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| 1 | 逆流桨强化搅拌槽内流体混沌混合及流场结构失稳研究显示文摘在传统三斜叶桨的基础上,结合逆流桨结构,提出三斜叶逆流桨,以破坏或者消除搅拌槽内稳定的对称性流场结构,提高流体传递效率及混沌混合程度。结合实验和模拟两种方法,主要研究了上推式三斜叶桨(PBTU)、外推内压式三斜叶逆流桨(PBTC-U)、外压内推式三斜叶逆流桨(PBTC-D)三种桨叶体系以及不同外层桨叶长度的PBTC-U桨体系内搅拌功耗、混合时间、混沌特性参数、流场结构以及流体速度分布。实验结果表明,N=130 r/min时,PBTC-U桨相对于PBTU桨和PBTC-D桨,体系混合时间分别从22.0、37.5 s缩短到16.5 s,功耗分别降低了5.6%和12.8%,LLE值分别提高了13.69%和37.01%。在确定PBTC-U桨适宜外层桨叶长度的研究中发现当外层桨叶长度D_(2)=0.375D时,搅拌功耗最低且混合时间最短。PBTC-U型逆流桨通过内外层桨叶的逆流作用,强化体系内流体的随机运动,使得流场的不稳定性得到增强,对称性被破坏,进而流场结构失稳,流体混合效率得到提高。另外,PBTC-U桨可以增强流体轴、径向速度分布的波动性,有利于提高体系的混合效率。 | 刘作华 周毅林 熊黠 陶长元 王运东 | 2022 | 化工学报2022，73，1： | 6 |
| 2 | An in situ ATR-FTIR study of mixed collectors BHA/DDA adsorption in ilmenite-titanaugite flotation system显示文摘This paper researched the enhanced flotation separation performance of ilmenite and titanaugite using the mixed collector benzhydroxamic acid/dodecylamine(BHA/DDA).The interface assembly mechanism was mainly investigated through in situ attenuated total reflectance Fourier transform infrared(ATRFTIR)spectroscopy combined with the two-dimensional correlation spectroscopy(2D-COS)and X-ray photoelectron spectroscopy(XPS).It has been found that BHA/DDA mixed collectors successfully separate ilmenite from titanaugite at a molar ratio of 8:1.Zeta potential experiments suggested that,in the presence of mixed collector system,the BHA-DDA complex adsorbed on the ilmenite surface via the chemically adsorbed BHA and the electrostatically adsorbed DDA,however,the complex adsorbed on the surface of titanaugite unstably.According to in situ ATR-FTIR combined with 2D-COS and XPS results,the interface assembly mechanism of BHA/DDA is summarized as:the function group of BHA molecules first binds to the metal sites on minerals to form bidentate ligand,then DDA co-adsorbed with BHA on the surface of minerals through hydrogen bonding.DDA may change the adsorption modes of some BHA on the ilmenite surface from four-membered ring to five-membered ring,while the modes on the titanaugite surface is true opposite.Finally,recommended adsorption configurations of the BHA/DDA complex on the two mineral surfaces are proposed. | Liping Luo Houqin Wu Longhua Xu Jinping Meng Jiahui Lu Huan Zhou Xiaomei Huo Lingyun Huang | 2021 | International Journal of Mining Science and Technology2021，31，4： | 4 |
| 3 | CFD技术在浮选流场研究中的应用显示文摘浮选流场具有多相、多尺度的特点,涉及不同相之间的相互作用。现阶段通过实验很难测量、观测到完整的流场信息,而流场特征对浮选设备的分选性能往往起着关键作用。计算流体力学(computational fluid dynamics,CFD)数值模拟技术作为研究流场的有效手段,已被成功应用于浮选过程的研究和设备的开发,降低了研发成本,推进了浮选理论和技术的发展。总结分析CFD数值模拟技术在矿物浮选过程及设备流场研究方面的应用,通过CFD数值模拟技术对浮选设备内部流场进行研究,定量或定性分析浮选设备结构与工作参数、矿浆流场动力学状态、浮选动力学参数及浮选指标之间的关系,包括关键计算模型的选取、计算结果的分析、宏观流场和微观作用的数值处理及CFD数值模拟技术在矿物浮选过程及设备设计中的作用。 | 苏子旭 李晓恒 闫小康 | 2022 | 中国科技论文2022，17，1： | 3 |
| 4 | A numerical investigation of gas flow behavior in two-layered coal seams considering interlayer interference and heterogeneity显示文摘Multiple-seam gas coproduction is a technology with potential to achieve economic targets.Physical experiments could replicate gas flow dynamics in two seams.In this study,numerical simulation was conducted based on physical experiments.Through calibration,the simulated results agreed with the experimental results.Three findings were obtained.First,the pressure distribution intrinsically depends on the depressurization effectiveness in each coal seam.The gas pressure difference and interval distance influence the pressure distribution by inhibiting depressurization in the top seams and bottom seams,respectively.Second,the production contribution shows a logarithmic relationship with the permeability ratio.The range of the production contribution difference grows from 11.24%to 99.99%when the permeability ratio increases 50 times.By comparison,reservoir pressure has a limited influence,with a maximum of 13.64%.Third,the interlayer interference of the top seams and bottom seams can be intensified by the reservoir pressure difference and the interval distance,respectively.The proposed model has been calibrated and verified and can be directly applied to engineering,serving as a reference for reservoir combination optimization.In summary,coal seams with a permeability ratio within 10,reservoir pressure difference within 1.50 MPa,and interval distances within 50 m are recommended to coproduce together. | Ziwei Wang Yong Qin Teng Li Xiaoyang Zhang | 2021 | International Journal of Mining Science and Technology2021，31，4： | 3 |
| 5 | CFD技术在浮选设备中的应用进展显示文摘浮选涉及复杂流场中多个相之间的相互作用。浮选设备的分选性能是影响浮选指标的关键性因素。随着计算机流体力学(CFD)技术的不断发展及其在流体流场方面的独特优势,CFD技术在浮选领域得到广泛应用。该技术为理解浮选原理、研发与优化新设备提供了重要的研究手段。介绍了CFD技术在浮选设备内流场和选别过程中的数值模拟,分类总结了CFD技术在浮选设备中的应用及研究现状。同时,指出了CFD技术在浮选领域的发展方向。 | 赵明珠 谢佩 戴惠新 | 2023 | 黄金2023，44，10： | 0 |
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