Refractory compositions with binder

Claim 2

A refractory composition comprising about 60 to 98 weight percent of discrete, size graded aggregate particles of high alumina, carbon and clay, and as binder a resol phenol formaldehyde resin in liquid form prior to heating and having a viscosity at 25° C. of up to about 3000 cps.

Claim 3

The composition of claim 1 wherein said resin has a viscosity of about 200 to 400 cps.

Claim 4

The composition of claim 2 including about 1 to 30 weight percent of silicon carbide particles.

Claim 5

The composition of claim 3 including about 75 to 95 weight percent of said high alumina particles, about 2 to 15 weight percent carbon in the form of graphite, about 0.5 to 15 weight percent of said resin and about 1 to 25 weight percent clay.

Claim 6

The composition of claim 4 including about 15 to 25 weight percent of said silicon carbide particles, about 1 to 10 weight percent of said resin and about 2 to 10 weight percent of a ball clay.

Claim 7

The composition of claim 5 including water.

Claim 8

The composition of claim 1 including about 1 to 30 weight percent of silicon carbide particles.

Claim 9

A refractory composition for use as a rammable blast furnace through refractory, comprising about 75 to 95 weight percent of discrete, size graded aggregate particles of high alumina, about 2 to 15 weight percent graphite, about 2 to 10 weight percent of a ball clay, about 15 to 25 weight percent of silicon carbide particles, and about 1 to 10 weight percent of a resol phenol formaldehyde resin in liquid form prior to heating and having a viscosity at 25° C. of 200 to 400 cps.

Claim 10

A refractory composition for use as a rammable blast furnace through refractory, comprising about 75 to 95 weight percent of discrete, size graded aggregate particles of high alumina, about 2 to 15 weight percent graphite, about 2 to 10 weight percent of a ball clay, about 15 to 25 weight percent of silicon carbide particles, and about 1 to 10 weight percent of a resol phenol formaldehyde resin in liquid form prior to heating and having a viscosity at 25° C. of 200 to 400 cps.