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Triboelectric properties of ilmenite and quartz minerals and investigation of triboelectric separation of ilmenite ore

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International Journal of Mining Science and Technology 2018年第2期28卷 223-230页

作者： Yang Xing Wang Haifeng Peng Zhen hao juan Zhang Guangwen Xie Weining He Yaqun Key Laboratory of Coal Processing and Efficient Utilization China University of Mining and TechnologyMinistry of EducationXuzhou 221116China School of Chemical Engineering and Technology China University of Mining&TechnologyXuzhou 221116China Jinan Yuxing Chemical Co.Ltd. Jinan 250119China Advanced Analysis&Computation Center China University of Mining&TechnologyXuzhou 221116China

Triboelectric separation, as an entirely dry technology, is a prospective method to process fine minerals.The aim of this paper is to investigate the performance of triboelectric separation of ilmenite and quartz minerals in a lab unit and to get ready for the separation of ilmenite ore. A tribocharge measurement system was used to test the triboelectric properties of ilmenite and quartz particles with tribochargers respectively made of PVC, PPR, PMMA, Teflon, copper, stainless steel and quartz glass. The results show that the ilmenite particles charged positively while quartz charged negatively when tribocharged with PVC tribocharger. The mixture of 12% ilmenite and 88% quartz was prepared for the triboelectric separation. The recovery of ilmenite increases with the increase of airflow rate, decreases with the increasing feed rate, and grows up firstly and then decreases with the increasing voltage. A maximum ilmenite recovery of 51.71% with ilmenite content 32.72% was obtained at 40 m^3/h airflow rate, 6 g/s feed rate and 20 kV voltage. According to the optimal parameters of the separation of ilmenite and quartz mixture,fine ilmenite ore with 7.55% Ti content was beneficiated using the unit and the Ti content increased to 12.32% in concentrate product.

关键词： Triboelectric separation Tribocharge Ilmenite Quartz Ilmenite ore

Effect of different milling processes on the mineral distribution in a coal powder

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International Journal of Mining Science and Technology 2012年第2期22卷 237-242页

作者： hao juan Zhang Hong Yang Keyang Lu Chao ChenJiabao Li Yanan School of Chemical Engineering and Technology China University of Mining&TechnologyXuzhou 221116China

Coal samples obtained from Wanbei(WB),Pingxiang(PX),Liupanshui(LP),and Datong(DT) mines were pulverized,using either a vibration mill or a ball mill,to different degrees of fineness.The effect of the different grinding methods on the mineral distribution within the pulverized coal was investigated by using proximate analysis,particle size analysis,and float-sink tests.The results show that the ash content in WB,PX,and DT coal increases with increasing particle size overall,while the ash content of the LP coal remain almost the same within each size fraction.In that case the ash in each fraction is similar to that of the raw coal.The ash versus size distributions for the same coal sample milled with the same grinding method to different degrees of fineness are similar.The ash versus size distribution of the coal powder with a 15% screen residue that was prepared with the vibration mill is different from the distribution of a similar sample prepared with a ball mill.The curves also vary between different coal samples.The grinding method has a great influence on the distribution of minerals across the various particle sizes.The float-sink tests and the laser particle size analysis results on PX and DT coal samples show that fines dominate the higher density fractions although the large +2.0 g/cm3 fraction was dominated by coarse particles.The size distribution of the low density fraction and +2.0 g/cm3 density fraction is bimodal.The size distribution of the intermediate density fraction is multimodal.

关键词：煤粉灰球磨过程物质分布激光粒度分析分布密度灰分含量振动磨机磨削方法

Huoxue Jiedu Huayu recipe(活血解毒化瘀方)alleviates contralateral renal fibrosis in unilateral ureteral obstruction rats by inhibiting the transformation of macrophages to myofibroblast

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Journal of Traditional Chinese Medicine 2023年第1期43卷 105-112页

作者： XIONG Yunzhao LIU Lingjin LIU Ziqian CHEN Gege hao juan GAO Xiaomeng QIANG Panpan WANG Zheng XU Qingyou Graduate School Hebei University of Chinese MedicineHebei Key Laboratory of Integrative Medicine on Liver-Kidney PatternsHebei University of Chinese MedicineHebei University of Chinese MedicineShijiazhuang 050091China Graduate School Hebei University of Chinese Medicine Hebei Key Laboratory of Integrative Medicine on Liver-Kidney PatternsHebei University of Chinese MedicineShijiazhuang 050091China Graduate School Hebei University of Chinese MedicineHebei Key Laboratory of Integrative Medicine on Liver-Kidney PatternsHebei University of Chinese MedicineDepartment of Internal MedicineHebei University of Chinese MedicineShijiazhuang 050091China

