CARBIDIZATION OF TECHNOGENIC MICROSILICA BY BROWN-COAL SEMI-COKE
https://doi.org/10.17073/0368-0797-2016-2-105-111
Abstract
The paper presents the researches at the temperatures of 1873, 1923, 1973 К and duration of 5 – 30 min of carbidization of briquetted monocharges, consisting of microsilica, formed at the production of silicon and its alloys and diff erent carbon deoxidizers: brown coal and coal-mine semi-cokes, coke fi nes and coke dust. It has been established that the highest indicators are reached at carbidization with the use of brown coal semi-coke of Berezovskii deposits of Kansk-Achinsk basin: the yield of silicon carbide is 97.00 – 97.62 % at its content in the products of carbidization of 82.52 – 84.90 %. The optimum temperature-time conditions and the indicators of carbidization have been defi ned, namely: the temperature of 1923 – 1973 К at the duration of 20 – 15 min. The dominant phase in the products of carbidization is silicon carbide of a cubic structure (β-SiC). As a result of chemical enrichment, the content of SiC in carbide is 90 – 91 %, i.e. it is higher than in abrasive micropowders with the granularity of 1 – 2 μm. The enrichment effi ciency from the impurity of oxides and iron is high and makes 87 – 95 %. For silicon carbide a high content of silica is typical – more than 7 %; that allows considering it as a perspective material for the production of carbide-silicic refractory materials on a silica band. Silicon carbide has been received in the form of micropowder with the particles of irregular form with a size diapason of 0.2 – 1.0 μm.
About the Authors
A. E. Anikin
Siberian State Industrial University, Novokuznetsk, Russia
Russian Federation
Senior Lecturer of the Chair “Thermal Power and Ecology”
Russian Federation
Senior Lecturer of the Chair “Thermal Power and Ecology”
G. V. Galevskii
Siberian State Industrial University, Novokuznetsk, Russia
Russian Federation
Russian Federation
Dr. Sci. (Eng.), Professor, Director of the Institute of Metallurgy and Materials
V. V. Rudneva
Siberian State Industrial University, Novokuznetsk, Russia
Russian Federation
Russian Federation
Dr. Sci. (Eng.), Professor of the Chair “Non-ferrous Metalllurgy and Chemical Engineering”
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Review
For citations:
Anikin A.E., Galevskii G.V., Rudneva V.V. CARBIDIZATION OF TECHNOGENIC MICROSILICA BY BROWN-COAL SEMI-COKE. Izvestiya. Ferrous Metallurgy. 2016;59(2):105-111. (In Russ.) https://doi.org/10.17073/0368-0797-2016-2-105-111
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