Al2O3-SiC-C 砖研究 brik research
With the application of hot metal desulphurization pretreatment technology, the Al2O3-SiC-C brick not only has high temperature corrosion, but also has structural spalling caused by slag penetration, which makes the service life of Al2O3-SiC-C brick low. As a result, Al2O3-SiC-C brick should not only have excellent resistance to slag, molten iron erosion and permeability, but also have excellent resistance to melting loss, erosion and thermal shock.
Adding magnesium oxide to Al2O3-SiC-C material can improve the slag erosion resistance, but it should be added according to the environment. Scholars at home and abroad have found that adding proper amount of magnesium oxide, leaf wax and and andalusite into Al2O3-SiC-C brick can improve the slag erosion resistance and thermal shock resistance of Al2O3-SiC-C brick.
Effects of adding amount of fused magnesia powder, andalusite powder or pyrophyllite powder on flexural strength, thermal shock resistance and slag erosion resistance of Al2O3-SiC-C brick were studied.
220℃ The volume density, apparent porosity and compressive strength of the sample after drying vary with the addition of additives.
For different additives, the bulk density decreases first and then increases with the increase of the addition amount, and then decreases, so the porosity is not obvious. With the increase of additive addition, the flexural strength of the sample increases first and then decreases. The addition of a small amount of fused magnesium sand powder, andalusite powder and pyrophyllite powder to the Al2O3-SiC-C sample can improve its high temperature flexural strength and thermal shock resistance. The addition of fused magnesium sand powder to the Al2O3-SiC-C sample can reduce the erosion of homogenized bauxite and obviously improve the slag erosion resistance of the sample.