OBJECTIVE:To investigate the action and underlying mechanisms of Huoxue Jiedu Huayu recipe(活血解毒化瘀方,HJHR)against unilateral ureteral obstruction(UUO)-induced injury in the contralateral kidney.METHODS:Forty-eight male Sprague-Dawley rats weighing(200±10)g were used in this study and randomly assigned to 4 groups:a sham group,a UUO group,a UUO+eplerenone(EPL)group,and a UUO+HJHR group.The contralateral kidneys were harvested for further study 180 d after surgery.Histological analysis,immunohistochemistry and immunofluorescence were used to study the fibrosis of the contralateral kidneys obtained from UUO rats.Contralateral kidney damagerelated pathway proteins were detected by real-time polymerase chain reaction and Western blot analysis.RESULTS:HJHR significantly inhibited fibrosis of the contralateral kidney in UUO rats by attenuating the UUOinduced macrophage-to-myofibroblast transition(MMT)in the contralateral kidney.Moreover,HJHR attenuated fibrosis in the contralateral kidney of UUO rats by preventing MMT through the aldosterone/mineralocorticoid receptor/serum/glucocorticoid regulated kinase 1 pathway.CONCLUSIONS:Our findings suggest that HJHR may be a potential treatment for renal interstitial fibrosis of obstructive nephropathy.

关键词： ureteral obstruction renal fibrosis aldosterone receptors,mineralocorticoid macrophages myofibroblast Huoxue Jiedu Huayu recipe

Amberlyst-15催化木糖醇醚化反应研究

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化学工程师 2024年第4期38卷 10-13页

作者：范昊霖郝会娟张伟常艳红北矿亿博(沧州)科技有限责任公司河北沧州061108 北京北矿亿博科技有限责任公司北京100160

以酸性离子交换树脂Amberlyst-15(A-15)为催化剂,通过跟踪测定产物羟值,研究了木糖醇的醚化脱水规律。考察了反应时间、催化剂用量、反应温度对木糖醇醚化过程的影响。采用傅里叶变换红外光谱法(FTIR)和气相色谱-质谱联用法(GC-MS)分析... 详细信息

以酸性离子交换树脂Amberlyst-15(A-15)为催化剂,通过跟踪测定产物羟值,研究了木糖醇的醚化脱水规律。考察了反应时间、催化剂用量、反应温度对木糖醇醚化过程的影响。采用傅里叶变换红外光谱法(FTIR)和气相色谱-质谱联用法(GC-MS)分析了木糖醇醚化产物的结构。结果表明,当A-15用量为体系质量的0.4%~0.5%、反应温度为140~155℃、真空度为-0.1MPa、反应时间为1.5~2h时,可以将醚化产物的羟值控制在1250~1450mg KOH·g^(-1)范围内。

关键词：木糖醇 Amberlyst-15 醚化羟值

Cooper instability and superconductivity of the Penrose lattice

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Science China(Physics,Mechanics & Astronomy) 2022年第8期65卷 110-120页

作者： Yu-Bo Liu juan-juan hao Yongyou Zhang Ye Cao Wei-Qiang Chen Fan Yang School of Physics Beijing Institute of TechnologyBeijing100081China Department of Physics Southern University of Science and TechnologyShenzhen518055China Shenzhen Institute for Quantum Science and Engineering Southern University of Science and TechnologyShenzhen518055China Shenzhen Key Laboratory of Advanced Quantum Functional Materials and Devices Southern University of Science and TechnologyShenzhen518055China

Bulk superconductivity(SC) has recently been observed in the Al-Zn-Mg quasicrystal(QC). To settle several fundamental issues of the SC on the QC, we use an attractive Hubbard model to perform a systematic study on the Penrose lattice. The first issue is the Cooper instability of the QC, i.e., no Fermi surface under an infinitesimal attractive interaction. Starting from the two-electron problem outside a filled Fermi sea, we analytically prove that an infinitesimal Hubbard attraction can lead to the Cooper instability as long as the density of the state is nonzero at the Fermi level. The findings provide a basis for the SC on the QC. Our numerical results show that the Cooper pairing always takes place between two time-reversal states, satisfying Anderson’s theorem. On this theorem, we perform a mean-field(MF) study at zero and finite temperatures. The MF study shows that an arbitrarily weak attraction can lead to a pairing order, with the resulting pairing state being well described by the Bardeen-Cooper-Schrieffer theory and the thermal dynamic behaviors being well consistent with the experimental results. The second issue is about the superfluid density on the QC without translational symmetry. Our findings clarify that although the normal state of the system locates at the critical point of the metal-insulator transition, the pairing state exhibits a real SC, carrying finite superfluid density that can be verified by the Meissner effect. This finding is consistent with the experiment results. This study also reveals that the properties of the SC on the Penrose lattice are universal for all QCs.

关键词： superconductivity quasicrystal cooper instability

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铝电解烟气节能高效工艺及智能化技术研究

轻金属 2024年第5期 53-57页

作者：郝娟宋海琛李雪娇沈阳铝镁设计研究院有限公司辽宁沈阳110001

针对铝电解烟气净化系统能耗高,排放达标难,劳动强度大等卡脖子问题,配合净化工艺新技术,研发了新型氧化铝料控除渣技术,水平重力溢流分料技术,新鲜循环氧化铝混合下料系统,实现氧化铝物料的自平衡分配;开发了多参数智能控制系统,在对... 详细信息

