2005
DOI: 10.1007/s10800-005-5289-1
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Recovery of aluminum from oxide particles in aluminum dross using AlF3–NaF–BaCl2 molten salt

Abstract: To recover aluminum from aluminum dross, a floating separation of aluminum alloy from the oxides and subsequent electrolysis of the oxides was carried out in a molten salt bath of 33 mol% AlF 3 , 51 mol% NaF and 16 mol% BaCl 2 . With A356.0 casting alloy dross, 83% of the aluminum alloy was recovered by the floating separation. A further 4% of metallic aluminum was recovered by electrolysis in the molten salt containing the oxides separated from the dross. The optimum current for continuous operation is discus… Show more

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Cited by 21 publications
(8 citation statements)
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“…During dross collection, each lot of material taken may differ depending on a number of parameters such as removal speed, collection depth, and so forth. Most foundries employ automated [8] or manual collection by means of a mechanical ladle mounted on a clark or direct handling of the collection device by personnel [9]. In these cases the material removal process is not reproducible with regard to its composition since the aforementioned parameters cannot be kept constant as the surface shear of this procedure is described by rather complex phenomena [10].…”
Section: Methodsmentioning
confidence: 99%
“…During dross collection, each lot of material taken may differ depending on a number of parameters such as removal speed, collection depth, and so forth. Most foundries employ automated [8] or manual collection by means of a mechanical ladle mounted on a clark or direct handling of the collection device by personnel [9]. In these cases the material removal process is not reproducible with regard to its composition since the aforementioned parameters cannot be kept constant as the surface shear of this procedure is described by rather complex phenomena [10].…”
Section: Methodsmentioning
confidence: 99%
“…[9] and [10] can proceed at the cell voltages higher than ionization potentials of the oxygen from Al 2 O 3 or of the nitrogen from AlN but less than the decomposition potentials of the electrolytes used. It is important to note from Figure 1 that AlN is more stable than Ca 3 N 2 or Li 3 N, a byproduct of Eq.…”
Section: A Thermodynamic Evaluationsmentioning
confidence: 99%
“…Ueda et al [9,10] recently investigated a molten salt process to recover Al from A356.0 casting alloy dross. In their process, a floating separation of the Al alloy from the oxides in the dross and subsequent electrolysis of the oxides were carried out in a molten salt bath of 33 mol pct AlF 3 , 51 mol pct NaF, and 16 mol pct BaCl 2 at 1073 K. However, the possibility of recovering Al from AlN in the dross that sometimes contains up to 30 wt pct AlN has not been studied experimentally since there was no AlN present in their dross.…”
Section: Introductionmentioning
confidence: 99%
“…To date, MOE for ironmaking is a laboratory-proven extraction technology ( Fig. 1) [12,16,17], and is foreseen as scalable considering its analogies with molten salt electrolysis, which is used to produce several millions of tonnes of metals such as Al [18,19], Mg [20,21], Li [22,23], Mn [24,25] and rare earth metals [26][27][28][29].…”
Section: Introductionmentioning
confidence: 99%