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Qinhuangdao, China

Chen G.-J.,Shougang Institute of Technology | Wu G.,SHOUGANG Group | Liu N.-H.,Shougang Institute of Technology | Ge H.,China Steel Corporation | Yang M.,Shouqin Metal Material Co.
Energy Materials 2014, Conference Proceedings | Year: 2014

Great progress of energy conservation in SHOUGANG is made in recent years, but there is still some gap compared with international advanced steel enterprises. To lower steel comprehensive energy consumption and dig its energy-saving potential in SHOUGANG further, method of energy consumption theory analysis is applied in steel comprehensive consumption benchmarking from the factors such as technical flow, process energy consumption and steel ratio coefficient in SHOUGANG three new-built plants such as SHOUQIN, QIANGANG and JINGTANG. Analysis result shows that it is the effective approach to lower steel comprehensive consumption by shortening flow, lowering process energy consumption in iron-making and iron-steel ratio. By benchmarking of process energy consumption in SHOUGANG three new-built plants, it shows that iron-making process energy consumption in QIANGANG is lowest, sinter and steel-making process energy consumption in SHOUQIN is lowest and hot rolling process energy consumption in JINGTANG is lowest, but higher than the advanced Chinese steel enterprises, so some basic measures to lower energy consumption are put forward, and the best optimizing effect of steel energy-saving can be reached by combining and optimizing with single equipment and systemic energy-saving technology on the base of single energy-saving technology applied fully and energy efficiency of single equipment exerted further. Source


Wang H.-B.,University of Science and Technology Beijing | Wang H.-B.,Shougang Institute of Technology | Zhang J.-M.,University of Science and Technology Beijing | Zhao X.-Y.,Shougang Institute of Technology | And 3 more authors.
Kang T'ieh/Iron and Steel | Year: 2013

The samples of diameter 10 mm were made to simulate slab surface. The experiment was made to control the samples cooling at traditional cooling pattern and controlled cooling pattern respectively. Furthermore, the microstructure of transverse section was observed under a metallographic microscope to study the influence on microstructure of slab surface of cooling pattern. The experiment results are as follows: Using traditional cooling pattern, the microstructure is massive ferrite and pearlite by the side of the sample. The grain sizes are between 10-200μm. Moreover the microstructure is strip ferrite, acicular ferrite and pearlite at the center area, the grain sizes are bigger, and the microstructure is uneven. Under controlled cooling conditions, the microstructure is massive ferrite and pearlite. The grain sizes are between 9.36-12.25μm and that the grains are small and the microstructure is even. The controlled cooling pattern can promote refinement grains to increase the hot ductility of slab surface, which will have positive effect on avoiding the occurrence of surface transverse cracks. Source


Zhu Z.-Y.,Shouqin Metal Material Co. | Zhen X.-G.,Shouqin Metal Material Co. | Jiang H.-T.,Shouqin Metal Material Co. | Li J.-G.,Shouqin Metal Material Co. | And 2 more authors.
Kang T'ieh/Iron and Steel (Peking) | Year: 2011

Factors influencing transverse cracks such as compositions of liquid steel, casting powder, mold oscillation, SEN, secondary cooling, and so on, were investigated. The results show that the compositions of liquid steel and the mechanical properties in the low ductility region III are the internal reasons which effect transverse cracks; Strong cooling in secondary cooling area and the straightening force are the external cause. Based on these reasons mentioned above, some effective countermeasures were proposed in 400 mm ultra-thick slabs: the SEN with concave bottom, the thickness of liquid slag film keeps 8-13 mm, soft cooling in secondary cooling area, the surface temperature of slabs in vertical segment keeps above 1100°C, the surface temperature in straighten segment keeps above 940°C. With all these countermeasures, the transverse cracks incidence of the ultra-thick slabs has been reduced to 4.88%, and the surface quality of slabs has been effectively improved. Source


Zhao X.-Y.,Shougang Institute of Technology | Liu Y.,Shougang Institute of Technology | Zhen X.-G.,Shouqin Metal Material Co. | Wang H.-B.,Shougang Institute of Technology | And 2 more authors.
Kang T'ieh/Iron and Steel | Year: 2013

The samples of diameter 10 mm were made to simulate slab surface. The variation of hot ductility and microstructure morphology of slab surface during the period of intensive cooling and reheating treatment under surface structure controlled cooling was studied with the Gleeble-2000D hot simulation tester. The theoretical basis will be provided to apply on vertical bending caster of surface structure control cooling. The results show that; the hot ductility of the samples is deteriorated because of the form of widmanstatten structure and film-like proeutectoid ferrite along grain boundary during the period of intensive cooling. However, the treatment of reheating can effectively eliminate the deterioration of hot ductility producing during the period of intensive cooling, which makes the reduced area of the samples increasing to over 40%. Therefore, the treatment of intensive cooling should be accomplished before the slab enters the segment of bending. The slab can enter the bending segments during the period of reheating when the controlled cooling is applied on vertical bending caster. Source


Zhen X.-G.,Shouqin Metal Material Co. | Zhu Z.-Y.,Shouqin Metal Material Co. | Yang J.-P.,Shouqin Metal Material Co. | Wang Y.-L.,Shouqin Metal Material Co. | And 2 more authors.
Kang T'ieh/Iron and Steel | Year: 2013

Factors influencing transverse cracks such as the thickness of slabs, the carbon and niobium content in liquid steel, the casting speed, the dynamics model and the technology of 3D sprays, were investigated. The results show that, because of the defects in the dynamic secondary cooling model, for the ultra-thick slabs with low casting speed, by the minimum water restrictions of the secondary cooling zone, and under the comprehensive action of the straightening force and the thermal stress, if the total strain of shell is more than its critical strain, the transverse cracks finally forms along the grain boundary, located at the vibrating mark trough distance slab corner 150-500 mm. Source

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