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Recycling zircon from investment casting molds.

Authors
Smith-CW; Llewellyn-TO; Sullivan-GV
Source
Recycle and secondary recovery of metals: proceedings of the International Symposium on Recycle and Secondary Recovery of Metals and the Fall Extractive and Process Metallurgy Meeting, December 1-4, 1985, Fort Lauderdale, Florida. Taylor PR, Sohn HY, Jarrett N, eds. Warrendale, PA: Metallurgical Society, 1987 Feb; :665-674
Link
NIOSHTIC No.
10005105
Abstract
The Bureau of Mines, U.S. Department of the Interior, conducted physical and chemical beneficiation studies on three samples of waste investment casting molds to develop a method to liberate and recover zircon. Rod-mill grinding, autogenous attrition grinding, and caustic leaching were the liberation methods investigated. Flotation, gravity separation, and caustic leaching and sizing were the recovery methods investigated. Flotation techniques produced concentrates containing up to 74.2 pct zircon with a zircon recovery of 53.4 pct. Gravity concentration produced concentrates containing up to 98.6 pct zircon; however, recovery of the zircon was only 57 pct. Caustic leaching and sizing produced concentrates containing up to 98 pct zircon with attendant recoveries of 81 pct.
Keywords
Metallurgical-processes; Metallurgy; Waste-treatment; Metals
Publication Date
19870201
Document Type
OP; Conference/Symposia Proceedings
Editors
Taylor-PR; Sohn-HY; Jarrett-N
Fiscal Year
1987
NTIS Accession No.
NTIS Price
ISBN No.
9780873390071
Identifying No.
OP 56-86
NIOSH Division
TURC
Source Name
Recycle and secondary recovery of metals: proceedings of the International Symposium on Recycle and Secondary Recovery of Metals and the Fall Extractive and Process Metallurgy Meeting, December 1-4, 1985, Fort Lauderdale, Florida
State
PA;
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