Change search
Refine search result
12 51 - 70 of 70
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Rows per page
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sort
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
Select
The maximal number of hits you can export is 250. When you want to export more records please use the Create feeds function.
  • 51. Nurni, Viswanathan
    et al.
    Fatemeh, Shahbazian
    Division of Theoretical Metallurgy, Department of Metallurgy, Royal Institute of Technology.
    Sichen, Du U
    Division of Theoretical Metallurgy, Department of Metallurgy, Royal Institute of Technology.
    Seetharaman, Seshadri
    Division of Theoretical Metallurgy, Department of Metallurgy, Royal Institute of Technology.
    Estimation of escape rate of volatile components from slags containing CaF2 during viscosity measurement1999In: Steel Research International, ISSN 1611-3683, E-ISSN 1869-344X, Vol. 70, no 2, p. 53-58Article in journal (Refereed)
    Abstract [en]

    In continuous casting process, the viscosity of the mould powder/flux has direct impact on the size of the gap between the mould wall and the solidified shell, which in turn affect the heat transfer characteristics between the metal and the mould. Numerous experiments have been conducted to determine the viscosity of various mould powders using rotation cylinder method. The pre-melting of the mould powder as well as the viscosity measurement are carried out in a cylindrical crucible placed in a tubular furnace with constant argon flow to maintain inert atmosphere. One of the main difficulties encountered during viscosity measurement is the liberation of volatile fluorides, which in turn changes the flux composition, and consequently the viscosity of the flux. Thermodynamic calculations have shown that SiF4 and HF are major constituents of the volatile matter. Present study aims to estimate the liberation rate of SiF4 and HF from flux samples during viscosity measurement by computing the detailed gas flow pattern inside the tubular furnace. The gas flow pattern is computed by solving momentum and continuity of equations. Further, the effect of argon gas flow rate and slag level in the crucible on liberation rate has been studied to arrive at proper experimental conditions during viscosity measurement.

  • 52. Nurni, Viswanathan
    et al.
    ji, F.Z.
    Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology, Bombay.
    Sichen, Du U.
    Royal Institute of Technology, Division of Materials Process Science, Stockholm.
    Seetharaman, Seshadri
    Royal Institute of Technology, Division of Materials Process Science, Stockholm.
    Viscosity measurements on some fayalite slags2001In: ISIJ International, ISSN 0915-1559, E-ISSN 1347-5460, Vol. 41, no 7, p. 722-727Article in journal (Refereed)
    Abstract [en]

    In the present study, viscosity measurements on Fe-O-Si slags have been carried out using rotating cylinder method. The slag samples for viscosity measurement were prepared by pre-melting appropriate stoichiometric amounts of Fe, Fe2O3 and SiO2 in an iron crucible under argon atmosphere, which ensured that Fe ions in the slag were predominantly in the valence state of +2. The viscosities of the pre-melted slag samples were measured in iron as well as nickel crucibles under argon atmosphere at different temperatures. The measured viscosity values obtained in the two kinds of crucibles were found to be in good agreement, indicating thereby that nickel crucibles can be successfully used for viscosity measurements. In order to investigate the effect of oxidation of Fe2+ to Fe3+, the binary FenO-SiO2 slag was kept in a nickel crucible under oxidising conditions using a CO/CO2 atmosphere and viscosity measurements were carr ied out dynamically as a function of time at 1 623 and 1 673 K. With time, Fe3+ concentration in the slag increased and hence the viscosity changed progressively. The rate controlling step for the oxidation reaction was considered to be the mass transfer of CO2 in the gas stream to the slag-gas interface. A simple kinetic analysis was used to predict the concentration of Fe3+ in the slag with time. The measured viscosity with time indicated that the viscosity remains almost the same during initial period of oxidation. The viscosity raises sharply when the Fe3+ concentration in the slag, calculated as F2O3 reached around 7 mass%.

