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Діагностика та управління доменною плавкою в змінних паливно-сировинних умовах

Authors:
  • Iron and Steel Institute of Ukraine, Ukraine, Dnipro
  • Iron and Steel Institute, National Academy of Sciences of Ukraine

Abstract

У книзі представлено результати досліджень на доменній печі, обладнаній сучасним безконусним завантажувальним пристроєм, після її реконструкції, а саме: дослідження перед задувкою печі, особливості вибору задувочної шихти, налаштування параметрів роботи завантажувального пристрою. Представлено результати створення та реалізації модельної системи для підтримки прийняття рішень по вибору і коригуванню програм завантаження, використання модельної системи націлене також на навчання технологічного персоналу в умовах освоєння нового завантажувального пристрою. Розроблено та реалізовано новий підхід до вибору енергоефективних режимів завантаження при використанні багатокомпонентної шихти змінної якості, а також в перехідних дуттєвих режимах і в умовах відсутності природного газу і пиловугільного палива при роботі печі зі збільшеною кількістю водяної пари в дутті. Використання представлених у книзі режимів завантаження при освоєнні пиловугільного палива дозволили забезпечити експлуатаційну стійкість системи охолодження і безаварійну роботу досліджуваної доменної печі. Представлено результати досліджень по використанню інформації засобів контролю розподілу температур газів у колошниковому просторі для прийняття обґрунтованих рішень з управління завантаженням печі шихтовими матеріалами. Представлено результати досліджень впливу технологічних факторів на характер зміни температур футерівки по висоті печі протягом п'яти років її експлуатації в різних технологічних умовах, з визначенням граничних значень температур, що дозволяють діагностувати стан футерівки: її знос, або формування захисного гарнісажу. У книзі представлені результати задувок доменних печей після їх тривалої зупинки із застосуванням нових удосконалених підходів, які дозволили безаварійно вивести печі на робочі показники. Для вчених-металургів і широкого кола інженерно-технічних працівників металургійної промисловості, аспірантів, докторантів, а також викладачів і студентів металургійних ВНЗ. The book presents the results of research on the blast furnace, equipped with a modern bell-less top, after its reconstruction, namely: studies before the furnace blowing, features of the selection of the inlet charge, setting the parameters of the BLT. The results of the creation and implementation of a model system to support decision-making on the selection and adjustment of charging programs are presented, the use of a model system is also aimed at training technological personnel in terms of mastering a new BLT. A new approach to the selection of energy-efficient charging modes using a multicomponent charge of varying quality, as well as in transitional blast regimes and in the absence of natural gas and pulverized coal during operation of the furnace with an increased amount of steam in the blast, has been developed and implemented. The use of the charging modes presented in the book during the development of pulverized coal allowed to ensure the operational durability of the cooling system and trouble-free operation of the investigated blast furnace. The results of research on the use of information from the means of controlling the temperature distribution of gases in the top furnace space for making informed decisions on the management of the furnace charging with raw materials are presented. The results of studies of the influence of technological factors on the nature of the change in lining temperature along the height of the furnace during five years of its operation in various technological conditions, with the determination of temperature limits, which allow to diagnose the condition of the lining: its wear, or the formation of protective skull are presented. The book presents the results of blasting of blast furnaces after their long shutdown with the use of new improved approaches, which allowed trouble-free to bring the furnace to work performance. For scientists, metallurgists and a wide range of engineering and technical workers of the metallurgical industry, graduate students, doctoral students, as well as teachers and students of metallurgical universities.
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... При этом снижается температура плавления шихты, улучшается подвижность промежуточных шлаков в нижней части шахты и распаре ДП, происходит сжигание углеродистого мусора в горне за счет восстановления MnO твердым углеродом, улучшается подвижность и серопоглатительная способность конечных доменных шлаков. Проведенные ранее в ИЧМ лабораторные испытания показали, что ввод частично сгоревшего пылеугольного топлива от 4 до 7 % от массы шлакового расплава увеличивает вязкость промежуточных шлаков на 8-15 %, [10,11]. В то же время, несмотря на увеличение гетерогенности конечного доменного шлака, увеличение его вязкости меньше, чем промежуточных шлаков. ...
... 1. Химический состав марганецсодержащих материалов, используемых на ЕМЗ и ДМК промывки горна от кокса мелких фракций и, как следствие, стабилизации нагрева чугуна, доля перехода марганца в чугун при этом составила ~0,47±0,03[11,15]. кг/т чугуна на начальном этапе использования марганецсодержащих материалов до 13,3 кг/т чугуна в последующих периодах. ...
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The experience of using manganese-containing materials in the charge in blast furnace smelting at Yenakiieve Iron and Steel Works and the Dneprovsky Iron & Steel Integrated Works is presented, which has one of the greatest washing effects when they are rationally formed in the feed cycle and contributes to maintaining the technological stability of the blast furnace in conditions of low and unstable quality of burden materials and when injecting pulverized coal. It is proposed to use briquettes obtained on roller presses from ferroalloy production wastes as an alternative type of manganese-containing washing material, characterized by high quality indicators that meet the requirements for metallurgical raw materials.
... After furnace startup, the shafts were gunited in October 2009, June 2011, and November 2013, before the research began. At the beginning of 2016, pulverized coal injection was introduced at blast furnace 5, which returned to operation in October 2009 after major repair of its first level [6][7][8][9][10][11][12]. In planned maintenance of blast furnace 5, before the introduction of pulverized coal injection, thermocouples measuring the temperature of the cooling plates were restored and connected to the database of the plant's automatic control system. ...
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