JPS6333433B

• Main Authors: KAWAMURA MITSUTAKA, OOTAKE TAKESHI, UCHIDA KUNIO
• Format: Patent
• Language: English
• Published: 05.07.1988
• Subjects: DISPOSAL OF SOLID WASTE; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLIDMATERIALS OR FLUIDS; PERFORMING OPERATIONS; RECLAMATION OF CONTAMINED SOIL SOIL; SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATICTABLES OR JIGS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS; SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATICTABLES OR JIGS; TRANSPORTING

PURPOSE:To obtain a molded solidified object availably utilized as an aggregate material, by a method wherein a combustible substance is added to coal ash according to necessity to mold the same into a desired shape and the molded coal ash is sintered by subjecting the same to self-combustion in a shaft type fluidized layer. CONSTITUTION:Coal ash containing a small amount of C collected by the electric dust collector of a coal steam power plant is kneaded with about 15% to coal ash of a liquid prepared, for example, by mixing a pulp waste liquor 2 and water 3 in a ratio of about 1:3 as a granulating binder in a granulator 4 to be granulated. The obtained granule is sent to the top part 5 of a shaft type furnace and contacted with a rising gas while moved downwardly to be subjected to self-combustion. The granule is sintered and cooled while passed through a drying zone 6, a sintering zone 7 and a cooling zone 8. The obtained sintered granule is discharged out of the furnace by an ore discharge machine 9 and classified according to a particle size by a screen 10 to obtain a product 1. When coal ash is low in the C content and lacks in self-combustion force, a combustible substance such as fine powdery coal or waste plastics is added to coal ash.