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If you expect the glass furnace to reach the designed service life, you need to know both the appearance quality and inner quality completely of refractory bricks such as fused cast azs block, not only the good properties, but also the weakness, for instance, which parts can have flaws, which parts must be perfect.

Appearance quality
Fused cast azs block 44# is generally used in sidewall of glass furnace such as corner bricks, bubbling brick, dog hole brick, and dam block, which have strictly requirement to gap with adjacent brick, as big gap can speed up the erosion of glass liquid to fused cast azs block, so 0.5mm is the maximum gap when assembly; shrinkage holes of bottom bricks are not allowed to exist; per cubic meter of surface，more than 2mm porosity is not allowed more than twelve; color of fused cast azs block should be white-yellow; bubbling brick and dog hole brick are not allowed to exist crack; There is no defect in the top of the wall of 300mm. All above requirement is quite important which will directly influence the service life of glass furnace.

Inner quality
1. According to the color of fused cast azs block, impurity in fused cast azs block can be judged, if there is large amount of carbon in block, the body color is blue, which is strictly put an end to use, because this block will reduce the service life of glass furnace doubly.

2. If there is massive blue phenomenon on the surface of fused cast azs block, iron is quite possible in the inner of block and iron is maybe produced from production process of fuse cast azs block. This refractory block is also strictly put an end to use.

3. Glass phase ratio must be strictly controlled, as excessive glass phase will reduce the service life of glass furnace and pollute the glass liquid.

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If you are interested in our products or have any question, please don't hesitate to contact us for further information. Zhengzhou Sunrise Refractory Co., Ltd can provide excellent fused cast azs block. All the products of Zhengzhou Sunrise Refractory Co., Ltd have passed the ISO international certified. High purity raw material, scientific formula, advanced technology and professional guide, all of them contribute to our qualified production. Sunrise is sincerely looking forward to establishing a long-term mutually beneficial relationship with you.

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