Process for manufacturing a hardenable mixture containing coal a

Details Process for manufacturing a hardenable mixture containing coal a Process for manufacturing a hardenable mixture containing coal a

1989-06-13

1991-03-26

Straub, Gary P.

Compositions: coating or plastic

Coating or plastic compositions

Inorganic settable ingredient containing

106707, 106709, 106405, 106DIG1, C04B 726

Patent

active

050026119

ABSTRACT:
Described is the process for forming a hardenable mixture of a coal ash comprising free CaO and free CaSO.sub.4 .OH.sub.2 O.
In order to remove all free CaO the coal ash is mixed with a fly-ash comprising essentially no free CaO and no free CaSO.sub.4.OH.sub.2 O and water and subsequently subjected to a heat treatment.
by removal of free CaO it is found that the strength of hardened granules formed from such as mixture does not deteriorate as is the case form granules formed with a coal ash comprising free CaO.
Also a process for forming hardened granules and a building component formed with use of a hardenable mixture according to the invention are described.

REFERENCES:
patent: 2833659 (1958-05-01), Bauer
patent: 4316583 (1982-02-01), Kawano et al.
patent: 4624711 (1986-11-01), Styron
patent: 4741834 (1988-05-01), Spangle et al.
patent: 4780144 (1988-10-01), Loggers

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