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Chemical Corrosion of Dense Al2O3 by ZnO-containing Fayalite Slags

机译:含ZnO的方铁石矿渣对重质Al2O3的化学腐蚀

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Fayalite slags with different ZnO levels can be generated in secondary copper smelters as feeding materials may contain Zn or ZnO.For the furnace linings, Al2O3-based refractories are potential alternatives for magnesia-chromite refractories as they do not suffer from the possible formation of hazardous Cr6+ containing phases.Therefore, the chemical corrosion of Al2O3 by ZnO-containing fayalite slags was investigated in this work by Al2O3 crucible tests at 1200 ℃ for 4 h under Ar atmosphere.The influence of the ZnO level, FeO/SiO2 ratio and CaO/SiO2 ratio of the slag on the Al2O3 dissolution and the Al2O3/slag interracial reactions was studied.The microstructure of the corroded Al2O3 crucibles and the slag composition were analyzed by electron probe micro-analysis equipped with a wavelength dispersive spectroscope (EPMA-WDS).The experimental results from the crucible tests were interpreted by thermodynamic calculations.
机译:由于进料中可能含有Zn或ZnO,因此二级铜冶炼厂可能会生成不同ZnO含量的方铁矿渣。对于炉衬,Al2O3基耐火材料是镁铬铁质耐火材料的潜在替代品,因为它们不受可能形成有害物质的影响因此,本研究通过在Ar气氛下于1200℃下进行Al2O3坩埚试验4 h,研究了含ZnO的铁橄榄石渣对Al2O3的化学腐蚀情况.ZnO含量,FeO / SiO2比和CaO /研究了炉渣中SiO2比对Al2O3溶解及Al2O3 /炉渣异族反应的影响。通过配备波长色散光谱仪(EPMA-WDS)的电子探针显微分析法对腐蚀的Al2O3坩埚的微观结构和炉渣成分进行了分析。通过热力学计算解释了坩埚试验的实验结果。

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