Viscosity and structure evolution of the SiO2-MgO-FeO-CaO-Al2O3 slag in ferronickel smelting process from laterite
The SiO2 fractions in laterite-nickel ores are quite high, thus certain amount of lime should be used as fluxing material to achieve good fluidity and desulfurization capacity in industrial smelting process. However, this operation leads to an additional cost of lime. In addition, the incre...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
University of Belgrade, Technical Faculty, Bor
2017-01-01
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| Series: | Journal of Mining and Metallurgy. Section B: Metallurgy |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/1450-5339/2017/1450-53391700002L.pdf |
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| Summary: | The SiO2 fractions in laterite-nickel ores are quite high, thus certain
amount of lime should be used as fluxing material to achieve good fluidity
and desulfurization capacity in industrial smelting process. However, this
operation leads to an additional cost of lime. In addition, the increase of
slag volume decreases the effective furnace volume. To avoid such problem,
partial reduction of FeO has been suggested. Therefore, the high SiO2, low
MgO and FeO and very little CaO slag is formed, which was less studied in the
previous literature. Therefore, the viscosity and slag structure are
investigated in the present study through FT-IR and Raman analysis methods.
Experimental results show that the slag is a mixture of liquid and solid
phases under the experimental temperature. The FT-IR and Raman spectra show
that the fractions of the complex polymerization structure decrease
significantly with the increase of FeO content and slag basicity, resulting
in the decrease of apparent viscosity. |
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| ISSN: | 1450-5339 2217-7175 |