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Moscow, Russia

Mechel is one of Russia’s leading mining and metals companies, comprising producers of coal, iron ore in concentrate, steel, rolled steel products. Headquartered in Moscow, sells its products in Russia and overseas, and is formally known as Open Joint Stock Company Mechel. Wikipedia.

Brodskii V.A.,Mechel
Coke and Chemistry | Year: 2011

The construction of geographic and commodity boundaries is considered in relation to the Rus-sian market for coking-coal concentrates. In this market, uniform commodities are purchased and used in mixtures with one another. Such commodities require special terminology and algorithms for the construction of the market boundaries. All Russian coking-coal concentrates should be regarded as commodities within a single market. © 2011 Allerton Press, Inc. Source

Geanta V.,Polytechnic University of Bucharest | Preda S.,Mechel | Stefanoiu R.,Polytechnic University of Bucharest
Metalurgia International | Year: 2013

Proper management of slag regime at steelmaking in Electric Arc Furnaces is a prerequisite for obtaining a quality steel. Slag is used to protect the metal bath from oxidation, to adjust the energy regime inside the metal bath, to achieve the dephosporization, deoxidation, desulphurization complex processes and to protect the refractory lining. In order to increase the productivity and refractory lining lifetime, at COSS-EBT furnace from Mechel Otelu Roşu mill, it is used small quantities of foaming slag, saturated in MgO (8-12%). For COSS-EBT system, in a case of maximum radiation of the electric arch, it is imposed that the FLUXMAG material (which contains high quantity of MgO) to be replaced with dolomitic lime. The requirement is imposed for reducing the lime quantity used for slag formation. In this respect, the effects resulting from the analysis of COSS-EBT furnaces operation during working campaigns were remarkable both in terms of economy and technology. Source

Kaplan A.V.,NTTs Geotekhnologiya Company | Davydova T.V.,NTTs Geotekhnologiya Company | Gribkov O.A.,Mechel
Metallurgist | Year: 2011

Environmental measures implemented at metallurgical combines can be made more effective by taking an integrated approach that includes not only the recultivation of slag dumps but also recycling of the slag. Such an approach offers the following benefits to the metallurgical plant: the area of land occupied by dumps is decreased; payments for lease of the land and expenditures on transport of the slag to the dumps are both reduced; the environmental situation is improved in and around the dump; useful components of the slag are recovered and products that are used in other industries are obtained. The cost-effectiveness of recultivating and recycling slag dumps is 2.7 rubles/ruble. © 2011 Springer Science+Business Media, Inc. Source

Korchazhkina O.F.,Mechel | Dyskina B.S.,South Ural State University
Coke and Chemistry | Year: 2014

In the coking of pitch with different softening temperatures, coke particles of different type and structure are added. The coking temperature is 500 and 1200°C. The yield and quality of the pitch coke and compositions obtained are determined. In all cases, the introduction of coke particles is found to increase the yield and change the structure of the coke composition obtained. The microstructure of the composite coke may be regulated by introducing small coke particles of different structure in the high-temperature pitch prior to coking: particles of regular pitch coke increase the proportion of isotropic and finely fibrous structures; particles of acicular coke facilitate the appearance of fibrous and needle structures. © 2014, Allerton Press, Inc. Source

Marsuverskii B.A.,Mechel
Steel in Translation | Year: 2011

A mathematical model is developed for calculating the height and outline of the working space in a blast furnace from the batch surface to the axis of the air tuyere, on the basis of data regarding the density, acceleration of the batch flux, and pressure difference of the gas. The optimal working height of blast furnaces in smelting titanomagnetite sinter and pellets is 10.1-21.8 m. For larger furnace height, relatively immobile refractory batch is formed in the bosh and periodically slips to the hearth, with impairment of the furnace's thermal state. The calculated values obtained provide guidelines in the design and reconstruction of shaft furnaces. © 2011 Allerton Press, Inc. Source

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