Preparation of Silumin through Arc-Plasmous Processing Mechanically Activated Minerals of the Sillimanite Group
G. G. LEPEZIN1, A. S. ANSHAKOV2, V. A. FALEEV2, E. G. AVVAKUMOV3, and O. V. VINOKUROVA3
1Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences, Pr. Akademika Koptyuga 3, Novosibirsk 630090 (Russia)
E-mail: lepezin@igm.nsc.ru
2Kutateladze Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences, Pr. Akademika Lavrentyeva 1, Novosibirsk 630090 (Russia)
E-mail: anshakov@itp.nsc.ru
3Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of the Russian Academy of Sciences, Ul. Kutateladze 18, Novosibirsk 630128 (Russia)
E-mail: avvakumov@solid.nsc.ru
Keywords: minerals of the group of sillimanite, plasma heating, reducing agents, mechanic activation, products of electrothermy, silumin, aluminium
Pages: 131–142
Abstract
Experiments on carbothermy of minerals of the sillimanite group (MSG, Al2SiO5, composition (mass %): Al2O3 62.9, SiO2 37.1) and quartzites containing them. The mixture melted after the mechanical activation under reducing conditions. Graphite, charcoal and sawdust were used as reducing agents. Graphite, charcoal and sawdust were used as reducing agents. The average statistical compositions of the products of melting were determined (mass %): aluminium-silicon – Al 93.62, Si 6.14, Fe 0.13, Ti 0.06; n = 429 (n is the number of determinations over which averaging was carried out), in 245 analyses the content of aluminium exceeds 98 mass %; silicon – Si 99.65, Al 0.22, Fe 0.12, Ti 0.02; n = 122. The results of the research show the fundamental possibility of the preparation of silumin, and along the way, silicon from MSG using plasma heating. Resources of the minerals of the group of sillimanite in Russia were evaluated. The program of specific activities on the transition of the production of silumin and aluminium to a new sort of raw materials and new technologies were proposed.
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