基准期3～15min平均温度93.07℃，废气循环烧结废气温度平均为93.48℃，相差不明显。基准期废气温度开始上升（上升点）时间为18min，而废气循环烧结废气温度开始上升时间分别为18min、17min、17min、16min和15min，平均为16.6min。说明采用废气循环烧结后，烧结上升点明显提前，比基准期提前1.4min。废气循环烧结时温度上升点提前，应认为降低了过湿带的存在时间。

The average temperature of 3-15min base period was 93.07℃, and the average temperature of sintering waste gas was 93.48℃, with no obvious difference. The rise time of exhaust gas temperature in the base period is 18min, while the rise time of exhaust gas sintering exhaust gas temperature in the exhaust gas cycle is 18min, 17min, 17min, 16min and 15min, with an average of 16.6min. It indicates that the rising point of sintering is significantly advanced after using waste gas circulation sintering, which is 1.4min earlier than the reference period. The temperature rise point of waste gas circulation sintering is advanced, which should be considered to reduce the existence time of the over-wet zone.