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Bizhanov A.M.,J. C. Steel and Sons Inc. | Kurunov I.F.,Novolipetsk Metallurgical Combine | Durov N.M.,Moscow Institute of Steel And Alloys | Nushtaev D.V.,TESIS Company | Ryzhov S.A.,TESIS Company
Metallurgist | Year: 2012

Physical modeling and a numerical simulation are performed to study the effect of the form of the cross section of an extruded briquette (brex) on its mechanical strength. It is shown that brex of oval cross section subjected to pressure from a load applied along the minor axis (with a semi-axis ratio of 1:2) are almost twice as strong as brex having a circular cross section. The study demonstrates the effectiveness of the numerical method that was used. © 2012 Springer Science+Business Media New York.


Bizhanov A.M.,J. C. Steele and Sons Inc. | Kurunov I.F.,Novolipetsk Metallurgical Combine | Durov N.M.,Moscow Institute of Steel And Alloys | Nushtaev D.V.,TESIS Company | Ryzhov S.A.,TESIS Company
Metallurgist | Year: 2013

Different aspects of the mechanical strength of brex (extruded briquettes) are studied. A finite-element modeling is performed of the fracture of long brex as they leave the die. A model is also constructed to describe the position of brex of oval cross section in a pile, the model making it possible to determine the distribution of the orientations of brex in the pile. Strength tests of brex specimens confirmed previous conclusions on the compressive strength of brex and the tensile splitting of oval brex. A relation is found that quantitatively links the consumption of brex with their compressive strength. Possible mechanisms for the fracture of solid and hollow brex are compared. © 2013 Springer Science+Business Media New York.


Kurunov I.F.,Novolipetsk Metallurgical Combine | Bizhanov A.M.,J. C. Steele & Sons Inc. | Wakeel A.K.,Qatar Steel Compan | Mishra B.,Rajgangpur
Metallurgist | Year: 2016

Results are presented from tests involving the metallization of extrusion briquettes in an industrial reactor (Midrex process). The brex are made from screenings of oxidized pellets, partially metallized sludge, mill scale, and EAF dust with the use of two types of binders. The effect of the type of binder on the briquettes’ strength and degree of metallization is studied. Optical and electron microscopy are used to examine the structure of green briquettes and briquettes after their reduction. © 2016 Springer Science+Business Media New York


Kurunov I.F.,Novolipetsk Metallurgical Combine | Bizhanov A.M.,J. C. Steele and Sons Inc. | Tikhonov D.N.,Novolipetsk Metallurgical Combine | Mansurova N.R.,Novolipetsk Metallurgical Combine
Metallurgist | Year: 2012

Brex made from metallurgical slags, iron-ore concentrate, manganese ore, screenings of metallized pellets and ferroalloys, coke fines, and coal were studied to evaluate their mechanical strength and hot strength and determine their behavior during heating in a reducing atmosphere. The metallurgical properties of brex make it possible to successfully use them in steelmaking and various production processes in extractive metallurgy. © 2012 Springer Science+Business Media, Inc.


Kurunov I.F.,Novolipetsk Metallurgical Combine | Bizhanov A.M.,J. C. Steele and Sons Inc.
Metallurgist | Year: 2014

This article discusses the successful operation of an industrial-scale line built at the metallurgical plant of Suraj Products Ltd. in Rourkela (India) in April 2011 to produce briquettes by stiff vacuum extrusion. Made from metallurgical wastes (sludge and top dust) and iron-ore fines, the extrusion briquettes (brex) are a new component of the blast-furnace charge. The metallurgical properties of brex have made it possible to increase the brex content of the charge to 100%, eliminate limestone from the charge, and reduce coke consumption by 200 kg/ton. © 2014 Springer Science+Business Media New York.


Bizhanov A.M.,J. C. Steele and Sons Inc. | Kurunov I.F.,Novolipetsk Metallurgical Combine | Ivonin D.V.,Russian Academy of Sciences
Metallurgist | Year: 2013

A hydrodynamic approach is used to explain the migration of the fine fraction of brex to their surface during extrusion. Such migration can have a significant effect on the strengthening of the surface layers of brex. © 2013 Springer Science+Business Media New York.


Dalmia Y.K.,Suraj Products Ltd. | Kurunov I.F.,Novolipetsk Metallurgical Combine | Steele R.B.,J.C. Steele and Sons Inc. | Bizhanov A.M.,J.C. Steele and Sons Inc.
Metallurgist | Year: 2012

An industrial line producing briquettes from metallurgical sludge and dust by the stiff-vacuum extrusion technology developed by J.C. Steele & Sons (U.S.) began operation in April 2011 at the metallurgical plant of Suraj Products Ltd. in Rourkel, India. The technology was first used at the Bethlehem Steel Corp. plant in 1993. The cement-bonded extrusion briquettes (brex) obtained by this method are a new-generation component of the blast-furnace charge, and their metallurgical properties allow them to be successfully used for blast-furnace smelting. The use of a charge composed of 80% brex on a small blast furnace has made it possible to eliminate the use of raw fluxes and reduced coke consumption by 150 kg/ton pig iron. © 2012 Springer Science+Business Media, Inc.


Korshikov G.V.,Lipetsk State Technological University | Titov V.N.,Novolipetsk Metallurgical Combine | Mikhailov V.G.,Lipetsk State Technological University
Metallurgist | Year: 2015

This article discusses the main mechanisms by which the oxygen content of the blast and high gas pressure affect the smelting rate in a blast furnace. It is shown that oxygen enrichment of the blast-just as an increase in gas pressure in the furnace-is a means of intensifying the smelting operation. Oxygen enrichment of the blast accomplishes this by reducing the quantity of gases flowing inside the furnace. © 2015 Springer Science+Business Media New York.


Dolmatov A.P.,Novolipetsk Metallurgical Combine | Dolgikh P.P.,Novolipetsk Metallurgical Combine | Usachev M.A.,Novolipetsk Metallurgical Combine | Shipilov V.D.,Novolipetsk Metallurgical Combine
Metallurgist | Year: 2015

To reduce the adhesion of contaminants to the straightening rollers of a machine designed to straighten cold-rolled steel strip that has been annealed and undergone temper rolling, it has been proposed that the rollers of the stretch leveler be sprayed from above and below with a 5.0–6.0% solution of process lubricant Volgol-355. A series of measures has been implemented to optimize the conditions under which the solution is delivered and solution residues are removed from the strip's surface. This has eliminated the formation of streaks of contaminants on the surface, reduced the number of "scratches" and "dents" formed on it, improved the surface finish of the straightened rolled product, and made it possible to begin cutting the strip and shipping it to complete customers' orders. The deviation of the strip from planarity is no greater than 2 mm/lin. m. © 2015, Springer Science+Business Media New York.


Kurunov I.F.,Novolipetsk Metallurgical Combine
Metallurgist | Year: 2012

An analysis is made of the total emission of CO 2 when blast-furnace and converter sludges are recycled by briquetting and the briquettes are used to make pig iron by different technologies. The lowest CO 2 emission is seen with the use of green briquettes and briquettes metallized in a rotary hearth furnace. The CO 2 emissions are 1.3 and 1.8 times higher, respectively, when green briquettes melted in an OXYCUP cupola and briquettes metallized by the Welz process are used to smelt pig iron. © 2012 Springer Science+Business Media, Inc.

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