Comparative studies on acid leaching of zinc waste materials
PBN-AR
Instytucja
Wydział Metali Nieżelaznych (Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie)
Informacje podstawowe
Główny język publikacji
EN
Czasopismo
Metallurgical Research & Technology (20pkt w roku publikacji)
ISSN
2271-3646
EISSN
2271-3654
Wydawca
Les Ulis : EDP Sciences
DOI
URL
Rok publikacji
2018
Numer zeszytu
1 art. no. 110
Strony od-do
1--11
Numer tomu
115
Link do pełnego tekstu
Identyfikator DOI
Liczba arkuszy
0.78
Autorzy
(liczba autorów: 3)
Pozostali autorzy
+ 1
Słowa kluczowe
EN
slag
ash
leaching
zinc
dust
Streszczenia
Język
EN
Treść
Three industrial waste materials were characterized in terms of their elemental and phase compositions, leaching behaviour in 10% sulfuric acid solution as well as leaching thermal effects. Slag from melting of mixed metallic scrap contained about 50% Zn and 10% Pb. It consisted mainly of various oxides and oxy-chlorides of metals. Zinc spray metallizing dust contained about 77% Zn in form of zinc and/or zinc-iron oxides, zinc metal and Zn-Fe intermetallic. Zinc ash from hot dip galvanizing was a mixture of zinc oxide, metallic zinc and zinc hydroxide chloride and contained about 80% Zn. Dissolution efficiency of zinc from the first material was 80% (independently on the solid to liquid ratio, 50-150 kg/m(3)), while decrease of the efficacy from 80% to 60% with increased solid to liquid ratio for the two remaining materials was observed. Both increase in the temperature (20 degrees C to 35 degrees C) and agitation rate (300 rpm to 900 rpm) did not improve seriously the leaching results. In all cases, transfer of zinc ions to the leachate was accompanied by different levels of solution contamination, depending on the type of the waste. Leaching of the materials was exothermic with the similar reaction heats for two high oxide-type products (slag, zinc ash) and higher values for the spray metallizing dust.
Cechy publikacji
original article
peer-reviewed
Inne
System-identifier
idp:113502
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