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  1. No Access

    Article

    Effect of sodium carbonate on the oxidation of sublimates during niobium electron-beam remelting

    The effect of sodium carbonate additions on phase formation during the air oxidation of the sublimates of niobium electron-beam remelting is studied by derivatography, X-ray diffraction analysis, and electron-...

    A. G. Upolovnikova, V. M. Chumarev, R. I. Gulyaeva… in Russian Metallurgy (Metally) (2007)

  2. No Access

    Article

    Investigation of leaching of oxidized Nb-Al sublimates

    Using the method of rational planning the experiment, the sulfuric acid leaching of products that result from oxidized roasting-sintering of the sublimates of electron-beam remelting of niobium with sodium car...

    A. G. Upolovnikova, L. Yu. Udoeva, V. M. Chumarev in Russian Journal of Non-Ferrous Metals (2010)

  3. No Access

    Article

    Technological possibilities of processing the sublimates of electron-beam remelting of niobium to form ferroniobium

    The possibility of melting of ferroniobium from the sublimates of electron-beam remelting of niobium ingots is studied using thermodynamic analysis and a “hot” simulation. The basic requirements for the condit...

    V. M. Chumarev, L. I. Leont’ev, V. I. Potapov… in Russian Metallurgy (Metally) (2012)

  4. No Access

    Article

    Phase formation during the carbothermic reduction of eudialyte concentrate

    The phase transformations of eudialyte concentrate during the carbothermic reduction in the temperature range 25–2000°C are studied by thermodynamic simulation, differential thermal analysis, and X-ray diffrac...

    S. A. Krasikov, A. G. Upolovnikova, O. A. Sitnikova… in Russian Metallurgy (Metally) (2013)

  5. No Access

    Article

    Construction of viscosity diagrams for CaO–SiO2–Al2O3–8% MgO–4% B2O3 slags by the simplex lattice method

    The simplex lattice method of planning experiments is used to study the viscosities of CaO–SiO2–Al2O3–8% MgO–4% B2O3 slags in a wide chemical composition range. For each viscosity, we developed an adequate mathem...

    A. A. Babenko, S. A. Istomin, V. I. Zhuchkov, A. V. Sychev… in Russian Metallurgy (Metally) (2017)

  6. No Access

    Article

    Equilibrium boron distribution between Fe–C–Si–Al melt and boron-bearing slag

    HSC 6.1 Chemistry software (Outokumpu) and a simplex–lattice experiment design are employed in thermodynamic modeling of the equilibrium boron distribution between steel containing 0.2% C, 0.35% Si, and 0.028%...

    A. A. Babenko, V. I. Zhuchkov, L. I. Leont’ev, A. G. Upolovnikova… in Steel in Translation (2017)

  7. No Access

    Article

    Influence of B2O3 and Basicity of CaO–SiO2–B2O3–Al2O3 Slag on the Saturation Concentration of Magnesium Oxide

    The influence of boron oxide B2O3 and the basicity of CaO–SiO2–B2O3–Al2O3 slag on the saturation concentration of magnesium oxide MgO is studied by means of simplex experiment-design lattices. That permits the fo...

    A. A. Babenko, A. N. Smetannikov, V. I. Zhuchkov… in Steel in Translation (2019)

  8. No Access

    Article

    Physical Properties of CaO–SiO2–B2O3 Slags Containing 15% Al2O3 and 8% MgO

    The simplex lattice method has been applied to studying the chemical composition influence of CaO–SiO2–B2O3 oxide system containing 15% Al2O3 and 8% MgO on viscosity and solidification point (hereinafter wt % are...

    A. A. Babenko, R. R. Shartdinov, A. G. Upolovnikova… in Steel in Translation (2019)

  9. No Access

    Article

    Theoretical Bases and Technology of Steel Exhaustive Metal Desulfurization and Direct Microalloying with Boron Beneath Basic Boron-Containing Slags

    Results of theoretical and experimental studies of the physicochemical properties of slags of the CaO–SiO2–B2O3 system containing 15% Al2O3 and 8% MgO lie at the basis for the development of technology for exhaus...

    A. A. Babenko, L. A. Smirnov, A. G. Upolovnikova, A. N. Smetannikov… in Metallurgist (2020)

  10. No Access

    Article

    Study of the Microstructure and Phase Composition of Crude Niobium Electron-Beam Remelting Sublimates

    crude niobium. The phase composition of sublimates formed during the first remelting of crude niobium is studied by scanning electron microscopy and X-ray microanalysis. Sublimates typically form structures of...

    V. M. Chumarev, A. G. Upolovnikova, N. I. Sel’menskikh in Metallurgist (2020)

  11. No Access

    Article

    Equilibrium Content of Lanthanum in Metal under the Slag of CaO–SiO2–La2O3–15% Al2O3–8% MgO System

    Thermodynamic modeling results of lanthanum equilibrium content in metal under the slag of CaO–SiO2–La2О3–Al2O3–MgO system corresponding to the chemical composition of 16 points of local simplex plan are presente...

