Insulation for Different Parts of Glass Furnaces

The insulation for all parts of the glass furnaces should comply with the following principles.

1. Maximize the insulation range. 

2. The interface temperature of the insulation brick should not exceed the temperature the material can withstand. 

3. The crown, breast wall, part wall and the crown of regenerators are insulated after pre-heated. 

4. Expansion joints do not require insulation.  

 

The insulation structures for different parts of glass furnaces are as followings:

1. Crown

1) 300mm silica brick + 35mm quartz sand + 65mm silica insulation brick + 20mm asbestos mud.

2) 300mm silica brick + 50mm quartz sand + 65mm silica insulation brick + 65mm fire clay insulation brick + 20mm asbestos mud.

3) 300mm silica brick + 40mm quartz sand + 115mm silica insulation brick + 65mm silica insulation brick + 20mm asbestos mud.

4) 300mm silica brick + 30mm silica sealing materials + 115mm silica insulation brick + 50mm silica brick lightweight insulation material.

 

2. Breast wall

1) 350mm silica brick + 65mm silica insulation brick + 50mm calcium silicate board.

2) 300mm silica brick + 6mm silica sealing materials + 65mm silica insulation brick + 115mm high alumina insulation brick + 50mm calcium silicate board.

 

3. Sidewall

Fused cast AZS block + 35mm AZS ramming mass + 115mm fire clay insulation brick + 50mm calcium silicate board & steel board. 

 

4. Tank bottom

1) 70mm fused cast AZS block + 35mm AZS ramming mass + 300mm large poured brick + 280mm fire clay insulation brick + 10mm asbestos board. 

2) 70mm fused cast AZS block + 35mm AZS ramming mass + 40mm zircon brick + 35mm AZS ramming mass& large poured brick + 280mm fire clay insulation brick + 10mm asbestos board + 8mm steel board. 

 

4. Port and regenerator

1) Port crown: 250mm silica brick + 30mm quartz sand + 115mm silica insulation brick + 20mm asbestos mud. 

2) Port wall: 350mm silica brick + 6mm silica sealing materials. + 65mm silica insulation brick + 50mm calcium silicate board.

3) Regenerator crown: 250mm silica brick + 30mm quartz sand + 115mm silica insulation brick + 20mm asbestos mud. 

4) Regenerator wall: 230mm fire clay brick + 115mm fire clay insulation brick + 240mm building brick; fire clay brick + 230mm fire clay insulation brick + 20mm insulation coating.