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Leaching of blended copper slag in microwave oven

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Transactions of Nonferrous Metals Society of China 2017年第6期27卷 1404-1410页

作者： M.deniz TURAN Z.Abidin SARI jan d.miller department of Metallurgical and Materials Engineering University of Firat department of Metallurgical Engineering University of Utah

Leaching of blended slag(BS)was investigated in a microwave oven using hydrogen peroxide and acetic *** BSwas a mixture of converter and flash furnace slag containing51%Fe2O3,3.8%CuO,and3.2%*** important variables thatinfluence the metal extraction yield were leaching time,liquid-solid ratio,H2O2and CH3COOH *** preferredleaching conditions were as follows:CH3COOH concentration4mol/L;H2O2concentration4mol/L;microwave power900W;leaching time30min;liquid-solid ratio25mL/g BS;leaching temperature100°*** these conditions,the metal extractions of95%Cu,1.6%Fe,and30%Zn were *** results were compared with the traditional leaching *** is evident thatmicrowave heating causes a reduction in the leaching ***,the extraction yield results indicate that selective leaching of BS canbe achieved under the preferred *** dissolution kinetic of BS in hydrogen peroxide with acetic acid is controlled by ashrinking unreacted core model *** apparent activation energy and reaction order were found to be16.64kJ/mol and1.09,respectively.

关键词： slag copper microwave selective leaching

Effects of grinding environment and lattice impurities on spodumene flotation

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Transactions of Nonferrous Metals Society of China 2019年第7期29卷 1527-1537页

作者： Guang-li ZHU Yu-hua WANG Xu-ming WANG jan d. miller dong-fang LU Xia-yu ZHENG Yue-hao ZHAO Hai-tao ZHENG School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083China College of Mines and Earth Sciences University of UtahSalt Lake City 84112USA

The effect of grinding on the spodumene flotation was investigated. The flotation response of spodumene ground by different mills was different, due to the variation of metal ions on spodumene surfaces caused by grinding environments and/or impurities. The samples were subjected to acid pickling treatment to remove most of the metal ions from the surfaces, and then all samples showed the same poor flotation response, which confirmed the significance of surface metal ions. Metal ion impurities may come from both grinding environments and lattice substitutions in spodumene. density functional theory (dFT) calculation revealed that Fe and Ca could exist as lattice substitutions on the spodumene surface while Mg substitution is unlikely to occur. Furthermore, Fe is considered to be active site for the absorption of sodium oleate on the spodumene surface. Morphology analysis showed differences in particle size and shape for samples ground by different mills, resulting in different amounts of exposed surfaces. The particle size, cleavage characteristics caused by grinding environments, and metal ion impurities originated from grinding and isomorphous substitutions, play significant roles in the chemisorption of collector on the spodumene surface.

关键词： grinding lattice substitution metal ion impurities density functional theory (dFT) calculation spodumene cleavage flotation

用溶剂化萃取剂在碱性氰化物溶液中提取金的溶剂萃取化学

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国外铀金地质 1994年第4期11卷 373-382页

作者： Michael B.Mooiman jan d.miller 李迹中南地勘局230研究所长沙410011

本文研究了利用溶剂化萃取剂,特别是TBP和dBBP从碱性氰化物溶液中萃取金的化学。未稀释的TBP在高离子强度时为一种金的有效的萃取剂。而未稀释的dBBP则不需什么离子强度调节也可用于萃取金。其他烷基磷酯、磷氧化物、亚矾和矾也可用作... 详细信息

本文研究了利用溶剂化萃取剂,特别是TBP和dBBP从碱性氰化物溶液中萃取金的化学。未稀释的TBP在高离子强度时为一种金的有效的萃取剂。而未稀释的dBBP则不需什么离子强度调节也可用于萃取金。其他烷基磷酯、磷氧化物、亚矾和矾也可用作溶剂化萃取剂。金的溶剂化萃取过程被认为是以下反应中离子对的溶剂作用结果: M^++An(CN)_2^-M^+…Au(CN)_2^- 红外光谱分析得出:TBP或dBBP与Au(CN)_2^-络合物中的中心离子金之间并不生成配位。本文讨论了利用改进的胺萃取剂萃取金时,溶剂化萃取现象的重要意义,并与活性炭吸附金进行了比较。

关键词：萃取金溶剂萃取剂氰化物溶液配合物

A Room-Temperature Chloride-Conducting Metal-Organic Crystal [Al（dMSO）6]Cl3 for Potential Solid-State Chloride-Shuttle Batteries

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Energy & Environmental Materials 2024年第1期7卷 111-117页

作者： Bing Wu jan Luxa Ji?í ?turala Shuangying Wei Luká? děkanovsky Abhilash Karuthedath Parameswaran Min Li Zdenek Sofer department of Inorganic Chemistry University of Chemistry and Technology Prague

The growing demand for substitutes of lithium chemstries in battery leads to a surge in budding novel anion-based electrochemical energy storage,where the chloride ion batteries(CIBs) take over the *** application of ... 详细信息

关键词： [Al(dMSO)6]Cl3 chloride-ion batteries ionic conductivity metal–organic solid-state electrolytes

