Metallurgy, Vol. 59 No. 3, 2020.
Preliminary communication
Lead and zinc removal from alloy Zn-Ag-Pb under reduced pressure
J. Łabaj
orcid.org/0000-0001-9009-735X
; Silesian University of Technology, Faculty of Materials Science, Katowice, Poland
L. Blacha
orcid.org/0000-0001-5629-0455
; Silesian University of Technology, Faculty of Materials Science, Katowice, Poland
Abstract
The presented work shows the results of vacuum melting of industrial Zn-Ag-Pb alloy arising from the processing of silver-bearing foam. The tests were carried out in an induction vacuum aggregate in the temperature range 773 - 873 K and pressure 10 - 1 000 Pa. Based on the results obtained, the values of the density of the evaporating stream of zinc and lead were estimated, which were at the level from 3,95×10-4 to 9,53×10-4 gZncm-2 s-1 and from 5,39×10-5 to 30,9×10-5 gPbcm-2 s-1 . In addition, silver losses were estimated in the analysed process. The maximum degree of dezincification of the alloy achieved for the assumed temperature and pressure was 99 %.
Keywords
Zn-Ag-Pb alloy; fire refining of lead; silver-bearing foam; vacuum refining; evaporation of metals
Hrčak ID:
237041
URI
Publication date:
1.7.2020.
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