焼却灰溶融炉における溶融塩の分解方法

Japanese Patent JP3582117

B2

PURPOSE: To collect metal compositions in salts as a metal or a metal oxide and stabilize and try to be harmless by installing a process which processes incinerated ashes by melting and a process which decomposes electrically molten salt and a process which takes a metal oxide into a slag or metal phase. CONSTITUTION: During the starting time of a melting furnace 1, power is supplied between both upper and lower electrodes 12A and 12B by operating a power supply means 2. A substance to be dissolved, such as flying ash, which is charged into the molting furnace 1 is arranged to be molten. During this operation, the upper electrode 12A is lowered by operating an electrode lift means 3 and placed in contact with the lower electrode 12B or the like, thereby generating an arc where the dissolved substance X or the like is melted. When DC power is supplied in a constant current state where the upper electrode 12A is assumed to be positive electricity while the lower electrode 12B is assumed to be negative electricity, a constant ion current flows in the dissolved substance, thereby decomposing electrically the salts contained in the dissolved substance and forming separately a salt phase A, a slab phase B and a metal phase C based on a differential specific weight. The metal and the metal oxide are impregnated and absorbed into the slag phase B or the metal phase C.

Junya Nishino
Jujiro Umeda
Kenji Sakurai
Tetsuya Watanabe

JP29355994A

October 27, 2004

November 28, 1994

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Ishikawajima Harima Heavy Industries Co., Ltd.

B09B3/00; C25C7/08; F27D15/00; F23J1/00; (IPC1-7): F23J1/00; B09B3/00

JP7077318A

WO1993020252A1
WO1995017981A1

Masatake Shiga
Takashi Watanabe
Shigeo Naruse

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