Optimization of collector and its action mechanism in lignite flotation

被引:65
作者
Cheng, Gan [1 ,2 ,3 ]
Li, Ziyou [4 ]
Ma, Zilong [5 ]
Cao, Yijun [5 ]
Sun, Lijuan [4 ]
Jiang, Zhendong [1 ]
机构
[1] Henan Polytech Univ, Coll Chem & Chem Engn, Jiaozuo 454000, Peoples R China
[2] Henan Polytech Univ, Synerigism Innovat Ctr Coal Safety Prod Henan Pro, Jiaozuo 454000, Peoples R China
[3] Henan Polytech Univ, Henan Key Lab Coal Green Transformat, Jiaozuo 454000, Peoples R China
[4] China Univ Min & Technol, Sch Chem Engn & Technol, Xuzhou 221116, Jiangsu, Peoples R China
[5] China Univ Min & Technol, Natl Engn Reseatch Ctr Coal Preparat & Purificat, Xuzhou 221116, Jiangsu, Peoples R China
基金
中国国家自然科学基金;
关键词
Lignite; Flotation; Collector; Induction time; LOW-RANK-COAL; CHEMICAL-PROPERTIES; PERFORMANCE; CHINESE; SURFACE; BUBBLE; OIL; AIR;
D O I
10.1016/j.powtec.2019.01.011
中图分类号
TQ [化学工业];
学科分类号
081705 [工业催化];
摘要
The flotation performance of lignite is poor even if a high dosage of the collector is used. In this work, the lignite in the Huolinhe Coalfield of Inner Mongolia was used, and its physicochemical properties were determined by proximate analysis, particle size analysis and Fourier transform infrared spectroscopy. The flotation performances of lignite using six collectors were investigated. Moreover, the flotation responses of lignite with combined collector and two emulsified collectors were compared. It was found that the polar groups in the collector structure were helpful to improve the flotation of lignite through reducing the induction time to 15 ms, only 1/12 of that of the traditional collector (190 ms for diesel). The induction time was in the order of diesel> kerosene> emulsified kerosene> emulsified diesel> C1 (one of the nameless collectors), consistent with the flotation performance. C1 and emulsified collectors significantly improved the flotation performance of lignite by promoting the floating of coarse coal (-500 + 250 mu m). (C) 2019 Elsevier B.V. All rights reserved.
引用
收藏
页码:182 / 189
页数:8
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