C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 35/66 (2006.01) C04B 40/00 (2006.01)
Patent
CA 2246565
The cement-free, castable refractory composition for producing dense cast refractories according to the present invention comprises 70-98 weight % of refractory aggregate regulated to have a particle size of 10 mm or less, 2-30 weight % of ultrafine refractory powder having a particle size of 10 µm or less, and 0.01-1.0 weight % (outer percentage), based on 100 weight % of the refractory aggregate + the ultrafine refractory powder, of a dispersing agent. The cement-free, castable refractory composition tempered with water or other tempering liquids to have a castable flowability or the factory-premixed, cement-free, castable refractory composition is conveyed to a gunning nozzle by a pump, and a coagulant is added to the tempered refractory material together with compressed air in the nozzle to carry out gunning.
Composition réfractaire servant à obtenir un produit compact à couler et comprenant un matériau principal exempt de ciment, contenant 70 à 98 % en poids d'agrégat réfractaire, dont la dimension de grain est inférieure à 10 mm, ainsi que 2 à 30 % en poids de poudre réfractaire ultra-fine, dont la dimension de grain est inférieure à 10 mu m, et un dispersant équivalent en quantité à 0,01-1 % en poids du matériau principal. Cette composition pétrie avec de l'eau ou un autre liquide jusqu'à l'obtention de la mollesse souhaitée, est envoyée fortement à un ajutage de pulvérisation par une pompe alimentée en pression, et pulvérisée avec un coagulant sous l'effet d'air comprimé.
Ohta Satoshi
Onizuka Koji
Tanaka Kunio
Smart & Biggar
Taiko Refractories Co. Ltd.
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