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| Effects of w（MgO） and w（Al2O3） on softening-melting properties of mixed burden |
| LI Ting-le1，2， SUN Chang-yu1，2， WANG Qi1，2 |
| （1. School of Materials and Metallurgy， University of Science and Technology Liaoning， Anshan 114051， Liaoning， China； 2. Key Laboratory of Chemical Metallurgy of Liaoning Province， Anshan 114051， Liaoning， China） |
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Abstract The popular measure to improve the smelting of high w（Al2O3） ore in BF is adding w（MgO）into the sinter， and then both the w（MgO） and the w（Al2O3） in the sinter increase and the w（MgO）/w（Al2O3） ratio changes. To reach low smelting cost， it is of need to adjust w（MgO） and w（Al2O3） in burden reasonablely. Based on the actual production of sinters and the lump， the variation trends of softening-melting properties of mixed burdens under the conditions that both the w（MgO） and the w（Al2O3） were increased in the sinter. Combined with phase diagrams and X-ray diffractions， influencing mechanisms of the w（MgO） and the w（Al2O3） were analyzed. The results showed that， with the increasing of the w（MgO）and the w（Al2O3） in the sinter， the softening characteristic temperatures of mixed burdens tended to decrease； the reduction of the melting temperature and the viscosity of the slag phase caused the reduction of the melting characteristic temperatures of mixed burdens； adding w（MgO）to reach a proper w（MgO）/w（Al2O3） could improve the softening-melting properties of the high w（Al2O3） burden.
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Received: 05 July 2018
Published: 15 February 2019
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2019, Vol. 54 