  • 53. Nurni, Viswanathan
    et al.
    Lahiri, A.K.
    Modelling strategy for counter current shaft reactor design1997Conference paper (Refereed)
  • 54. Nurni, Viswanathan
    et al.
    Lahiri, A.K
    Srinivasan, M.N.
    A 3-D methematical model of cupola1995Conference paper (Refereed)
  • 55. Nurni, Viswanathan
    et al.
    Lahiri, A.K.
    Srinivasan, M.N.
    Modelling of solid flow in shaft furnace1995Conference paper (Refereed)
  • 56. Nurni, Viswanathan
    et al.
    Lahiri, Ashok Kumar
    Department of Metallurgy, Centre for Advanced Study, Bangalore.
    Srinivasan, Mandayam Nayachavadi
    Department of Mechanical Engineering, Indian Institute of Science, Bangalore.
    Post combustion in cupola for pollution control1997In: Transactions of the American Foundrymen's Society and the proceedings of the one hundred first annual meeting: April 20 - 23, 1997 ; [101st Casting Congress, Seattle, Washington], Des Plaines, Ill: AFS, American Foundrymen's Society, , 1997, p. 685-Conference paper (Refereed)
    Abstract [en]

    Carbon monoxide, a major pollutant from the cupola, is poisonous and flammable. It can vary from 12 to 25% in cupola emissions. Carbon monoxide content in cupola emissions can be reduced by the post-combustion air input at the appropriate level into the stack. Scientific support to this has been provided by simulation of the combustion process in the cupola. Location and the extent of input of air for post combustion into the stack have been determined

  • 57. Nurni, Viswanathan
    et al.
    Lahiri, Ashok Kumar
    Department of Metallurgy, Centre for Advanced Study, Bangalore.
    Srinivasan, Mandayam Nayachavadi
    Department of Mechanical Engineering, Indian Institute of Science, Bangalore.
    Scientific rationale toward cupola design1997In: Transactions of the American Foundrymen's Society and the proceedings of the one hundred first annual meeting: April 20 - 23, 1997 ; [101st Casting Congress, Seattle, Washington], Des Plaines, Ill: AFS, American Foundrymen's Society, , 1997, p. 665-Conference paper (Refereed)
    Abstract [en]

    Numerous improvements in cupola design and operation have been made in the past to increase productivity, spout temperature and fuel efficiency. However, these improvements have been based on practice and experience. The present work establishes a scientific rationale for cupola design and operation using a mathematical model. The improved performance of a divided-blast cupola over the conventional one has been successfully explained by the model. Performance of a cupola, as influenced by the important design parameter--the distance of separation between the two rows of tuyeres and operational parameters, such as size of coke and metallic charge, blast rate and charge level--was analyzed. For a divided-blast cupola, an optimum distance of 800-900 mm separation between the two rows of tuyeres was found to be ideal, irrespective of the size of cupola

  • 58. Nurni, Viswanathan
    et al.
    Sridhar, Seetharaman
    Department of Materials Science and Engineering, Carnigie Mellon University, Pittsburgh.
    Mills, K.C.
    Department of Materials, Imperial College of Science, Technology and Medicine, London.
    Sichen, Du U.
    Department of Metallurgy, Royal Institute of Technology, Stockholm.
    Mathematical model to simulate the temperature and composition distribution inside the flux layer of a continuous casting mould2002In: Scandinavian journal of metallurgy, ISSN 0371-0459, E-ISSN 1600-0692, Vol. 31, no 3, p. 191-200Article in journal (Refereed)
    Abstract [en]

    A model is presented to predict the mass transport and heat transfer in a continuous casting mould flux bed. Physically consistent micromodels for carbon burning, evaporation of volatiles and thermophysical properties in the mould flux layer have been combined with a one-dimensional finite-difference model of the continuous casting mould flux bed. The sensitivity of the model to bed height, flux consumption rate, carbon burning and powder particle size is investigated for a mould flux composition corresponding to an industrial casting powder.

