The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 30, 2002
Filed:
Jan. 03, 2000
NKK Corporation, Tokyo, JP;
Abstract
A component adjustor is added to an incineration residue containing salts to adjust a component ratio determined by the equation (Ca+Mg)/(Si+Al) in the range of 0.7 to 2.0. The incineration residue having the adjusted component ratio is charged to a melting furnace maintained in a reducing atmosphere to form a melt. The melt is separated into a molten slag layer, a molten salt layer, and a molten metal layer. The molten slag is fractionated and discharged from the melting furnace. The discharged molten slag is rapidly cooled. The temperature of the vapor phase in the melting furnace is maintained at 700 to 1000° C. A non-oxidizing gas is blown into the vapor phase in the melting furnace to increase the amounts of exhaust gases exhausted from the melting furnace.