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| 1 | Effect of roughness on wettability and floatability:Based on wetting film drainage between bubbles and solid surfaces显示文摘Wetting film thinning measurement was introduced to clarify the wettability and floatability of solid surfaces with varying roughness. The wettability was quantified using the contact angle measurement combined with the dynamic force microbalance test between solid surfaces and water droplets, while the floatability was investigated by the bubble-solid surface dynamic attachment observation and the induction time measurement. The results show that the water contact angles reduce(14.53°, 12.74°, and 6.71°)with the increase of glass surface roughness, while the water droplet-glass adhesion forces intensify(11.1, 19.1 and 19.2 μN) owing to the stable wetting film. The distortion of the contact surface and the Wenzel state are the causes. In contrast, the hydrophobized surfaces have the growing apparent contact angles(38.08°, 69.81°, and 81.01°), declining adhesion strength and shortening induction time(863, 352and 12 ms) along with the increasing surface roughness. The weak wettability and fine floatability on the rough hydrophobized surface is reflected in the fast wetting film drainage dynamics and three-phase contact formation, which may be attributed to the wetting film with short diameter on tiny rough nubs and the entrapped air in the grooves as a bridge between the bulk bubble and the solid surface. | Ming Li Yaowen Xing Chunyun Zhu Qinshan Liu Zili Yang Rui Zhang Youfei Zhang Yangchao Xia Xiahui Gui | 2022 | International Journal of Mining Science and Technology2022，32，6： | 1 |
| 2 | 微细粒高岭土对黄铁矿海水浮选的影响机理显示文摘为探究海水浮选体系中黏土矿对黄铁矿的影响,进行了不同高岭土含量条件下黄铁矿的浮选分离试验研究,并通过Zeta电位、矿浆泡沫层等测试分析机理。结果表明:低含量高岭土不影响黄铁矿海水浮选,但高含量高岭土抑制黄铁矿海水浮选。机理分析表明:微细粒高岭土泥化罩盖在黄铁矿表面或通过机械夹带进入泡沫中,降低黄铁矿回收率。DLVO理论计算表明:弱酸条件下,高岭土主要通过端面罩盖在黄铁矿表面,而弱碱条件下,主要通过机械夹带干扰黄铁矿浮选。研究结果揭示了海水浮选黄铁矿的不利条件,为实现海水高效浮选分离黄铁矿提供了一定的指导意义,有利于拓展海水等高盐水在矿物浮选领域的应用。 | 王忠红 李育彪 向焱 杨旭 李万青 | 2023 | 金属矿山2023，，7： | 0 |
| 3 | Structural properties of residual carbon in coal gasification fine slag and their influence on flotation separation and resource utilization:A review显示文摘Coal gasification fine slag(FS)is a typical solid waste generated in coal gasification.Its current disposal methods of stockpil-ing and landfilling have caused serious soil and ecological hazards.Separation recovery and the high-value utilization of residual carbon(RC)in FS are the keys to realizing the win-win situation of the coal chemical industry in terms of economic and environmental benefits.The structural properties,such as pore,surface functional group,and microcrystalline structures,of RC in FS(FS-RC)not only affect the flotation recovery efficiency of FS-RC but also form the basis for the high-value utilization of FS-RC.In this paper,the characteristics of FS-RC in terms of pore structure,surface functional groups,and microcrystalline structure are sorted out in accordance with gasification type and FS particle size.The reasons for the formation of the special structural properties of FS-RC are analyzed,and their influence on the flotation separation and high-value utilization of FS-RC is summarized.Separation methods based on the pore structural characterist-ics of FS-RC,such as ultrasonic pretreatment-pore-blocking flotation and pore breaking-flocculation flotation,are proposed to be the key development technologies for improving FS-RC recovery in the future.The design of low-cost,low-dose collectors containing polar bonds based on the surface and microcrystalline structures of FS-RC is proposed to be an important breakthrough point for strengthening the flotation efficiency of FS-RC in the future.The high-value utilization of FS should be based on the physicochemical structural proper-ties of FS-RC and should focus on the environmental impact of hazardous elements and the recyclability of chemical waste liquid to es-tablish an environmentally friendly utilization method.This review is of great theoretical importance for the comprehensive understand-ing of the unique structural properties of FS-RC,the breakthrough of the technological bottleneck in the efficient flotation separation of FS,and the expansion of the field of the high value-added utilization of FS-RC. | Rui Han Anning Zhou Ningning Zhang Kaiqiang Guo Mengyan Cheng Heng Chen Cuicui Li | 2024 | International Journal of Minerals,Metallurgy and Materials2024，31，2： | 0 |
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