PROCEDURE FOR PRODUCING THE REFRACTORY COATING OF SPOONS AND SIMILAR CONTAINERS FOR LIQUID STEEL

摘要

A granular, plastic, carbon-containing refractory composition keeping workable for at least two months after the date of supply, for the lining of vessels for liquid steel such as casting ladles and transport ladles, by way of ramming, slingering or vibrating, comprises a granulated refractory material such as sintered and/or fused magnesia, spinel, magnesium silicate, zircon, corundum, alumina or andalusite, 1 to 20 percent by weight of a solid carbon carrier in the form of graphite, carbon black, ground coke powder, crushed carbon electrodes or the like or mixtures thereof, and 2 to 7 percent by weight of a stable thermosetting synthetic resin free of hardener, preferably a phenolic resin of the type Novolak or a modified phenolic resin, which is either present in the solid state as a finely ground powder, possibly with 2 to 7 percent by weight of a plasticizer, or dissolved in a non-aqueous solvent. If required, the composition can also contain an antioxidant in the form or 1 to 7 percent by weight of a metal powder and/or finely ground carbide.