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	1. Hydrodynamic study impact effect between top blown jet and molten bath of 80 t convert
	LI Nan,CAO Lingling,LIU Qing,LIN Wenhui,GUO Weida,Ren Keshe
	Metallurgical Engineering 10 November 2017
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	Abstract:Based on the similarity theory, the influence of the lance height, the gas flowrate and the holes of oxygen lance on the impact effects and mixing behavior in the molten bath were investigated by hydrodynamics experiment using 1:6 water model for 80 t basic oxygen furnace. The results show that the impact diameter, the penetration depth and the cavity shape index all increase with increasing gas flowrate. The optimal mixing time of the bath is 38 s by controlling the oxygen lance height at 138.55 mm. Under the same condition, the mixing effect of the 4-hole nozzle is better than that of the 5-hole nozzle. In addition, the quantitative relation between the dimensionless penetration depth and Fr\' is deducted.
	TO cite this article:LI Nan,CAO Lingling,LIU Qing, et al. Hydrodynamic study impact effect between top blown jet and molten bath of 80 t convert[OL].[10 November 2017] http://en.paper.edu.cn/en_releasepaper/content/4741983


	2. Coupled numerical simulation on Fluid Flow, Heat Transfer and Solidification in Bloom Continuous Casting Mold
	WEN Yanmei,LIU Shaowei,HAN Yanshen,LI Youhuai,LIU Qing,GUAN Min
	Metallurgical Engineering 10 November 2017
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	Abstract:Taking bloom mold with cross-sectional dimension 240mm×240mm as research object，a three-dimensional mathematical model was established to research effects of the submergence depth of the submerged entry nozzle (SEN) and casting speed on flow field and solidification taking effect of air-gap into account. The simulation result shows that the impact depth in mold with one port SEN is deep which is good for uniform growth of solidified shell. Meanwhile, the air gap has evident effect on corner temperature which is more practical than ignoring air gap. In addition, the distance between backflow vortex core and free surface increases and backflow vortex core moves up obviously, with the increasing of SEN-depth. Solidified shell thickness decreases from 32.43 mm to 17.83 mm with the casting velocity from 0.5 m/min to 0.9 m/min. In conclusion, according to the comparative analysis, the optimal combinations of process parameters are the depth of SEN of 100mm and the casting speed of 0.7 m/min in order to ensure the production efficiency and the bloom quality for the 42CrMo steel with cross-sectional dimension 240 mm×240 mm.
	TO cite this article:WEN Yanmei,LIU Shaowei,HAN Yanshen, et al. Coupled numerical simulation on Fluid Flow, Heat Transfer and Solidification in Bloom Continuous Casting Mold[OL].[10 November 2017] http://en.paper.edu.cn/en_releasepaper/content/4741984


	3. Rotating disc electrode measurements of oxygen reductionreaction on natural massive pyrite in acidic media
	CHEN Guobao,YANG Hongying
	Metallurgical Engineering 18 March 2016
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	Abstract:In the current study, rotating disk electrode (RDE) measurements were performed to gain insight into the oxygen reduction reaction (ORR) performance of the natural massive pyrite electrode in acidic media. Cyclic voltammetry (CV) and linear sweep voltammetry (LSV) were also performed. The tafel slopes and electron transferred numbers were calculated according to the test results. The ORR process took place in the potential range of ?0.450 V to 0.050 V vs. AgCl/Ag. The average transferred electron number for ORR on pyrite in sulfuric acid was near to 2. The addition of ferric ion was shown to increase the dissolution rate of pyrite and the transferred electron numbers for ORR. At high concentration of ferric ion, the ORR process was inhibited attributing to a Fenton-like reaction mechanism and more intermediate H2O2 was produced accordingly.
	TO cite this article:CHEN Guobao,YANG Hongying. Rotating disc electrode measurements of oxygen reductionreaction on natural massive pyrite in acidic media[OL].[18 March 2016] http://en.paper.edu.cn/en_releasepaper/content/4681002


	4. Investigation of surface species during bioleaching of chalcopyrite by moderately thermophilic bacteria
	WANG Jun,ZHAO Hongbo,TAO Lang,CAO Pan,QIN Wenqing,QIU Guanzhou
	Metallurgical Engineering 08 January 2015
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	Abstract: Electrochemical measurement, X-ray diffraction analysis (XRD) and X-ray photoelectron experiment (XPS) analysis were carried out to investigate the surface species and interfacial reactions during bioleaching of chalcopyrite by different strains of moderately thermophilic bacteria. Results showed that CuS and disulfide (S22-) were the main intermediate species on the surface of chalcopyrite during bioleaching by A. caldus, S. thermosulfidooxidans and L. ferriphilum. The low kinetics of dissolution of chalcopyrite in A. caldus can be mainly due to the incomplete dissolution of chalcopyrite and the passivation layer of polysulfide. Polysulfide and jarosite can be mainly responsible for the passivation of chalcopyrite in bioleaching by L. ferriphilum or by S. thermosulfidooxidans.
	TO cite this article:WANG Jun,ZHAO Hongbo,TAO Lang, et al. Investigation of surface species during bioleaching of chalcopyrite by moderately thermophilic bacteria[OL].[ 8 January 2015] http://en.paper.edu.cn/en_releasepaper/content/4625972

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