Method for expanding perlite

Details Method for expanding perlite Method for expanding perlite

1977-11-08

1979-12-18

Camby, John J.

Heating

Processes of heating or heater operation

Including melting, vaporizing, sintering, expanding...

252378P, F27B 1500

Patent

active

041792645

ABSTRACT:
Particulate unexpanded perlite is introduced to an expansion apparatus that utilizes the combustion of a gas as a source of heat. The particulate perlite is mixed with a combustible gas, air from a first source and oxygen and thereafter introduced to a burner section. The amount of oxygen introduced is in the range of from 1.5 to 16 weight percent of the amount of air introduced. The amount of combustible gas in the mixture is related to the air input from the first source, being in the range of 1 volume of combustible gas to 2 to 6 volumes of air.

REFERENCES:
patent: 2431884 (1947-12-01), Neuschotz
patent: 2602782 (1952-07-01), Zoradi
patent: 2676892 (1954-04-01), McLaughlin
patent: 3201099 (1965-08-01), Carpenter

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