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Tangshan, China

Liu Z.-X.,Hebei Polytechnic University | Li Z.,Hebei Polytechnic University | Li Z.,Hebei Iron and Steel Group | Ai L.-Q.,Hebei Polytechnic University | Jia Y.-N.,Hebei Polytechnic University
Kang T'ieh/Iron and Steel (Peking) | Year: 2011

Based on stress inheriting characteristics of shell in continuous casting, the two-dimensional stress analysis model was established. The stress inheriting behavior was achieved by initial stress method in ANSYS. The analysis results show that the displacement and stress distribution on the shell calculated by inherited stress analysis model is basically the same as the results by traditional method. The stress values obtained by the inheriting method are obviously larger. The maximums of equivalent stress are 12% and 70% larger in the middle and corner area respectively.

Yang J.W.,Hebei Iron and Steel Group | Yang J.W.,Hebei United University | Wu J.,Tangshan College
Advanced Materials Research | Year: 2013

There are two reasons to causes of defects of acid rolling line equipment and hot-rolled raw materials problems, so it is necessary to analyse the cold-rolled strip surface foreign body pressed into the defect microstructure and composition. It is found that this defect can be eliminated by improving the quality of the raw material, controlling strip shape, making reasonable squeezed roll transformation system, making the implementation of effective management of the full range of roll surface, carrying out the whole process of clean production, effectively controlling of the cold-rolled strip foreign body pressed into the generation of defects. © (2013) Trans Tech Publications, Switzerland.

Wang Y.-F.,Hebei Iron and Steel Group | Hu Z.-G.,Hebei Iron and Steel Group | Zhao Y.-L.,Hebei Iron and Steel Group | Li J.,Hebei Iron and Steel Group
Kang T'ieh/Iron and Steel | Year: 2013

The electric characteristic curves for Hebei Steel 150t LF were analyzed by using electric characteristic optimizing model. The reasonable electric supply systems were proposed according to work point technical parameters of first four levels; the optimization efficiently reduced refining time and improved heating efficiency. The results show that the speed of heating-up of 150t ladle furnace is from 2.46 to 4.25°C/min for the first four levels. Through optimizing power supply system, the heating-up speed can be improved 0.93°C/min and power factor at heating stage is increased from 0.5 to 0.72, heat efficiency is increased from 0.68 to 0.82, and the cost of product is reduced four yuan/t.

Sun X.-S.,Hebei Iron and Steel Group | Wang Y.-R.,Hebei Iron and Steel Group | An G.-M.,Hebei Iron and Steel Group | Zhang H.-Y.,Hebei Iron and Steel Group
Yejin Fenxi/Metallurgical Analysis | Year: 2015

A rapid method for the determination of nine elements including V, Ti, Al, Mg, Mn, K, Na, Pb, Zn in V-Ti sinters was established by inductively coupled plasma atomic emission spectrometry (ICP-AES) with microwave digestion sample preparation. After being digested by aqua regia, the sample was determined at the selected wavelength. The matrix and coexisting elements had no spectral interference with the testing elements. The matrix effect could be eliminated through matrix matching. The calibration curve was linear within the mass fraction of 0.01%-3.00% for V, Ti, Al and Mg and 0.001%-0.35% for Mn, K, Na, Pb and Zn, with the linear correlation coefficient (r) all larger than 0.999. When this method was applied to determine the standard sample of V-Ti sinters, the found values of the above elements were consistent with the certified values. Al, V, Ti, Mn, Mg, Zn, K, Na and Pb in one V-Ti sample were determined for ten times, obtaining the relative standard deviations all smaller than 5%. The proposed method is applicable to production detection. ©, 2015, Central Iron and Steel Research Institute. All right reserved.

Hu Z.-G.,Hebei Iron and Steel Group | Wang Y.-F.,Hebei Iron and Steel Group | Li J.,Hebei Iron and Steel Group | Fan J.,Hebei Iron and Steel Group | Li J.-B.,Hebei Iron and Steel Group
Kang T'ieh/Iron and Steel | Year: 2012

Based on the "pressure feedback", the soft reduction system was developed by HBIS, which included segment equipments with the target of control pressure and control system of the liquid-core in slab based on "pressure feedback". After application in Han Steel, the caster realized visual pouring steel operation. The production stability and quality of slab was improved. The output of caster was increased by 17%, the central segregation can be controlled 100% below the class C 2.0, and the caster roll consumption was decreased 50%. The layer rate of medium plate, which was rolled from the slab produced by the caster, was decreased from 2.92% to 1.01%.

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