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Evaluation of Refractories for Aluminum Recycling Furnaces.

Authors
Davis-EG
Source
MISSING :8 pages
Link
NIOSHTIC No.
10006168
Abstract
Under a memorandum of agreement with Reynolds Metals Company, Richmond, Virginia, the Bureau of Mines studied the problem of corundum formation on refractory linings in aluminum recycling furnaces. A laboratory test was developed for evaluating refractories in contact with molten recycled aluminum and identifying the mechanism of corundum formation. A test apparatus was designed and constructed to evaluate the performance of refractory samples. Corundum mechanism formation studies indicated that corundum forms on refractories when there is metal penetration. Once corundum forms, it acts as a wick allowing the molten aluminum to move to the surface where it is oxidized, thus causing further growth of the corundum. Phosphoric acid treatment or a spinel mortar coating prevented corundum formation on the 70- and 90-pct-al2o3 refractories.
Publication Date
19880101
Document Type
IH; Report of Investigations;
Fiscal Year
1988
NTIS Accession No.
NTIS Price
Identifying No.
RI 9178
NIOSH Division
SRC;
Source Name
MISSING
State
VA;
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