Search Results:　 1-20 of 989

  • 1

    Agenda for Low Reducing Agent Operation of Blast Furnace : Reduction and Melting Phenomena of Iron Ore  [in Japanese]

    植田 滋 , 三木 貴博 , 村上 太一 他

    ふぇらむ = Bulletin of the Iron and Steel Institute of Japan : (一社)日本鉄鋼協会会報 18(1), 1-11, 2013-00-00

  • 2

    Functional Assessment of Waste Molten Slag as a Water Preservative  [in Japanese]

    NAKAMURA Ryuta , KIJIMA Saku , KIYOYAMA Shiro , TOKURAKU Kiyotaka

    本研究では，近年の廃棄物溶融炉の増加に伴い排出量が増大しつつある廃棄物溶融スラグ (以下スラグと略記) の新規活用法を検討した。はじめに，スラグの微生物増殖に与える影響を調査した。大腸菌に対しては，振盪培養条件下でのスラグの添加は増殖に有意な影響を与えなかったが，静置培養条件下においては約80%の増殖抑制効果が観察された。同様に，魚飼育水槽由来の水生微生物に対しても静置培養条件下で増殖が約80%が …

    Journal of the Japan Society of Material Cycles and Waste Management 23(1), 25-32, 2012-01-31

    J-STAGE CrossRef References (14)

  • 3

    Influence of Li_2O on the Viscous Behavior of CaO-Al_2O_3-12 mass% Na_2O-12 mass% CaF_2 Based Slags

    KIM Gi Hyun , SOHN II

    … The viscous behavior of the CaO–Al2O3–12 mass%Na2O–12 mass%CaF2 based slag system with various concentrations of Li2O has been studied using the rotating spindle method to understand the effects on the viscosity with these additives. … Li2O additions up to 1 mass% significantly lowered the viscosity by breaking the [AlO4]-tetrahedral network structure of molten fluxes, but Li2O concentrations above this level was comparatively less effective in lowering the viscosity. …

    ISIJ International 52(1), 68-73, 2012-01-15

    J-STAGE CrossRef References (13)

  • 4

    Influence of Solid CaO and Liquid Slag on Hot Metal Desulfurization

    TAKAHASHI Koichi , UTAGAWA Keita , SHIBATA Hiroyuki , KITAMURA Shin-ya , KIKUCHI Naoki , KISHIMOTO Yasushi

    … In this process, solid lime is added as flux and emulsified into molten iron using a vortex formed by the stirrer. … However, in addition to the added solid lime, the liquid top slag on the ladle is emulsified and forms granules. …

    ISIJ International 52(1), 10-17, 2012-01-15

    J-STAGE CrossRef References (7)

  • 5

    Simulation of Multi-electrode ESR Process for Manufacturing Large Ingot

    Dong Yanwu , Jiang Zhouhua , Liu Hui , Chen Rui , Song Zhaowei

    … The impact of slag depth, electrodes immersion depth and filling ratio on the molten pool depth has been analyzed. … The molten pool is shallower for four electrodes than conventional single electrode mode, which is in favor of improving large ingot quality. … The larger slag pool depth is the shallower the molten pool is. …

    ISIJ International 52(12), 2226-2234, 2012

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  • 6

    Pig Iron Making by Focused Microwave Beams with 20 kW at 2.45 GHz

    Hara Kyosuke , Hayashi Miyuki , Sato Motoyasu , Nagata Kazuhiro

    … The energy efficiency was 60% for heating resources and the reduction of magnetite to wustite and 15% for the reduction of wustite to iron and molten pig iron. … The sulfur content in pig iron was a little higher than blast furnace pig iron because of little slag. …

    ISIJ International 52(12), 2149-2157, 2012

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  • 7

    Volatilization Behaviors of Lead from CaO-SiO2-Al2O3 Molten Slag in an N2-H2S Atmosphere  [in Japanese]

