METHOD FOR CONCENTRATING GALLIUM COMPONENT FROM PRECIPITATE CONTAINING GALLIUM COMOUND, ABRASIVE GRAIN AND CUTTING OIL

Japanese Patent JP3436176

B2

PROBLEM TO BE SOLVED: To provide a method for concentrating gallium components from the precipitate in which gallium components can stably be concentrated by a simple and compact device without using a large drying furnace and a dust collector and without being influenced by the hygroscopicity of abrasive grains.
SOLUTION: This is a method for concentrating gallium components from a precipitate contg. a gallium compd., abrasive grains and cutting oil and is provided with a 1st stage in which, into a solvent (kerosene) compatible with cutting oil and having the boiling point lower than the thermal decomposition temp. of a gallium compd., cutting oil in the precipitate is dissolved, and, moreover, the gallium compd. and the abrasive grains in the precipitate are dispersed, a 2nd stage in which, for removing the abrasive grains from the solvent in which the gallium compd. and the abrasive grains are dispersed, it is wet-classificated into fine powder mainly contg. the gallium components and coarse powder mainly contg. the abrasive grains to obtain the solvent in which the fine powder is dispersed, a 3rd stage in which the solvent is separated from the solvent in which the fine powder is dispersed to obtain fine powder, and a 4th stage in which the obtd. fine powder is heated at a temp. below the thermal decomposition temp. of the gallium compd., and the remaining solvent is removed from the fine powder.

Kakimoto Execution
Koji Otohata
Takeshi Ueyachi

JP7688499A

August 11, 2003

March 19, 1999

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Sumitomo Metal Mining Co., Ltd.

C22B58/00; (IPC1-7): C22B58/00

JP10140229A
JP9118937A
JP931561A

Shozo Ueda

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