Breathable material

In order to adapt to the development of the refining process outside the furnace, the influence of the mass fraction of MgO fine powder on the thermal shock stability of corundum-spinel permeable brick (brick core), the change of reburning line, the normal temperature flexural and compressive strength, the erosion index, The impact of penetration index. The performance test and analysis show that when the mass fraction of MgO increases, the magnesia-aluminum spinel phase formed by MgO and Al2O3 increases, which increases the flexural strength of the heat-treated air-permeable brick. In addition, the thermal shock stability of corundum-spinel is better than that of traditional chrome steel jade bricks, but there are still some shortcomings, and its volume stability is not as good as that of chrome steel jade bricks.

By adding corresponding additives to the air-permeable brick, the additive undergoes a phase change during the heat treatment process to form a high-temperature solid solution phase, which has the advantages of high high-temperature strength, difficult to be wetted by metal melt and slag, etc., making the air-permeable brick heat-resistant Vibration and slag resistance are improved.