    Kageyama Hiroki , Osada Shohichi , Kubota Mitsuhiro , Matsuda Hitoki

    … The rate of volatilization of a lead compound from CaO-SiO2-Al2O3 molten slag was measured in an N2-H2S atmosphere at temperatures of 1673-1773K. … The composition of the slag sample was adjusted to CaO 20-30wt%, SiO2 30-60wt% and Al2O3 20-40wt% with an initial PbO content of 2000mg · kg<SUP>－1</SUP>, which simulated molten slag from the gasification-melting of MSW. …

    Journal of the Japan Society of Material Cycles and Waste Management, 2012

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  • 8

    Numerical Simulation of Heat Transfer Phenomenon in Steel Making Ladle

    Tripathi Anurag , Saha Jayanta Kumar , Singh Jitendra Bhadur , Ajmani Satish Kumar

    … The control of molten steel temperature is one of the important parameters for producing the superior quality of steel. … A computational fluid dynamics (CFD) based mathematical model was developed for temperature prediction of ladles and molten steel. … The effect of various parameters on temperature drop of molten steel was studied. … The results obtained show low impact of slag thickness, tapping temperature and ladle life. …

    ISIJ International 52(9), 1591-1600, 2012

    J-STAGE CrossRef

  • 9

    Nano-structure of Carbons Deposited from CH4 Blowing to and Injecting into Molten Slag

    Kashiwaya Yoshiaki , Watanabe Masami

    … CH4(g) = C(s)+ 2H2(g) However, the decomposition reaction on the surface of molten slag was not studied. … Authors have studied the kinetics of decomposition reaction of CH4 on the surface of the molten slag in the previous study. … The rate constant at 1700 K for the surface of the molten slag was about four times larger than that of graphite surface. …

    ISIJ International 52(8), 1404-1408, 2012

    J-STAGE CrossRef

  • 10

    Kinetic Analysis of the Decomposition Reaction of CH4 Injecting into Molten Slag

    Kashiwaya Yoshiaki , Watanabe Masami

    … Utilization of heat of slag is key technology for the reduction of CO2 emission in steel industries. …

    ISIJ International 52(8), 1394-1403, 2012

    J-STAGE CrossRef

  • 11

    Modelling Viscosities of CaO–MgO–Al2O3–SiO2 Molten Slags

    Zhang Guo-Hua , Chou Kuo-Chih , Mills Ken

    … The model represents the slag structure through the different types of oxygen ions formed in the melt. …

    ISIJ International 52(3), 355-362, 2012

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  • 12

    Sulfide Capacity of CaO–SiO2–MnO–Al2O3–MgO Slags at 1873 K

    Park Joo Hyun , Park Geun-Ho

    … The sulfide capacities of the CaO–SiO2–MnO–Al2O3–5 mass% MgO slags were measured at 1873 K over a wide composition range using a gas–slag equilibration method. … The effects of basicity and the activity coefficient of sulfide on the sulfide capacity of molten slag were also investigated based on the structural view of silicate melts. …

    ISIJ International 52(5), 764-769, 2012

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  • 13

    Influence of B2O3 on Viscosity of High Ti-bearing Blast Furnace Slag

    Ren Shan , Zhang Jianliang , Wu Liushun , Liu Weijian , Bai Yanan , Xing Xiangdong , Su Buxin , Kong Dewen

    … The influence of B2O3 on the viscosity of high Ti-bearing BF slag is studied under Ar atmosphere from 1773 K (1500°C) to about 1593 K (1320°C). … The results show that the addition of B2O3 can decrease the viscosity of high Ti-bearing BF Slag containing UPC, consequently improve its fluidity. … At a lower temperature, B2O3 was easy to form a eutectic and decreased the viscosity of molten slag. …

    ISIJ International 52(6), 984-991, 2012

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  • 14

    Effect of CaO on Dephosphorising Ability of Deoxidation Slag for Effective Utilisation of Phosphorus in Steel

