目前国内广泛使用的旧式进风弯管存在着绝热不良、漏风严重等问题。据重钢620米~3和梅山1060米~3高炉实测资料,由于漏风和散热,造成从热风围管到风口一段风温损失达60～80℃。信阳钢铁厂100米~3高炉该段风温损失高达146℃。另外,旧式进风弯管缺少监测各风口进风量的装置,不利于对炉况的控制。因此,为了充分利用来之不易的高 At present, the widespread use of the old inlet bend there is poor insulation, serious air leaks and other issues. According to the measured data of 620 m ~ 3 heavy steel and 1060 m ~ 3 blast furnace at Meishan, due to air leakage and heat dissipation, the temperature loss from the hot air pipe to the tuyere reaches 60-80 ° C. Xinyang Iron and Steel Plant 100 m ~ 3 blast furnace temperature losses of up to 146 ℃. In addition, the old inlet pipe lack of monitoring the amount of air inlet device, is not conducive to the furnace control. Therefore, in order to make full use of hard-won high