Abstract
MgO is the main impurity in calcium aluminate slags. The presence of MgO will change the nature of the alumina bearing phases and decrease the alumina leaching properties of the slag. In order to remove or reduce the negative effect of MgO, the method of changing the C/A (CaO/Al2O3, molar ratio, excluding CaO in 2CaO·SiO2) of the calcium aluminate slag was studied and the effect on leaching mechanism was also analyzed. The results showed that the formation of the quaternary compound 20CaO·13Al2O3·3MgO·3SiO2 (C20A13M3S3) is inhibited with increasing C/A in the calcium aluminate slag, and the MgO crystallized in the form of periclase under these conditions. There is an optimal C/A to improve the alumina leachability of the calcium aluminate slag. The increase of C/A could not remove the negative effect of MgO on leachability completely, and the optimal C/A of the slag increases with increasing MgO content.
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© 2011 TMS (The Minerals, Metals & Materials Society)
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Bo, W., Hui-lan, S., Dong, G., Shi-wen, B. (2011). Effect of Calcium/Aluminium ratio on MgO containing calcium aluminate slags. In: Lindsay, S.J. (eds) Light Metals 2011. Springer, Cham. https://doi.org/10.1007/978-3-319-48160-9_35
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DOI: https://doi.org/10.1007/978-3-319-48160-9_35
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-48567-6
Online ISBN: 978-3-319-48160-9
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