    Kobayashi Yoshinao , Kodama Shinji

    … Recent proposal of utilisation of impurities in steel requires preservation of phosphorus in molten steel during its refining process. … To know the phosphorus absorbing ability of deoxidation by-product slag having CaO, the phosphorus partition has been investigated between the MnO–SiO2–FetO–CaO–MgO–P2O5 slag and molten iron in this study. …

    ISIJ International 52(6), 960-966, 2012

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  • 15

    Influence of Bottom Bubbling Rate on Formation of Metal Emulsion in Al–Cu Alloy and Molten Salt System

    Song Duk-Yong , Maruoka Nobuhiro , Gupta Govind Sharan , Shibata Hiroyuki , Kitamura Shin-ya , Sasaki Naoto , Ogawa Yuji , Matsuo Michitaka

    … In steel refining process, an increase of interfacial area between the metal and slag through the metal droplets emulsified into the slag, so-called "metal emulsion", is one prevailing view for improving the reaction rate. … The formation of metal emulsion was experimentally evaluated using Al–Cu alloy as metal phase and chloride salt as slag phase under the bottom bubbling condition. …

    ISIJ International 52(6), 1018-1025, 2012

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  • 16

    Volatilization Behaviors of Lead Compounds from CaO-SiO_2-Al_2O_3 Molten Slag in N_2-HCl Atmosphere  [in Japanese]

    KAWACHIYAMA Takuya , KAGEYAMA Hiroki , OSADA Shohichi , KUBOTA Mitsuhiro , MATSUDA Hitoki

    N<SUB>2</SUB>-HCl雰囲気におけるCaO-SiO<SUB>2</SUB>-Al<SUB>2</SUB>O<SUB>3</SUB>溶融スラグからの鉛化合物の揮発挙動を実験室規模の加熱装置を用いて，N<SUB>2</SUB>-HCl混合ガス流量5×10<SUP&g …

    Journal of the Japan Society of Material Cycles and Waste Management 22(6), 354-360, 2011-11-30

    J-STAGE CrossRef References (18)

  • 17

    Suppression of Hexavalent Chromium Elution by High Temperature Treatment of Sewage Sludge Incineration Ash under Oxidative Conditions  [in Japanese]

    SAKAI Yoshihiro , YABE Yukihiko , TAKAHASHI Masamitsu , IIZUKA Atsushi , SHIBATA Etsuro , NAKAMURA Takashi

    Journal of MMIJ : Journal of the Mining and Materials Processing Institute of Japan 127(12), 714-718, 2011-11-25

    References (11)

  • 18

    Direct Production of Ti-Fe Alloy in Liquid by Electrowinning in Molten Slag

    TAKENAKA Toshihide , MATSUO Hidetaka , KAWAKAMI Masahiro

    … Aiming at the direct production of Ti–Fe alloy, its direct electrowinning has been attempted in a CaF2–CaO–TiO2–FeO bath by using a direct-current electro-slag remelting unit. … The experiments were carried out in the slag where the molar ratio of CaO to TiO2 was fixed as 1.5, and the influence of the molar ratio of FeO to TiO2 was mainly investigated. …

    ISIJ International 51(11), 1762-1765, 2011-11-15

    J-STAGE CrossRef References (8)

  • 19

    No.18 Development of combustion technology for low-rank coals in pulverized coal-fired boiler  [in Japanese]

    PAK Haeyang , AKIYAMA Katsuya , TAKUBO Yoji , TADA Toshiya , UEKI Yasuaki , YOSHIIE Ryo , NARUSE Ichiro

    … It was confirmed that the deposition fraction of ash obtained by the experiment rapidly increased when the molten slag fraction obtained by the calculation became over 60%. …

    石炭科学会議発表論文集 (48), 36-37, 2011-10-27

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  • 20

    Ruthenium Solubility and Dissolution Behavior in Molten Slag

    SHUTO Hiroshi , KABE Toru H. , MORITA Kazuki

    Materials Transactions 52(10), 1899-1904, 2011-10-01

    References (16)