Journal
JOM
Volume 67, Issue 9, Pages 1966-1974Publisher
SPRINGER
DOI: 10.1007/s11837-015-1544-z
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Funding
- Program for New Century Excellent Talents in University [NCET-11-0515]
- Co-Innovation Center for Clean and Efficient Utilization of Strategic Metal Mineral Resources
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The sintering behaviors of saprolitic nickeliferous laterite with various quaternary basicities [(CaO + MgO)/(SiO2 + Al2O3) mass ratio] in a reductive atmosphere are investigated by simulative sintering and validated by sintering pot tests. The simulative sintering results show that the generation of diopside (CaMgSi2O6) with low melting point is the key reason for the decrease in characteristic fusion temperatures when the quaternary basicity increases from 0.5 to 0.8-1.0. Continuous increase of basicity leads to transformation of diopside (CaMgSi2O6) into akermanite (Ca2MgSi2O7), which adversely increases the characteristic fusion temperatures. These findings are confirmed by the sinter pot tests, which demonstrate that the sintering indexes including vertical sintering velocity (VSV), yield (Y), and productivity (P), can be improved by optimizing quaternary basicity. At basicity of 1.0, the VSV, Y, P, and ISO tumbling index reach 49.2 mm/min, 80.5%, 1.0 t/(h m(2)), and 66.5%, respectively.
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