  • 59. Nurni, Viswanathan
    et al.
    Srinivasan, Mandayam Nayachavadi
    Department of Mechanical Engineering, Indian Institute of Science, Bangalore.
    Lahiri, Ashok Kumar
    Department of Metallurgy, Indian Institute of Science, Bangalore.
    Mathematical modelling of divided blast cupola1997In: Steel Research International, ISSN 1611-3683, E-ISSN 1869-344X, Vol. 68, no 5, p. 192-197Article in journal (Refereed)
    Abstract [en]

    A pseudo 2-D mathematical model has been developed to simulate a cupola with one row and two rows of tuyère. The simulation results predicted higher spout temperature and combustion ratio for cupola with two rows of tuyère compared to that with one row. Further, the model has been used to study the effect of the distance of separation between the two rows of tuyère on cupola performance. The computed results shows that the spout temperature increases with tuyère level separation and attains the maximum at an optimum distance of separation between two rows of tuyère. Above the optimum, the spout temperature starts decreasing. The exit gas temperature and combustion ratio increases monotonously with the increase in tuyère level separation. These results agree well with the reported experimental observations. The mechanism behind the improved cupola performance with two rows of tuyère has been deduced from the computed temperature and composition profiles inside the cupola

  • 60. Nurni, Viswanathan
    et al.
    Srinivasan, Mandayam Nayachavadi
    Department of Mechanical Engineering, Indian Institute of Science, Bangalore.
    Lahiri, Ashok Kumar
    Department of Metallurgy, Indian Institute of Science, Bangalore.
    Process simulation of cupola1998In: ISIJ International, ISSN 0915-1559, E-ISSN 1347-5460, Vol. 38, no 10, p. 1062-1068Article in journal (Refereed)
    Abstract [en]

    Cupola is a counter current shaft reactor for production of cast iron. The solid charge consisting of coke, pig iron, steel scrap and flux is fed from the top of the reactor and blast is blown radially through the tuyeres. One-dimensional (1 - D) models, wherein the governing equations are solved along the axial direction, have been reported in the literature. However, because of radial entry of blast through the tuyeres, incorporation of boundary conditions at the tuyere level poses a major difficulty in 1 - D models. In this paper, a pseudo 2 - D model for cupola has been proposed in which, the governing equations are employed in 2 - D at the tuyere level and 1 - D in the remaining portion. The solution of 2 - D equations at the tuyere level generates the appropriate boundary conditions for the remaining 1 - D portion above the tuyeres. In order to evaluate the performance of the pseudo 2 - D model, a 2 - D model was also developed. Further, the two models have been validated using reported experimental data. The study shows that the overall temperature and composition distributions obtained from the pseudo 2 - D model are quite comparable with that obtained from the 2 - D model. Also, the pseudo 2 - D model was found to be computationally faster compared to the 2 - D model. Hence, for practical design and operation exercise, pseudo 2 - D model can be effectively used

  • 61. Nurni, Viswanathan
    et al.
    Srinivasan, Mandayam Nayachavadi
    Department of Mechanical Engineering, Indian Institute of Science, Bangalore.
    Lahiri, Ashok Kumar
    Department of Metallurgy, Centre for Advanced Study, Bangalore.
    Steady state three-dimensional mathematical model for cupola1997In: Ironmaking & steelmaking, ISSN 0301-9233, E-ISSN 1743-2812, Vol. 24, no 6, p. 476-483Article in journal (Refereed)
    Abstract [en]

    A three-dimensional mathematical model has been developed to simulate the gas flow, composition, and temperature profiles inside a cupola. Comparison of the model with the reported experimental data shows the presence of a zone with low combustion rate at the tuyere level. For a 24 in (610 mm) cupola with four rows of tuyeres, the combustion zones from each tuyere overlap each other, forming an overall combustion zone of cylindrical shape of height ∼0·2 m. Using the model, it is found that the spout temperature initially increases with increasing blast velocity and attains a maximum. Further increase in blast velocity does not change the spout temperature. This suggests that smaller size tuyeres and higher permeability of the bed can give superior cupola performance

  • 62. Nurni, Viswanathan
    et al.
    Srinivasan, M.N.
    Lahiri, A.K.
    Mathematical modelling applied to FAR cupola1998Conference paper (Refereed)
  • 63.
    PremKumar, R.
    et al.
    Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology, Bombay.
    Samajdar, I.
    Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology, Bombay.
    Nurni, Viswanathan
    Singal, V.
    R&D Division, Crompton Greaves Ltd.
    Seshadri, V.
    R&D Division, Crompton Greaves Ltd.
    Relative effect(s) of texture and grain size on magnetic properties in a low silicon non-grain oriented electrical steel2003In: Journal of Magnetism and Magnetic Materials, ISSN 0304-8853, E-ISSN 1873-4766, Vol. 264, no 1, p. 75-85Article in journal (Refereed)
    Abstract [en]