    A. G. Upolovnikova, A. A. Babenko, L. A. Smirnov in Steel in Translation (2020)

  12. No Access

    Article

    Thermodynamic Modeling of Reduction of Cerium from Slags of CaO–SiO2–Ce2O3–15Al2O3–8MgO by Calcium Carbide Additives

    Thermodynamic modeling of the reduction of cerium from slags of the CaO–SiO2–Ce2O3 system containing 15% Al2O4 and 8% MgO, with aluminum dissolved in the metal together with calcium carbide additives at temperatu...

    A. G. Upolovnikova, A. A. Babenko, A. N. Smetannikov in Metallurgist (2021)

  13. No Access

    Article

    Direct Microalloying of Steel with Cerium under Slags of СаО–SiO2–Ce2O3–15% Al2O3–8% MgO System with Additional Reducing Agents

    An assessment of the possibility of steel direct microalloying with cerium was performed using thermodynamic modeling of cerium reduction from slags of CaO–SiO2–Ce2O3 system containing 15% Al2O3 and 8% МgO, addit...

    A. G. Upolovnikova, A. A. Babenko, L. A. Smirnov, L. Yu. Mikhailova in Steel in Translation (2022)

  14. No Access

    Article

    Fundamental Studies of Physical-Mechanical Properties of Environmentally Friendly Fluorine-Free Slags and Their Use in Ladle Steel Industry

    This paper describes theoretical and experimental studies of the dependence of the viscosity, coefficient of sulfur and boron distribution between slag and metal, as well as wear degree of periclase-carbon ref...

    A. A. Babenko, L. A. Smirnov, E. V. Protopopov, A. G. Upolovnikova… in Steel in Translation (2022)

  15. No Access

    Article

    Construction of Viscosity Diagrams for Slags Containing Chromium and Boron Oxides by the Simplex Lattice Method

    The viscosities of the slags of the CaO–SiO2–Cr2O3–3% Al2O3–8% MgO–6% B2O3 system over a wide range of their chemical compositions are studied using the simplex lattice method of experimental design. For each vis...

    A. A. Babenko, R. R. Shartdinov, A. N. Smetannikov… in Russian Metallurgy (Metally) (2023)

  16. No Access

    Article

    Study of Physicochemical Characteristics of Niobium-Containing Oxide Materials. Part 1. Thermodynamic Simulation

    The paper provides brief information about the state of production and use of niobium in steelmaking and about niobium deposits in Russia. Pyrochlore-apatite ores contain a significant amount of phosphorus; th...

    O. V. Zayakin, V. I. Zhuchkov, A. V. Sychev, L. Yu. Mikhailova… in Metallurgist (2023)

  17. No Access

    Article

    Effects of Basicity on the Phase Composition, Structure, Viscosity, and Crystallization Temperature of CaO–SiO2–Al2O3–MgO–B2O3 Slags

    The effect of basicity on the phase composition, structure, viscosity and crystallization temperature of CaO–SiO2–Al2O3–MgO–B2O3 fluorine-free slags was studied using vibrational viscometry and thermodynamic phas...

    A. A. Babenko, R. R. Shartdinov, A. G. Upolovnikova, A. N. Smetannikov in Metallurgist (2023)

  18. No Access

    Article

    Effect of Cerium Oxide and the Basicity of Slags on Their Viscosity and the Temperature of the Beginning of Solidification

    The influence of the cerium oxide content and the basicity of slag on the viscosity and the temperature of the beginning of solidification of the CaO–SiO2–Ce2O3 system containing 15% Al2O3 and 8% MgO is studied u...

    A. G. Upolovnikova, R. R. Shartdinov, A. N. Smetannikov in Russian Metallurgy (Metally) (2023)

  19. No Access

    Article

    Structure and viscosity of slags containing cerium oxide

    The effect of cerium oxide on the viscosity and crystallization temperature of slags of the CaO–SiO2–Ce2O3–Al2O3–MgO oxide system is studied using an electrovibrational viscometer. The structural characteristics ...

    A. G. Upolovnikova, R. R. Shartdinov, A. N. Smetannikov in Metallurgist (2024)

  20. No Access

    Article

    Equilibrium interphase distribution of chromium depending upon stainless steel slag temperature and basicity

    With the aim of studying the occurrence of chromium reduction during argon-oxygen refining using boron oxide as a flux, thermodynamic modelling of the equilibrium interfacial distribution of chromium between s...

    A. A. Babenko, A. G. Upolovnikova, I. N. Kel’, R. R. Shartdinov in Metallurgist (2024)