Investigation of Origin of Attached Cu-Ag Droplets to Solid Particles During High-Temperature Slag/Copper/Spinel Interactions

被引:12
作者
Bellemans, Inge [1 ]
Dewilde, Evelien [2 ]
Blanpain, Bart [3 ]
Moelans, Nele [3 ]
Verbeken, Kim [1 ]
机构
[1] Univ Ghent, Dept Mat Text & Chem Engn, Technol Pk 903, B-9052 Ghent, Belgium
[2] Umicore R&D, Kasteelstr 7, B-2250 Olen, Belgium
[3] Katholieke Univ Leuven, Dept Mat Engn, Kasteelpk Arenberg 44,Bus 2450, B-3001 Heverlee, Leuven, Belgium
来源
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE | 2017年 / 48卷 / 06期
基金
比利时弗兰德研究基金会;
关键词
LIQUID SLAGS INFLUENCE; COPPER LOSSES; METALLIC DROPLETS; ENTRAINMENT; SIMULATION; BEHAVIOR; SURFACE;
D O I
10.1007/s11663-017-1088-4
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
This study investigates the origin of mechanically entrained metal droplets in liquid slag due to their interaction with solid spinel particles. Two possible mechanisms were proposed previously: separately formed droplets and spinel particles get attached to each other due to agitation of the slag and metal phases; or the spinel particles form by a chemical reaction together with a new droplet or alongside a droplet that was already present in the system. In this study, an inert tracer element was added to the metallic phase in adapted sessile drop experiments. For this purpose, Cu-Ag alloys, with various Ag-contents, were produced. The results showed that the small entrained metal droplets within the slag droplet contained Ag, but in very low amounts with respect to the amount of Ag in the Cu-Ag alloy. This indicates that the entrained metal droplets are formed due to a sequential combination of the two origins: first, very small metal droplets are dispersed in the slag drop, due to the emulsification process. Then, these metal droplets are nucleation sites for the Cu-spinel reactive formation.
引用
收藏
页码:3058 / 3073
页数:16
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