Abstract: The invention relates to the method for hot repairing various kinds of pig iron and steel making furnaces wherein a hot repairing material made in the state of slurry by adding 10-50 weight % water to a monolithic refractory comprising refractory and/or carbon-containing granulated particles and a binder is projected onto a worn part necessitating repairs in the high temperature furnace, the water in the projected hot repairing material boiling under the high heat in the furnace whereby said repairing material is not only fully mixed but also permitted to flow into the minutest recesses of the part necessitating repairs, said repairing material being hardened with the termination of the boiling thereby enabling to form in the worn part a fabricated body having high packing, strength and corrosion resistance.

Abstract: A process for gasifying liquid and solid hydrocarbons by contact at elevated temperature with a novel hydrocarbon gasifying catalyst comprising K.sub.2 O--CaO--Al.sub.2 O.sub.3 containing from about 5 to 15% by weight K.sub.2 O, from about 0.1 to 7% CaO, and from about 78 to 94.9% Al.sub.2 O.sub.3.

Abstract: The invention relates to precluding the shortcomings intrinsic to the conventional unburned carbon-containing refractory bricks, i.e., oxidization under high temperature conditions and the incidental decarbonization, the phenomenon of exfoliation and detachment of the fragile layers, and more particularly to obtaining thereby unburned carbon-containing refractory bricks having the high properties by causing refractory brick material comprising substantially more than 1 weight % carbon to contain 1-10 weight % aluminum powder and/or magnesium powder each independently or in a mixture thereof, and/or 0.5-6 weight % silicon powder.

Abstract: The invention relates to carbonaceous bricks having resistance to fire and corrosion, capable of withstanding mechanical impact to which the conventional carbonaceous bricks were vulnerable, and usable in an oxidizing atmosphere, and the method as producing the same. The invention has for an object to obtain carbonaceous bricks having said high properties by mixing less than 60 weight % of inorganic material with 40.about.100 weight % of pellets consisting of carbonaceous material containing substantially more than 70 weight % of carbon and a bonding agent comprising pulverized phenol resin, liquid thermosetting resin and/or setting accelerator, bricks formed therefrom containing more than 40 weight % of carbon.