    Hot rolled low Si (silicon) non-grain oriented electrical steel was cold rolled to different reductions. Cold rolled material was subsequently recrystallized, 650°C and 2 h, and then temper rolled (to 7% reduction) for the final grain growth annealing and decarburization treatment at 850°C for 2–24 h. The development of texture, grainsizeandmagneticproperties were characterized at different stages of processing. Effect of textureonmagneticproperties (watt loss and permeability) was observed to be best represented by the ratio of volume fractions of (111)〈uvw〉/(001)〈uvw〉 fibers, as estimated by convoluting X-ray ODFs (orientation distribution functions) with respective model functions. Such a ratio was termed as generalized texture factor (tf) for the non-grain oriented electrical steel. An effort was made to delink effects of grainsizeandtexture, as represented by respective tf, on watt loss and permeability by careful analysis of experimental data. In general, low tf and/or high grainsize were responsible for low watt loss and high permeability. However, individual effect of grainsize or tf onmagneticproperties was less significant at low tf or large grainsize, respectively. An attempt was made to fit regression equations, namely—linear, exponential and power, relating magneticproperties with tf andgrainsize, limiting the fitting parameters to 3. Least standard deviations, between experimental and predicted values, were obtained by power regression equations for both magneticproperties.

  • 64.
    Rozario, Albin
    et al.
    ESSAR Steel Ltd., Hazira.
    Nurni, Viswanathan
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Minerals and Metallurgical Engineering.
    Basu, Somnath
    Indian Institute of Technology, Bombay.
    Draining of gas bubbles at interface between two liquids-some observations2015In: Proceedings of the 6th International Congress on the Science and Technology of Steelmaking: ICS 2015, Beijing, China; 12 - 14 May 2015 / [ed] X. Wang, The Chinese Society for Metals , 2015, p. 328-331Conference paper (Refereed)
    Abstract [en]

    In steelmaking operations, slag foaming plays an important role in energy efficiency, heat transfer and process kinetics. A cold model simulation of slag foaming phenomenon in steel making operation was conducted to understand the effect of viscosity, density and interfacial energy between steel and slag on foaming. The experimental study was conducted at room temperature using water and oils of different viscosities which represent steel and slag respectively. Experiments on individual bubble motion across water-oil interface showed that the residence time of bubble at the interface increased with increase in interfacial tension. It also showed the foam index was influenced by the carryover of water across the interface by gas bubbles which in turn depend on the velocity of gas, density and viscosity of the mediums. Foaming experiments with oil phase only showed that the foaming height increased with increase in viscosity and decreased with further increase in viscosity by varying the gas velocity. Foam index in the oil phase experiments decreased with increase in gas velocity. But in water-oil system, the trend was entirely different from only oil phase experiment showing that the foam height and foam index not only depends on viscosity, density difference between the phases but also on the amount liquid transfer that takes place across the interface which affects the residence time of the bubbles

  • 65.
    Vijh, G.
    et al.
    Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology, Bombay.
    Gokhale, Amol A.
    Solidification Technology Division, Defence Metallurgical Research Laboratory, Kanchanbagh, Hyderabad.
    Mishra, Swati P.
    Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology, Bombay.
    Singh, Vijay A.
    Solidification Technology Division, Defence Metallurgical Research Laboratory, Kanchanbagh, Hyderabad.
    Nurni, Viswanathan
    Solid freeform fabrication of aluminum alloy components: Numerical simulations2009In: Transactions of the Indian Institute of Metals, ISSN 0019-493X, Vol. 62, no 4-5, p. 291-294Article in journal (Refereed)
    Abstract [en]

