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As to the melting part of bottle furnace, the required refractory bricks shall be strictly selected.

1. Arch of furnace (crown): work temperature is 1500～1600℃, contact with high temperature alkali vapor directly, The selection of refractory bricks should use high quality silica bricks.

2. Contact area of the flow in the vault: containing arch brick, breast wall brick, back wall brick, tuck stone brick and nozzle brick whose working temperature is 1500～1600℃, and fused cast AZS block is mainly used.

3. The position contacted with glass liquid: mainly using straight brick, corner brick in dog house, bubbling brick, electrode brick and cover brick of dog-hole, the working environment is 1200～1550℃, these parts mainly adopt fused cast AZS block or sintered mullite bricks.

4. Sealing layer of tank bottom: working temperature is 1200～1400℃, mainly use zircon ramming material and zircon brick.

5. Side wall brick: this part directly contacts with glass liquid, which can adopt fused cast azs block.

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