Search results for: Yu. S. Kuznetsov

Items from 1 to 8 out of 8 results

article

Reduction of Iron Oxides by Carbon and Water Vapor

Yu. S. Kuznetsov, O. I. Kachurina

Steel in Translation > 2019 > 49 > 5 > 306-318

The complete reduction of iron oxide on heating the initial Fe₃O₄–H₂O–C system with isothermal holding is subjected to thermodynamic analysis. (Note that the initial system contains e_o moles of Fe₃O₄ and b_o moles of H₂O, with excess carbon.) The processes in the system may be divided into four stages. First, the gasification of carbon by water vapor at temperatures below 880 K activates the reaction...

article

Comparison of the Reducibilities of Hydrogen and Carbon Monoxide for Iron Oxides

Yu. S. Kuznetsov, G. G. Mikhailov, O. I. Kachurina

Russian Metallurgy (Metally) > 2019 > 2019 > 7 > 698-709

—Thermodynamic analysis of the reduction of iron oxides in gas mixtures with H₂ and CO shows that the ratio of the reducibilities of these gases (γ) can decrease or increase with temperature or can be temperature-independent under different conditions. This contradicts the commonly accepted assertion that the reducibilities of H₂ and CO at 1093 K are equal and that the reducibility of H₂ increases...

article

Nonlinear Wave and Cavitation Processes and Their Effect on the Mechanical Properties of Viscous Solutions

S. R. Ganiev, Yu. S. Kuznetsov, O. V. Shmyrkov

Doklady Physics > 2019 > 64 > 2 > 49-52

This paper presents the experimental results of studying the effect of nonlinear wave and cavitation processes occurring in the working elements of a flow in hydrodynamic vortex- and plane-type generators with differently shaped flow bodies on the physicomechanical properties of a clay suspension. The models of a vortex-type generator with tangential and radial channels for the supply of a working...

article

Redox Properties of Gas Phases

Yu. S. Kuznetsov, O. I. Kachurina

Steel in Translation > 2018 > 48 > 1 > 25-33

In the H₂–O₂–C system, in the general case, two reversible reactions of carbon gasification and the water gas reaction, the gas mixture H₂–H₂O–CO–CO₂ is formed at high temperatures. In this mixture, the very low content of oxygen formed by the dissociation of H₂O and CO₂ is represented by the oxygen potential log ( $${p_{{O_2}}}$$ p O 2 , atm). Thus, the redox properties may be assessed...

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Laboratory and Field Testing of Wave Machines and Devices for Preparation of Fine-Particle Suspensions

V. Yu. Artamonov, S. R. Ganiev, Yu. S. Kuznetsov, A. P. Pustovgar, more

Journal of Machinery Manufacture and Reliability > 2018 > 47 > 1 > 104-111

The paper presents the results of comprehensive research of the influence of wave technologies on the physical and mechanical properties of fine-particle clay suspensions. The research was conducted under laboratory conditions at NTs NVMT IMASh of the Russian Academy of Sciences and field conditions. It is shown that the wave treatment of the drilling mud by flow-type hydrodynamic vortex generators...

article

System analysis of the reduction of iron oxides

G. G. Mikhailov, Yu. S. Kuznetsov, O. I. Kachurina

Russian Metallurgy (Metally) > 2014 > 2014 > 3 > 179-184

The parameters of the equilibria that take place during the reduction of iron oxides in the water gas medium (CO-CO₂-H₂-H₂O) in the presence and absence of carbon are calculated. The possibilities of the diagram technique of representing results are discussed. The following two spatial diagrams are plotted: one of them reflects a set of three-phase equilibrium surfaces, and the curved surface in the...

article

Reduction of iron oxides by wet gas in the presence of carbon

G. P. Vyatkin, G. G. Mikhailov, Yu. S. Kuznetsov, O. I. Kachurina, more

Steel in Translation > 2013 > 43 > 4 > 161-167

The equilibrium parameters in the reduction of iron oxides by wet gas (CO + CO₂ + H₂ + H₂O) in the presence of carbon are calculated. Graphical representation of the results is discussed, and a diagram is plotted consisting of a set of three-phase equilibrium surfaces and four-phase equilibrium curves, whose point of intersection determines the parameters of invariant five-phase equilibrium. The composition...

article

Reduction of iron oxides in a humid atmosphere

G. P. Vyatkin, G. G. Mikhailov, Yu. S. Kuznetsov, O. I. Kachurina, more

Steel in Translation > 2012 > 42 > 2 > 103-106

Original Russian Text © G.P. Vyatkin, G.G. Mikhailov, Yu.S. Kuznetsov, O.I. Kachurina, S.V. Digonskii, 2012, published in “Izvestiya VUZ. Chernaya Metallurgiya,” 2012, No. 2, pp. 10–13.

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Search results for: Yu. S. Kuznetsov

Reduction of Iron Oxides by Carbon and Water Vapor

Comparison of the Reducibilities of Hydrogen and Carbon Monoxide for Iron Oxides

Nonlinear Wave and Cavitation Processes and Their Effect on the Mechanical Properties of Viscous Solutions

Redox Properties of Gas Phases

Laboratory and Field Testing of Wave Machines and Devices for Preparation of Fine-Particle Suspensions

System analysis of the reduction of iron oxides

Reduction of iron oxides by wet gas in the presence of carbon

Reduction of iron oxides in a humid atmosphere

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