Effect of ZnO level in secondary copper smelting slags on slag/magnesia-chromite refractory interactions

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• 作者：Liugang Chen ; ^{liugang.chen@mtm.kuleuven.be" class="auth_mail" title="E-mail the corresponding author} ; Muxing Guo ; Huayue Shi ; Shuigen Huang ; Peter Tom Jones ; Bart Blanpain ; Annelies Malfliet
• 关键词：Refractories ; Magnesia-chromite ; MgO ; ZnO-containing fayalite slag ; Corrosion
• 刊名：Journal of the European Ceramic Society
• 出版年：2016
• 出版时间：June 2016
• 年：2016
• 卷：36
• 期：7
• 页码：1821-1828
• 全文大小：2137 K

文摘

To determine the effect of ZnO in ZnO-containing fayalite (ZFS) slags on the degradation of magnesia-chromite refractories, the corrosion behaviour of a direct-bonded magnesia-chromite refractory was studied by rotating refractory finger tests at 1200 °C under reducing atmosphere. In addition, MgO crucible tests at these conditions were performed to investigate in particular the effect of ZnO on the slag/MgO interaction. The dissolution of MgO from periclase into the ZFS slags is not enhanced by increasing the ZnO content in the slags. (Fe,Mg,Zn)₂SiO₄ olivine and (Fe,Mg,Zn)O solid solution are the only two products in the slag/MgO interfacial reactions, even when the ZnO content in the ZFS slag reaches 16.7 wt%. The diffusion of ZnO into the chromite grains to form the (Fe,Mg,Zn)(Fe,Al,Cr)₂O₄ spinel was favoured with increasing the ZnO content in ZFS slags.