竖炉焙烧带中心设置导风墙,实现冷却风“炉内短路”,使冷却风的大部份不穿越焙烧带球层而经由导风墙内孔直接导入干燥带。这样既减小高温料柱阻力损失又克服了冷却风对焙烧带的“干扰”,从而使冷却风量增大。增大冷却风用量一方面提高冷却 Wind furnace roasting center with wind guide wall set to achieve the cooling wind “furnace short circuit” so that most of the cooling air does not cross the layer of roasting with the wind through the hole wall directly into the drying zone. This will not only reduce the high temperature column resistance loss but also overcome the cooling air on the roasting zone “interference”, so that the cooling air volume increases. Increase the amount of cooling air on the one hand to improve cooling