Flotation of coal in the presence of quartz and clay minerals

被引：16
|
作者：
Wang, Hainan [1 ]
Zhu, Hongzheng [1 ,2 ]
Zhu, Jinbo [1 ]
Xu, Wenyu [1 ]
Li, Mengshan [1 ]
Fei, Zhikui [1 ]
机构：
[1] Anhui Univ Sci & Technol, Sch Mat Sci & Engn, Huainan, Peoples R China
[2] Univ Autonoma San Luis Potosi, Inst Met, Surface Chem Lab, San Luis Potosi, San Luis Potosi, Mexico
来源：
INTERNATIONAL JOURNAL OF COAL PREPARATION AND UTILIZATION | 2021年 / 41卷 / 06期
基金：
中国国家自然科学基金;
关键词：
Flotation; quartz; clay mineral; coal; extended DLVO theory; KAOLINITE; SIZE; SEPARATION;
D O I：
10.1080/19392699.2018.1487408
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
A flotation study was conducted to evaluate the separation of coal in the presence of quartz and clay minerals. The interaction energies between coal and quartz, kaolinite, and montmorillonite were analyzed via the Extended Derjaguin-Landau-Verwey-Overbeek (EDLVO) theory. Also, the quartz, kaolinite and montmorillonite coatings were explored using SEM technique. Energy barriers were calculated to exist between coal and quartz, kaolinite, and montmorillonite preventing the change in interaction energy and followed the order: coal-quartz#coal-kaolinite#coal-montmorillonite. Using an SEM technique on the surface topography of coal, it was shown that the energy barrier between coal and montmorillonite rather than quartz and kaolinite was broken by the impeller rotation of 1800 r/min resulting in montmorillonite coating on the coarse coal surface. The coal cumulative yield for a flotation time 5 min was found to decline 2.94%, 5.74% and 47.99% in the presence of quartz, kaolinite, and montmorillonite, respectively, compared to that of only coal.
引用
收藏
页码：407 / 417
页数：11
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