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The tunnel kiln flat ceiling comprises a straight kiln flat ceiling and a parallel kiln flat ceiling, wherein the ceramic fiber flat ceiling is used for heat preservation construction on the tunnel kiln roof to prepare a light tunnel kiln refractory fiber lining.

Mobile tunnel kiln, also known as ring tunnel kiln, referred to as ring kiln; The heat preservation of tunnel kiln is divided into preheating zone, sintering zone and cooling zone along the length direction of kiln.

Tunnel kiln is a modern industrial kiln which is widely used in building materials, ceramics and refractory industry, and is a kind of thermal equipment for continuous production. According to the firing temperature can be divided into low temperature tunnel kiln ( 1000 ~ 1350 ℃ ), medium temperature tunnel kiln ( 1350 ~ 1550 ℃ ), high temperature tunnel kiln ( 1550 ~ 1750 ℃ ) and ultra-high temperature tunnel kiln ( 1750 ~ 1950 ℃ ).