NIOSHTIC-2 Publications Search
Recycling zircon from investment casting molds.
Smith-CW; Llewellyn-TO; Sullivan-GV
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
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.
Metallurgical-processes; Metallurgy; Waste-treatment; Metals
OP; Conference/Symposia Proceedings
Taylor-PR; Sohn-HY; Jarrett-N
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
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division