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Physical Simulation of Molten Slag Granulation by Rotary Disk

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Journal of Iron and Steel Research International 2013年第9期20卷 26-32页

作者： MIN Yi HUANG Jian LIU Cheng-jun JIANG Mao-fa YU xue-qing School of Materials and Metallurgy Northeastern University Benxi Steel Group Corporation

A physical model of molten slag granulation by rotary disk was developed based on the mechanism of New-tonian liquid granulation. For geometrical similarity, the radius ratio of model disk to the prototype disk was chosen as 1 ： 1. For dynamic similarity, equality of Ohnesorge number between the model and the prototype was achieved firstly by compounding rosin and paraffin wax with mass ratio of 4 ~ 1 as simulation liquid of molten blast furnace （BF） slag, and the simulation material can satisfy the similarity of liquid solid transformation during falling in the medium; then equality of Reynolds number and Weber number was obtained by controlling the volumetric flow rate and the rotary speed, respectively. Model accuracy was verified by comparing the simulation data with the results re ported in literature, which showed good agreement with the calculation results of empirical equation and the actual molten BF slag granulation from the view point of particle size. Furthermore, influences of disk radius, rotary speed and liquid flow rate on granulation were discussed using the developed model, and the Kitamura equation was modi-fied according to the simulation data which can predict particle size more accurately. Using the modified equation, the operation parameters were predicted according to the flow rate of molten industrial BF slag.

关键词： physical model simulation liquid molten slag granulation rotary disk

Layered K_(0.54)Mn_(0.78)Mg_(0.22)O_(2)as a high-performance cathode material for potassium-ion batteries

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Nano Research 2022年第4期15卷 3143-3149页

作者： Ruling Huang qing xue Jiao Lin Xixue Zhang Jiahui Zhou Feng Wu Li Li Renjie Chen Beijing Key Laboratory of Environmental Science and Engineering School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China State Key Laboratory of Advanced Power Transmission Technology Global Energy Interconnection Research Institute Co.Ltd.Beijing 102209China Guangdong Key Laboratory of Battery Safety Guangzhou Institute of Energy TestingGuangzhou 511447China Collaborative Innovation Center of Electric Vehicles in Beijing Beijing 100081China Institute of Advanced Technology Beijing Institute of TechnologyJinan 250300China

Layered Mn-based oxides are one of the promising cathode materials for potassium-ion batteries(KIBs)owing to their high theoretical capacities,abundant material supply,and simple synthesis ***,the structural deterioration resulting from the Jahn-Teller effect of Mn ions hinders their further development in ***,a novel Mn-based layered oxide,K_(0.54)Mn_(0.78)Mg_(0.22)O_(2),is successfully designed and fabricated as KIBs cathode for the first *** delivers smooth charging/discharging curves with high specific capacity of 132.4 mAh·g^(‒1)at 20 mA·g^(‒1)and good high-rate cycling stability with a capacity retention of 84%over 100 cycles at 200 mA·g^(‒1).Combining in-situ X-ray diffraction(XRD)and ex-situ X-ray photoelectron spectroscopy(XPS)analysis,the storage of K-ions by K_(0.54)Mn_(0.78)Mg_(0.22)O_(2)is revealed to be a solid-solution processes with reversible slip of the crystal *** studies suggest that the rational doping of inactive Mg2+can effectively suppress the Jahn-Teller effect and provide outstanding structure *** work deepens the understanding of the structural evolution of Mn-based layered materials doped with inactive materials during de/potassiation processes.

关键词： potassium-ion batteries layered metal oxide cathode Jahn−Teller effect Mg doping structural deterioration

Semileptonic decays B/Bs→(D^(?),D^(?)s)lνl in the PQCD approach with the lattice QCD input

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Chinese Physics C 2020年第5期44卷 8-21页

作者： xue-qing Hu Su-Ping Jin Zhen-Jun Xiao Department of Physics and Institute of Theoretical Physics Nanjing Normal UniversityNanjing 210023China Jiangsu Key Laboratory for Numerical Simulation of Large Scale Complex Systems Nanjing Normal UniversityNanjing 210023China

