DOI: 10.52150/2522-9117-2019-33-61-77

Semenov Yuri Stanislavovich. – –Ph.D. (Engin.), Senior Researcher, Institute named after Z.I. Nekrasov of the NAS of Ukraine, Academican Starodubova square, 1, Dnipro, Ukraine, 49107; e-mail: yuriy.semenov.isi@gmail.com, ORCID 0000-0003-2299-5742
Shumelchik Evgeny Igorevich, Ph.D. (Engin.), Senior Researcher, Iron and Steel Institute named after Z.I. Nekrasovof the NAS of Ukraine, Academican Starodubova square, 1,Dnipro, Ukraine,49107; e-mail: shei@ua.fm, ORCID 0000-0001-5350-6425
Horupakha Victor Vladimirovich, Researcher, Iron and Steel Institutenamedafter Z.I. Nekrasovofthe NAS ofUkraine, Academican Starodubova square, 1, Dnipro, Ukraine, 49107; e-mail:
viktor.horupakha@gmail.com, ORCID 0000-0003-0531-1871, Z.I. Nekrasov Iron & Steel Institute of the NASs of Ukraine, Dnipro

DEVELOPMENT AND IMPLEMENTATION OF THE NEW APPROACHES TO DIAGNOSTICS AND MANAGEMENT OF THE BLAST FURNACE SMELTING

Summary. The article presents a brief description of the results of blast furnace production research carried out at the Yenakiieve Iron & Steel Works and the Dneprovsky Iron & Steel Integrated Works in 2011–2019. For the conditions of transition modes of blast furnace to ensure its stability in changing the qualitative and quantitative composition of the components of the charge materials, as well as in the change of fuel additives in the blast, the complex use of information of modern means of automated control is proved: stationary thermosets and thermocouples to the lining. New approaches to the choice of rational charging programs using the principle of variable maximum ore loading along the radius of the furnace within the charging cycle for working conditions on a charge of low quality have been developed. The implementation of such a charging program over the next three years has allowed to ensure a stable and economical course of melting, and its adaptation to the technology of using pulverized coal has allowed to reduce the gas flow
temperature of the peripheral zone throughout the height of the blast furnace, as well as to preserve the cooling system during the development of lining-free. Expert module of adjustment of the program of charging using the established rational ranges of change of temperature indices of gas flow distribution along the radius of the furnace under different technological conditions of blast furnace has been developed and implemented on three blast furnaces. The method of reasonable choice of location of closed air tuyeres or air tuyeres of different diameter was developed and tested using information on change of lining temperatures on height and circumference of blast furnace. The method of equalizing the raceway adiabatic flame temperature around the blast furnace circumference by creating a non-uniform flow rate of pulverized coal in the air tuyeres has been improved and implemented. The basic technological
requirements for blast furnace blasting after its long stop without release of “gantry” cast iron and scraping of materials from the furnace, the use of which before and in the blast furnace blasting of the Yenakiieve Iron & Steel Works and the Dneprovsky Iron & Steel Integrated Works after a long-lasting set-up were developed economic indicators, while ensuring the preservation of refractory lining, structures and equipment.
Keywords: blast furnace, charging program, BLT, temperature probe, the quality of coke, pellet content in the charge, lining, blowing of a blast furnace.

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