Hybrid LES/RANS Simulations of Compressible Flow in a Linear Cascade of Flat Blade Profiles

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Journal of Thermal Science 2024年第5期33卷 1839-1850页

作者： Jaromír PRIHOdA Petr STRAKA david SIMURdA Petr SIdLOF jan LEPICOVSKY Institute of Thermomechanics of the Czech Academy of Sciences Dolejskova 1402/518200 Prague 5Czech Republic Aerospace Research and Test Centre Beranovych 13019905 PragueCzech Republic Technical University of Liberec Faculty of MechatronicsStudentska 246117 Liberec 1Czech Republic

The paper reports on 3d numerical simulations of unsteady compressible airflow in a blade cascade consisting of flat profiles using a hybrid LES/RANS approach including a transition *** a first step towards simulation of blade flutter in turbomachinery,various incidence angle offsets of the middle blade were *** simulations were run for the flow regime characterized by outlet isentropic Mach number M_(is)=0.5and zero *** results of the LES/RANS simulations(pressure and Mach number distributions)were compared to a baseline RANS model,and to experimental data measured in a high-speed wind *** numerical results show that both methods overpredict flow separation taking place at the leading *** this regard,the hybrid LES/RANS method does not provide superior results compared to the traditional RANS ***,the LES/RANS results also capture vortex shedding from the blunt trailing *** frequency of the trailing edge vortex shedding in CFd simulations matches perfectly the spectral peak recorded during wind tunnel measurements.

关键词： numerical simulation blade cascade hybrid LES/RANS

氯化钾泡沫浮选体系中捕收剂在晶体和气泡表面吸附特性研究

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氯化钾泡沫浮选体系中捕收剂在晶体和气泡表面吸附特性研究

细粒煤浮选中高内相油包水乳液的分散和吸附行为

中国化学会第十六届胶体与界面化学会议

作者：李恩泽杜志平王旭明 jan d.miller 程芳琴山西大学资源与环境工程研究所美国犹他大学冶金工程系

钾盐是一种重要的基础原料,尤其是作为钾肥应用于农业生产。目前,世界上超过80%的钾盐都是采用泡沫浮选的分离技术进行生产。在KCl的浮选过程中,捕收剂的亲水头基会在KCl晶体表面发生吸附,而疏水尾链则会吸附在气泡表面。因此,对捕收剂... 详细信息

钾盐是一种重要的基础原料,尤其是作为钾肥应用于农业生产。目前,世界上超过80%的钾盐都是采用泡沫浮选的分离技术进行生产。在KCl的浮选过程中,捕收剂的亲水头基会在KCl晶体表面发生吸附,而疏水尾链则会吸附在气泡表面。因此,对捕收剂在KCl晶体表面和气泡表面吸附特性的认知,成为研究KCl浮选机理的关键部分。在本工作中,我们详细研究了常见捕收剂(十八铵盐酸盐,OdA)在KCl晶体表面的吸附动力学和吸附等温线模型,同时考察了气泡和温度的影响。结果表明,气泡的通入能够增强OdA在KCl晶体表面的吸附量,且无论气泡是否存在,OdA在KCl晶体表面的吸附动力学都符合二级动力学模型,相应的吸附等温线模型既不符合单层吸附的Langmuir等温线模型,也不符合多层吸附的Freundlich等温线模型,说明OdA在KCl晶体表面的吸附形态极其复杂。针对捕收剂在气泡表面的吸附行为,我们通过表面压测定、和频共振光谱(SFVS)测定、以及分子动力学模拟,系统考察了不同阴离子对OdA单分子层在气/液界面堆积排列行为的影响。结果表明,外加阴离子能够插入到OdA单分子层内,从而扰乱OdA分子在气/液界面处的排列。当对OdA单分子层进行压缩时,分子层内插入的阴离子在外界压力和静电力的作用下会从界面处向体相迁移,随后屏蔽-NH头基的电荷,减少头基之间的静电斥力,致使OdA单分子层被压缩至固态时单分子最小占有面积(A)减小。以上结果加深了对OdA在KCl晶体表面和气泡表面吸附特性的认识,能够为揭示可溶盐浮选机理提供新的思路。

关键词：泡沫浮选吸附捕收剂气/液界面

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细粒煤浮选中高内相油包水乳液的分散和吸附行为

Flat-footed Females and Missing Males:A New Genus and Species of Pleciofungivoridae(diptera:Bibionomorpha)Represents the First Record of the Family from Mid-Cretaceous Kachin Amber

中国化学会第十七届全国胶体与界面化学学术会议

作者：陆英王旭明李恩泽刘卫平 jan d.miller 程芳琴国家环境保护煤炭资源化高效利用技术重点实验室低附加值煤基资源高值利用协同创新中心山西大学资源与环境工程研究所犹他大学矿业与地球科学学院

针对传统非极性油浮选氧化煤回收率低、药剂耗量大,本研究以一种高内相油包水乳化煤油（HIP W/O乳液）作为细粒氧化煤的捕收剂。由于内水相的充填作用,微浮选结果表明HIP W/O乳液作为捕收剂能显著降低煤油用量、提高浮选产率。HIP W/O... 详细信息

