The technology for spraying a sintering bed and thus improving sinter quality indicators while reducing the emission of flue gas pollutants has recently become an important research topic.The impacts on sinter quality...The technology for spraying a sintering bed and thus improving sinter quality indicators while reducing the emission of flue gas pollutants has recently become an important research topic.The impacts on sinter quality and emissions when spraying the sintering surface with different amounts and flow rates of steam were investigated in this study.The sinter quality indicators were most effectively improved by spraying 180 g of steam flow continuously at a rate of 0.02 m^(3)/min for 15 min after ignition for 8 min.The optimal effect on emission reduction was obtained by spraying 90 g of steam flow continuously at a rate of 0.01 m^(3)/min for 15 min after ignition for 8 min.展开更多
The development of continuous casting technology of electrical steel was analyzed. The technologies and products characteristics of conventional continuous casting, thin slab continuous casting and rolling, middle thi...The development of continuous casting technology of electrical steel was analyzed. The technologies and products characteristics of conventional continuous casting, thin slab continuous casting and rolling, middle thin slab continuous casting and rolling and twin-roll thin strip were compared. Conventional continuous casting technology was widely adopted in producing electrical steel, thin slab continuous casting and rolling and middle thin slab contin- uous casting and roiling technology industrialized electrical steel~ and study of twin-roll thin strip casting technology was focused on fundamental experiments.展开更多
Effects of microwave heating on the pore fractal properties of blast furnace sludge （BFS） and relative mechanism were studied. The results show that the morphology features of iron bearing sinter and coke particles,...Effects of microwave heating on the pore fractal properties of blast furnace sludge （BFS） and relative mechanism were studied. The results show that the morphology features of iron bearing sinter and coke particles, which are the main constituents of the BFS, were remarkably changed by microwave heating. The porosity, surface roughness and specific surface area of modified particle surface all increased obviously. Combining with fractal meth-od called Sierpinski model, the fractal dimensions of sinter, coke and others increased from 2.35, 2.24 and 2.58 to 2.65, 2.44 and 2.61 respectively, after modification by microwave heating. The results predicted that the reaction mechanism of microwave heating for BFS is related to two aspects. Different mineral phases existed in BFS particles incline to dissociate each other due to their different microwave absorbability~ some recombination or reconstruction of matters or structure leads to structure defects, which have great influences on the surface morphology characteris-tics and chemical properties. The research indicated that fractal dimension can be used as an effective factor for quan-titative analysis of the pore changes in morphology of the sludge. Furthermore, it is helpful for separation and ex- traction of valuable constituent from BFS.展开更多
文摘The technology for spraying a sintering bed and thus improving sinter quality indicators while reducing the emission of flue gas pollutants has recently become an important research topic.The impacts on sinter quality and emissions when spraying the sintering surface with different amounts and flow rates of steam were investigated in this study.The sinter quality indicators were most effectively improved by spraying 180 g of steam flow continuously at a rate of 0.02 m^(3)/min for 15 min after ignition for 8 min.The optimal effect on emission reduction was obtained by spraying 90 g of steam flow continuously at a rate of 0.01 m^(3)/min for 15 min after ignition for 8 min.
文摘The development of continuous casting technology of electrical steel was analyzed. The technologies and products characteristics of conventional continuous casting, thin slab continuous casting and rolling, middle thin slab continuous casting and rolling and twin-roll thin strip were compared. Conventional continuous casting technology was widely adopted in producing electrical steel, thin slab continuous casting and rolling and middle thin slab contin- uous casting and roiling technology industrialized electrical steel~ and study of twin-roll thin strip casting technology was focused on fundamental experiments.
基金Item Sponsored by National Natural Science Foundation of China(51204004)University Science Research Project of Anhui Province of China(KJ2013Z017)
文摘Effects of microwave heating on the pore fractal properties of blast furnace sludge （BFS） and relative mechanism were studied. The results show that the morphology features of iron bearing sinter and coke particles, which are the main constituents of the BFS, were remarkably changed by microwave heating. The porosity, surface roughness and specific surface area of modified particle surface all increased obviously. Combining with fractal meth-od called Sierpinski model, the fractal dimensions of sinter, coke and others increased from 2.35, 2.24 and 2.58 to 2.65, 2.44 and 2.61 respectively, after modification by microwave heating. The results predicted that the reaction mechanism of microwave heating for BFS is related to two aspects. Different mineral phases existed in BFS particles incline to dissociate each other due to their different microwave absorbability~ some recombination or reconstruction of matters or structure leads to structure defects, which have great influences on the surface morphology characteris-tics and chemical properties. The research indicated that fractal dimension can be used as an effective factor for quan-titative analysis of the pore changes in morphology of the sludge. Furthermore, it is helpful for separation and ex- traction of valuable constituent from BFS.
