Magnesia Zirconia Chimney Blocks

Most domestic glass kiln regenerators use three-layer magnesia-zirconia checker blocks for the upper part. The blocks are fired in ultra-high temperature tunnel kilns. They are a new type of high-quality magnesia refractory material combined with periclase-forsterite-zircon. . Magnesia-zirconia blocks have produced a large amount of stable forsterite and zirconia before use, and are tightly surrounded by periclase. Due to the strong corrosion resistance of forsterite and zirconia, the corrosion resistance of the block is improved. The maximum temperature of the upper part of the regenerator is about 1300℃, and the magnesia-zirconia block can fully resist the impact of high temperature at this temperature. With the exchange of air flow in the regenerator, a large amount of silicon, sodium, calcium in the molten pool glass fly material and a large amount of sulfur and a small amount of phosphorus in the gas adhere to the surface of the block, gradually invade the inside of the block, and form sodium, calcium, and magnesium. The sulphate, phosphate and silicate and their composite salts dismember the bonding strength of the blocks at the same time, resulting in a decrease in the strength of the blocks.