Verwertung von Reststoffen beim Aluminium-Recycling

Prillhofer, Ramona; Prillhofer, Bernd; Antrekowitsch, Helmut

doi:10.1007/s00501-008-0360-y

Cited by 11 publications

(24 citation statements)

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“…This technique has the advantage of flexibility, allowing inclusion measurement at any stage of the process chain. [17] It also has the advantage of providing in situ results in the form of flow-rate charts. These charts minimize the need for the time-consuming metallographic examinations of inclusions demanded by other Prefil techniques, such as PoDFA and LAIS.…”

Section: Introductionmentioning

confidence: 99%

“…The literature discusses many techniques for counting inclusions in aluminum [3,[9][10][11][12][13] ; the LiMCA, PoDFA, and LAIS techniques commonly are used, as is the pressure filtration (Prefil) technique commercially known as the Prefil-Footprinter. [14][15][16][17][18][19] The Prefil apparatus is one of the more recent techniques used to determine the cleanliness of liquid aluminum alloys. It measures the relative cleanliness of a melt by comparison with the benchmark inclusion level for a given alloy, production process, or stage in the process.…”

Section: Introductionmentioning

confidence: 99%

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Method Developed for Quantitative Analysis of Inclusions in Solidified Aluminum Ingots

Jaradeh

Carlberg

2010

Metall Mater Trans B

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A deep-etching method was used to determine inclusions in solidified direct chill cast aluminum ingots. The technique was developed to allow easy quantification of the amount and size distribution of inclusions over billet lengths and cross sections. A pressure filtration (Prefil) test also was used to verify molten alloy cleanliness during casting, and the results of these measurements then were compared. The amount and distribution of nonmetallic inclusions were analyzed, as determined using a NaOH deep-etching method over billet lengths and cross sections. A higher inclusion count was observed at both billet ends, with more inclusions located nearer the billet section centerline. Furthermore, the inclusion density in the radial direction at every distance along the billet length was distributed inhomogeneously. Differences were observed between Prefil samples taken at different casting stages. The Prefil curves and metallographic analysis of Prefil residue obtained from melt samples, at an early casting stage or before degassing, indicate more oxides than in a melt sample taken under steady-state casting conditions. A reasonable correlation was established between the number of inclusions in the molten alloy (measured using Prefil and LiMCA) and the etch pits on deep-etched surfaces of billet cross sections.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Method Developed for Quantitative Analysis of Inclusions in Solidified Aluminum Ingots

Jaradeh

Carlberg

2010

Metall Mater Trans B

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“…Environmental concern regarding dross disposal gives additional motivation for using it as a resource. The landfill disposal of dross is prohibited in European countries [14,15] because dross can react with water and release explosive and noxious gases [16,17]. Therefore, beneficial reuse or recycling of dross, instead of using expensive treatment methods to discard it, can offer both economic and environmental gains.…”

Section: Reuse and Reprocessing Of Drossmentioning

confidence: 99%

Data Mining Toward Increased Use of Aluminum Dross

Chang

Olivetti

Fjeldbo³

et al. 2015

J. Sustain. Metall.

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Recycling provides a key strategy to move toward a more sustainable society by partially mitigating the impact of fast-growing material consumption. One main barrier to increased recycling arises from the fact that in many real world contexts, the quality of secondary (or scrap) material is unknown and highly variable. Even if scrap material is of known quality, there may be finite space or limited operational flexibility to separate or sort these materials prior to use. These issues around identification and grouping given the operational constraints create limitations to simply developing an appropriate sorting strategy, let alone implementing one. This study suggests the use of data mining as a strategy to manage raw materials with uncertain quality using existing data from the recycling industry. A clustering analysis is used to recognize the pattern of raw materials across a broad compositional range in order to provide criteria for grouping (binning) raw materials. This strategy is applied to an industrial case of aluminum recycling to explore the benefits and limitations in terms of secondary material usage. In particular, the case investigated is around recycling industrial byproducts (termed dross for the case of the aluminum industry). The binning strategy obtained by the clustering analysis can significantly reduce material cost by increasing the compositional homogeneity and distinctiveness of uncertain raw materials. This result suggests the potential opportunity to increase low-quality secondary raw material usage before investment in expensive sorting technology.

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“…Der oxidische Rückstand kann je nach Zusammensetzung in alternativen Industriebereichen Einsatz finden, bei denen Al 2 O 3 als Ausgangsprodukt dient 35,39 . Die Verwendung von oxidischen Rückständen in der Beton-bzw.…”

Section: Weiterverwendung Von Rückständen Der Krätze-und Salzschlackeunclassified

“…Die Verwendung von oxidischen Rückständen in der Beton-bzw. Zementindustrie ist unter bestimmten Voraussetzungen möglich 35 . Der Cl-Gehalt spielt dabei eine wesentliche Rolle, da dieser ab einer bestimmten Grenze unweigerlich zur Korrosion der Stahlbewährung führt 39 .…”

Section: Weiterverwendung Von Rückständen Der Krätze-und Salzschlackeunclassified