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| 1 | Cold Model Study on Mg Desulfurization of Hot Metal Under Mechanical Stirring显示文摘The new method of in-situ desulfurization with mechanical stirring of new type impellers was introduced,in which the bubble′s dispersion and disintegration of magnesium vapor were the key to boosting the desulfurization efficiency and increasing the utilization rate of magnesium.Effects of different new type of impellers on bubble dispersion and disintegration were studied through bubble image analysis,gas-liquid mass transfer,and power consumption levels of different impeller structures.The results showed that the sloped swept-back blade impeller-2produces optimal bubble′s dispersion and disintegration,as well as higher volumetric mass transfer coefficient and CO2gas utilization while consuming the least power.Numerical simulation result with Fluent software also showed that the sloped swept-back blade impeller-2has higher turbulent kinetic energy and better velocity distribution than the other two impellers. | LIU Yan ZHANG Zi-mu LIU Jian-nan ZHANG Jun-hua Masamichi Sano ZHANG Jun | 2013 | Journal of Iron and Steel Research(International)2013，20，12： | 5 |
| 2 | Study on Absorption Rate by Eccentric Mechanical Stirring in Gas Injection Refining for Iron and Steel Making显示文摘In gas injection refining processes, a great amount of gas is injected into molten metal in short time, so that very large bubbles are inevitably formed. Wide dispersion of small bubbles in the bath is indispensable for high refining efficiency. Eccentric mechanical stirring with unidirectional impeller rotation was tested using a water model for pursuing better bubble disintegration and dispersion. Absorption rate are used to research on the influence law of the bubble dispersion and disintegration and gas-liquid absorption by the influence of, rotation mode, rotation speed and gas flow rate. Compared to the experimental results of absorption rate under eccentric stirring and centric stirring ,provide the scientific experimental and theoretical guidance for high-temperature experiment of hot metal desulfurization .According to experimental and theoretical analysis, this paper has studied various factors effecting on gas absorption process and volumetric mass transfer coefficient using the system of CO2-NaOH-H2O.The results show that:the volumetric mass transfer coefficient and absorption efficiency of CO2 can be increased under eccentric stirring mode, Because bubble disperse quickly with eccentric mechanical stirring, which results in promoting complete reaction between CO2 and NaOH, and improving the mass transfer coefficient and absorption. Volumetric mass transfer coefficient and efficiency of CO2 increase with the increasing rotation speed under the condition of eccentric stirring .But volumetric mass transfer coefficient and efficiency of CO2 decrease with the increasing rotation speed under the condition of centric stirring. | MASAMICHI Sano | 2011 | Journal of Iron and Steel Research(International)2011，18，S2： | 5 |
| 3 | Improvement of Impeller Blade Structure for Gas Injection Refining under Mechanical Sirring显示文摘The impeller blade structure for gas injection refining under mechanical stirring has been explored by water model experiments.A sloped swept-back blade impeller is proposed for the purpose.The central part of the impeller is disk-or plate-shaped,and the blades are fitted to the side of the disk or plate.In addition,a disk is put on the top side of the impeller blades.The impeller can strengthen the radial and downward flow between the blades and weaken the swirl flow in the zone above the impeller.These effects on flow phenomena are favorable for disintegration and wide dispersion of bubbles which are injected from a nozzle attached to the center of the underside of the impeller.In addition,the sloped swept-back impeller requires less power consumption.The impeller shaft should be placed away from the vessel center so as to disperse the injected bubbles widely in the bath under mechanical stirring even with unidirectional impeller rotation and without installing baffles.The number of gas holes in the nozzle and the direction of gas injection have a little effect on the bubble disintegration and dispersion in the bath.Highly efficient gas injection refining can be established under the conditions of proper impeller size,larger nozzle immersion depth,larger eccentricity and rotation speed of the impeller.The sloped swept-back blade impeller can decrease the power consumption and yet improve the bubble disintegration and wide dispersion in the bath. | Yan LIU Zi-mu ZHANG Sano MASAMICHI Jun ZHANG Pin SHAO Ting-an ZHANG | 2014 | Journal of Iron and Steel Research(International)2014，21，2： | 3 |
| 4 | Experimental Research of External Desulfurization in Situ Mechanical Stirring显示文摘This paper presents a new idea about desulfurization with in-situ mechanical stirring method on the basis of desulfurization by single blow grain magnesium and KR method, that is, the inner gases carry the magnesium vapor formed in-site in molten iron by magnesium-based desulfurization, and bubble dispersed and disintegrated under the condition of mechanical stirring, thence to improve the efficiency of desulfurization by single blow grain magnesium .It has been proved by research of cold water model experiment that the bubble dispersion and disintegration can not only improve the desulphurization efficiency but also increase the utilization rate of magnesium. Obviously, the bubble dispersion and disintegration of magnesium vapor is the key problem in improving the desulphurization efficiency and increasing the utilization rate of magnesium. Thus the research focus on exploring the performance of bubble dispersion and disintegration on the base of refining process and gas-liquid mass transfer. According to the literature and cold water model experimental result basing on principle of similitude, the influencing factors and interaction of bubble dispersion and disintegration have been studied from the perspectives of physical and numerical simulation. The study would provide the theoretical and experimental data for the new method of desulfurization with in-situ mechanical stirring. | MASAMICHI Sano | 2011 | Journal of Iron and Steel Research(International)2011，18，S2： | 2 |
