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Scrap treatment method

Patent ·
OSTI ID:6121444
;
The method of the invention is useful in treating a wide variety of rare earth-transition metal alloy scrap wherein the scrap comprises (a) one or more transition metals such as Fe, Co and Ni, (b) one or more rare earth such as Nd, Dy, Tb, Pr, Sm, Ho, La, Ce, Eu, Gd, Er, Tm, Yb, Lu, Y, and Sc and (c) other optional alloyants such as boron, Zr, Nb, Ga, Al and others. In treating rare earth-transition metal alloy scrap including two or more rare earth metals (e.g., Tb-Dy-Fe), the method of the invention is effective to recover mixed rare earth salts which can be treated further for use in the thermite or other metallothermic reduction processes.
Research Organization:
Bureau of Mines, Washington, DC (USA)
Assignee:
Bureau of Mines, Washington, DC (US)
Patent Number(s):
A US 7-602491
OSTI ID:
6121444
Country of Publication:
United States
Language:
English

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Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320305* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Industrial Waste Management
ALLOYS
ALUMINIUM ALLOYS
BORON
CERIUM ALLOYS
CHEMICAL REACTIONS
COBALT ALLOYS
DISPERSIONS
DYSPROSIUM ALLOYS
ELEMENTS
ERBIUM ALLOYS
EUROPIUM ALLOYS
GADOLINIUM ALLOYS
GALLIUM ALLOYS
HOLMIUM ALLOYS
IRON ALLOYS
LANTHANUM ALLOYS
LUTETIUM ALLOYS
MANAGEMENT
MATERIALS RECOVERY
METALS
MIXTURES
NEODYMIUM ALLOYS
NICKEL ALLOYS
NIOBIUM ALLOYS
PRASEODYMIUM ALLOYS
PROCESSING
RARE EARTH ALLOYS
RARE EARTHS
RECOVERY
REDUCTION
SALTS
SAMARIUM ALLOYS
SCANDIUM ALLOYS
SCRAP
SCRAP METALS
SEMIMETALS
SOLID WASTES
TERBIUM ALLOYS
THERMITE PROCESS
THULIUM ALLOYS
TRANSITION ELEMENT ALLOYS
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
YTTERBIUM ALLOYS
YTTRIUM ALLOYS
ZIRCONIUM ALLOYS