The paper aims at investigating whether corundum bricks can be used for the bottom of the direct reduction furnace of high phosphorus oolitic hematite. The reducing materials including high phosphorus oolitic hematite,bitumite,Ca(OH)_2 and Na_2CO_3 at a mass ratio of 1 0. 15 0. 15 0. 03 were mixed and pressed into carbon containing cylindrical specimens with the size of Φ 15 mm× 20 mm. The specimens were placed on the corundum bricks and reduced in a high temperature tube furnace at 1 200 ℃ for 40,60,80,140 and 220 min,respectively. The corrosion and penetration resistance of corundum bricks to high phosphorus oolitic hematite reducing materials were analyzed with XRD,SEM and EDS. It shows that the reducing slag formed in the reduction process corrodes the surface of corundum bricks to form a product layer of anorthite and hercynite,retarding the further corrosion of the reducing slag; the reducing slag which has penetrated into the interior of the brick goes through the gaps between the particles and generates anorthite and hercynite,filling the gaps and hindering the reducing slag penetration.
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