Nesterov Alexander Stanislavovich, PhD (Engin.), Senior Researcher, Head of Department; Iron and Steel Institute named after Z.I. Nekrasov of the NAS of Ukraine, Academican Starodubova square, 1, Dnipro, Ukraine, 49107; e-mail: asn.dnepr@ gmail.com; ORSID0000-0002-0183-0327
Garmash Larysa Ivanivna, PhD (Engin.), Research Scientist, Iron and Steel Institute named after Z.I. Nekrasovof the NAS of Ukraine, Academican Starodubova square, 1, Dnipro, Ukraine, 49107; e-mail:larysagar@gmail.com; ORSID 0000-0002-9540-3037

 

Increasing the efficiency of the domain smelting by the improvement of the
quality of rail materials

Summary. .It is noted in the work that when mastering the technology of
pulverized coal injection (PUT) at the metallurgical enterprises of Ukraine, it is
necessary to intensify work, including research, in the direction of improving
the quality characteristics of the sinter, the stability of its chemical composition
and strength parameters. The analysis of the quality of iron ore raw materials
used in sintering production in Ukraine and foreign countries is carried out. The
requirements of international and domestic standards for the quality of raw
materials and fuels, providing for the injection of large quantities of firearms
into the furnace, are given. A methodology for determining the quality of raw
materials developed in the HMI is described. The results of a study of the
quality of iron ore raw materials according to the developed method are
presented. Based on the analysis of the results of the research, requirements
were developed for the quality of granular iron ore wastes and their rational
amount in the composition of the sinter charge, and the process for the
production of granules was developed. Recommendations have been developed
on the use in the sinter mixture of a part of the granular components of
secondary waste, which allowed to increase the content of secondary resources
in the mixture. As a result, the chemical composition of the sinter was
stabilized, its strength was improved, the yield of sinter of the second grade was
reduced, the removal of blast furnace dust and coke consumption were reduced.
Improving the quality of the sinter and the rational distribution of charge
materials over the cross-section of the top of the blast furnace allows for selfrenewal of the protective skull, to reduce the removal of top dust by 4.3 kg / t of
cast iron, and to reduce coke consumption by 19.6 kg / t of cast iron. The
developed measures make it possible to increase the competitiveness of
44
«Фундаментальні та прикладні проблеми чорної металургії. – 2019. – Вып.33
«Fundamental and applied problems of ferrous metallurgy». – 2019. – Collection 33
ISSN 2522-9117 «Fundamental’nye i prikladnye problemy černoj metallurgii». – 2019. – Vypusk 33
products, even at the additional cost of preparing the sinter mixture for
sintering.
Keywords: blast furnace, quality of iron ore raw materials, research
methodology, agglomerate, secondary iron ore raw materials, granulation,
sintering
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