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湖南省宁乡县八一钢铁厂在推行管式热风炉的多嘴、低位、分段燃烧的先进经验以后,又多方设法改进热风炉,获得了良好的效果。经测定,风温经常维持在770～850℃之间,最高达到过875℃。从炉内废气温度及废气成份测定的结果得知:炉内废气温度相当均匀,沿纵剖面各测点,距离炉底1300毫米以上至拱顶下沿一带,废气温度波动在930—970℃之间;在1300毫米以下的各点,因受到燃烧嘴附近的空气孔进入的冷气流的影响,废气温度也有低于900℃的。废气烟道中的废气温度最高840℃,有时也低于700℃。从热风炉前后左右10个孔中取出的废气试样的分析结果看,除一个试样含有5％的一氧化碳和没有自由
August 31, Ningxiang County, Hunan Iron and Steel Plant in the implementation of pipe-type stove stovepipe, low, the advanced experience after the split, but also many ways to improve the stove, and achieved good results. The measured temperature is often maintained at between 770 ~ 850 ℃, the highest reached 875 ℃. From the furnace exhaust gas temperature and exhaust gas composition of the results showed that: the furnace exhaust gas temperature is fairly uniform, along the longitudinal section of the measuring point, from the bottom of the furnace 1300 mm above to the vault along the area, the exhaust gas temperature fluctuations in the 930-970 ℃ ; At 1300mm below the point, due to the air hole near the burner into the cold air flow, the exhaust temperature is also lower than 900 ℃. Exhaust gas flue gas temperature up to 840 ℃, and sometimes lower than 700 ℃. Analysis of exhaust gas samples taken from 10 holes in the front, back, left, right and left of the stove shows that except for one sample containing 5% carbon monoxide and no free