Browse > Article
http://dx.doi.org/10.7844/kirr.2011.20.4.058

Recovery of An, Ag, and Ni from PCB Wastes by CaF2-containing Slag  

Park, Joo-Hyun (School of Materials Science and Engineering, University of Ulsan)
Publication Information
Resources Recycling / v.20, no.4, 2011 , pp. 58-64 More about this Journal
Abstract
Recovery of novel metals such as Au, Ag and Ni from wastes PCB was investigated by slag treatments. The CaO-$Al_2O_3$(-$SiO_2$) and CaO-$SiO_2$-$CaF_2$ slags were employed in the present study. The PCB/Cu ratio is recommended to be lower than unity. The use of CaO-$SiO_2$-$CaF_2$ slag provided the more higher yield of Au, Ag and Ni than the CaO-$Al_2O_3$(-$SiO_2$) slag did, which was mainly due to the lower melting point and the viscosity of $CaF_2$-containing slag. The terminal descending velocity of metal droplets in the slag phase increased with decreasing slag viscosity.
Keywords
Metal recovery; PCB (Printed circuit board); Slag; Viscosity; Terminal velocity;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
1 D.R. Poirier and G.H. Geiger, 1994: Laminar flow and momentum equation, Transport Phenomena in Materials Processing, TMS, Warrendale, PA, pp. 39-75.
2 T. Iida and R.I.L. Guthrie, 1993: Density, The Physical Properties of Liquid Metals, Oxford University Press, Oxford, pp. 47-77.
3 K.C. Mills, 1995: Viscosity of molten slags, Slag Atlas, 2nd edition, Verlag Stahleisen GmbH, Dusseldorf, Germany, pp. 349-402.
4 B.S. Kim, J.C. Lee, S.P. Seo, Y.K. Park and H.Y. Sohn, 2004: A process for extracting precious metals from spent printed circuit boards and automobile catalysts, JOM 56(12), pp. 55-58.   DOI   ScienceOn
5 J.H. Park and D.J. Min, 2007: Discussion on "The estimation of the iso-viscosity lines in molten $CaF_2-CaO-SiO_2$ system", ISIJ Int. 47(9), pp. 1368-1369.   DOI   ScienceOn
6 B.S. Kim, 2005: Process development for recycling valuable metals from obsolete electric and electronic scrap, Trends in Met. & Mater. Eng. 18(4), pp. 21-29.
7 B.C. Ban, J.Y. Song, J.Y. Lim, S.K. Wang, K.G. An and D.S. Kim, 2005: Studies on the reuse of waste printed circuit board as an additive for cement mortar, J. Environ. Sci. Health, Part A 40(3), 645-656.   DOI   ScienceOn
8 D.Y. Shin, S.D. Lee, H.B. Jeong, B.D. You, J.H. Han and J.K. Jung, 2008: Pyro-metallurgical treatment of used OA parts for the recovery of valuable metals, J. Kor. Inst. Resources Recycling 17(2), pp. 46-54.
9 J.H. Oh, J.S. Kim, S.M. Moon, J.W. Min, 2010: Urban mine resources and metals recycling industries in Japan, J. Kor. Inst. Resources Recycling 19(6), pp. 11-26.
10 B.C. Ban, C.M. Kim, Y.I. Kim, and D.S. Kim, 2002: Recovery of precious metals from waste PCB and auto catalyst using arc furnace, J. Kor. Inst. Resources Recycling 11(6), pp. 3-11.