Carbonaceous refractory and method of production of same and also blast furnace bottom or side walls

摘要

A carbonaceous refractory and a method of production is provided, which prevents a drop in the molten pig iron corrosion resistance, molten pig iron penetration resistance, and other properties of carbonaceous refractories required for blast furnace bottom refractories. The mechanical strength of the refractories is raised so as to suppress cracking due to thermal stress. The carbonaceous refractory comprises a carbonaceous material comprising one or more of calcined anthracite, calcined coke, natural graphite, or artificial graphite in 60 to 85 mass %, a refractory metal oxide in 5 to 15 mass %, metal silicon in 4 to 15 mass %, and carbon black in 2 to 10 mass %. An organic binder is added to refractory materials, which are kneaded, molded and fired in a nonoxidizing atmosphere.

主权项

1. A carbonaceous refractory, comprising:
an organic binder added to refractory materials, the refractory materials comprising: a carbonaceous material comprising one or more of calcined anthracite, calcined coke, natural graphite, and artificial graphite in an amount of 60 to 85 mass %, a refractory metal oxide in an amount of 5 to 15 mass %, metal silicon having a particle size of 1 to 74 μm in an amount of 4 to 15 mass %, and carbon black having an average particle size of 30 to 300 nm in an amount of 4 to 6 mass %, wherein the binder and refractory materials are kneaded, shaped, and then fired in a nonoxidizing atmosphere.