EFFECT OF FLUID CATALYTIC CRACKING CATALYST WASTE ON REFRACTORY CASTABLE'S PROPERTIES

Fluid catalytic cracking (FCC) catalyst waste (CW) is eroded catalyst debris from the cracking unit, which is collected by an electrostatic precipitator. CW is a zeolite material, the unique properties of which are underused in refractory castable production technology. Untreated CW and thermally tr...

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Bibliographic Details
Published in:Ceramics (Praha) 2014-01, Vol.58 (4), p.288-295
Main Authors: Pundiene, I, Antonovic, V, Stonys, R
Format: Article
Language:English
Subjects:
Additives
Castability
Castable refractories
Catalysts
Cements
Compressive strength
Hydration
Wastes
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Summary:Fluid catalytic cracking (FCC) catalyst waste (CW) is eroded catalyst debris from the cracking unit, which is collected by an electrostatic precipitator. CW is a zeolite material, the unique properties of which are underused in refractory castable production technology. Untreated CW and thermally treated (CWt) are considered. The hydration and structure development of cementitious compositions with CW and CWt were investigated. Compared with CW, CWt is a considerably softer accelerating additive of cement hydration and a certain amount of this additive (10-20%) markedly increases the compressive strength of cementitious stone. The impact of CWt additive on refractory castable properties was studied. It was established that increasing CWt additive content increases the compressive strength and decreases the shrinkage of the castable, ensuring a more compact structure of the castable and the optimum thermal durability versus a castable without the additive.
ISSN:0862-5468