http://ea.donntu.ru/handle/123456789/30693 2016 г. Sun, 19 Apr 2026 21:25:41 GMT 2026-04-19T21:25:41Z http://ea.donntu.ru/handle/123456789/30702 Title: К 85-летию кафедры «Механическое оборудование заводов черной металлургии» Authors: Еронько, С. П. Description: Статья посвящена истории кафедры "Механическое оборудование заводов черной металлургии" Fri, 01 Jan 2016 00:00:00 GMT http://ea.donntu.ru/handle/123456789/30702 2016-01-01T00:00:00Z http://ea.donntu.ru/handle/123456789/30701 Title: Применение хромоникелевого покрытия на узких стенках кристаллизаторов МНЛЗ Authors: Герасимова, А.А.; Радюк, А.Г.; Титлянов, А.Е. Abstract: Проведены исследования по повышению срока службы кристаллизаторов машин непрерывного литья заготовок (МНЛЗ) на их узких стенках из меди М1 перед последним ремонтом путем создания жаростойкого износостойкого слоя напыления хромоникелевого покрытия. Целью работы является исследование структуры покрытия, состава фаз, твердости и микротвердости поверхностных слоев хромоникелевого газотермического покрытия и на основании полученных результатов оценка возможности нанесения такого покрытия на рабочую поверхность узких стенок толстостенных кристаллизаторов МНЛЗ для повышения их стойкости. Fri, 01 Jan 2016 00:00:00 GMT http://ea.donntu.ru/handle/123456789/30701 2016-01-01T00:00:00Z http://ea.donntu.ru/handle/123456789/30700 Title: Состояние и перспективы применения ПУТ в доменных цехах металлургических предприятий Украины Authors: Мищенко, И.М.; Асламова, Я.Ю.; Mishchenko, I.M.; Aslamova, Y.Y. Abstract: Выполнен краткий анализ показателей выплавки чугуна с применением пылеугольного топлива в четырех доменных цехах металлургических предприятий Украины. Обоснована необходимость первоочередного повышения качества кокса – одного из важнейших факторов комплексной компенсации негативных температурно-тепловых и газодинамических изменений доменного процесса, обусловленных применением пылеугольного топлива. Description: Background. Ensuring the competitiveness of steel productsis possible due to decrease in specific consumption of metallurgical coke by replacing it with pulverized coal fuel (PCF). Development of technology of blast smelting with the use of PCF is relevant to metallurgical enterprises. The objective of this work is the analysis and generalization of results of PCF injection technology, identifying factors to improve its efficiency, with particular attention paid to improving the quality of coke. Materials and/or methods.The task was solved by the method of tactical analysis. The application of this method of research allowed detailing the overall situation of the PCF use and identifying key factors of improving the effectiveness of this technology at metallurgical enterprises of Ukraine. Results. In the course of the study it is found that blast furnace workshops of four metallurgical enterprises of Ukraine with a production capacity of morethan 14 million tons/year are developing a technology of using pulverized coal in the amount of 142.3-172 kg/t of pig iron while reducing specific consumption of coke to 378.8-381 kg/t. In the blast furnace shop of PJSC "Donetsksteel" – Metallurgical Plant" it was possible to increase the effectiveness of PCF injection technology by improving the quality of coke ("Premium" mark), the quality of ironstone part of the charge, the optimization of blast-furnace smelting parameters with the exception of natural gas from the combined air blast composition. In the blast furnace shop of PJSC "Alchevsk Iron and Steel Works" to improve the efficiency of the PCF injection the complex of pulverized coal injection is created, and the quality of coke is improved due to coking of tamped coal charge. In the blast furnace shop of PJSC "Zaporizhstal" PCF flow is 151 kg/t, specific consumption of coke up to381 kg/t of pig iron, which is one of the best achievements in Ukraine In the blast furnace shop of PJSC "Ilyich Steel and Iron Works" (Mariupol) PCF flow is 136.7-154.4 kg/t and specific consumption of coke is 378.8-395.4 kg/t of pig iron. The necessary dynamic conditions for pulverized coalinjection are created at the enterprise. Conclusion. Improving the efficiency of PCF injection ispossible by improving coke quality and the use of other compensatory factors. To increase the flow of pulverized coal in the conditions of Ukrainian enterprises up to 180-200 kg/t it is necessary to: further improve the quality indicators of the components of the BF charge; increase the blast temperature up to 1150-1200 °C, increase the degree of its oxygen enrichment to 25-30%; prepare coke byits fractional composition before loading into the blast furnace; increase the pressure of furnace top gases in blast furnaces to 0.15-0.2 MPa; ensure uniform PCF distribution on the tuyeres. Fri, 01 Jan 2016 00:00:00 GMT http://ea.donntu.ru/handle/123456789/30700 2016-01-01T00:00:00Z http://ea.donntu.ru/handle/123456789/30699 Title: Конструктивные и энергосиловые параметры манипулятора для замены погружного стакана машины непрерывного литья заготовок Authors: Еронько, Сергей Петрович; Ошовская, Елена Владимировна; Ткачев Михаил Юрьевич; Eron’ko, S. P.; Oshovskaya, E. V.; Tkachev, M. Yu. Abstract: Рассмотрен расчетно-аналитический метод определения конструктивных и энергосиловых параметров импортозамещающей конструкции манипулятора для замены погружного стакана без прерывания разливки на слябовой машине непрерывного литья заготовок, позволяющий минимизировать временные затраты на этапе конструирования машины. Description: Background. Systems for a quick replacement of refractory submerged nozzles of slab continuous casting machines (CCM) belong to original equipment. The lack of complete, accurate information in scientific and technical sources regarding the calculation methods ofpower parameters of these systems complicates and makes impossible the development of reliable, competitive domestic slab CCM tundish and serving manipulators. Therefore, the development of the design principles of the newly developed systems for a quick change of submerged nozzles is an actual scientific and technical task, especially in the implementation of import substitution programs in the heavy engineering industry. Materials and/or methods. The analytical study of structural and power parameters of the manipulator for a quick replacement of refractory submerged nozzles is madewith the use of fundamental provisions of theoretical mechanics and theory of mechanisms and machines. For power calculation of the manipulation system, the d'Alembert principle isapplied. To calculate the kinematic parameters of the removal mechanism for a worn-out nozzle, comprising a planetary gear, the Willis method is used. Results. The dependencies are revealed for determination of drive parameters of the main mechanisms manipulating spare and worn-out submerged nozzles. Kinematic and power calculations of the structural schemes of the main assemblies are made. The developed calculation method for constructive and power parameters of the manipulator for submerged nozzle replacement on the slab continuous casting machine allows to substantiate and appointthe rational drive characteristics of the mechanisms of feeding the spare and removal of worn-out submerged nozzles, as well as reduce time costs at the stage of designing of the whole machine. Conclusion. The analytical dependencies obtained for the original design of the manipulator allow filling the gap in the domestic methodology of designing non-standard metallurgical equipment when implementing the import substitution programs, and their use in the process of machine operation will allow for a causal analysis of the variation of its reliability indicators. The proposed structural scheme of the manipulator provides a complete mechanization and automation of the operation of changing submerged nozzles avoiding even short-term cessation of continuouscasting in the slab CCM. Fri, 01 Jan 2016 00:00:00 GMT http://ea.donntu.ru/handle/123456789/30699 2016-01-01T00:00:00Z