Recovery of Zircon From Investment Casting Molds
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Published Date:1/1/1985
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Personal Authors:
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Description:The Bureau of Mines conducted physical and chemical beneficiation studies on three samples of waste investment casting molds to devise a method to liberate and recover zircon. Rod mill grinding, autogenous attrition grinding, and caustic leaching were liberation methods inves-tigated. Flotation, gravity separation, and caustic leaching and sizing were recovery methods investigated. Flotation techniques produced con-centrates 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.
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