| Autor: |
Anikin, A., Galevskii, G., Rudneva, V. |
| Zdroj: |
Steel in Translation; Feb2016, Vol. 46 Issue 2, p93-98, 6p |
| Abstrakt: |
The formation of silicon carbide from briquetted batch consisting of microsilica waste from silicon and silicon-alloy production is investigated. The batch is treated at 1873, 1923, and 1973 K, for 5-30 min, with various reducing agents: lignite semicoke, coal semicoke, coke breeze, and coke dust. The best results are obtained when using lignite semicoke from the Berezovsk deposit in Kansko-Achinsk Basin: the yield of silicon carbide is 97.00-97.62%; it constitutes 82.52-84.90% of the products obtained. The optimal treatment temperature and time are determined: 1923-1973 K for 15-20 min. The products consist predominantly of cubic silicon carbide (β SiC). Chemical enrichment increases the SiC content in the products to 90-91%; this is higher than in abrasive micropowder of grain size 1-2 μm. The effectiveness of enrichment in terms of oxide and iron impurities is high: 87-95%. The silicon carbide is characterized by a high silica content: more than 7%. Accordingly, it may be regarded as a promising material for the production of siliconcarbide refractories used in silica binder. Silicon carbide is obtained as micropowder with irregular particles in the size range 0.2-1.0 μm. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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