Method for regulating combustion loss of coal ash

Details Method for regulating combustion loss of coal ash Method for regulating combustion loss of coal ash

1997-04-18

1998-12-08

Marcantoni, Paul

Compositions: coating or plastic

Coating or plastic compositions

Inorganic settable ingredient containing

106DIG1, 264DIG49, C04B 1806

Patent

active

058463135

ABSTRACT:
A method for regulating the quality, such as the combustion loss values, of coal ashes so as to make the same suitable for use in cements is disclosed. The method includes mixing ashes having high combustion loss values with fly ashes having low combustion loss values so that the high combustion loss ashes can be used in cements. The ashes are preferably burned prior to the mixing step in order to reduce residual carbon and oily substances present in the ashes. Bottom ashes collected at the bottom of furnaces are ground and fired to have a combustion loss value and a particle size close to those of fly ashes.

REFERENCES:
patent: 4992102 (1991-02-01), Barbour
patent: 5299692 (1994-04-01), Nelson et al.
patent: 5375925 (1994-12-01), Elkin
patent: 5405441 (1995-04-01), Riddle
patent: 5513755 (1996-05-01), Heavilon et al.
patent: 5534058 (1996-07-01), Strabala
patent: 5622556 (1997-04-01), Shulman
"Pavement Construction with High Volume Class C and Class F Fly Ash Concrete" Naik et al.; ACI Mater. J. (1995), 92(2), pp. 200-210.

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