A Laboratory Investigation of Aluminum Filtration Through Deep-Bed and Ceramic Open-Pore Filters

Mutharasan, Raj; Apelian, Diran; Romanowski, Chris

doi:10.1007/bf03339549

Cited by 16 publications

(8 citation statements)

References 1 publication

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“…This approach, originally developed as part of the granular filtration of hydrosols, [33,34] has been applied to liquid metal depth filtration [16] and, in particular, to liquid aluminum filtration through the CFF. [1,27,30,35,36] It has been found that the dependence of the filter coefficient on the filtration velocity (in the case of liquid aluminum depth filtration) is consistent with the dependence reported in Tien's book. [34] For a 30-ppi CFF with intentionally added TiB 2 inclusions (in sizes ranging from 2 to 8 lm), the filter coefficient varies between 10 to 2 m À1 when the filtration velocity increases from 2 to 20 mmAEs À1 .…”

Section: The Presence Of Inclusions In Aluminum Alloyssupporting

confidence: 80%

“…It is also experimentally established that an increase in the filtration velocity decreases the filtration efficiency, [1,16,28,30] and some brutal variations in the filtration velocity can cause the release of inclusions. [28] The use of a grain-refining rod at the filter inlet was shown to decrease the filtration efficiency; the effect was significant in the case of high inclusion loading (N15 of approximately 10 k/kg).…”

Section: The Presence Of Inclusions In Aluminum Alloysmentioning

confidence: 99%

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Pilot-Scale Investigation of Liquid Aluminum Filtration through Ceramic Foam Filters: Comparison between Coulter Counter Measurements and Metallographic Analysis of Spent Filters

Duval

Riviere

Laé

et al. 2009

Metall Mater Trans B

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International audienceA pilot has been designed to study the mechanisms associated with liquid aluminum filtrationthrough ceramic foam filters (CFFs). Before entering the filtering bowl, the liquid metal isseeded with massive artificial inclusions. A theoretical analysis of the filtration of massiveinclusions shows that there are two preponderant deposition mechanisms, i.e., direct interceptionand sedimentation, which explain qualitatively the effect of the operating conditions on themeasured filtration efficiency. Furthermore, it is observed that the filtration efficiency measuredby two Coulter counters reaches a minimum value for a diameter close to 30 µm. This nonmonotonoustrend can be explained by the coexistence of two populations of inclusions,intentionally added massive ones and oxide films. It is expected that oxide films are the mostnumerous inclusion type for diameters less than 25 µm and have an apparent volume muchlarger than their absolute volume (contrary to massive inclusions), leading to a higher filtrationefficiency. In addition, a metallographic analysis of spent filters shows that the density of thecaptured massive inclusions decreases exponentially between the filter inlet and the filter outlet.The initial filter coefficient can be derived, which is equal to 25 m^-1 for a 30-ppi filter grade(with a specific surface area of 1610 m^-1), SiC inclusions 50 µm in diameter, and a filtrationvelocity of 0.9 cm.s^-1

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Section: The Presence Of Inclusions In Aluminum Alloyssupporting

confidence: 80%

Section: The Presence Of Inclusions In Aluminum Alloysmentioning

confidence: 99%

Pilot-Scale Investigation of Liquid Aluminum Filtration through Ceramic Foam Filters: Comparison between Coulter Counter Measurements and Metallographic Analysis of Spent Filters

Duval

Riviere

Laé

et al. 2009

Metall Mater Trans B

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show abstract

“…In fact, the filtration of aluminum has been an effective commercial process for over 15 years (24). Some newer developments in high-temperature ceramic filters have resulted in: 1) extruded, continuous, fixedpore geometry ceramic monoliths and, 2) reticulated (foam), openpore ceramic foams (25,26). The ceramic foams are currently available in a variety of refractory compositions and pore sizes, and generally contain 75 to 90 percent of volume of open pores.…”

Section: Melt Purification By Filtrationmentioning

confidence: 98%

Recent Advances in Solidification Processing

Apelian

1985

Innovations in Materials Processing

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“…Their development speeded up during the eighties of the twentieth century [8][9][10] specifically for filtration in metal smelting applications.…”

Section: Introductionmentioning

confidence: 99%

Experience on a Low Cost Way to Obtainal-Ti Ceramic Foams

2015

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An experience on a simple process for producing alumina-rutile-mullite ceramic foams by using aqueous particulate slurries is proposed. The sintering process is achieved in one unique thermal process at 1200 ºC in air. The description of the process, physical properties and morphological studies are reported. Microstructure is studied by using confocal optical microscopic technique. The highly active porous foam structure of this ceramic material produced according to the low-cost process presented here could extend its use in a broad range of applications, such as catalytic, biomedical scaffolds, filtering, etc.

show abstract

A Laboratory Investigation of Aluminum Filtration Through Deep-Bed and Ceramic Open-Pore Filters

Cited by 16 publications

References 1 publication

Pilot-Scale Investigation of Liquid Aluminum Filtration through Ceramic Foam Filters: Comparison between Coulter Counter Measurements and Metallographic Analysis of Spent Filters

Pilot-Scale Investigation of Liquid Aluminum Filtration through Ceramic Foam Filters: Comparison between Coulter Counter Measurements and Metallographic Analysis of Spent Filters

Recent Advances in Solidification Processing

Experience on a Low Cost Way to Obtainal-Ti Ceramic Foams

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