Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – By mechanically introducing gas into material
Patent
1983-03-08
1986-12-09
Czaja, Donald
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
By mechanically introducing gas into material
264346, 501113, C04B 3332
Patent
active
046279482
ABSTRACT:
In a method of manufacturing sintered dolomite having raw densities exceeding about 3.0 grams per cubic centimeter in a shaft kiln from ground raw dolomite briquetted or pelletized into shaped bodies, the steps include deacidifying and heating the shaped bodies to a temperature of at least 1000.degree. C. in an upper region of the shaft kiln in a preheating and deacidifying zone heated with fuels of a low thermal content, thereafter sintering the shaped bodies in a lower sintering zone heated with fuels of high thermal content, so as to heat the shaped bodies to a temperature of about 1600.degree. C. to about 2000.degree. C., and subsequently passing the sintered bodies into a lower cooling zone, cooling the bodies therein, and, thereafter, discharging the sintered bodies from the shaft kiln.
REFERENCES:
patent: 3384569 (1968-05-01), Peet
patent: 3475319 (1969-10-01), MacLaren
patent: 3562143 (1971-02-01), Jagel, Jr. et al.
Ceramic Industry Magazine, Jan. 1975, pp. 59-60.
Industrial Minerals and Rocks, Raymond Birch, Amer. Inst. of Mining and Metallurgical Engineers, 1937, pp. 433-448.
Industrial Ceramics, Felix Singer and Sonja Singer, Chapman Hill Ltd, 1963, pp. 1257-1260.
Chmiel Max
Opitz Dieter
Roeder Alfred
Zepter Karl H.
Czaja Donald
Dolomitwerke GmbH
Fertig Mary Lynn
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