Analysis of the Possible Ways to Reduce Sulfur Content in Pig Iron

Autor: V. V. Panteleev, V. S. Listopadov, S. V. Myasoedov, S. V. Filatov, S. A. Zagainov
Rok vydání: 2020
Předmět:
Pig iron
PIG IRON DESULFURATION
0211 other engineering and technologies
02 engineering and technology
STRENGTH PERFORMANCE
COAL
chemistry.chemical_compound
General Materials Science
021102 mining & metallurgy
QUALITY OF COKE
SLAGS
Slag
Coke
OXIDE MINERALS
SULFUR DISTRIBUTION FACTOR
Flue-gas desulfurization
DESULFURIZATION RATE
SULFUR CONTENTS
0205 materials engineering
visual_art
Smelting
visual_art.visual_art_medium
SMELTING PRODUCTS
COKE
MAGNESIA
SLAG COMPOSITION
PIG IRON
Blast furnace
Materials science
BLAST FURNACES
Oxide
SULFUR
engineering.material
DESULFURIZATION EFFICIENCY
COKE CONSUMPTION
BLAST-FURNACE SMELTING
Coal
PULVERIZED COALS
DESULFURIZATION
business.industry
020502 materials
Metallurgy
SLAG VISCOSITY
PULVERIZED FUEL
PETROLEUM ADDITIVES
chemistry
SULFUR CONTENT IN PIG IRON
engineering
PRODUCTION OF PIG IRON
business
VISCOSITY
SMELTING
Zdroj: Steel Transl.
Steel in Translation
ISSN: 1935-0988
0967-0912
DOI: 10.3103/s0967091220120104
Popis: —: With an approach to improve the strength performance and rate of blast-furnace smelting, especially when pulverized coal fuel is involved, the improvement of the hot coke strength has been considered. A crude oil additive is introduced into the coal charge in PJSC Novolipetsk steel mill (NLMK) to improve the quality of coke. This brings about an increase in coke sulfur resulting in the sulfur content growth in pig iron. Therefore, the task of finding ways to improve pig iron desulfurization in the blast furnace becomes important. The following are key factors that affect the pig iron desulfurization rate: slag basicity, the content of MgO oxide in the slag, the temperature of smelting products, and the slag viscosity. The purpose of this work deals with comparing the desulfurization efficiency through the improvement of the slag basicity and increasing the MgO content. An algorithm is developed based on known equations in order to achieve this goal. The increase of MgO content in the slag provides better input into pig iron desulfurization than the increase in slag basicity. In addition, an increase in MgO content by 1% results in growing slag to pig iron ratio amounting to 3.0 to 3.5 kg/MT. At the same time, an increase in basicity by 0.01 leads to an increase in the slag to pig iron ratio 4 to 5 kg/MT. Consequently, reducing the sulfur content in pig iron by controlling the slag basicity is less heat intensive. Recalculating to the reduced coke consumption rate, the difference in heat demand amounts to 0.4 to 0.5 kg/MT of pig iron. It is shown that the slag viscosity increases to a lesser extent than when caused by a basicity increase when MgO content grows in slag at a temperature of 1450°С. © 2020, Allerton Press, Inc.
Databáze: OpenAIRE
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