Scrap treatment method

Patent · Wed Oct 24 00:00:00 EDT 1990

OSTI ID:6121444

Lyman, J; Palmer, G

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 (United States)
• Assignee: Bureau of Mines, Washington, DC (US)
• Patent Number(s): A US 7-602491
• OSTI ID: 6121444
• Country of Publication: United States
• Language: English

Related Subjects

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