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小高炉结构特点容许强化,燃烧强度和风口间距离、H、H/D、煤气总的压头损失等有关。小高炉强化后的特点是:煤气速度大(为大高炉的1.5～2倍),矿料与煤气接触时间短(为大高炉的1/20),冶炼强度高且顺行,煤气利用不够理想。进一步强化,首先必须改善矿料的还原性,大力提高风温;其次在设备方面改进送风管路,多风口,椭贺风口。在风速较大的前提下,使燃烧带“展宽”,消灭中心料柱与边缘静滞区,缩小H/D之值。
Structural features of a small blast furnace allow to strengthen, the combustion intensity and the distance between the tuyere, H, H / D, total gas head pressure loss and so on. After the enhancement of the small blast furnace, it is characterized by large gas velocity (1.5 ~ 2 times for large blast furnace), short contact time between mineral material and gas (1/20 for large blast furnace), high metallurgical intensity and smooth gas utilization . To further strengthen, we must first improve the reducibility of mineral materials, vigorously improve the air temperature; followed in the equipment to improve the supply pipe, multi-tuyere, elliptical tuyere. In the wind speed under the premise of the combustion zone “widened” to eliminate the central material column and the edge of the dead zone, reducing the value of H / D.