zone length
2.Abstract: In this paper,according to thc measuring results of thermal balance.The influence of ratio of sagger and ceramic weight,the kiln car and ceramic,the leakage air volume in length in heating zone,the productivity of unit volume,outside sruface temperature of kiln crown,outslde surface temperature of kiln wall,firing temperature difference of firing zone,length on firing zone,utlization factor on heat consumption was analyzed.
5.Based on the theory of the gas diffusing and the toxic injury model, the area of accident harm was divided into the death zone, the severe harm zone, the slight harm zone and sucking reaction zone. The model of equivalent length, the feasibility of the evacuation route and the concepts of the coefficient of pass difficulty, ease and danger were put forward.
6.In this paper, it was mainly studied the influences of main parameters on flow field in the screw die, including the distance between the damp zone and the screw, the calibration length, the lead of the screw, the width of the screw flight, the boot diameter of the screw, the structure of the screw end, the section area of the side pass, the clearance of the damp zone, etc.

