THERMODYNAMIC MODELING OF THE INTERACTION OF TECHNOGENIC SILICA FUME WITH BROWN-COAL SEMI-COKE
https://doi.org/10.17073/0368-0797-2015-4-230-234
Abstract
Thermodynamic modeling of high-temperature interactions of microsilica and brown-coal semi-coke was carried out. Calculation of equilibrium structures of Si – O – C and Si – O – C – H systems was defi ned by a “constant” method with the use of the computer modeling program of high-temperature chemical interactions of “PLASMA”. It was established that in both systems the formation process of carbide was dominating. At stoichiometric composition of furnace charge the maximum contents in products of restoration of silicon carbide can be reached at 1700 K, and at 10 % a lack of carbon – 1900 K. The introduction of hydrogen to system doesn’t actually infl uence on the process of carbide formation that is caused by low (less than 0,001 mol) contents in a gas phase at temperatures of carbide formation of hydrocarbons and hydrocarbonic radicals. In Si – O – C system the equilibrium extent of transformation of silicon into carbide doesn’t exceed 0,97, that corresponds to the content of monoxide of silicon in a gas phase of 0,02 mol, owing to what from furnace charge of stoichiometric structure (SiO2 + 3C) it is impossible to receive the single-phase, not containing free carbon, carbide of silicon. It can be avoided using furnace charge with some (~ 10 %) lack of carbon reducer.
About the Authors
A. E. Anikin
Siberian State Industrial University 42, Kirova str., Novokuznetsk, Kemerovo Region, 654007, Russia
Russian Federation
Russian Federation
Senior Lecturer of the Chair “Thermal power and Ecology”
G. V. Galevsky
Siberian State Industrial University 42, Kirova str., Novokuznetsk, Kemerovo Region, 654007, Russia
Russian Federation
Russian Federation
Dr. Sci. (Eng.), Professor, Head of the Chair “Non-ferrous metallurgy and chemical engineering”
V. V. Rudneva
Siberian State Industrial University 42, Kirova str., Novokuznetsk, Kemerovo Region, 654007, Russia
Russian Federation
Russian Federation
Dr. Sci. (Eng.), Professor of the Chair “Nonferrous metallurgy and chemical engineering”
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Review
For citations:
Anikin A.E., Galevsky G.V., Rudneva V.V. THERMODYNAMIC MODELING OF THE INTERACTION OF TECHNOGENIC SILICA FUME WITH BROWN-COAL SEMI-COKE. Izvestiya. Ferrous Metallurgy. 2015;58(4):230-234. (In Russ.) https://doi.org/10.17073/0368-0797-2015-4-230-234
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