直接还原回转窑是高温强还原性冶金窑炉,结构上同常用的氧化煅烧窑或弱还原窑相比,具有显著不同的特点。例如窑两端需要较好地密封,以便能微正压（4～6mm水柱）下操作;为了建立较长而且稳定的高温带,沿窑长方向配置若干二次风管;为了严格控制高温带温度的变化,设置较多的测 Direct reduction rotary kiln is a high temperature and strong reduction metallurgical kiln, the structure with the commonly used oxidation kiln or weak reduction kiln compared with significantly different characteristics. For example, the two ends of the kiln need to be well sealed so as to be able to operate under a slightly positive pressure (4 to 6 mm water column); in order to establish a long and stable high temperature zone, several secondary air ducts are arranged along the kiln length direction; Temperature changes, set more measurements