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- Title
Sb DISTRIBUTION IN THE PHASES OF SiO<sub>2</sub> SATURATED Sb-Fe-O-SiO<sub>2</sub>-CaO SYSTEM IN AIR.
- Authors
Zhang, Z.-T.; Nie, H.-P.; Yan, K.
- Abstract
Sb distribution in the phases of SiO2 saturated Sb-Fe-O-SiO2-CaO system was determined for the first time through heightemperature experiment and quenching techniques, followed by Electron probe X-ray microanalysis (EPMA) in air (Ptot = 1 atm, PO2 = 0.21 atm). The phases were quantified in the temperature range of 900 °C-1200 °C and the effects of Fe/SiO2 (mass fraction) and CaO/SiO2 (mass fraction) on Sb2O3 content in the Sb-Fe-O-SiO2-CaO system were investigated at 1200 °C. The results indicated that the Sb-containing phase primarily existed in the solid solution phase at 1200 °C. With the increase of temperature from 1100 °C to 1200 °C, the Sb2O3 content in the solid solution phase increased drastically from 7.52 wt% to 17.36 wt%. Lowering the values of CaO/SiO2 and Fe/SiO2 in the smelting process effectively reduced Sb2O3 content in the slag. The verification of the experiment results suggested that the antimony content in slag was 0.57 wt%, the crude antimony yield rate was lower than 4%, and the crude antimony grade was beyond 94 wt%, which meant that the reduction of antimony content in the slag could be achieved.
- Subjects
ELECTRON probe microanalysis; SMELTING furnaces; SOLID solutions; SLAG; ANTIMONY
- Publication
Journal of Mining & Metallurgy. Section B: Metallurgy, 2021, Vol 57, Issue 1, p13
- ISSN
1450-5339
- Publication type
Article
- DOI
10.2298/JMMB200406030Z