针对传统非极性油浮选氧化煤回收率低、药剂耗量大,本研究以一种高内相油包水乳化煤油（HIP W/O乳液）作为细粒氧化煤的捕收剂。由于内水相的充填作用,微浮选结果表明HIP W/O乳液作为捕收剂能显著降低煤油用量、提高浮选产率。HIP W/O乳液对细粒氧化煤浮选的强化取决于HIP W/O乳液在水中的分散状态和乳滴在煤表面的吸附铺展行为。高速摄像显示,HIPW/O乳液能在水中分散成小乳滴,且在搅拌条件下能稳定较长时间;通过光学显微镜进一步发现小乳滴在水中以W1/O/W2双乳液的形式存在。W1中的电解质NaCl对W1/O/W2双乳液的形成和稳定性具有决定性的影响,W1和W2间渗透压和拉普拉斯作用力达到平衡时双乳液才能稳定存在。高速摄像图片显示乳滴能在氧化煤表面吸附并慢慢铺展。由HIP W/O乳液在水中微观结构可知,乳化剂Span80分子定向排列在O-W2界面上,其亲水头基朝向W2水相。Span80分子与氧化煤表面相互作用的分子动力学模拟（MdS）结果表明,Span80分子排开氧化煤表面的水分子,亲水头基与氧化煤表面含氧官能团形成氢键,促进了乳滴在氧化煤表面的吸附和铺展,提高了细粒氧化煤的可浮性。HIPW/O乳液作为一种经济高效的细粒煤浮选捕收剂,具有替代传统非极性油的前景。

关键词：细粒氧化煤高内相油包水乳液浮选双乳液吸附

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Acta Geologica Sinica(English Edition) 2024年第3期98卷 541-547页

作者： ZHANG Qingqing Wiesław KRZEMINSKI jan SEVCIK Vladimir BLAGOdEROV Agnieszka SOSZYNSKA Kornelia SKIBINSKA Yunnan Key Laboratory for Palaeobiology Institute of PalaeontologyYunnan UniversityKunming 650500China MEC International Joint Laboratory for Palaeobiology and Palaeoenvironment Yunnan UniversityKunming 650500China State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and PaleoenvironmentChinese Academy of SciencesNanjing 210008China Institute of Systematics and Evolution of Animals Polish Academy of Sciences52551 KrakówPoland University of Ostrava Faculty of ScienceDepartment of Biology and EcologyChittussiho 10CZ-71000 OstravaCzech Republic National Museums Scotland EdinburghUK Natural History Museum LondonUK University of Lodz Faculty of Biology and Environmental ProtectionDepartment of Invertebrate Zoology and HydrobiologyBanacha 12/1690-237ŁódźPoland

A new genus and species,Cretopleciofungivora simpsoni *** ***.,from the extinct family Pleciofungivoridae(diptera:Bibionomorpha),is discovered in mid-Cretaceous Kachin ***,this family was known only from imprints in sedimentary rocks of the Jurassic and the Lower *** of a representative of Pleciofungivoridae in Kachin amber confirms the presence of the family in the Upper *** new species has a unique structure of fore tarsus,with lobed and extended tarsal segments Ⅱ to Ⅳ,a feature hitherto known only in a few species of extant *** not particularly rare,the new species is currently known only from female *** reasons for this phenomenon,very unusual in Sciaroidea,are briefly discussed,including parthenogenesis as a potentially plausible hypothesis.

关键词： fungus gnats Sciaroidea Upper Cretaceous Burmese amber swollen tarsomeres

Ab initio density response and local field factor of warm dense hydrogen

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Matter and Radiation at Extremes 2024年第5期9卷 48-67页

作者： Tobias dornheim Sebastian Schwalbe Panagiotis Tolias Maximilian P.Böhme Zhandos A.Moldabekov jan Vorberger Center for Advanced Systems Understanding(CASUS) D-02826 GörlitzGermany Helmholtz-Zentrum dresden-Rossendorf(HZdR) D-01328 DresdenGermany Space and Plasma Physics Royal Institute of Technology(KTH)Stockholm SE-10044Sweden Technische Universität dresden D-01062 DresdenGermany

We present quasi-exact ab initio path integral Monte Carlo(PIMC)results for the partial static density responses and local field factors of hydrogen in the warm dense matter regime,from solid density conditions to the strongly compressed *** full dynamic treatment of electrons and protons on the same footing allows us to rigorously quantify both electronic and ionic exchange–correlation effects in the system,and to compare the results with those of earlier incomplete models such as the archetypal uniform electron gas or electrons in a fixed ion snapshot potential that do not take into account the interplay between the two *** full electronic density response is highly sensitive to electronic localization around the ions,and our results constitute unambiguous predictions for upcoming X-ray Thomson scattering experiments with hydrogen jets and fusion *** PIMC results are made freely available and can be used directly for a gamut of applications,including inertial confinement fusion calculations and the modeling of dense astrophysical ***,they constitute invaluable benchmark data for approximate but computationally less demanding approaches such as density functional theory or PIMC within the fixed-node approximation.

关键词： local incomplete rigorous