Variation of the Size of Molecular Oriented Coke Domains after Gasification
D. I. ALEKSEEV1, A. N. SMIRNOV2, D. A. GORLENKO2
1National University of Science and Technology “MISiS”, Novotroitsk, Russia
2Nosov Magnitogorsk State Technical University, Magnitogorsk, Russia
Keywords: coke, molecular oriented domains, CRI and CSR indexes
Pages: 435-440
Abstract
Prediction of the physical-mechanical properties of metallurgical coke is an essential task from the viewpoint of its efficient application in the blast furnace process, in chemical industry, and also as fuel. The development of this task is the physical substantiation of the formation of coke piece strength. A method based on gasification is proposed to evaluate the size distribution of molecular oriented domains Lс(lamella height) and La(lamella length) indexes. It has been established through the analysis of the structure of large and small domains that large domains are less reactive in comparison with the small ones. For this reason, it is possible to use gasification with carbon dioxide to remove small domains leaving the large domains within the coke pieces. Results of the experiments provide evidence that mainly large domains remain in coke pieces after gasification. The indexes Lс and La were determined to increase approximately by a factor of 1.5 after gasification.
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