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Two glass kiln regenerator refractory selection options for reference!
Jan 02, 2019

In the selection of refractory materials for glass kiln regenerators, there are mainly lattice bodies, grate bars, regenerator roof tops, side walls and middle partition walls. The temperature of the regenerator brick body changes with time, the temperature fluctuation is large, and the gas is complicated. It is mainly subjected to losses from three aspects: thermal shock, chemical attack and mechanical stress. Thermal shock easily causes the brick to melt, soften and generate thermal stress, which causes the brick to crack, mainly in the upper part of the lattice brick. Chemical corrosion is the contact between the above-mentioned solid powder particles and gas and the contact reaction between lattice bricks of different properties, which will cause the brick body to melt into a liquid phase, crystal transformation, structural cracking, spalling, etc., mainly occurring in the regenerator Middle and upper. The mechanical stress is the mass load. The total mass of the lattice brick of a regenerator is about 100t. Therefore, the load of the bottom lattice brick is large, and it has to undergo the alternating hot and cold action of the commutation operation. Therefore, it is required to select dense and thermal shock performance. And can bear the weight of refractory materials.

(1) Alkaline brick scheme

The top layer check brick of the regenerator of the scheme is a high-purity magnesia brick directly combined with the upper layer, the ordinary layer is made of ordinary magnesia brick, the middle layer is made of magnesia-chrome brick or forsterite brick which is resistant to sulfate attack, and the lower layer is made of low porosity porosity clay brick, magnesia brick. The transition material between the clay brick and the clay brick is made of anti-stripping high alumina brick.

(2) Electrofused zircon brick scheme

The same cross-shaped fused zirconia corundum lattice brick (ER-1681) is used for the entire lattice of the regenerator. It has been reported that fused beta-alumina has recently been used as the top lattice brick.

The top of the regenerator is often made of electrofusion AZS bricks, directly combined with magnesia bricks or silica bricks. The upper layer of the side wall and the partition wall is made of magnesia brick, the middle layer is made of magnesia brick or low porosity porosity clay brick, and the lower layer is made of low porosity porosity clay brick. The grate bars are made of low porosity clay bricks.

After selecting the solution suitable for the kiln regenerator, the quality of the refractory material, the construction quality of the refractory bricks, and the later oven, curing, and daily operations are all key factors that affect the safe operation of the kiln. Therefore, in these steps must be completed in accordance with the design requirements. Avoid economic losses caused by kiln problems.

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