Abstract
The valorization of aluminum dross for Al recovery was performed via its mixing with metallic copper to produce Al-Cu alloys. This approach was with the intention of establishing a new smelting process to treat the dross with Cu scrap use. To evaluate the high temperature interaction of the materials, the wettability of a Cu-containing aluminum alloy with the non-metallic components of the dross was studied by the sessile drop method. It was found that the wetting was weak via temperature changes at 973–1373 K, and consequently no proper metal separation occurred. To better separate the metallic and non-metallic phases with larger density differences, a higher Cu portion was considered to obtain a significantly denser metallic phase, and it was found that partial separation of the Al in an Al-Cu alloy is possible. The complete separation of the metallic components of the dross was, however, experienced by the dross and copper melting with the addition of pre-melted calcium aluminate slags at elevated temperatures. It was found that Al-Cu alloys were produced and separated from the adjacent slags, and the aluminum oxide of the dross ended up in the slag phase. Moreover, the characteristics of the produced slags depend on the process charge.
Highlights
Aluminum alloys are light, conductive, and corrosion resistant, properties that have made them a widely used material with applications in the aerospace, architectural construction, and marine industries, as well as in many domestic contexts [1,2]
To evaluate the high temperature interaction of the materials, the wettability of a Cu-containing aluminum alloy with the non-metallic components of the dross was studied by the sessile drop method
Aluminum Black Dross (ABD) involves a mix of aluminum oxides and slag, with recoverable aluminum content is in the range 12–18% and a greater amount of salt substance; for instance, greater than 40% stood out from white dross [11,12,13,14,15,16]
Summary
Conductive, and corrosion resistant, properties that have made them a widely used material with applications in the aerospace, architectural construction, and marine industries, as well as in many domestic contexts [1,2]. The main purpose of the present work was to experimentally examine the effect of copper addition into AWD on the Al recovery from the white dross via a high temperature melting process with and without flux addition In this case, the melting of AWD was with the goal of recovering the metallic Al in AWD in the form of Al-Cu alloys. RBatausreeds o(Fnigthuerea7naa)l.yBsaisseodf tohnetwheetatninaglyksisnoetfitchceuwrveett(inFgigkuirnee7tiac) caunrdveva(Fluigeusroef7tha)eacnodntvaacltuaensgolef tahfteecro5nmtaicnt faonrgsliexatfetmerp5emraitnurfeorinstiexrvteamlsp(eFriagtuurree7ibn)t,eirtvcaalns (bFeigcuornec7lubd),eidt ctahnatbethceontecmlupdeerdattuhraet tchheantegme pinertahteurreanchgaenogfe1i3n7t3hteora9n73geKodf o13e7s3ntoot 9a7ff3eKct dthoeeswnoetttaafbfielcittythoef twheetAtalb-Silii-tCyuofaltlhoeyA/Al-Sl id-Croussalslyosyt/eAml,di.reo.s, sthseysvtaelmue, io.ef.,ththeecovnaltuacetoafntghlee cdoonetsacntoatncghlaendgeo.eIst nshoot uchldanbgeen.oIttesdhtohualtdthbeecnoontteadcttahnagt ltehsemceoanstuacretdanagftleers5mmeiansuhroelddinafgteart 5eamchinchoonlsdeicnugtiavteetaecmhpceornastuecreutciyvceletepmrepseernatteudrevecryyclheipghrevseanluteeds avnedrythheiyghwvearleuseisgnanifidcathnetlyy whiegrheesrigthnaifnic9a0n◦t,lyi.eh.,igthheerwtehtatanb9il0it°y, ic.rei.t,etrhiae,wwehtitcahbiplirtoyvcersittehraita,thwehAiclh-Sip-Crouveasllothya/tAtlhderAosl-s Scio-Cupulealilsoya/nAolnd-rwoeststicnogupsylestiesma.non-wetting system In all the former studies [29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47], no significant work was performed on studying the wetting behavior of liquid Al-Si-Cu alloy in contact with Al dross substrate with particular emphasis on the CP procedure. A salt-free process for Al recovery from the dross was studied and, the melting trials were performed without any salt use
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