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Simulation and analysis of O_(2)-CaO jet behavior with different shrouding fuel mediums in electric arc furnace steelmaking

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Journal of Iron and Steel Research International 2020年第11期27卷 1259-1269页

作者： Bing-long Zhang Guang-sheng Wei Run-zao Liu Rong Zhu Rong-fang Su School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China Beijing Key Laboratory of Special Melting and Preparation of High-End Metal Materials Beijing 100083China Beijing Rongcheng Jingye Technology Co. Ltd.Beijing 100083China

The O_(2)-CaO jet with shrouding combustion flame demonstrates some advantages in quick melting and effective slag foaming by delivering lime powder deeply into the molten *** the discrete particle model and the eddy dissipation concept model with the detailed chemical kinetic mechanisms(GRI-Mech 3.0),computational fluid dynamics models of the O_(2)-CaO jet with different shrouding fuel mediums injection were ***,the results of the numerical simulation were validated by the measured data of cold test for O_(2)-CaO ***,the interaction between the particles and the gas jet of the O_(2)-CaO jet and the effect of shrouding fuel medium species on the fluid flow characteristics of the O_(2)-CaO jet were *** show that the CaO particles can be effectively heated by the shrouding high-temperature combustion flame and compared with the O_(2)-CaO jet without shrouding gas,the potential core length was increased about 2.5,3.3 and 4.3 times by the shrouding flame generated from CO,CH_(4) and C_(3)H_(8).And with shrouding CH_(4) and C_(3)H_(8) injection,the CaO particles can be clustered together in a long distance,which would be helpful to improve the utilization efficiency of CaO particles.

关键词： O_(2)-CaO jet Shrouding fuel medium electric arc furnace steelmaking Numerical simulation Cold test CaO particle

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A review on bath fluid flow stirring technologies in EAF steelmaking

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Journal of Iron and Steel Research International 2021年第11期28卷 1341-1351页

作者： Ling-zhi Yang Hang Hu Ze-shi Yang Bo-tao Xue Yu-feng Guo Shuai Wang School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083HunanChina Department of Mechanical Engineering National University of SingaporeSingapore 117575Singapore

In the contemporary electric arc furnace(EAF)steelmaking industry,increasing contents and temperature homogenization via fluid flow stirring is found to be an effective method of improving production quality and smelting *** is a trend for different factories with bowl-shaped furnaces to apply the bath fluidity enhancement *** has plenty of advantages in modern steelmaking industry,and the improvements on the EAF steelmaking process have come up with two major tasks,namely reduction in energy consumption and tap-to-tap *** latter task requires an essential understanding of every phase in EAF steelmaking *** flat bath phase with poor bath fluid flow was crucial to the product quality and metallurgical efficiency considering EAF’s bowl-shaped *** research of three stirring bath methods,oxygen jets injection,electromagnetic stirring,and bottom blowing,were introduced,and then the detailed parameters of each method with their influences on molten bath fluidity were presented.

关键词： electric arc furnace steelmaking Bath fluid flow Stirring technology Oxygen jets injection Electromagnetic stirring Bottom blowing

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