Last issue we mainly introduced refractory hanging plate V-stitch packing and lightweight aggregate refractory mud seal. This issue we will introduce the laying of the roof insulation layer of the tunnel kiln and the sealing surface of the kiln roof.
4.Laying of insulation layer.
The bottom layer of the thermal insulation layer on the top of the kiln shall be a high-purity aluminum silicate fiber needle-punched blanket. The surface layer may be a needle punched common aluminum silicate fiber blanket or felt. When laying the blanket, it is necessary to divide the laminating seam. When the two blanket is connected, the seaming method is adopted. If the top layer is aluminum silicate fiber blanket, the blankets are glued with glue of temperature resistance 800 C . When laying the bottom layer, it should be noted that the circumference of the heat-resistant hanging piece must be compacted, and the joints should be staggered. The laying of blanket should be staggered, each layer should be compacted, the surface should be flat.
5.Kiln top surface seal.
After the kiln roof insulation layer is laid, it is sealed with 1000 °C resistant paint to completely seal the kiln roof. This seal layer is better if it is done after preheating of the kiln.
This issue we mainly introduced laying of the roof insulation layer of the tunnel kiln and the sealing surface of the kiln roof. Hope this can bring help to furnace builders. Next issue we will introduce insulation of tunnel kiln waste heat pipe. Please stay tuned.