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Yekaterinburg, Russia

Frolov Y.A.,Uralelektra Scientific and Production Enterprise | Polotskii L.I.,Ural Institute of Metals
Metallurgist | Year: 2015

This article presents a three-dimensional mathematical (dynamic) model of the sintering process. The model was developed to solve theoretical and practical problems. It allows real-time determination of the distributions of the temperatures and the chemical compositions of the charge, the melt, the sinter cake, and the gas in the bed of charge materials with allowance for transients. The model also permits real-time determination of the temperatures in the pallets and the parameters of the gas flow (including infiltrating air) in the flue system of the sintering machine. © 2015 Springer Science+Business Media New York. Source


Frolov Y.A.,Uralelektra Scientific and Production Enterprise | Polotskii L.I.,Ural Institute of Metals
Metallurgist | Year: 2015

A three-dimensional mathematical (dynamic) model is presented to describe the sintering process. The model was developed to solve theoretical and practical problems. It allows real-time determination of the dynamic distribution of the temperature and chemical composition of the charge, the melt, the sinter cake, and the gas in the bed with allowance for transients, as well as the temperatures in the pallets and the parameters of the gas flow in the flue channel – including air infiltration. © 2015, Springer Science+Business Media New York. Source


Kazak A.K.,Ural Institute of Metals | Didenko V.V.,Emal Stavan Company
Metallurgist | Year: 2016

The article considers high-temperature enamel coatings prepared from charges synthesizing enamel with a sufficiently high fi ring temperature and providing the required protective properties and heat resistance. Brief scientific and experimental research is given for the coatings obtained based on compositions modified with additions of refractory fillers added in the form of nanosize oxide powders. © 2016 Springer Science+Business Media New York Source


Lazutkina O.R.,Ural State Technical University | Kazak A.K.,Ural Institute of Metals | Ponomareva M.V.,Ural State Technical University
Glass and Ceramics (English translation of Steklo i Keramika) | Year: 2011

The dependence of the oxidation rate of steel under a film of enamel at the firing temperatures of the enamel is examined. The size of the critical gas bubble which breaks through the enamel film during annealing is calculated and determined experimentally. © 2011 Springer Science+Business Media, Inc. Source


Frolov Y.A.,Research and Production Enterprise Uralelektra | Polotsky L.I.,Ural Institute of Metals
6th Int. Congress on the Science and Technology of Ironmaking 2012, ICSTI 2012 - Including Proceedings from the 42nd Ironmaking and Raw Materials Seminar, and the 13th Brazilian Symp. on Iron Ore | Year: 2012

This paper proposes the three-dimensional mathematical model of sintering process which developed for decision of theoretical and practical problems. The model allows to achieve dynamic distribution of temperatures and chemical composition of mix, smelt, cake, and gas in volume of the sintering bed in a real operating mode of sinter machine, taking into account transient processes, as well as parameters of a gas stream in waste gases system with account of air leakages in elements of waste gas system. Sintering process is presented through differential equations system in private derivatives for the mix parameters and ordinary differential equations for gas stream parameters. To describe chemical reactions in a bed the frontal model is accepted. A grain of ore part is considered as a sphere of determinate diameter in which fronts CaCO 3→CaO, MgCO3→MgO, Fe2O 3→FeO, FeO→Fe2O3 are moving inside. A particle of solid fuel is considered as a sphere of variable diameter decreasing during carbon burning process. Moving fronts speeds are function of temperature of material and gas composition. For research purposes the model is used particularly to develop a theory of mix drying in a bed and gas dynamic of sintering process. For applied problems the model is used for calculation of sintering and cooling zones of sinter machine in Dneprodzerzhinsk (Ukraine) with the area of 520 M2, and for reconstruction of sinter machines of the Chelyabinsk Steel Plant (Russia) with the area of 240 M2. Source

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