Кафедра металургії та організації виробництва (МОВ)
Постійне посилання колекціїhttps://dspace.mipolytech.education/handle/mip/875
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3 результатів
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Документ Study of biomass utilisation in the iron ore sintering(Technical University of Košice, 2019) Kieush, L.; Yaholnyk, M. V.; Boyko, M.; Koveria, A.; Ihnatenko, V.; Ягольник, М. В.Dominating globally and within Ukraine, the blast-furnace practice for iron production requires iron ore sintering preparation wherein the significant amount of fossil fuel is consumed, accompanied by harmful emissions into the environment. Pursuing the purpose to mitigate this negative impact, we address the promising direction of biomass utilisation for a partial replacement of fossil fuels in iron ore sintering. This paper considers the benefits of fossil fuels substitution with biomass, the world practice of biomass utilisation in iron ore sintering and the scope of the biomass energy potential in Ukraine. The study for obtaining sinters with the use of raw biomass fuels (sunflower husk, walnut shell) and charcoal has been carried out via lab-scale sintering pot. The influence of various biomaterials types on the process of iron ore sintering have been investigated and the obtained sinter quality in comparison with the conventional types of the fuels allows establishing the feasibility of replacing 25 % of coke breeze by charcoal or by walnut shell. The sunflower husk application is possible if preliminary preparation of the material for increasing bulk density is assumed to be carried out, for instance, by pressing.Документ Production of iron ore pellets by utilization of sunflower husks(Technical University of Košice, 2021) Kieush, L.; Boyko, M.; Koveria, A.; Yaholnyk, M. V.; Poliakova, N.; Ягольник, М. В.Steel production is the most dynamic industry and one of the key sectors for developing the global economy. The growing iron ore production increases its beneficiation and granulating for subsequent iron and steel production use. As a result, CO2emissions and harmful substances increase, negatively affecting society and the environment. In this regard, it is important to study the use of biomass for the production of iron ore pellets. Lignocellulosic biomass is a renewable and sustainable source of heat and energy that can mitigate climate change. The influences of alternative fuel use on technological indicators of the process and quality ofiron ore pellets have been analyzed. The efficiency of using 40.4-60.7 vol.% of sunflower husks on the combined machine “straight grate -rotary kiln -annular cooler” to partially replace natural gas in iron ore pellets production under industrial conditions has been studied. It was found that the combustion of sunflower husks generates enough heat (19.31 MJ kg−1) to obtain iron ore pellets with good strength. After evaluating the parameters of the combined machine and the quality of the resulting pellets, it was determined that it would be rational to replace up to 48.3 vol.% of natural gas with crushed sunflower husks.Документ Influence of biocoke on iron ore sintering performance and strength properties of sinter(Національний гірничий університет, 2022) Kieush, L.; Hrubiak, A.; Koveria, A.; Boyko, M.; Yaholnyk, M. V.; Molchanov, L.; Moklyak, V.; Ягольник, М. В.The research purpose is to substantiate the use of biocoke as a fuel in the iron ore sintering, as well as its influence on the performance and properties of the resulting sinter. To completely replace conventional coke breeze, biocoke is produced using 5wt.%biomass wood pellets at different carbonization temperatures of 950 or 1100°C. Further, the influenceof biocoke on the sintering process and the sinter quality is studied at a high proportionof biomass pellets of 10, 15, 30, 45 wt.%and a carbonization temperature of 950°C.