CARBON-CONTAINING REFRACTORY FOR IRON MELTING

摘要

PURPOSE:To control the oxidation of carbon and improve the corrosion resistance of a refractory by adding a vitreous material containing Li2O and F to a compounded refractory material containing a specific amount of a carbonaceous material. CONSTITUTION:The objective carbon-containing refractory for iron melting can be produced by adding 0.1-10wt.% of a vitreous material containing Li2O and F and a proper amount of a binder to 100wt.% of a composition containing 3-30wt.% of a carbonaceous material such as graphite and the remaining part of a refractory material. Since the added vitreous material has low softening point and gives a softened liquid phase having low viscosity, the material is liable to move between aggregate particles. Furthermore, since the vitreous material has improved wettability to the refractory material by the effect of Li2O and F, it can be easily crosslinked at the circumference of the carbon material to cover the carbon material and improve the oxidation preventing effect.