Last. Heekyu Choi(Changwon National University)H-Index: 11
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Abstract null null The morphology evolution of copper powder was studied under various ball-milling experimental conditions, such as low and high rotation speeds and a ball diameter of 1 mm and 10 mm. A scanning electron microscope and X-ray diffractometer were used to analyze the copper powder particle size, morphology, structure, and crystallite size. The effect of ball size on copper powder particle morphology in dry-type milling was studied using a planetary ball mill. Spherical copper powde...
#1Heng Zhou(USTB: University of Science and Technology Beijing)H-Index: 10
#2Kun Xu(USTB: University of Science and Technology Beijing)
Last. Yansong Shen(UNSW: University of New South Wales)H-Index: 26
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Abstract null null This paper presents a numerical study of the influence of burden profile on gas-solid distribution in a COREX shaft furnace through CFD-DEM model. The model takes into account the transient features of gas and particle flow under evaluation of five burden profiles, and the results show that the burden profile has a minor effect on the burden descending velocity. Caused by the segregation, the overall maximum and minimum porosities in the packed bed are observed in the case of ...
#1Mandakini Padhi(IITH: Indian Institute of Technology, Hyderabad)H-Index: 1
#2Narasimha Mangadoddy(IITH: Indian Institute of Technology, Hyderabad)H-Index: 7
Last. M. Anand(IITH: Indian Institute of Technology, Hyderabad)H-Index: 12
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Abstract null null In mineral processing circuits, the feed to hydrocyclone consists of different density particle system at varying degrees of liberation and sizes, leading to a multi-component system. These different density components' interaction affects the separation in the hydrocyclones, particularly at high feed solids concentrations. In this work, an attempt is made to account for bi-component particle interaction in a hydrocyclone at different feed solids concentrations (10–50 wt%). Fo...
Last. Jiawei Fan(Northeast Petroleum University)H-Index: 2
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Abstract null null To actually describe the flow behaviors of particles in the liquid-solid fluidized bed, the effects of liquid film covered on the particles surface and the sphericity of particles need to be considered for quasi-spherical wet particles. Liquid-solid fluidization characteristics are predicted using a two-fluid model incorporating with the kinetic theory of rough spheres (KTRS) model. Simulation results show that the normal restitution coefficient for wet particles covered liqui...
#2Wei Gao(DUT: Dalian University of Technology)H-Index: 16
Last. Kai Zhang(DUT: Dalian University of Technology)H-Index: 6
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Abstract null null Vented PMMA dust explosions were conducted in a 20-L spherical chamber with a venting diameter of 80 mm. The flame behaviors and overpressure characteristics at different dust concentrations and static activation pressure were studied. The development mechanism of external flame and the comparison results with two standards were analyzed. The results showed the reduction of dust concentration was necessary for mitigating the external flame, while blindly decreased the static a...
#1Xufeng Luo(Northeastern University (China))H-Index: 4
#2Liang Zhao(Northeastern University (China))H-Index: 17
Last. Hui Dong(Northeastern University (China))H-Index: 1
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Abstract null null In this work, DEM parameters of ellipsoid pellets were measured by means of self-made experimental device. On this basis, the effects of different roasting temperatures and equivalent diameters on DEM parameters of pellets were analyzed. In addition, the wear rate and movement velocity of different pellets in the drum were measured and extracted. Then, the applicability of measured DEM parameters of pellets is discussed. The results show that the roasting temperature of pellet...
Abstract null null A coupled thermo-mechanical (TM) model based on the combined finite-discrete element method (FDEM) was proposed to simulate the thermal cracking of rock and granular materials. For heat conduction, it links continuous and contact heat transfer simultaneously through the continuum and discrete thermal elements, and can handle thermal contacts explicitly. For thermally induced stresses, the new TM model uses the concept of multiplicative decomposition of deformation gradient, wh...