针对铝电解烟气净化系统能耗高,排放达标难,劳动强度大等卡脖子问题,配合净化工艺新技术,研发了新型氧化铝料控除渣技术,水平重力溢流分料技术,新鲜循环氧化铝混合下料系统,实现氧化铝物料的自平衡分配;开发了多参数智能控制系统,在对净化系统进行自动监测、数据汇总及自动分析处理的基础上,自动判断系统运行情况,进行自动调整控制,实现了烟气与物料的自平衡分配与均匀混合、高效反应与低阻力分离,在有效提高烟气净化效率的同时,减少了系统能耗,降低了劳动强度。为电解烟气净化系统智能控制系统提供了技术方案。

关键词：电解烟气智能控制控制系统净化效率

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基于改进YOLOv5的路面坑洼检测研究

信息技术与信息化 2024年第5期 144-148页

作者：陈佳宁郝娟刘晓群河北建筑工程学院河北张家口075000

路面坑洼是常见的路面病害之一,危害极大,因此路面坑洼的识别与检测对人们的日常生活十分重要。基于YOLOv5算法,提出了一种改进的路面坑洼检测方法。首先,使用轻量型网络MobilNetV3替换原YOLOv5主干网络;其次,在模型的head部分加入三个... 详细信息

路面坑洼是常见的路面病害之一,危害极大,因此路面坑洼的识别与检测对人们的日常生活十分重要。基于YOLOv5算法,提出了一种改进的路面坑洼检测方法。首先,使用轻量型网络MobilNetV3替换原YOLOv5主干网络;其次,在模型的head部分加入三个无额外参数的SimAM注意力模块,以提取更加重要的通道特征,剔除无关通道信息,使模型捕获更多关键信息;最后,将原模型的损失函数更换为精度与收敛能力更加优秀的Alpha-IoU损失函数。为验证改进模型的有效性,在公开数据集Annotated Potholes Image Dataset上进行对比实验,实验结果表明,改进后的YOLOv5模型体积缩短了48%,平均检测精度与检测速度分别提高了14.8%和6.6%。改进算法能够快速有效地检测出路面坑洼,具有一定的应用价值。

关键词： YOLOv5 路面检测轻量化损失函数注意力模块

Engaging Yne-Allenes in Cycloaddition Reactions: Recent Developments

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Chinese Journal of Chemistry 2022年第10期40卷 1224-1242页

作者： Jia-Yin Wang Wen-juan hao Shu-Jiang Tu Bo Jiang School of Chemistry&Materials Science Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional MaterialsJiangsu Normal UniversityXuzhouJiangsu 221116China

Yne-allenes bearing both a C-C triple bond and an allene unit are a class of focal substrates in organic synthesis,in view of their structure diversity,.high reactivity and intermediate variety in the past years.Engaging yne-allenes in numerous annulation cascades provides efficient and direct accesses to elaborate functionalized polycyclic molecular architectures in a convergent manner.There are lots of types of catalytic chemical reactions such as intramolecular cyclizations,cycloisomerizations,intermolecular annulations,and bicyclizations as well as tricyclizations with the assistance of Lewis acids,Bronsted acids,bases,transition metals,and otherr c atalysts.This review provides an overview of the chemistry developed with transformations of yne-allenes by discussing their general and specific reactivities,presenting and commenting on their mechanisms as well as their applications.

关键词： Yne-alenes Cycloaddition Domino reactions Carbocycles Heterocycles

腹腔镜联合醋酸戈舍瑞林治疗子宫内膜异位症的临床疗效分析

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医药论坛杂志 2024年第1期45卷 87-90页

作者：曹蒙郝玉娟常璐苏宁河南科技大学附属许昌市中心医院河南许昌461670

目的研讨腹腔镜联合醋酸戈舍瑞林治疗子宫内膜异位症的临床疗效。方法收集整理2019年7月—2022年4月期间河南科技大学附属许昌市中心医院收治的子宫内膜异位症患者114例,随机分为对照组(n=57,腹腔镜治疗)和联合组(n=57,术后联合醋酸戈... 详细信息

目的研讨腹腔镜联合醋酸戈舍瑞林治疗子宫内膜异位症的临床疗效。方法收集整理2019年7月—2022年4月期间河南科技大学附属许昌市中心医院收治的子宫内膜异位症患者114例,随机分为对照组(n=57,腹腔镜治疗)和联合组(n=57,术后联合醋酸戈舍瑞林治疗),对比两组治疗前后激素水平促卵泡激素(Folli⁃cle stimulating hormone,FSH)、雌激素(estrogen,E2)、促黄体生成激素(Luteinizing hormone,LH)、妊娠率、输卵管通畅率和复发率情况。结果治疗后联合组患者E2、LH、FSH水平明显下降,治疗后有效率联合组为94.74%,对照组为82.46%,有效率情况组间对比差异明显。联合组患者妊娠率57.89%,输卵管通畅率91.23%,明显高于对照组的22.81%和47.37%;联合组复发率为1.75%明显低于对照组的29.82%(P<0.05)。结论腹腔镜联合醋酸戈舍瑞林治疗子宫内膜异位症,受孕率和治疗效果明显提高,复发率下降,安全可靠。

关键词：子宫内膜异位症手术治疗腹腔镜醋酸戈舍瑞林联合治疗效果