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Analysis of Gas Thermodynamic Utilization and Reaction Kinetic Mechanism in Shaft Furnace 被引量:3
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作者 Zhao-cai WANG Zheng-gen LIU +2 位作者 Jue TANG Man-sheng CHU Xiang-xin XUE 《Journal of Iron and Steel Research(International)》 SCIE EI CAS CSCD 2014年第1期16-23,共8页
The technology of coal gasification in shaft furnace is an effective way to develop direct reduction iron in China. In order to clarify the process of the reduction of oxidized pellets in shaft furnace by carbon monox... The technology of coal gasification in shaft furnace is an effective way to develop direct reduction iron in China. In order to clarify the process of the reduction of oxidized pellets in shaft furnace by carbon monoxide or hydrogen in two ways, i.e. thermodynamics and kinetics, the gas utilization and reaction mechanism were studied by theoretical computations and isothermal thermogravimetric experiment. The results showed that the gas utilization increased with the rise of temperature when xH2/xco≥1 and with the increase of xco/(xH2 +xco) when temperature is less than 1073 K. The water-gas shift reaction restrains efficient utilization of gas, particularly in high tem- perature and hydrogen-rich gas. The gas utilization dropped with increase of carburization quantity of direct reduction iron (DRI) and oxygen potential of atmosphere. With the increase of both temperature and content of H2 in inlet gas, the reaction rate increased. At 100% Hz atmosphere, the interfacial chemical reaction is the dominant reaction re- stricted step. For the H2-CO mixture atmosphere, the reduction process is controlled by both interfacial chemical reaction and internal diffusion 展开更多
关键词 gas utilization oxidized pellet shaft furnace direct reduction KINETICS
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CLEAN PRODUCTION AND SMELTING REDUCTION TECHNOLOGY
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作者 Wang Lixin, Xu Zhihong and Yang Zhangyuan (Laboratory of Computer Chemistry (LCC), Institute of Chemical Metallurgy, Chineses Academy of Sciences, Beijing 100080) 《化工学报》 EI CAS CSCD 北大核心 2000年第S1期159-162,共4页
Clean Production is the best method for iron-steel making industry to eliminate pollution thoroughly. In order to achieve this object, smelting reduction technology should play the key role. Furthermore, process integ... Clean Production is the best method for iron-steel making industry to eliminate pollution thoroughly. In order to achieve this object, smelting reduction technology should play the key role. Furthermore, process integration method can be used to solve the problem of residual gas utilization by integrating smelting reduction process with direct reduced iron unit, gasoline, methanol or dimethyl ether synthesis unit, etc. A new smelting reduction process has been proposed which can be constructed on the present plant site. Since this process can directly treat the lump coal and iron ore fines, it reduces st6ps necessary in traditional blast furnace process and Corex smelting reduction process. 展开更多
关键词 Clean production Smelting reduction Process integration Multi-layer fluidized moving bed Coal gas utilization Blast furnace
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Recognition of Blast Furnace Gas Flow Center Distribution Based on Infrared Image Processing 被引量:5
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作者 Lin SHI You-bin WEN +1 位作者 Guang-sheng ZHAO Tao YU 《Journal of Iron and Steel Research(International)》 SCIE EI CAS CSCD 2016年第3期203-209,共7页
To address the problems about the difficulty in accurate recognition of distribution features of gas flow center at blast furnace throat and determine the relationship between gas flow center distribution and gas util... To address the problems about the difficulty in accurate recognition of distribution features of gas flow center at blast furnace throat and determine the relationship between gas flow center distribution and gas utilization rate,a method for recognizing distribution features of blast furnace gas flow center was proposed based on infrared image processing,and distribution features of blast furnace gas flow center and corresponding gas utilization rates were categorized by using fuzzy C-means clustering and statistical methods.A concept of gas flow center offset was introduced.The results showed that,when the percentage of gas flow center without offset exceeded 85%,the average blast furnace gas utilization rate was as high as 41%;when the percentage of gas flow center without offset exceeded50%,the gas utilization rate was primarily the center gas utilization rate,and exhibited a positive correlation with no center offset degree;when the percentage of gas flow center without offset was below 50% but the sum of the percentage of gas flow center without offset and that of gas flow center with small offset exceeded 86%,the gas utilization rate depended on both the center and the edges,and was primarily the edge gas utilization rate.The method proposed was able to accurately and effectively recognize gas flow center distribution state and the relationship between it and gas utilization rate,providing evidence in favor of on-line blast furnace control. 展开更多
关键词 infrared image processing gas flow center recognition gas utilization rate fuzzy C-means clustering
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