Method of using sludge for making ceramic articles

Details Method of using sludge for making ceramic articles Method of using sludge for making ceramic articles

1974-06-10

1978-09-05

Pavelko, Thomas P.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Of inorganic materials

106 72, 106 736, 264 56, 264 64, C04B 3332, C04B 3564

Patent

active

041120337

ABSTRACT:
A method of utilizing sewage and/or industrial, e.g. poisonous sludges for making bricks or other ceramic articles. Sludge is mixed with clay to form a mixture of approximately 30 to 50% sludge. The mixture may then be stored, and is extruded by conventional means. After extrusion and cutting or shaping, the articles are dried in a dryer and fired in a kiln. Preferably, the exhaust gases from the dryer are vented into the kiln as combustion gases, where odors or poisonous compounds of the exhaust air are destroyed. Also, used or waste oil may be added during mixing to lessen odors and to supply extra heat during firing in the kiln. The products so produced are substantially indistinguishable from conventional products, except that their insulating properties are enhanced.

REFERENCES:
patent: 172357 (1976-01-01), Walsh
patent: 3886244 (1975-05-01), Bayer et al.
patent: 3886245 (1975-05-01), Bayer et al.
H. H. Nakamura et al., "Use of Bauxite Wastes for Lightweight Building Products", Ceramic Bulletin, No. 50, Mar. 1971, pp. 248-250.

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