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Severstal is a Russian company mainly operating in the steel and mining industry, centred in the northern city of Cherepovets. Severstal is listed on the Moscow Exchange and LSE. As of 2009, it is the largest steel company in Russia according to the Metal Bulletin. The majority of the company's stock belongs to Alexey Mordashov. Severstal owns major industrial facilities in Russia, Ukraine, Kazakhstan, France, Italy and the United States, as well as in several African countries. The company also has mining assets in Russia and the USA, thus securing its supply of raw materials. Severstal also owns Severstal Cherepovets, a professional ice hockey club which plays in the Kontinental Hockey League.Severstal company also owns an airline - Severstal Air, operating mainly from Vnukovo Moscow Airport and from its home base Cherepovets Airport. Wikipedia.


Mandal K.,Severstal | Irons G.A.,McMaster University
Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science | Year: 2013

A furnace, approximately 1 m3 in capacity, was built to measure the efficiency of heat transfer from a propane-oxygen burner to different types of industrial steel scrap. Supplementary measurements were undertaken to measure the scrap density, size, and void fraction to insure complete combustion of the propane and to measure the extent of scrap oxidation. Local values of temperature in the scrap bed were measured along with the exit temperature of the off gas. The off gas temperature was a direct measurement of the overall efficiency of heating. It was found that smaller and denser scrap was heated more effectively. Configurations that increased the path length of the gas also increased the efficiency of heating. In Part II, a mathematical model is developed to compare with the measured temperatures. © 2012 The Minerals, Metals & Materials Society and ASM International. Source


Mandal K.,Severstal | Irons G.A.,McMaster University
Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science | Year: 2013

A computational fluid dynamics code was developed to model the heating of a bed of porous steel scrap by combustion gases from a burner. The code accounted for nonuniform void fraction in the bed; turbulent, non-Darcian flow, heat transfer from the gas to the scrap; and radiation. The measured bed porosity values were used in the code. Because steel scrap pieces are very irregular in shape and size, the effective particle diameter was fitted to measurements made in a 1-m3 capacity furnace, as reported in part I. It was found that the lower porosity of the scrap was the most beneficial in increasing the efficiency of heat transfer to the scrap bed because the interfacial area is larger. The effect of particle size was much smaller. It was found that the configurations that increased the residence time or path length of the gases increased the efficiency. The measured porosity of the bed approached unity at the walls, so this provided an easy path for the gas to short-circuit the bed, which limited the effectiveness of decreasing the porosity to increase heat-transfer efficiency. Similarly, simulations of nonuniform scrap distributions reduced efficiency of heat transfer due to short circuiting. The implications of the findings for industrial operations are discussed. © 2012 The Minerals, Metals & Materials Society and ASM International. Source


Worral E.J.,Severstal | Coley K.S.,McMaster University
Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science | Year: 2010

The kinetics of the oxygen exchange reaction between carbon dioxide and carbon monoxide were measured on iron, wüstite, and magnetite surfaces. This was done through the use of an isotope exchange technique. The measured rate constants are dependent on the oxygen activity. This dependence is expressed by ka = koa O -m . The parameter m was found to have values between 0 and 1. It was found that, in the iron region, the apparent rate constant was independent of the oxygen partial pressure (i.e., m = 0) at 1123 K (850 °C) and that it was inversely dependent on the oxygen partial pressure (i.e., m = 1) for the magnetite region at 1123 K (850 °C) and 1268 K (995 °C). In the wüstite region, m was found to be equal to 0.51, 0.66, and 1.0 for the w1, w 2, and w3 pseudo phases, respectively, at 1268 K (995 °C). At 1123 K (850 °C), in wüstite, m was found to be equal to 0.59 and to 1.0 for the w1 and w3 pseudo phases, respectively. © 2010 The Minerals, Metals & Materials Society and ASM International. Source


Street S.,Severstal
Iron and Steel Technology | Year: 2012

Inventory management has a large influence on raw material quality. This paper reviews cause and effect of using stockpiled iron ore pellets on blast furnace operations. Source


Trademark
Severstal | Date: 2013-01-08

Coal. Coated and uncoated flat rolled carbon steel coils.

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