    A heat transfer model has been developed to simulate the evolution of temperature during semi-solid metal (SSM) solid freeform fabrication (SFF) process. The governing equations were solved numerically using finite difference method. Deposition of simple cubic components of A356 (Al-7%Si-0.45%Mg) aluminum alloy have been simulated. The effect of process parameters such as deposition pattern, deposition velocity, slurry cross-section and slurry temperature on the transient temperature distribution in these components have been studied. Out of the three deposition patterns studied, i.e. rotating, alternating and unidirectional, the alternating pattern enabled depositing larger interfacefree components. Increasing the slurry flow rate resulted in the deposition of larger interface-free components

  • 66.
    Wang, Haijuan
    et al.
    Division of Materials Process Science, Royal Institute of Technology (KTH).
    Nurni, Viswanathan
    Bailai, N. Bharath
    Department of Metallurgical Engineering, Indian Institute of Technology, Bombay.
    Seetharaman, Seshadri
    Division of Materials Process Science, Royal Institute of Technology (KTH).
    Modeling of reactions between gas bubble and molten metal bath-experimental validation in the case of decarburization of Fe-Cr-C melts2009In: High Temperature Materials and Processes, ISSN 0334-6455, E-ISSN 2191-0324, Vol. 28, no 6, p. 407-419Article in journal (Refereed)
    Abstract [en]

    A theoretical generic model describing the mass transfer phenomena between rising gas bubbles and a metal bath has earlier been developed by the present authors, to predict the composition change in the melt as •. consequence of blowing different oxidant gases. In order to verify the model predictions, a series of experiments involving reactions between Fe-Cr-C melts and different O2-CO2 gas mixtures were carried out. The results showed that the decarburization deviates significantly from thermodynamic paths predicted on the basis of bulk compositions and that the model was able to make reasonably reliable predictions of the changes of chromium and carbon contents in the melt as a function of time. According to the model, the compositions at the vicinity of injection point as well as at the gas-melt interface in the bubble are likely to be far from that in the bulk. The results of the present set of experiments showed, with CO2 injection, the utilization of the available oxygen for decarburization was higher as compared to O2 injection in the case of melts containing higher carbon levels (>lmass%). Reverse is the case in low carbon melts. The results also indicate relatively less Cr-losses from the metal bath when CO2 is used as the oxidant. As the model predictions are found to be reasonably reliable, the model predictions are extended to predict the impact of the variation of different process parameters.

  • 67.
    Wang, Haijuan
    et al.
    Royal Institute of Technology.
    Nurni, Viswanathan
    Ballal, N.B.
    Indian Institute of Technology, Bombay.
    Seetharaman, Seshadri
    Royal Institute of Technology.
    Modelling of physico-chemical phenomena between gas inside a bubble and liquid metal during injection of oxidant gas2010In: International journal of Chemical Reactor Engineering, ISSN 1542-6580, E-ISSN 1542-6580, Vol. 8Article in journal (Refereed)
    Abstract [en]

    Gas liquid reactors are extensively used in many metallurgical processes involving the refining of liquid metals. In these processes, reactions leading to the oxidation of various solutes in liquid metal often compete with each other, which ultimately determine the liquid metal composition. In the present paper, a model has been proposed to simulate the evolution of solute contents in a metallic melt considering mass transfer of solutes in the melt in the vicinity of the bubble, equilibrium at the gas-metal interface and gas composition evolution in the bubble during its ascent through the melt. The composition of solutes at the metal-gas interface in principle can be altered by changing the injected gas composition. The model was applied to the case of oxygen injection through a lance into liquid steel-containing C and Cr, aiming sufficient decarburization without much oxidation of Cr to the slag. The Cr loss to the slag by oxidation is generally much more than that expected based on equilibrium thermodynamics applied to the bulk metal and gas. The actual Cr loss, as shown by the present model, is determined by the composition of solutes at the metal-gas interface rather than in the bulk. The effect of change of the partial pressure of oxygen in the bubble by replacing oxygen by carbon dioxide in the injected gas and the corresponding evolution of C and Cr contents in the melt was simulated. Some preliminary experiments were conducted to validate the model predictions. The frame work of the model is generic and can be extended to many gas-liquid metal reactors in liquid metal processing