We study the semileptonic B/Bs→(D^(?),D^(?)s)lνl decays in the framework of the Standard Model(SM),by employing the perturbative QCD(PQCD)factorization formalism combined with the lattice QCD input for the relevant transition form *** calculate the branching ratios B(B(s)→D^(?)(s)lνl)with l=(e,μ,τ),the ratios of the branching fractions R(D^(?))and R(D^(?)s),and the physical observables Pτ(D^(?)(s)),FL(D?(s))and AFB(τ).The“PQCD+Lattice”predictions for B(B→D^(?)lνl)and R(D^(?))agree with the available experimental measurements within *** the ratios R(Ds)and R(D^?s),the"PQCD+Lattice"predictions agree with the other *** Pτ(D^?)and FL(D^?),our theoretical predictions agree with the measured values within *** theoretical predictions of the semileptonic B/Bs decays considered could be tested in the near future by the LHCb and Belle II experiments.

关键词： semileptonic decays form factor PQCD Bs meson

Induction of apoptosis of lymphocytes in ratmucosalimmune system

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World Journal of Gastroenterology 1998年第1期4卷 24-28页

作者： CHEN xue-qing ZHANG Wan-Dai SONG Yu-Gang ZHOU Dian-Yuan 不详

IM To undergo apoptosis during negative and positive selection processes in rat mucosal immune system which are implicated in the pathogenesis of various mucosal diseases. METHODS Female SpragueDawley rats were given protein synthesis inhibitor, cycloheximide, intravenously or intraperitoneally, an apoptosis was recognized by morphological hallmark under light and electronmicroscopy, and the expression of proliferating cell nuclear antigen was visualized immunohistochemically. RESULTS The apoptosis of mucosal lymphocytes in the digestive tract, as well as in trachea, uterus and lacrimal gland was induced by cycloheximide (>10mg·kg-1 body weight), which were located mainly in lamina propria and germinal centers of lymphoid nodules. At the same time, a portion of crypt epithelial cells of proliferating zone in small and large intestine, and the epithelial cells in genital tract were also found to undergo apoptosis. Immunostainings showed that apoptotic cells expressed proliferating cell nuclear antigen. CONCLUSION Apoptosis of lymphocytes in mucosal immune system can be induced by cycloheximide. This model will facilitate the understanding of normal mucosal immune system and its role in the pathogenesis of related diseases such as inflammatory bowel diseases.

关键词： mucosal immune system cycloheximide proliferating cell nuclear antigen immunohistochemistry

Synthesis and Characterization of PEG-scuteilarin Conjugates,a Potential PEG Ester Prodrug for the Oral Delivery of Scutellarin

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Chinese Chemical Letters 2006年第1期17卷 85-88页

作者： qing Song ZHOU xue Hua JIANG Jia Rui YU Ke Jia LI West China School of Pharmacy Sichuan University Chengdu 610041

Highly water soluble esters of scutellarin with variable molecular weight polyethylene glycol （PEG） were prepared via PEGylation. The physicochemical properties and the stabilities under different conditions were investigated. By PEG modification, the greatly increased water solubility and desirable partition coefficient of scuteUarin were obtained, and the results showed that these conjugates were potential prodrugs for the oral delivery of scuteUarin.

关键词： Scutellarin PEGylation prodrug physicochcmical properties stability.

Fatigue Damage Mechanism of Oil Film Bearing Sleeve

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Journal of Iron and Steel Research International 2007年第1期14卷 60-63,68页

作者： HUANG qing-xue WANG Jian-mei MA Li-feng ZHAO Chun-jiang School of Mechanical and Electrical Engineering Taiyuan University of Science and Technology Taiyuan 030024 Shanxi China School of Mechanical Design and Automation Taiyuan University of Technology Taiyuan 030024 Shanxi China

With the rapid development of the steel industry, to keep pace with the current trend of high speed, continuous, and large-scale production that focuses on automation and high levels of efficiency, many state-owned steel companies are being equipped with oil film bearings. Through long-term on-spot inspection and research on the fatigue failure of oil film bearing, three segments of annulated fatigue breakage were found axially along the inner surface of the bearing sleeve. In order to elucidate the reason for the three-segment annulated damage under rolling load, numerical boundary element method was adopted to analyze the contact behaviors between the sleeve and rollneck. Failure mechanism was discussed in detail, the distributions of contact stress were analyzed, and the service lives of the sleeve for different positions on the inner surface were quantitatively described, which provided an effective means to decrease wear and adhesive damage of the sleeve and to increase the load capacity of oil film bearing and its service life as well.

