Process for chemical stabilization of heavy metal bearing dusts

Details Process for chemical stabilization of heavy metal bearing dusts Process for chemical stabilization of heavy metal bearing dusts

1989-05-09

1990-03-27

Bell, Mark L.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106120, 106DIG1, 501155, C04B 724, C04B 726, C04B 1126

Patent

active

049117572

ABSTRACT:
A calcium-alumino-silicate composition comprising the reaction product of electric arc furnace dust and/or an aqueous chemical waste sludge including a source of ferrous ions and selective additive materials, the additive materials are selected so that the total composition of the additive ingredients and said sludge includes fly ash, electric arc furnace dust, lime kiln dust, ferrous sulfate, hydrated lime to provide an alkalinity of about 9 to 9.5% and water, the composition contains at least 0.2% by weight of ferrous ions and is hardenable through chemical reactions, the product of which includes calcium-alumino-silicates.

REFERENCES:
patent: Re29783 (1978-09-01), Smith et al.
patent: 3341341 (1967-09-01), Corson et al.
patent: 3634115 (1972-01-01), Minnick
patent: 3720609 (1973-03-01), Smith et al.
patent: 3852084 (1974-12-01), Webster et al.
patent: 4116705 (1978-09-01), Chappell
patent: 4668124 (1987-05-01), Pitts et al.
patent: 4741776 (1988-05-01), Bye et al.

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