低了 NaOL 在钛铁矿表面的吸附。浊度、光学显微镜和 EDLVO 理论分析表明，在 NaOL 溶液中，疏水吸引力在短颗粒间距中占主导地位。经过酸性表面预处理后，由于疏水吸引力增强，在 NaOL 溶液中，微细钛铁矿颗粒之间的疏水聚结增强。相比之下，微细钛白粉颗粒之间以及微细钛铁矿和钛白粉颗粒之间的疏水吸引力和团聚作用减弱。总之，酸性表面预处理改善了 NaOL 的选择性吸附和微细钛铁矿的选择性疏水团聚，从而提高了微细钛铁矿的分离效率和回收率。

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Impact of acid surface pretreatment on the hydrophobic agglomeration of micro-fine ilmenite and titanaugite in flotation

Acid surface pretreatment was employed to realize the selective hydrophobic agglomeration of micro-fine ilmenite in flotation. Microflotation and artificially mixed mineral experiments manifested that after acid surface pretreatment, the recovery of micro-fine ilmenite with the increase of NaOL concentration and the floatability difference of micro-fine ilmenite and titanaugite increased significantly. Zeta potential and contact angle analyses suggested that acid surface pretreatment intensified the adsorption of NaOL on ilmenite surfaces while reducing it on titanaugite surfaces. Turbidity, optical microscope, and EDLVO theory analyses attested that the hydrophobic attraction dominated in a short particle spacing in NaOL solution. Following acid surface pretreatment, the hydrophobic agglomeration between micro-fine ilmenite particles enhanced in NaOL solution due to increased hydrophobic attraction. In contrast, the hydrophobic attraction and agglomeration between micro-fine titanaugite particles as well as between micro-fine ilmenite and titanaugite particles weakened. Overall, acid surface pretreatment improved the selective adsorption of NaOL and the selective hydrophobic agglomeration of micro-fine ilmenite, resulting in enhanced separation efficiency and recovery of micro-fine ilmenite.

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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.