Physicochemical simulation of fusion processes of basalt and diabase with Na2CO3 and Na2CO3 + CaO |
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| Authors: | I. Z. Babievskaya N. P. Dergacheva N. F. Drobot S. V. Fomichev V. A. Krenev |
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| Affiliation: | (1) The Materials Science and Metallurgy Engineering College, Guizhou University and The Key Laboratory of Materials Structure and Strength, Guiyang, Guizhou Province, 550003, P.R. China; |
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| Abstract: | Fusion processes of basalt and diabase with sodium carbonate and its mixture with calcium oxide are investigated by methods of physicochemical simulation. Equilibrium compositions of the Si-Al-Fe-Ca-Mg-Na system are calculated at various ratios Na2CO3: basalt (diabase) and (Na2CO3 + CaO): basalt (diabase) in the temperature range of 1270–1470 K. It is shown that, on fusion with sodium carbonate, depending on conditions, the main components of fusion products are sodium metasilicate (Na2SiO3) and sodium metaaluminate (NaAlO2), magnesium orthosilicate (CaMgSiO4), sodium ferrite(III) (NaFeO2), iron(III) oxide (Fe2O3), and sodium-aluminum orthosilicate (Na2AlSiO4). On fusion with the mixture of sodium carbonate and calcium oxide, respectively, the products are sodium metaaluminate, calcium pyrosilicate (Ca3Si2O7), calcium-magnesium orthosilicate, and calcium ferrite (CaFe2O4). |
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