Конференції-2021

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http://crust.ust.edu.ua/handle/123456789/13312
UKR: Матеріали конференцій, що відбулися 2021 року
ENG: Proceedings of conferences held in 2021.(en.)

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Browsing Конференції-2021 by Author "Stupak, Yurii O."

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    Features of Using the Distance Learning Model
    (Ukrainian State University of Science and Technologies; Aalto University Helsinki, Finland, 2021) Shvachych, Gennady G.; Khokhlova, Tetiana S.; Stupak, Yurii O.; Moroz, Boris; Kabak, Leonid
    ENG: Purpose. To analyze models of distance learning (DL) that have been implemented in the world and have shown effectiveness in order to determine promising directions for the development of DL: testing, educational research, contextual learning, mobile learning, development of social networks, application of mobile educational games, implementation of mobile voice content with interactive assessment etc. Methodology. Literature review of open access information sources. Findings. It has been determined that special attention should be paid to the technologies of educational institutions, in which it is possible to involve highly qualified teachers in reading lectures; there is a significant saving of teachers' time; there is a possibility of increasing the amount of material presented within the budget allocated for regular classroom activities in the curriculum. Originality. It consists in a certain set of criteria, based on the analysis, which are necessary and sufficient to achieve the final goal. Practical value. The methods of selection of educational tools make it possible to increase the effectiveness of the educational process, make it attractive and exciting for students and motivate them to an active educational process always and everywhere, which allows students to receive a quality education.
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    The Use of X-Ray Research Methods to Clarify the Degree of Pulverized Coal Particles Thermal Destruction during Combustion under Conditions of It Injection into a Blast Furnace
    (National Metallurgical Academy of Ukraine, Dnipro; Technical University of Varna, Bulgaria, 2021) Stupak, Yurii O.
    ENG: Purpose. To show one of the ways of using X-ray research methods to find out the degree of thermal destruction of pulverized coal particles during combustion under the conditions of blowing them into a blast furnace, as well as the effectiveness and informativeness of the proposed method. Methodology. A common method of X-ray structural analysis or X-ray diffraction (XRD) is applied, which allows to calculate structural parameters (interplanar distance and size of crystallites) of carbon materials directly from their diffraction patterns, which determine their structure. The diffractogram for pure graphite is used as a reference for comparison, comparing the reflections for the principal planes (hkl) - 002, 100, 101 and 004. Findings. A qualitative comparison of the obtained X-ray diffractograms showed that the addition of gaseous coal and peat to pulverized coal dust from lean coal affects the process of its combustion, but the nature of the action of these additives is different. For the burned lean coal and the burned mixture of lean coal with gas coal, the shape (width at half maximum) and the location of the characteristic maxima on the radiograph practically coincide. For the sample burned with the addition of peat, the half-width of the main maximum and the intensity of the maxima in the region of far corners differ from those for coal burned with and without the addition of gas coal. Originality. It consists in combining the laboratory method of modeling the combustion of pulverized coal particles in a blast furnace based on the laboratory "drop furnace" (drop furnace) with the proposed method. Practical value. It is shown the possibility of using the X-ray diffraction method in combination with other research methods in the evaluation (selection) of pulverized coal fuel and its additives for blowing into a blast furnace in order to achieve the best results in terms of the degree of combustion. and equivalent replacement of coke.
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