| 5 | Kinetics of phosphorus between iron oxide containing slag and high carbon concentration of molten iron under Ar- Oz atmosphere transfer 显示文摘 | Pan WEI Masamichi SANO Masahiro HIRASAWA | 1993 | ISIJ International1993，33，4： | 1 |
| 6 | De-oxida- tion ofmolten copper with a rotating graphite cylinder显示文摘 | Masaki Miyata Masamichi Sano Masahiro Hirasawa | 1998 | Metallur- gical and Materials Transactions B1998，29，4： | 1 |
| 7 | Kinetics of reduc- tion of magnesia with carbon显示文摘 | Li Rongti Pan Wei Masamichi Sano | 2002 | Thermochim Acta2002，390，： | 1 |
| 8 | Kinetics and mecha- nism of carbothermic reduction of magnesia显示文摘 | Li Rongti Pan Wei Masamichi Sano | 2003 | Metall Ma- ter Trans B2003，34，： | 1 |
| 9 | Catalytic reduc- tion of magnesia by carbon显示文摘 | Li Rongti Pan Wei Masamichi Sano | 2003 | Thermochim Acta2003，398，： | 1 |
| 10 | Kinetics of carbothermic reduction of magnesia and zinc oxide by ther- mogravirnetric analysis technique显示文摘 | Lan Hong Hong Yong Sohn Masamichi Sano | 2003 | Scandinavian J Metall2003，32，： | 1 |
| 11 | Fluid flow and mix ing characteristics in a gas-stirred molten metal bath显示文摘 | Masamichi SANO and Kazumi MORI | 1983 | Transactions ISIJ1983，23，： | 1 |
| 12 | Kinetics and mechanism of carbothermic reduction of magnesia显示文摘 | Rongti Li Wei Pan and Sano Masamichi | 2003 | Metallurgical and Materials Transactions B2003，34，4： | 1 |
| 13 | Kinetics of reduction of magnesia with carbon显示文摘 | Rongti Li Wei Pan Sano Masamichi | 2002 | Thennochimica Acta2002，390，12： | 1 |
| 14 | Bubble behavior in cylindrical and square vessels under centric mechanical stirring显示文摘Water model experiments were carried out to investigate the bubble behavior in cylindrical and square vessels under centric mechanical stirring.The bubble behavior in the square vessel was investigated in detail by using a high-speed camera to record the transient images of the bubbles.An image analysis software was used to obtain the bubble diameter.The results showed that the centric mechanical stirring in the square vessel was suitable for breakage and dispersion of bubbles,but not suitable for that in the cylindrical vessel.Increasing the impeller blade length and impeller rotation speed was beneficial to disintegrate and disperse bubbles widely.The bubble diameter decreased with the increase in the Weber number and increased slightly with the increase in the modified Froude number.The dimensionless correlation equation of bubble diameter was obtained by the dimensional analysis method. | Kun Wang Yan Liu Masamichi Sano Ting-an Zhang | 2021 | Journal of Iron and Steel Research(International)2021，28，10： | 1 |
| 15 | Kinetics of Carbothermic Reduction of Magnesia and Zinc Oxide by Thermo Gravimetric Analysis Technique显示文摘 | Hong Yong Sohn Masamichi Sano | 2003 | Scandinavian Journal of Metallurgy2003，32，： | 1 |
| 16 | Kinetics of Carbothermic Reduction of Magnesia and Zinc OXide by Thermogravimetrie Analysis Technique显示文摘 | Lan Hong Hong Yong Sohn Masamichi Sano | 2003 | Scandina- vian Journal of Metallurgy2003，32，： | 1 |
| 17 | Kinetics and mechanism of carbothermic reduction of magnesia显示文摘 | Li Rongti Pan Wei Masamichi Sano | 2003 | Metallurgical and Materials Transactions B2003，，4： | 1 |
| 18 | Kinetics of phosphorus transfer between iron oxide containing slag and molten iron of high carbon concentration under Ar-O_, atmosphere 显示文摘 | Pan Wei Masamichi Sano | 1993 | ISIJ International1993，33，4： | 1 |
| 19 | Kinetics and Mechanism of Carbothemnic Reduction of Magnesia显示文摘 | LI RONGTI PAN WEI MASAMICHI SANO | | 0，，08： | 1 |
| 20 | Flow fields control for bubble refinement induced by electromagnetic fields显示文摘Large bubbles seriously reduce the efficiencies of the interactions between the bubbles and the molten steel,such as energy transfer,momentum transfer,mass transfer and chemical reaction.To reduce the size of the bubbles and increase the gas–liquid interface area,a novel non-intrusive method of bubble refinement was proposed,which only depends on the molten steel flow field controlled by the rotating electromagnetic field.The flow fields of the molten steel for bubble refinement were analyzed,and the corresponding bubble refinement was investigated.It was found that the molten steel formed obvious rotating turbulent flow for bubble refinement under the unidirectional rotating electromagnetic field.However,the large vortex in the center of the molten pool caused by the rotating flow made the bubbles aggregate and coalesce again,resulting in formation of larger bubbles and gas cavity.To suppress the central vortex formation and enhance the bubble refinement,the forward-reverse rotating electromagnetic field for bubble refinement was proposed.The irregular and chaotic flow occurred repeatedly because of alternating forward and reverse rotating in a short period,so that the turbulent kinetic energy and turbulent dissipation of the flow field always remained at a high level which favors bubble refinement.As a result,the bubble diameter can decrease by more than 50%compared to that without electromagnetic field.Furthermore,it is important that this non-intrusive kind of bubble refinement method completely avoids the introduction of non-metallic inclusions caused by intrusive configuration. | Lian-yu Wang Ze-yi Liu Ming He Xiao-ming Liu Masamichi Sano Li-jia Zhao Qiang Wang | 2022 | Journal of Iron and Steel Research(International)2022，29，4： | 0 |
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