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Sessile drop evaluation of high temperature copper/spinel and slag/spinel interactions

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Abstract
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 hand and with slag, on the other hand, was evaluated. A dedicated approach was applied, using an industrially relevant synthetic slag system PbO-FeO-SiO2-CaO-Al2O3-Cu2O-ZnO, pure copper and MgAl2O4 substrates to represent the industrial slag, the entrained copper droplets and the spinel solids, respectively. Both the copper-MgAl2O4 and the slag-MgAl2O4 interaction were studied using sessile drop measurements, combined with an extensive microstructural analysis. Additionally, the effect of time on 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)(2)O-4 spinel was formed at the interface, which was also observed in the immersion experiments. Moreover, the diffusion of MgO and Al2O3 from the spinel substrate into the slag droplets was noted.
Keywords
MGO, REFRACTORIES, SLAGS, COPPER LOSSES, INDIRECT DISSOLUTION, DEGRADATION, PARTICLES, BEHAVIOR, KINETICS, CONTACT, sessile drop, copper, spinel, slag

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Chicago
De Wilde, Evelien, Inge Bellemans, Mieke Campforts, Muxing Guo, Bart Blanpain, Nele Moelans, and Kim Verbeken. 2016. “Sessile Drop Evaluation of High Temperature Copper/spinel and Slag/spinel Interactions.” Transactions of Nonferrous Metals Society of China 26 (10): 2770–2783.
APA
De Wilde, E., Bellemans, I., Campforts, M., Guo, M., Blanpain, B., Moelans, N., & Verbeken, K. (2016). Sessile drop evaluation of high temperature copper/spinel and slag/spinel interactions. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA, 26(10), 2770–2783.
Vancouver
1.
De Wilde E, Bellemans I, Campforts M, Guo M, Blanpain B, Moelans N, et al. Sessile drop evaluation of high temperature copper/spinel and slag/spinel interactions. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA. AMSTERDAM: ELSEVIER SCIENCE BV; 2016;26(10):2770–83.
MLA
De Wilde, Evelien, Inge Bellemans, Mieke Campforts, et al. “Sessile Drop Evaluation of High Temperature Copper/spinel and Slag/spinel Interactions.” TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA 26.10 (2016): 2770–2783. Print.
@article{8199873,
  abstract     = {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 hand and with slag, on the other hand, was evaluated. A dedicated approach was applied, using an industrially relevant synthetic slag system PbO-FeO-SiO2-CaO-Al2O3-Cu2O-ZnO, pure copper and MgAl2O4 substrates to represent the industrial slag, the entrained copper droplets and the spinel solids, respectively. Both the copper-MgAl2O4 and the slag-MgAl2O4 interaction were studied using sessile drop measurements, combined with an extensive microstructural analysis. Additionally, the effect of time on 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)(2)O-4 spinel was formed at the interface, which was also observed in the immersion experiments. Moreover, the diffusion of MgO and Al2O3 from the spinel substrate into the slag droplets was noted.},
  author       = {De Wilde, Evelien and Bellemans, Inge and Campforts, Mieke and Guo, Muxing and Blanpain, Bart and Moelans, Nele and Verbeken, Kim},
  issn         = {1003-6326},
  journal      = {TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA},
  language     = {eng},
  number       = {10},
  pages        = {2770--2783},
  publisher    = {ELSEVIER SCIENCE BV},
  title        = {Sessile drop evaluation of high temperature copper/spinel and slag/spinel interactions},
  url          = {http://dx.doi.org/10.1016/S1003-6326(16)64344-3},
  volume       = {26},
  year         = {2016},
}

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