Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/103192
Title: Analysis of possible ways to reduce sulfur content in pig iron
Анализ возможных путей снижения содержания серы в чугуне
Authors: Myasoedov, S. V.
Filatov, S. V.
Panteleev, V. V.
Listopadov, V. S.
Zagainov, S. A.
Issue Date: 2021
Publisher: National University of Science and Technology MISIS
Citation: Analysis of possible ways to reduce sulfur content in pig iron / S. V. Myasoedov, S. V. Filatov, V. V. Panteleev, et al. — DOI 10.17073/0368-0797-2020-11-12-878-882 // Izvestiya Ferrous Metallurgy. — 2021. — Vol. 63. — Iss. 11-12. — P. 878-882.
Abstract: One of the ways to increase the energy efficiency and intensity of blast furnace smelting, especially when using pulverized coal fuel, is to increase the hot strength of coke. In the conditions of OJSC NLMK, an oil additive was introduced into the coal charge to improve the coke quality. At the same time, sulfur content in the coke increases, and, consequently, sulfur content in the cast iron increases as well. In this regard, the task of finding ways to improve the desulfurization of cast iron in blast furnace becomes urgent. The main factors determining the desulfurization of cast iron are slag basicity, content of MgO oxide in it, temperature of the smelting products, and the slag viscosity. The purpose of this work was to compare the efficiency of sulfur removal by increasing the slag basicity and MgO content. On the basis of well-known equations, an algorithm was developed that allows the problem to be solved. It was established that an increase in MgO content in the slag promotes desulfurization of cast iron to a greater extent than a basicity increase. In addition, an increase in MgO content by 1 % is accompanied by an increase in slag yield by 3.0 – 3.5 kg/t of cast iron. At the same time, an increase in basicity by 0.01 leads to an increase in the slag yield by 4 – 5 kg/t of pig iron. Consequently, reducing the sulfur content in pig iron by increasing the slag basicity requires less heat. In terms of the specific consumption of coke, difference in heat demand is 0.4 – 0.5 kg/t of pig iron. It is shown that with an increase in MgO content in the slag, the slag viscosity at a temperature of 1450 °C increases to a lesser extent than with an increase in basicity. © 2020 National University of Science and Technology MISIS. All rights reserved.
Keywords: COKE QUALITY
PIG IRON DESULFURIZATION
PIG IRON PRODUCTION
SLAG COMPOSITION
SLAG VISCOSITY
SULFUR CONTENT IN PIG IRON
SULFUR DISTRIBUTION COEFFICIENT
URI: http://hdl.handle.net/10995/103192
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85098662805
PURE ID: 20375826
91c70cef-792d-471f-abf6-27b1409744f8
ISSN: 3680797
DOI: 10.17073/0368-0797-2020-11-12-878-882
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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