关键词： oil film bearing fatigue failure analysis contact problem bearing life

Semileptonic decays B_c■(η_c, J/ψ)l■_l in the “PQCD+Lattice” approach

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Chinese Physics C 2020年第2期44卷 51-61页

We study the semileptonic decaysBc-→(ηc,J/ψ)l-■lusing the PQCD factorization approach with the newly defined distribution amplitudes of the B c meson and a new kind of parametrization for extrapolating the form factors which takes into account the recent lattice QCD *** find the following main results:(a)the PQCD predictions of the branching ratios of theBc→(ηc,J/ψ)l■decays are smaller by about 5%-16%when the lattice results are taken into account in the extrapolation of the relevant form factors;(b)the PQCD predictions of the ratio Rηc,RJ/ψand of the longitudinal polarization PτareRηc=0.34±0.01,RJ/ψ=0.28±0.01,Pτ(ηc)=0.37±0.01and Pτ(J/ψ)=-0.55±0.01;and(c)after including the lattice results,the theoretical predictions slightly change:Rηc=0.31±0.01,RJ/ψ=0.27±0.01,Pτ(ηc)=0.36±0.01andPτ(J/ψ)=-0.53±*** theoretical predictions of RJ/ψagree with the measurements within the *** other predictions could be tested by the LHCb experiment in the near future.

关键词： semileptonic Bc decays PQCD approach lattice QCD results ratio of branching ratios longitudinal polarization

Microstructure evolution of coke under CO2 and H2O atmospheres

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Journal of Iron and Steel Research International 2020年第7期27卷 743-754页

作者： Jun Zhao Hai-bin Zuo Chao Ling Wen-tao Guo Jing-song Wang qing-guo xue State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

The microstructure of coke has an important influence on its thermal *** solution loss reactions of coke in CO2 and H2O atmospheres were investigated by in situ *** results showed that the isotropic components had a more vigorous reaction than the anisotropic components,and the solution loss reaction of the fine-grained mosaic structure was faster than that of the coarse-grained mosaic structure under the CO2 and H2O *** coarse-grained mosaic structure and the flowing structure had a relatively higher anti-erosion ability in the CO2 atmosphere than in the H2O atmosphere,and there was no distinct difference in the solution loss of the isotropic structure under the CO2 and H2O *** electron probe microanalysis showed that the Al-Si-Fe compounds in the carbon matrix had positive influence on the solution loss reaction of the anisotropic *** iron compounds were able to destroy the pore walls of coke and accelerate the solution loss rate of coke.

关键词： Coke Microstructure Solution loss reaction In situ observation Atmosphere

Synthesis of a trimeric lignin model compound composed of a-O-4 and b-O-4 linkages under microwave irradiation

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Chinese Chemical Letters 2013年第12期24卷 1091-1094页

作者： Xin-Ping Ouyang Chun-Lei Liu Yu-Xia Pang xue-qing Qiu School of Chemistry & Chemical Engineering South China University of Technology

A trimeric lignin model compound composed of α-O-4 and β-O-4 linkages was prepared by the microwave-assisted synthesis, which consisted of three steps：（a） the synthesis of 3-methoxy-4- benzyloxyacetophenone （2） from acetovanillone （1）, （b） the bromination of compound 2 to produce 3- methoxy-4-benzyloxy-α-bromoacetophenone （3）, and （c） followed by a nucleophilic substitution of compound （3） to obtain 3-methoxy-4-benzyloxy-α-（3-methoxy-4-（1-propenyl）phenol）-acetophenone （4）. The target product was characterized by MS, 1H NMR and 13C NMR spectroscopy. It was found that the trimeric compound synthesized can be used as a preferable lignin model compound because it contains guaiacyl structural unit （3-methoxy-4-hydroxy phenyl propane） linked by α-O-4 and β-O-4 linkages. In addition, under the conditions of microwave irradiation, the reaction time of each step is significantly reduced, and the selectivity of target product is greatly improved. The yields of each step and the overall sequence are 95.31%. 87.3%. 90.6% and 75.4% （95.31%× 87.3% × 90.6%）. respectively.

关键词： Lignin Microwave irradiation Model compound Synthesis