Iron Melt

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Xu Xin-he - One of the best experts on this subject based on the ideXlab platform.

  • Modeling and Simulation of Iron Melt Transport System
    Information & Computation, 2007
    Co-Authors: Xu Xin-he
    Abstract:

    By analyzing the system objects and using modeling and simulation technologies, the corresponding object models are established. A knowledge-based event scheduling simulation strategy is adopted, an integrated train dispatching model which includes materials, technics and transportation is established, and Iron Melt route choice and automatic collision avoidance algorithms for molten Iron transportation in Iron steel plants are realized. The rationa-lity of Iron Melt distribution and railroad layout can be evaluated by the simulation system. The simulation results have been applied to practice with good economic benefit, and offers directions for related researches and automation in the industrial arts of railroads.

  • Design and Realization of the Iron Melt Transport Simulating System
    2003
    Co-Authors: Xu Xin-he
    Abstract:

    In this paper an Iron Melt transport system is analyzed. In allusion to the characteristics of the system, which is a hybrid dynamic system, is different from railage system, and includes human factors, an Iron Melt transport simulating system is established. By the solving and application of a series of key techniques to the simulation system, the simulation system can analyze the characteristics of present systems and of those under construction. The conclusions can not only serve as decision-support principles but also provide parameters and references for the optimization of Iron Melt transport system in locale.

Yuri N. Palyanov - One of the best experts on this subject based on the ideXlab platform.

  • Solubility of carbon and nitrogen in a sulfur-bearing Iron Melt: Constraints for siderophile behavior at upper mantle conditions
    American Mineralogist, 2019
    Co-Authors: Alexander G. Sokol, Alexander F. Khokhryakov, Yuri M. Borzdov, Igor N. Kupriyanov, Yuri N. Palyanov
    Abstract:

    Abstract Carbon solubility in a liquid Iron alloy containing nitrogen and sulfur has been studied experimentally in a carbon-saturated Fe-C-N-S-B system at pressures of 5.5 and 7.8 GPa, temperatures of 1450 to 1800 °C, and oxygen fugacities from the IW buffer to log fO2 ΔIW-6 (ΔIW is the logarithmic difference between experimental fO2 and that imposed by the coexistence of Iron and wüstite). Carbon saturation of Fe-rich Melts at 5.5 and 7.8 GPa maintains crystallization of flaky graphite and diamond. Diamond containing 2100–2600 ppm N and 130–150 ppm B crystallizes in equilibrium with BN within the diamond stability field at 7.8 GPa and 1600 to 1800 °C, while graphite forms at other conditions. The solubility of carbon in the C-saturated metal Melt free from nitrogen and sulfur is 6.2 wt% C at 7.8 GPa and 1600 °C and decreases markedly with increasing nitrogen. A 1450–1600 °C graphite-saturated Iron Melt with 6.2–8.8 wt% N can dissolve: 3.6–3.9 and 1.4–2.5 wt% C at 5.5 and 7.8 GPa, respectively. However, the Melt equilibrated with boron nitride and containing 1–1.7 wt% sulfur and 500–780 ppm boron dissolves twice less nitrogen while the solubility of carbon remains relatively high (3.8–5.2 wt%). According to our estimates, nitrogen partitions between diamond and the Iron Melt rich in volatiles at DNDm/Met=0.013−0.024. The pressure increase in the Fe-C-N system affects Iron affinity of N and C: it increases in nitrogen but decreases in carbon. The reduction of C solubility in a Fe-rich Melt containing nitrogen and sulfur may have had important consequences in the case of imperfect equilibration between the core and the mantle during their separation in the early Earth history. The reduction of C solubility allowed C supersaturation of the liquid Iron alloy and crystallization of graphite and diamond. The carbon phases could float in the segregated core liquid and contribute to the carbon budget of the overlying silicate magma ocean. Therefore, the process led to the formation of graphite and diamond, which were the oldest carbon phases in silicate mantle.

Iulian Riposan - One of the best experts on this subject based on the ideXlab platform.

  • graphite degeneration in the superficial layer of high si ductile Iron casting as influence of inoculation and protective coating against sulphur diffusion into the Iron Melt
    Journal of materials research and technology, 2019
    Co-Authors: Denisa Anca, Mihai Chisamera, Stelian Stan, Iulian Riposan
    Abstract:

    Abstract The objective of the present paper is to evaluate the occurrence of degenerate graphite in a surface layer on high Si ductile Iron (0.032%Mgres, 3.37%C, 3.44%Si, 0.44%Mn, 4.43%CE), solidified in standard thermal analysis ceramic cup. S-bearing coating is applied on the inner surface of ceramic cup, with and without Iron powder protective coating against S diffusion into the Iron Melt. Based carbonic material coating is also used as reference. Eutectic undercooling is normally 23% decreased by inoculation, but also depending on the nature of the applied coatings: less effect of S-bearing coating, while carbon and especially Iron powder-bearing coatings reduced the beneficial effect of inoculation (higher addition, higher undercooling). Measured surface layer thickness in only Mg treated Iron casting is higher by matrix evaluation (912 μm) compared to 716 μm obtained by graphite evaluation. Inoculation applied after Mg-treatment leads to decreased surface layer thickness to 195 μm and 108 μm, respectively. S-bearing coating increases the skin size of inoculated Iron casting to 253 μm (matrix evaluation) and 176 μm (graphite evaluation). A layer Iron powder addition on the S-bearing coating reduces the skin size to 132 μm and 66 μm, respectively, while supplementary Iron powder addition avoids the surface layer formation, similarly to based carbonic material coating application.

