abstract |
Invention Patent: <B> "COMPOSITION OF RACING HOLE FOR A METAL FUSION EQUIPMENT" <D>. a racing hole closure composition for metal melting equipment is described, the composition comprising (a) a refractory aggregate having a maximum particle size of 5 mm u minus, (b) graphite and silicon nitride each having a maximum particle size of 0.2 mm or less, (c) a refractory clay, (d) a compatible binder mixture comprising a phenolic resin, a ketone compound and a tar, and (e) a fine organic fiber. |