Plate Glass Furnace Refractories

1. tank bottom refractories

tank bottom adopts fireclay blocks, zircon or AZS ramming mix is paved above fireclay blocks. Melting part tank bottom surface is paved by 33# oxidization fused shrinkholes free AZS bricks. When requirement is not strict, tank bottom before hot point can be paved by sintered AZS bricks. Cooling part tank bottom surface should be paved by α-β-Al2O3 fused cast bricks, if requirement is not high, 33# no shrinkholes fused AZS bricks can be selected.

2. Tank wall bricks and side wall bricks

Melting part tank wall should be lined by 33# fused AZS bricks, 36# fused AZS bricks and 41# fused AZS bricks. Or other bricks produced by dense casting method or tilt casting method can be adopted according to corrosion conditions. But corner bricks should adopt 41# shrinkholes free AZS bricks. Tank wall bricks liquid line part should be air cooled or water cooled, other parts can adopt non asbestos calcium silicate plate for heat preservation. Cooling part tank wall bricks are α-β-Al2O3 fused cast bricks, if requirement is not high, 33# tilt pouring casted AZS bricks can be adopted.

Melting part side wall can adopt 33# shrinkage free AZS bricks, while clarification part and cooling part breast walls are lined be high quality silica bricks, or β-Al2O3 bricks can be adopted when requirement is high.

3. L shape suspended wall and back gable bricks

33# fused AZS bricks-sintered zirconia mullite composite bricks are used at L shape suspended wall nose part. AZS part has T shape hook, zirconia mullite part has       shape groove, they are mechanically connected. When requirement is not high, zircon mullite bricks with good sintering, proper porosity, nice high temperature volume stability and so on can be selected. The part above composite bricks should adopt high quality zircon mullite bricks, the top layers can use high quality silica bricks. Glass kiln back gables and traditional front wall can be built by premium silica bricks.

4. Main arch refractories

Melting part main arch is lined by premium silica bricks which contain 96% SiO2, melting index is less than 0.5%, true density is no bigger than 2.34 or 2.35 and dimensional tolerance should be small. Silica bricks are sealed by unshaped refractories and then insulating layer is paved.

5. Regenerator refractories

Regenerator top part suffers Na2O and floating material combined action. Regenerator middle and lower part mainly suffers sodium sulfate-rich material corrosion, and regenerator lower part refractories mainly suffers thermal shock action.

When there is no special requirement, checkerwork with 1300~1100℃ working temperature can be lined by 98%~97% and 96%~95% magnesia bricks. At 1100~800℃, direct bonded magnesia chrome bricks can be adopted. Below 800℃,  low porosity fireclay bricks can be adopted. Cr2O3 in magnesia chrome refractories has good resistance to sodium sulfate corrosion, but to avoid Cr⁶⁺ pollution, magnesia zirconia bricks or spinel bricks can be used to replace magnesia chrome bricks.

6. Tin bath refractories

Tin bath bricks are composed of refractory blocks, grouting material, graphite products and stainless steel fixed parts.

Tin bath top cover bricks usually adopt sillimanite bricks and insulating bricks and combined refractory castable precast blocks. Tin top precast blocks should better high temperature treated to totally remove bound water and obtain stable structure and performance.