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我厂两座100m~3高炉,先后在七一年十二月十八日和七二年九月二十四日开炉,两座高炉均系北京钢铁设计院58设计版,属瘦长型。开炉初期炉况基本顺行,一月左右以后由于我厂焦炭强度差、矿石粉未多以及其他原因,炉况逐步恶化,炉缸堆积,悬料塌料频繁,特别是5~#高炉,每天几乎靠坐料下料,有时还出现顽固悬料,料坐不下,操作相当困难,采用各种装料制度,更改风口直径,均无剂于事。当炉缸堆积采用萤石洗炉,也只能暂时好几天。七三年我们试喷煤粉,在喷吹期间炉况有所好转,但一旦停吹,炉况又转
Two 100m ~ 3 blast furnaces of our factory were opened in succession on December 18 and July 24, 1972 respectively. Both of the blast furnaces were designed by Beijing Iron and Steel Institute of Design 58 and are of the elongated type. Initial furnace temperature basically goes well, after January or so due to poor coke strength of mine, ore powder is not much and other reasons, the gradual deterioration of furnace conditions, accumulation of hearth, hanging material collapse frequent, especially 5 ~ # blast furnace, Almost rely on the material sitting down the next day, sometimes stubborn hanging material, material sitting, the operation is quite difficult, the use of a variety of loading system, change the tuyere diameter, are of no help. When the hearth stacked fluorite furnace, it can only be a few days. In seven or three years we tried pulverized coal, and the furnace condition got better during the blowing, but once the blowing stopped, the furnace turned again