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Jiang Z.-A.,University of Science and TechnologyBeijing | Zhang Y.-K.,University of Science and TechnologyBeijing | Wang M.,University of Science and TechnologyBeijing
Hydraulic Engineering IV - Proceedings of the 4th International Technical Conference on Hydraulic Engineering, CHE 2016 | Year: 2016

Due to deficiencies in the existing methods for removal of dust from coal mines at a fully mechanized excavation face, a more effective method is proposed in this study. It applies the swirl effect of the ventilator that is attached to the wall in the way of far-pressingnear- absorption ventilation system to gather high concentration dust to face and then combines with gas water spray to prevent and control dust. Taking 21,007 fully mechanized excavation face of coal mine as the prototype and according to actual conditions under the mine, GAMBIT software is used to establish a roadway geometry. Fluent software is used to simulate the roadway and to get the results of dust distribution with different ventilation methods. Then the simulation results are contrasted with the experiment results to get the high dust concentration zones. Based on the above results, self-actuated wet scrubber, wall attaching chimney and original gas water spray are used to prevent dust. The data from the site measurement show that dust suppression efficiency of full dust and respirable dust reaches 87%. © 2016 Taylor & Francis Group, London, UK.


Ma C.Y.,University of Science and TechnologyBeijing | Li Z.,University of Science and Technology Beijing | Xu Y.,University of Science and TechnologyBeijing | Cui G.R.,University of Science and TechnologyBeijing | And 2 more authors.
Applied Mechanics and Materials | Year: 2014

A new biosorbent prepared by using garlic peel as the raw material was investigated for the removal of methylene blue (MB) from aqueous solution. Results showed that adsorption of MB on garlic peel gel was highly pH-dependent, and equilibrium was attained in 10 min. The adsorption capacity is 440 mg MB per gram of garlic peel gel. The column adsorption results show that MB can be completely removed from aqueous solution, and 1.0 M HCl is effective to elute the adsorbed MB off the column and condense the initial MB solution to more than 40 times. The prepared garlic gel exhibits as a potential low-cost and effective adsorbent for dyes removal from waste water. © (2014) Trans Tech Publications, Switzerland.


Hao Y.,University of Science and TechnologyBeijing
European Physical Journal D | Year: 2016

Abstract: We investigate the ground state density distributions of anti-ferromagnetic spin-1 Bose gases in a one dimensional harmonic potential in the full interacting regimes. The ground state is obtained by diagonalizing the Hamiltonian in the Hilbert space composed of the lowest eigenstates of noninteracting Bose gas and spin components. The study reveals that in the situation of a weak spin-dependent interaction the total density profiles evolve from a Gaussian-like distribution to a Fermi-like shell structure of N peaks with the increasing of spin-independent interaction. The increasing spin-exchange interaction always weakens the fermionization of the density distribution such that the total density profiles show the shell structure of less peaks and even show single peak structure in the limit of the strong spin-exchange interaction. The weakening of fermionization results from the formation of composite atoms induced by the spin-exchange interaction. It is also shown that phase separation occurs for the spinor Bose gas with a weak spin-exchange interaction, meanwhile the spin-independent interaction is strong. Graphical abstract: [Figure not available: see fulltext.] © 2016, EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg.


Jiang P.,University of Science and TechnologyBeijing | Sun J.,University of Science and TechnologyBeijing | Xue W.,University of Science and TechnologyBeijing | Chen J.,University of Science and TechnologyBeijing | And 2 more authors.
Solid State Sciences | Year: 2015

Abstract Carbon free Al-Al2O3 composite sliding gate materials were successfully prepared by adding excess amount of Al powders through carbon burial sintering at 1450 °C for 6 h. Physical properties including apparent porosity, bulk density, ambient temperature crushing strength and hot rupture modulus were characterized for all the samples and addition of 9 at% aluminum powder was proved to exhibit optimal properties. The XRD and SEM results reveal that Al4O4C and AlN phases shown in the product samples are serving as reinforcement phase, contributing to better physical performances. © 2015 Published by Elsevier Masson SAS.

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