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Froth Flotation of Copper and Copper Compounds from Fine Fractions of Waste Incineration Bottom Ashes
Author(s) -
Breitenstein Boris,
Elwert Tobias,
Goldmann Daniel,
Haas Andrea,
Schirmer Thomas,
Vogt Volker
Publication year - 2017
Publication title -
chemie ingenieur technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.365
H-Index - 36
eISSN - 1522-2640
pISSN - 0009-286X
DOI - 10.1002/cite.201600017
Subject(s) - incineration , copper , froth flotation , bottom ash , metal , waste management , ferrous , metallurgy , chemistry , environmental science , materials science , fly ash , engineering
In Germany about 5 million tons of municipal solid waste incineration (MSWI) bottom ashes are treated for metal recovery annually. With the actual processing metal recovery is realized down to 2 mm. The fractions < 2 mm are utilized without metal recovery. Due to high residual concentrations of non‐ferrous metals in these fractions, especially Cu, several thousand tons of metals are lost every year. This article presents an approach to recover Cu of fine fractions < 0.2 mm by froth flotation. Several collector regimes are screened and flotation parameters are varied. First results exhibit Cu recoveries of 50 % with Cu concentrations of about 5 %.