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CASTABLE REFRACTORY COMPOSITIONS AND THEIR USE IN THE FORMATION AND REPAIRING OF MONOLITHIC REFRACTORY LININGS
The present invention relates to castable refractory compositions based on magnesia aggregates. The compositions according to the invention consist of a plurality of dry components and a plurality of wet components, said castable refractory composition comprising, based on the total weight of the castable refractory composition, between 80 wt.-% and 99 wt.-% of a magnesia aggregate material, between 0.1 wt.-% and 10 wt.-% carbonaceous material, between 0.1 wt.-% and 5 wt.-% antioxidant, and a non-aqueous binder comprising one or more esterified fatty acids, such as esterified vegetable oils or biodiesels. The compositions according to the invention comprise no more than 2 wt.-% water, the fixed carbon in the composition is no more than about 10 wt.-%, and the antioxidant is selected from boron carbide, silicon carbide, silicon nitride, calcium boride, zirconium boride, aluminium metal, zinc metal, silicon metal, barium metal, titanium metal, one more aluminium-magnesium alloys, one or more zinc-magnesium alloys, one or more zinc-aluminium-magnesium alloys, or from combinations thereof. Also part of the present invention is the use of the compositions in casting, vibration casting, spray-casting, gunning, self-flowing, ramming, shotcrete or patching processes, and their method of formation.
CASTABLE REFRACTORY COMPOSITIONS AND THEIR USE IN THE FORMATION AND REPAIRING OF MONOLITHIC REFRACTORY LININGS
The present invention relates to castable refractory compositions based on magnesia aggregates. The compositions according to the invention consist of a plurality of dry components and a plurality of wet components, said castable refractory composition comprising, based on the total weight of the castable refractory composition, between 80 wt.-% and 99 wt.-% of a magnesia aggregate material, between 0.1 wt.-% and 10 wt.-% carbonaceous material, between 0.1 wt.-% and 5 wt.-% antioxidant, and a non-aqueous binder comprising one or more esterified fatty acids, such as esterified vegetable oils or biodiesels. The compositions according to the invention comprise no more than 2 wt.-% water, the fixed carbon in the composition is no more than about 10 wt.-%, and the antioxidant is selected from boron carbide, silicon carbide, silicon nitride, calcium boride, zirconium boride, aluminium metal, zinc metal, silicon metal, barium metal, titanium metal, one more aluminium-magnesium alloys, one or more zinc-magnesium alloys, one or more zinc-aluminium-magnesium alloys, or from combinations thereof. Also part of the present invention is the use of the compositions in casting, vibration casting, spray-casting, gunning, self-flowing, ramming, shotcrete or patching processes, and their method of formation.
CASTABLE REFRACTORY COMPOSITIONS AND THEIR USE IN THE FORMATION AND REPAIRING OF MONOLITHIC REFRACTORY LININGS
FEUERFESTE GIESSMASSEN UND IHRE VERWENDUNG ZUR BILDUNG UND REPARATUR VON MONOLITHISCHEN FEUERFESTEN AUSKLEIDUNGEN
BÉTONS REFRACTAIRES ET LEUR UTILISATION POUR LA FORMATION ET LA RÉPARATION DES REVÊTEMENTS RÉFRACTAIRES MONOLITHIQUES
CHAKRABORTY INDRA NATH (author) / SINHA SAUMEN (author) / BISEN RAJESH TILAKCHAND (author)
2021-01-27
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
| European Patent Office | 2020