METALLOTHERMIC METHOD FOR RECOVERING RARE-EARTH METALS FROM FLUORIDES THEREOF USED FOR PRODUCING ALLOYS AND BATCH FOR CARRYING OUT SAID METHOD.

WIPO Patent Application WO/2002/090606

A1

The inventive reduction method for recovering rare-earth metals from fluorides thereof used for producing alloys consists in blending a batch, transporting and loading the prepared batch into a reaction crucible, initiating a metallothermic reaction, thereby producing the melt of metallic and slug phases, cooling and unloading obtained products. In 3-7 minutes after the initiation of the metallothermic reaction, the obtained melt is isolated from the environment with the aid of a metallic lid until the cooling is over, the walls thereof are exposed to dynamic action during 2-3 minutes. The batch for recovering the rare-earth metals from the fluorides thereof using the metallothermic method contains: Aluminium powder 1-25 mass % Metal calcium 25-35 mass % Preheating additive 14-35 mass % Calcium fluoride 1-10 mass % The rest being fluorides of rare-earth metals.

VERKLOV MIKHAIL MIKHAILOVICH (RU)
VASILIEV ANATOLY ALEXEEVICH (RU)
ZOTS NIKOLAI VLADIMIROVICH (RU)

PCT/RU2001/000155

November 14, 2002

April 18, 2001

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VERKLOV MIKHAIL MIKHAILOVICH (RU)
VASILIEV ANATOLY ALEXEEVICH (RU)
ZOTS NIKOLAI VLADIMIROVICH (RU)

C22B5/04; C22B59/00; C22C28/00; (IPC1-7): C22B59/00; C22B5/04

WO1998015667A1

1998-04-16

RU2061078C1	1996-05-27
RU2060290C1	1996-05-20
RU2103402C1	1998-01-27
EP0265413A2	1988-04-27

Andreev, Vladimir Ivanovich (RU)

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