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ArticleName Improvement of blast furnace practice due to creation of the conditions for elevation of natural gas consumption via usage of raw materials with increased strength
ArticleAuthor S. K. Sibagatullin, A. S. Kharchenko, V. P. Chernov, V. A. Beginyuk

Magnitogorsk State Technical University named after G. I. Nosov (Magnitogorsk, Russia):

Sibagatullin S. K., Dr. Eng., Prof., Chair of Metallurgy and Casting Processes
Kharchenko A. S., Cand. Eng., Associate Prof., Chair of Metallurgy and Casting Processes
Chernov V. P., Dr. Eng., Prof., Chair of Metallurgy and Casting Processes

E-mail (common):


Magnitogorsk Iron and Steel Works (Magnitogorsk, Russia):

Beginyuk V. A., Leading Specialist of Technological Group, Blast Furnace Shop


Relationship between hot strength of pellets and natural gas consumption has been examined at the blast furnace No. 10 of Magnitogorsk Iron ans Steel Works. This blast furnace was operated with upper limiting area in gas dynamics, and the pellets have been supplied by Mikhailovskiy and Sokolovsko-Sarbaiskiy mining and concentrating works. Variation of gas dynamic conditions, intensity of blowing, gas and charge materials has been evaluated. Iron reduction process, burning area state and zonal thermal work in the furnace have been studied. It is shown that joint increase of hot strength of the iron ore part of charge materials by 1% has improved blast furnace operating parameters without any complications of gas dynamics procedure in its upper part. It was accompanied by increase of hydrogen usage degree by 1.66%, Fe reduction degree (from FeO) by hydrogen by 1.91%, correlation of H2 and CO usage degrees by 1.46%, correlation between the values of heat conductivity of charge and gas flows in the furnace bottom by 0.23% (with its decrease in the furnace top by 0.39%) and lowering of summarized heat consumption for all technological processes in the decisive area by 0.85%. The ratio of coke replacement by natural gas made 0.7 kg/m3.

keywords Blast furnace, coke, sinter, pellets, productivity, hot strength, natural gas, gas dynamics, thermal work, reduction, dust emission

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