Filtration of inclusions from molten metal alloy

Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes

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75 68R, 75 93AC, 266227, 210774, 210289, C22B 2106

Patent

active

044949855

ABSTRACT:
The invention provides a filter apparatus and method for removing inclusions from a molten metal alloy and includes a container having an inlet portion and an outlet portion. A filter bed is located within said container, interposed between said container inlet and said container outlet, and is comprised of a plurality of filter zones arranged in progressive layers. Each of the filter zones contains particles of filter material within a preselected size range, and the filter zones are successively arranged to selectively locate the largest filter particles at the container outlet and the smallest filter particles at the container inlet. Molten metal alloy is filtered by passing it through the filter bed.

REFERENCES:
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patent: 3737305 (1973-06-01), Blayden et al.
patent: 4142571 (1979-03-01), Narasimhan
patent: 4277280 (1981-07-01), Montgrain
patent: 4334990 (1982-06-01), du Manoir de Juaye et al.
patent: 4413813 (1983-11-01), Pryor
S. K. Saxena, "Kinetics of Aluminum Deoxidation of Liquid Steel" 1980, No. 6, pp. 281-286.
T. A. Engh, et al. "A Fluid Mechanical Model of Inclusion Removal" 1975, pp. 49-58.
S. K. Saxena, et al. "Mechanism of Clogging of Tundish Nozzle in Continuous Casting of Aluminum Killed Steel" May 1974.
P. Galeta, et al. "Assessment of Tundish Nozzle Blockage Mechanisms--Mathematical Modeling Approach" 1981.
The "Selee" brochure of Consolidated Aluminum distributed in 1981.
R. Mutharasan, et al. "A Laboratory Investigation of Aluminum Filtration Through Deep Bed and Ceramic Open-Pore Filters" Dec. 1981, pp. 12-17.
S. N. Singh, "Mechanism of Alumina Buildup in Tundish Nozzles During Continuous Casting of Aluminum-Killed Steels" Oct. 1974, pp. 2165-2178, vol. 5.
Consolidated Aluminum's "Selee System: Two Syllables That Could Change Your Life", 33 Metal Producing, Mar. 1978.

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