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This is the first zircon refractory aggregate, AZS refractory powder and silica sol - alumina composite cements prepared a AZS combined zircon glass furnace ramming mixes. Ramming mixes with the pure zircon, the zircon doped fused zirconia corundum ramming mixes with low sintering temperature, compact structure, strong corrosion resistance. Sol - for the first time the alumina composite cementing agent instead of the traditional phosphate cements prepared by the glass furnace ramming mixes. Its advantages are: at room temperature hardening, sintering shrinkage is small, anti-erosion ability. By SEM, EDAX, XRD, DTA and optical microscopy observation of the sample phase composition and physical and chemical changes, test the sample porosity, compressive strength, density and depth of erosion material physical and mechanical properties systematic study of fused zirconia corundum and silica sol - alumina composite cements ramming material resistance to molten glass corrosion properties of its physical and mechanical properties of materials, and improve the corrosion resistance of zirconium ramming mix The mechanism was discussed. Studies have shown that affect zirconium ramming material of the main factors for anti-erosion of molten glass is its chemical composition, phase composition, microstructure and soda-lime-silica glass solution alkalinity. Containing 30% AZS sintered at 1300 ℃ ramming material sample, compressive strength 155Mpa, porosity of 9.0%, the erosion rate is down to one-tenth of the only zircon ramming mixes, sintering reduce the 100 ° C temperature, the grain closely integrated with the matrix and reduce porosity and microstructure characterized in that it has better overall performance, and at the same time, it is also more than zircon ramming material have better resistance to alkaline liquid glass corrosion. Phosphate, low calcium aluminate cement and silica sol binder ramming mixes performance. The results showed that: phosphoric acid (salt) generated under the high temperature of the binder phase intolerant of soda-lime-silica glass liquid erosion, with a large volume shrinkage, can not be hardened at room temperature, at room temperature under a drawback in that the intensity is low; Silica - Alumina composite cements of sample evenly distributed, dense structure formed by high-temperature sintering mullite-based ceramic bond, also reduces the ramming mixes high-temperature sintering shrinkage, thus significantly improve the ability of anti-soda-lime-silica glass liquid aggressive; another one hand, it is at room temperature hardening, has a higher compressive strength at room temperature (9.7Mpa), the construction performance is also improved. Zircon problem of high sintering temperature, ADD admixtures such as alumina, magnesium oxide, boric oxide, cerium products porosity, compressive strength, resistance to corrosion. The results showed: Add Al 2 O 3 after the formation of mullite can reduce the ramming mixes high temperature volume shrinkage, and other additives did not cause the generation of a new phase, substantially all partially into the glass phase, is conducive to the ramming material sintered, suitable addition amount (the Al 2 the O 3 5 to 10% MgO <2%) to improve the products The a useful resist excessive amount would deteriorate its performance.
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