Melting and Melt Treatment of Aluminum Alloys

Neff, David V.; Sigworth, Geoffrey K.; Gallo, Rafael

doi:10.31399/asm.hb.v02a.a0006535

Cited by 4 publications

(1 citation statement)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This technology includes various modifications whose history has been described by [24]. Currently, refining by inert gas using a submersible rotation device, called a foundry degassing unit (FDU), is used to refine the aluminium melt and reduce the content of hydrogen and other impurities [9,25,26]. The submersible device is composed of a hollow shaft and a rotor that blows the refining gas into the melt.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Degassing Efficiency on a Foundry Degassing Unit Using Different Rotor Types

Kolínský,

Prášil,

Socha

et al. 2024

Applied Sciences

View full text Add to dashboard Cite

The present paper describes a comparison of the efficiency of different types of rotors used in the refining of aluminium melt at a foundry degassing unit (FDU). Physical modelling was used to obtain data for six different rotor types under defined experimental conditions. In order to evaluate the data from the physical model, an evaluation method based on the interpolation of degassing curves was developed in such a way that the resulting characteristic can be expressed by a single parameter. Using the new methodology, the datasets were replaced by a single dimensionless parameter, a, which characterizes the rotor performance at a given gas flow rate. Based on the comparison of these performance parameters, it was possible to mutually compare the rotor efficiency depending on the selected conditions. The comparison is also demonstrated on the expected degassing time to a certain required concentration. Based on the physical model results, the study found that rotor D had the highest degassing efficiency, followed by rotors F and A. Rotors B and E had similar efficiency at a flow rate of 17 Nl·min−1. However, rotor B showed better efficiency at higher inert gas flow rates (19 and 21 Nl·min−1), while rotor E showed better efficiency at lower flow rates (13 and 15 Nl·min−1).

show abstract

Section: Introductionmentioning

confidence: 99%

Comparison of Degassing Efficiency on a Foundry Degassing Unit Using Different Rotor Types

Kolínský,

Prášil,

Socha

et al. 2024

Applied Sciences

View full text Add to dashboard Cite

show abstract

Thermodynamic Modeling of Solid Flux Interactions with Molten Aluminum

Moodispaw,

Cinkilic,

Luo

2024

Inter Metalcast

View full text Add to dashboard Cite

Oxide and dross formation during aluminum melt processing results in a considerable amount of loss of metallic aluminum. The total melt loss generated during melt processing can be greatly reduced by efficient use of flux, particularly for melting aluminum scrap or secondary alloys. Effective use of cover fluxes can significantly reduce dross generation by creating a barrier between the metallic aluminum and the atmosphere. The amount of metallic aluminum trapped within the dross layer can also be reduced by up to 50% using drossing fluxes. However, reducing the industrial average melt loss has remained difficult. To evaluate flux ingredients used in the casting industry, computational thermodynamic software ThermoCalc was used to calculate the driving force for reactions between twenty-one flux ingredients and eighteen common alloying and impurity elements in foundry alloys. The thermodynamic calculations, combined with other properties, were used to provide a desirable list of cover and drossing ingredients, which are being experimentally validated.

show abstract

Research of process factors increasing metal yield during aluminum waste remelting

Гущин

Shpilev

Медведев

2021

Izv.VUZ. Tsvet. Met.

View full text Add to dashboard Cite

The article presents the results of research determining the most effective technologies for increasing metal yield in the processing of aluminum-containing waste. In particular, peculiarities of the processes of melting aluminum alloys were analyzed using complex methods of furnace and off-furnace processing of charge material containing an increased amount of shovelling scrap and swarf. Studies on the impact of charge preparation and aluminum remelting technology were carried out in SAT-0,16 and IAT-0,4 furnaces on the АК12М2 alloy. Experiments proved that batchwise loading 20 kg of swarf briquette preheated to 300–400 °C into the SAT-0,16 furnace with the addition of flux (composition: NaCl – 50 %; KCl –35 %, Na3AlF6 – 15 %) in the amount of 3 % of total metal mass is the most efficient technology. This technology makes it possible to achieve a metal yield of about 94 %. The study of the remelting technology influence on IAT-0,4 furnace metal yield showed that the greatest effect can be obtained in case of furnace charge (95 kg swarf briquette) by batches of 2 kg into the 7 kg liquid bath with modifier flux (composition: NaCl – 62 %; KCl – 13 %, NaF – 25 %) added in the amount of 2 % from the total metal mass. This technology provides up to 93.5 % of metal yield. Data from 10 series of 5–9 melts were also analyzed with the comparison of metal yield results depending on the mass of briquetted swarf charged into the furnace. A histogram of the change in the porosity of AK12M2 and AK9 samples depending on the content of swarf in the charge (from 0 to 45 %) during remelting. It was found that an increase in the content of swarf in the charge, all other things being equal, leads to an increase in the average porosity score, which indicates the need for additional refining of such melts.

show abstract

Melting and Melt Treatment of Aluminum Alloys

Cited by 4 publications

References 8 publications

Comparison of Degassing Efficiency on a Foundry Degassing Unit Using Different Rotor Types

Comparison of Degassing Efficiency on a Foundry Degassing Unit Using Different Rotor Types

Thermodynamic Modeling of Solid Flux Interactions with Molten Aluminum

Research of process factors increasing metal yield during aluminum waste remelting

Contact Info

Product

Resources

About