Use of dewatered digested sewerage sludge as the bloating agent

Details Use of dewatered digested sewerage sludge as the bloating agent Use of dewatered digested sewerage sludge as the bloating agent

1989-10-17

1990-07-24

Bennet, Henry A.

Heating

Processes of heating or heater operation

Including melting, vaporizing, sintering, expanding...

501155, 106487, 106776, 110342, 110790, 110697, 110486, 110777, C04B 1800, C04B 2000, C04B 2400, C04B 3800

Patent

active

049432338

ABSTRACT:
A process for manufacturing expanded shale aggregate using dewatered digested sewerage sludge as the bloating agent for the shale and using high-lime blast furnace slag as the fluxing agent to lower the melting temperature of the mix and also using refuse derived fuel as the main fuel in the kiln.

REFERENCES:
patent: 2414734 (1947-01-01), Gelbman
patent: 3801262 (1974-04-01), Karkowski et al.
patent: 3957528 (1976-05-01), Ott et al.
patent: 3963506 (1976-06-01), Shutt et al.
patent: 3998650 (1976-12-01), Schmitt-Henco et al.
patent: 4494928 (1985-01-01), Rohrbach
patent: 4522926 (1985-06-01), Felice
patent: 4592722 (1986-06-01), Heckman
patent: 4797091 (1989-01-01), Neumann
patent: 4874153 (1989-10-01), Hashimoto et al.

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