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Feng Z.-P.,Panzhihua Steel and Vanadium Co.
Yejin Fenxi/Metallurgical Analysis | Year: 2010

The samples were dissolved in hydrochloric acid(1 + 1) and nitric acid(1 + 1). The impure elements in vanadium trioxide and vanadium pentoxide including potassium, sodium, phosphorus, sulfur and iron were determined by inductively coupled plasma atomic emission spectrometry (ICP-AES). The effects of vanadium could be eliminated by matrix matching. The working conditions were optimized. The analytical line were determined: K 766.490 nm; Na, 589.592 nm; P, 178.284 nm; S, 182.034 nni; Fe, 259.940 nm. The determination results of standard samples and actual samples were in good agreement with the certified values and those obtained by other methods. The relative standard deviation(n=11) was 0.54%-4.0%. Source


Liu C.,Panzhihua Steel and Vanadium Co. | Sun W.,Panzhihua Steel and Vanadium Co.
Proceedings of the 10th International Conference on Steel Rolling | Year: 2010

The coaling of hot-dip galvanized sheets is one of the key factors to production of galvanized products. Coating control is a sophisticated technological process, which involves proper control of the surface roughness of dipping rollers and coaling rollers of the coating machine, contact pressure between dipping rollers and coaling rollers, pressure between coating rollers and strip, strip angle, drying temperature, strip cooling, surface status of zinc coating, film uniformity, film weight and curing effect. In this paper, recommendations for coaling control are made accordingly. Based on comparative analysis of the advantages and disadvantages between horizontal roller coating and vertical roller coaling processes, control processes of vertical roller coaling followed by environmental friendly coaling and vertical roller fingerprint resistant coating are discussed in details including surface roughness of dipping rollers and coating rollers, speed of dipping rollers and coating rollers and their ratio to strip running speed, contact pressure between dipping rollers and coaling rollers, pressure between coating rollers and strip, strip angle, solidification of coating layer(including drying temperature, strip cooling, surface control of the plain plate coating). Source


Zeng J.-H.,Control Iron and Steel Research Institute, China | Wu G.-R.,Control Iron and Steel Research Institute, China | Chen Y.,Control Iron and Steel Research Institute, China | Yang S.-B.,Panzhihua Steel and Vanadium Co. | And 2 more authors.
Kang T'ieh/Iron and Steel (Peking) | Year: 2010

The sample of cold-rolled plates, hot-rolled plates and slab were analyzed with the condition of faint-sliver defects appeared in IF steel of Panzhihua Steel, and it was shown that faint-sliver defects in cold-rolled steel sheet were mainly caused by microcrack under the skin of strands, slag entrapment in mold during casting and inclusions in slab during rolling with the analysis on cold-rolled plates, hot-rolled plates and slab in Panzhihua Steel. Faint-sliver defects were controlled effectively with the technical measures, which were decreasing oxidation of ladle slag, controlling the ratio of w(CaO)/w(Al2O3) in slag, extending circulation time of deoxidization and alloying in RH furnace, controlling the casting speed and increasing the viscosity of mold fluxes. Therefore, the ratio of downgrade induced by faint-sliver defects reduced from 10.97% to 1.00%. Source


Fang S.,Huazhong University of Science and Technology | Jin S.,Huazhong University of Science and Technology | Huang S.,Huazhong University of Science and Technology | Wang Q.,Huazhong University of Science and Technology | And 5 more authors.
2011 International Conference on Electrical and Control Engineering, ICECE 2011 - Proceedings | Year: 2011

The high performance hydrogen bell-type annealer is one important kind of cold-rolled steel coils annealers. The flow of hydrogen in the inner bell is very important for the anneal of the steel coils. This paper analyses the studies on the flow of hydrogen in the inner bell of high performance hydrogen bell-type annealers, including the calculate model, numerical simulation, and experiment. Through these methods, we could get the flow of hydrogen accuracy. By improving the structure of the annealer base and the guide plate, we could optimize the flow of hydrogen in the inner bell. Such as improvements to the progress of the technical means further improving production efficiency. But it is necessary to further research the structure of the guide plate to make the flow of hydrogen better for the heat transfer of the steel coils. © 2011 IEEE. Source


Fang S.,Huazhong University of Science and Technology | Jin S.,Huazhong University of Science and Technology | Zhang Y.,Huazhong University of Science and Technology | Huang S.,Huazhong University of Science and Technology | And 4 more authors.
Advanced Materials Research | Year: 2012

The heating bell with burners is an important heating device for the high performance hydrogen bell-type annealers. The arrangement of the burners has an important impact on the heating effect. In this study, we simulated a series of model with different location of burners under the same quantity of burners and the same heating power. The result shows: (1) Under the same quantity of burners and the same heating power, when we increase the number of rows of burners, the maximum temperature inside the furnace could be reduced, and the temperature distribution will become more uniform; (2) When we fixed the number of the row of the burners, if we move the upper burners to higher position to make the arrangement of burners more uniform, the temperature distribution inside the furnace will be more uniform, this will be good for the heat transfer to the higher parts of the annealers, and this will accelerate the heating process, improve the efficiency of annealing, reduce fuel consumption, and extend the life of the inner bell. Source

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