A study on copper recovery from the slag of Outokumpu direct-to-copper process
The work was aimed at the investigation of the influence of the carbon reducer抯 surface on the rate of the de-coppering of the slag from the flash direct-to-blister process at the G硂g體 II smelter, Poland. It was found that, for the experimental conditions, the copper recovery from the slag increases as the interface of the slag/carbon increases; however this is the case only to some extent. It is very likely that this limit would depend on the geometry of the investigated system. Further increase of the slag/carbon interface does not noticeably change the final copper content in the slag. The obtained results do not follow any of the reaction rate equations, so it can suggest that the transport phenomena play the key role in the de-coppering process. The investigated slag has probably a higher viscosity, which hampers the mass transfer in this slag. This hypothesis is supported by the fact that the slag layer situated below the penetrator is of a different colour than the slag in the vicinity of those penetrators where it was agitated by the CO, and CO2 gases generated by the reactions of the slag reductions. The slag in the layer under the penetrator contained more copper than the slag above this layer.
copper recovery Outokumpu direct-to-copper process
M. Kucharski T. Sak P. Madej M. W(e)drychowicz W. Mróz
AGH University of Science and Technology, Department of Metallurgy of Non-Ferrous Metals, 30 Mickiewicza Avenue, 30-059 Kraków, Poland
国际会议
Ninth International Conference on Molten Slags,Fluxes and Salts(第九届国际熔渣、溶剂与熔盐学术会议 MOLTEN12)
北京
英文
1-10
2012-05-27（万方平台首次上网日期，不代表论文的发表时间）