  • 68.
    Wang, Haijuan
    et al.
    Division of Materials Process Science, Royal Institute of Technology (KTH).
    Nurni, Viswanathan
    Seetharaman, Seshadri
    Division of Materials Process Science, Royal Institute of Technology (KTH).
    Oxidation kinetics of Fe-Cr and Fe-V liquid alloys under controlled oxygen pressures2010In: Energy technology 2010: conservation, greenhouse gas reduction and management, alternative energy sources ; proceedings of symposia sponsored by the Light Metals Division of the Minerals, Metals & Materials Society (TMS) ; held during TMS 2010 annual meeting and exhibition, Seattle, Washington, USA, February 14 - 18, 2010 / [ed] Neal R Neelameggham, Warrendale, Pa: TMS , 2010, p. 215-230Conference paper (Refereed)
    Abstract [en]

    In order to make the stainless steel making process efficient and environment friendly, it is essential to minimize the loss of chromium to the slag phase. With a view to investigate the advantages of using CO2 to attain moderate oxygen partial pressures in the oxidant gas during the decarburizations of stainless steel, the present experiments were carried out to understand the oxidation kinetics of Fe-Cr alloys and Fe-V alloy with gas mixtures containing CO2 In the present work, the oxidation behavior of Fe-Cr and Fe-V was examined by thermogravimetric analysis (TGA). Various mixtures of O2 and CO2 were used as the oxidant gas and the oxidation rate was followed by the weight changes as a function of time. The experiments demonstrated that the oxidation rate is independent of temperature at present experimental situation, but has strongly related to the Cr-content of the alloy as well as the oxygen partial pressure in the oxidant gas mixture. The wetting of alumina by the iron drop and the change of the drop shape during the course of the oxidation were investigated by X-ray radiography

  • 69. Wang, Haijuan
    et al.
    Nzotta, Mselly M.
    Nurni, Viswanathan
    Seetharaman, Seshadri
    Control of Cr-loss to the slag phase in high alloy steelmaking2009Conference paper (Refereed)
  • 70.
    Wang, L.J.
    et al.
    Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing.
    Nurni, Viswanathan
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Minerals and Metallurgical Engineering.
    Muhmood, Luckman
    Department of Materials Science and Engineering, Division of Materials Process Science, Royal Institute of Technology, Aditya Birla Science and Technology Company Ltd, Navi Mumbai, KJ Somaiya College of Engineering, Mumbai.
    Kapilashrami, E.
    SSAB Oxelösund AB.
    Seetharaman, Seshadri
    Division of Materials Process Science, Department of Materials Science and Engineering, Royal Institute of Technology, Kungliga tekniska högskolan, KTH, Department of Metallurgy, Royal Institute of Technology, Stockholm, Division of Metallurgy, Department of Materials Science and Technology, Royal Institute of Technology.
    Some Aspects of Interfacial Phenomena in Steelmaking and Refining2016In: Metallurgical and materials transactions. B, process metallurgy and materials processing science, ISSN 1073-5615, E-ISSN 1543-1916, Vol. 47, no 4, p. 2107-2113Article in journal (Refereed)
    Abstract [en]

    Unique experiments were designed to study the surface phenomena in steelmaking reactions. The concept of surface sulfide capacities and an understanding of the surface accumulation of surface-active species, based on experimental results, are presented. In order to understand the flow phenomenon at slag/metal interface, experiments were designed to measure the interfacial velocity of S on the surface of an iron drop immersed in an aluminosilicate slag using the X-ray sessile drop method. The oscillation of the iron drop in the slag due to the change in the surface concentration of sulfur at the slag–metal interface was monitored by X-ray imaging. From the observations, the interfacial velocity of sulfur was evaluated. Similar experiments were performed to measure the interfacial velocity of oxygen at the interface as well as the impact of oxygen potential on the interfacial velocity of sulfur. The interfacial shear viscosity and the dilatational modulus were also evaluated. In a study of the wetting of alumina base by iron drop at constant oxygen pressure under isothermal condition, the contact angle was found to be decreased with the progress of the reaction leading to the formation of hercynite as an intermediate layer creating non-wetting conditions. In the case of silica substrate, an intermediate liquid fayalite layer was formed

12 51 - 70 of 70
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf