REFRACTORY MATERIAL HAVING MAGNESIA GRAPHITE

摘要

Magnesia-graphite refractories consist of 70-90 wt.% magnesium oxide and 10-30 wt.% graphite and magnesium-calcium alloy powder, which composition of this alloy is 1-10 wt.% against the weight of refractory bricks. And weight ratio between magnesium and calcium of alloy powder is 37:13-9:1 (Mg:Ca). The alloy powder is coated with 8-25 wt.% silicone oil against the weight of powder. The particle size of this alloy less than 0.074 mm (-200 mesh). The refractories have an excellent abrasion- and heat impact-resistance.