Regulation of Removal Process of Non-Metallic Inclusions at Secondary Treatment of Melt

Володимир Святославович Богушевський, Марина Володимирівна Горбачова

Abstract


Background. When secondary refining with inert gases, blowing intensity of metal is generally maintained at a constant level and limited by the level of metal in the ladle. Recent studies show that the blowing intensity effect to remove impurities of different size, so there is the problem of regulating this process.

Objective. The aim of the investigation is to research the process of removing non-metallic inclusions from the metal in the ladle by blowing an inert gas in order to increase the efficiency of removing impurities and preventing the emission of metal from the ladle when blowing.

Methods. The regulation of removing non-metallic inclusions from steel by changing the blowing intensity in ladle is described. The structural scheme of regulation circuit to control the process of purging the metal in the ladle is created. An example of regulation of removing non-metallic inclusions from steel in the 160-ton ladle has been given.

Results. Changing the blowing intensity, giving it a fluctuating nature, in which the maximum intensity is the minimum size of nonmetallic inclusions to be removed and the minimum - maximum possible size of inclusions and frequency - a free ladle capacity, increased efficiency removal of inclusions has been established.

Conclusions. It is shown that the determination of probability size of inclusions and free volume of the ladle to regulate the blowing intensity of metal, improve mixing of metal in the ladle warning metal emissions and ensure complete removal of non-metallic inclusions of various sizes.


Keywords


Blowing intensity; Ladle; Non-metallic inclusions

References


D.F. Chernega et al., Fundamentals of Metallurgical Production of Metals and Alloys. Kyiv, Ukraine: Vyshcha Shkola, 2006, 503 p. (in Ukrainian).

B.M. Boichenko, Converter Steel Production: Theory, Technology, Quality Steel, Construction Aggregates, Recycling Materials and Ecology. Dnipropetrovsk, Ukraine: RVA “Dnipro-VAL”, 2004, 454 p. (in Ukrainian).

S.A. Nelipa, “Study of purging process of steel in the ladle”, Sbornik Thudov Magistrov DonNTU, is. 1, pp. 719–725, 2002 (in Russian).

V.M. Danchenko et al., Theory of Metal Forming Processes. Dnipropetrovsk, Ukraine: Porogy, 2008, 370 p. (in Ukrainian).

N.A. Kozyrev et al., “The new technology of production rail steel”, Izvestiya Vuzov. Chernaya Metallurgiya, no. 2, pp. 25–29, 2012 (in Russian).

E.V. Protopopov et al., “Investigation of influence parameters of secondary refining on foundation of oxide non-metallic inclusions in rail steel”, in Proc. XIII Int. Congress of Steelworkers, Moscow-Polevskoy, Russia, 2014, pp. 180–183 (in Russian).

A.M. Pogodin et al., “Mathematical model of removing non-metallic inclusions of metal on the ladle furnace”, in Proc. XIII Int. Congress of Steelworkers, Moscow-Polevskoy, Russia, 2014, pp. 184–187 (in Russian).

V.S. Bogushevsky and S.V. Zhuk, “Heat loss as components of the converter dynamic control model of temperature”, Naukovi Notatki. Mizhvuzivskiy Zbirnyk, no. 38, pp. 6–9, 2012 (in Ukrainian).


GOST Style Citations


  1. Основи металургійного виробництва металів і сплавів / Д.Ф. Чернега, В.С. Богушевський, Ю. Я. Готвянський та ін.; за ред. Д.Ф. Чернеги, Ю.Я. Готвянського. – К.: Вища школа, 2006. – 503 с.
     
  2. Бойченко Б.М., Охотський В.Б., Харлашин П.С. Конвертерне виробництво сталі: теорія, технологія, якість сталі, конструкція агрегатів, рециркуляція матеріалів і екологія. – Дніпропетровськ: РВА “Дніпро-ВАЛ”, 2004. – 454 с.
     
  3. Нелипа С.А. Исследование процесса продувки стали в ковше // Сб. трудов магистров ДонНТУ. – 2002. – Вып. 1. – C. 719–725.

  4. Данченко В.М., Гринкевич В.О., Головко О.М. Теорія процесів обробки металів тиском. – Дніпропетровськ: Пороги, 2008. – 370 с.
     
  5. Новая технология производства рельсовой стали / Н.А. Козырев, Е.В. Протопопов, Р.С. Айзатулов, Д.В. Бойков // Известия вузов. Черная металлургия. – 2012. – № 2. – С. 25–29.
     
  6. Исследование влияния параметров внепечной обработки на образование оксидных неметаллических включений в рельсовой электростали / Е.В. Протопопов, Н.А. Козырев, А.А. Уманский, Д.В. Бойков // XIII Международный конгресс сталеплавильщиков, 12–18 октября 2014, Москва-Полевской. – Москва-Полевской, 2014. – С. 180–183.
     
  7. Математическая модель удаления неметаллических включений из металла на агрегате ковш-печь / А.М. Погодин, К.В. Григорович, О.А. Комолова // XIII Международный конгресс сталеплавильщиков, 12–18 октября 2014, Москва-Полевской. – Москва-Полевской, 2014. – С. 184–187.
     
  8. Богушевський В.С., Жук С.В. Теплові втрати конвертера як складові динамічної моделі контролю температурного режиму // Наукові нотатки. Міжвузівський збірник. – Луцьк, 2012. – № 38. – С. 6–9.




DOI: https://doi.org/10.20535/1810-0546.2015.6.72717

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