PURPOSE: To contrive the simplification of a process and energy saving, in a method for manufacturing lightweight aggregate from sludge, by kneading dehydrated sludge with dried sludge, granulating the formed mixture, drying it, partially baking it and then sintering it.
CONSTITUTION: Dehydrated sludge together with dried sludge is charged in a granulating machine 1, formed therein into fine particles by granulation, charged in a drier 2 and then dried with a heating medium. The dried fine-grained sludge is introduced into a partial baking oven 5, partially baked therein at a predetermined temp., and then sintered in a sintering oven 8 of a predetermined temp. Hereon, the drier 2 is pref. a fludized bed type to dry sludge by heat exchange in a heat exchanger 4, the oven 5 is pref. a sand-free fluidized one whose inner temp. is controlled by a heat exchanger 7, and the oven 8 is pref. a vertical continuous gas stream baking one. Exhaust gases from the ovens 5, 8 are collected and used in a boiler 9 for utilizing it as a heat source for the heating medium in the drier 2. A part of exhaust gas from the drier 2 is used as a gas for fluidization in the drier 2 by a cyclone 11, while the remainder is utilized in a heat exchanger 13 by sending it through a condenser 12 to said heat exchanger.
OKADA KAZUO
KUDOU HIROSHI
ABE KOUZOU
YOKOYAMA MASAHIRO
OOTSUKA HIROYASU
CHUGAI RO KOGYO KAISHA LTD
MITSUI MINING & SMELTING CO
NITTETSU MINING CO LTD
| JPS57133295A | 1982-08-17 | |||
| JPS51138078A | 1976-11-29 | |||
| JPS51113352A | 1976-10-06 | |||
| JPS50136969A | 1975-10-30 | |||
| JPS58145815A | 1983-08-31 |