Denisa Anca - One of the best experts on this subject based on the ideXlab platform.

  • graphite degeneration in the superficial layer of high si ductile Iron casting as influence of inoculation and protective coating against sulphur diffusion into the Iron Melt
    Journal of materials research and technology, 2019
    Co-Authors: Denisa Anca, Mihai Chisamera, Stelian Stan, Iulian Riposan
    Abstract:

    Abstract The objective of the present paper is to evaluate the occurrence of degenerate graphite in a surface layer on high Si ductile Iron (0.032%Mgres, 3.37%C, 3.44%Si, 0.44%Mn, 4.43%CE), solidified in standard thermal analysis ceramic cup. S-bearing coating is applied on the inner surface of ceramic cup, with and without Iron powder protective coating against S diffusion into the Iron Melt. Based carbonic material coating is also used as reference. Eutectic undercooling is normally 23% decreased by inoculation, but also depending on the nature of the applied coatings: less effect of S-bearing coating, while carbon and especially Iron powder-bearing coatings reduced the beneficial effect of inoculation (higher addition, higher undercooling). Measured surface layer thickness in only Mg treated Iron casting is higher by matrix evaluation (912 μm) compared to 716 μm obtained by graphite evaluation. Inoculation applied after Mg-treatment leads to decreased surface layer thickness to 195 μm and 108 μm, respectively. S-bearing coating increases the skin size of inoculated Iron casting to 253 μm (matrix evaluation) and 176 μm (graphite evaluation). A layer Iron powder addition on the S-bearing coating reduces the skin size to 132 μm and 66 μm, respectively, while supplementary Iron powder addition avoids the surface layer formation, similarly to based carbonic material coating application.

  • The Influence of Sulphur and Oxigen Additions in Mg-Treated Iron on the Cooling Curves Parameters
    Solid State Phenomena, 2014
    Co-Authors: Denisa Anca, Elena Panciu, Mihai Chisamera
    Abstract:

    The main objectiv of this experimental reserch is a comparative analysis of sulphur and oxygen effects on the cooling curves parameters at different Iron Melt modifying potential (residual Mg content). For the experiment, three Irons with different modifying potential (0.0014, 0.0213 and 0.033 wt % residual Mg content respectively) were developed. After Ca-Ba inoculation, the three Irons were additional treated by stoichiometric equivalent additions of sulphur or oxygen as FeS2 and Fe2O3 respectively. Both FeS2 and Fe2O3 sources were placed on the bottom of standard Quik-Cup moulds,usualy used for Iron Melt thermal analysis. The effect of sulphur and oxygen on the standard and nonconventional cooling curves parameters were evaluated to a more deep understanding of the cast Iron solidification mechanism. The cooling curves parameters are strongly influenced both by the initial residual Mg level of Iron Melt and afterwords sulphur/oxygen additions. A very complex and sometimes confused variation of the cooling curves parameters was recorded because of different actions of the three factors (Iron Melt modifying potential, sulphur and oxygen). As a previous paper highlighted, sulphur addition has a strong graphite decompactizing effect while oxygen addition has mostly an inoculant effect.

Nikolay V. Sobolev - One of the best experts on this subject based on the ideXlab platform.

  • Diamond-rich placer deposits from Iron-saturated mantle beneath the northeastern margin of the Siberian Craton
    Lithos, 2020
    Co-Authors: Vladislav S. Shatsky, Alexey Ragozin, Alla M. Logvinova, Richard Wirth, Viktoria V. Kalinina, Nikolay V. Sobolev
    Abstract:

    Abstract We demonstrate for the first time the presence of Iron carbides in placer diamonds from the northeastern region of the Siberian craton. It was found that the inclusions are polycrystalline aggregates, and Iron carbides filling the fissures in the diamonds, thus providing clear evidence that the Iron Melts were captured first. Iron carbides were identified in diamonds containing mineral inclusions of eclogitic (Kfs, sulfide) and peridotitc (olivine) paragenesis. Iron carbides with minor amounts of admixed nickel were detected in a diamond sample containing an olivine inclusion (0.3 wt% Ni), indicating that the Iron Melt was not in equilibrium with the mantle peridotite.The low nickel contents of the Iron carbides provide the best evidence that the subducted crust is a likely source of the Iron Melt. Diamonds containing carbide inclusions are characterised by a relatively low nitrogen aggregation state (5–35%), which is not consistent with the high temperature of the transition zone. Therefore, we have reason to assume that the studied diamonds are from the lower regions of the lithosphere. Considering all factors, the model for the interaction of the ascending asthenospheric mantle with the subducting slab seems to be more realistic.