In the designing of a small section high temperature tunnel kiln, a duble arch that was used for preheating first combustioresupporting air was additionally built in the fiting zone.

• 在小断面高温隧道窑改造设计中，通过在烧成带增设预热一次助燃风的二层突壁拱，烧咀排布采用多烧咀、小流量等措施，使窑炉烧成温度提高。