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Insulation Layer Laying for Kiln
Source:   Author:  Release time:2016/3/7 11:09:04  Clicks:845

Refractory material between external walls and interior walls should be uniform, close density and kept from water. Normally, the refractory material is common needled blankets of aluminum silicate fiber. When installation, blanket should bepressed tightly and compress the gap. The joint between two pieces of blanket should be connected and tightly sealed by heat-resisted binders. The blanket should well-cut by cutters, and do not tear this blanket by hands. Heat-insulting work for the kiln roof ( for flat roof kiln) as follows:

1. Pre-laying the high-alumina silicate fiber blanket at the joint space between interiorwall and refractory ceiling board, and the thickness of the blankets is about1/3 of the distance between kiln wall and ceiling board, which prevent  the refractory ceiling board to be arched and deformed caused by the kiln wall thermal expansion. 

2. Fill with the high-alumina silicate fiber blanket in the ‘V’ gaps of the ceiling board. the thickness of the blankets will depend on the minimum dimension of the ‘V’ gap and the degree of the thickness should reach to that the blankets can hardly be compressed. At the joint between two pieces of blanket, the length should be 5cm longer. The blanket between each two ceiling board, strip separate the middlelayer of blanket and lap on the ceiling board. 


3. Make the 20mm thickness sealing coat layer with refractory mud, then start to laythe heat-insulation layer of kiln roof.

4. Laying work of heat-insulting material on the kiln top surface:  in which,  the bottom part of kiln should lay the heat -resistant high-alumina silicate fiber blanket, and top part could lay the common level alumina silicate fiber blanket/felt. The connection between blankets should use the compression connection method. After finishing the insulation layer, it should use the high temperature resistant coating with anti 1000 temperature as surface sealing layer. This sealing layer should be done after drying the kiln.

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