在冶金炉渣中，依附在固体尖晶石上的金属熔滴可有效阻止铜在炉渣中的沉积。为了理解这一现象，评估了尖晶石颗粒和铜及与炉渣的交互作用。分别以 PbO?FeO?SiO2?CaO?Al2O3?Cu2O?ZnO 合成炉渣、纯铜和MgAl2O4基体代表工业废渣、铜滴和固体尖晶石。用静滴法和显微组织分析研究铜?MgAl2O4和炉渣?MgAl2O4交互作用。另外，采用沉浸实验研究时间对炉渣?MgAl2O4交互作用的影响。结果表明，铜在 MgAl2O4上不润湿，然而炉渣在MgAl2O4上润湿并在界面处形成了(Mg, Fe, Zn)(Al, Fe)2O4尖晶石交互层，在浸出实验中也观察到了该现象。同时观察到了MgO 和 Al2O3从尖晶石基体扩散到炉渣中。
Metal droplets sticking to spinel solids, present in metallurgical slag systems, play an important role in hindering the sedimentation of copper in slags. To understand this phenomenon, the interaction between spinel particles with Cu on one handand with slag, on the other hand,wasevaluated. A dedicated approach was applied, using an industrially relevant synthetic slag system PbO?FeO?SiO2?CaO?Al2O3?Cu2O?ZnO, pure copper and MgAl2O4substrates to represent the industrial slag, the entrained copper droplets and the spinel solids, respectively. Both the copper?MgAl2O4and the slag?MgAl2O4interaction were studied using sessile drop measurements, combined with an extensive microstructural analysis. Additionally, the effectoftimeon the slag?MgAl2O4 interaction was studied using immersion experiments. Copper displayed a non-wetting behaviour on MgAl2O4, whereas slag displayed a reactive wetting and an interaction layer of (Mg,Fe,Zn)(Al,Fe)2O4spinelwas formed at the interface, which was also observed in the immersion experiments. Moreover, the diffusion of MgO and Al2O3from the spinel substrate into the slag droplets was noted.
参考文献
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