Yaroslavl State Technical University (Yaroslavl, Russia):

V. A. Ivanova, Dr. Eng., Associate Prof., Head of the Chair “Technology of materials, standardization and metrology”, e-mail: ivanova-waleriya@mail.ru
E. O. Pobegalova, Senior Lecturer, e-mail: pobegalovaeo@gmail.com

Foundry coke is a fuel in production of cast iron in cupola furnaces. Despite the fact that, as a rule, the supplied foundry coke meets the requirements of GOST 3340–88, consumers are not satisfied with its quality. Moreover, there is some ambiguity in the use of “property” and “parameter” conceptions. In this regard, the concept of establishing requirements for the quality of foundry coke using standardization methods has been proposed. In the framework of this concept, at the first stage, it is planned to streamline the terms and their defi nitions in the field of foundry coke, as well as systematize its properties and parameters. The systematization of properties consists in their reasonable classification. To classify the properties and parameters of foundry coke, a hierarchical classification method was used, according to which simple and complex properties of the object were distinguished. The main classification feature is the nature of the properties manifestation. Enlarged groups of complex properties, which include physical, chemical and physical-chemical properties, are at the upper levels of the hierarchical structure. Physical properties include gas permeability, humidity, fracture, density, porosity. In turn, bulk density and bulk weight, particle size distribution and its uniformity, average piece size, porosity, hydraulic criterion and hydraulic resistance are parameters characterizing gas permeability. If one considers physical properties as the specific behavior of the body under the influence of certain forces and fields, then this group can include mechanical, thermal and electromagnetic properties. The mechanical properties of foundry coke include hardness and strength, which are a complex property. Depending on the nature of the load acting on foundry coke during the testing process, we can distinguish: strength under complex loading, strength under dynamic loads, and high-temperature strength. The thermal properties of foundry coke include thermal conductivity and heat resistance, and electromagnetic properties include electrical resistance. Further selection of properties and parameters will allow establishing a list of quality indicators of foundry coke, as well as optimizing the values of these indicators.
Tsindrakova T. V., Kalabin S. V., Komelskikh S. G. (JSC Pervouralsk New Tube (Novotrubny) Works) took part in the work.

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