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至1980年止,我国炉容在255米~3以上的高炉有90余座。这些高炉基本是五十年代的装备水平,个别的还保持着四十年代的装备水平。炉顶大部分采用双钟马基式装料设备,顶压一般是常压,高压也局限在1.2公斤力/厘米~2左右。采用斜桥料车卷扬机上料。炉前机械化水平不高,几乎都采用打泥压力不高的电炮、钻杆式开铁口机,人工换风口。在鼓风方面,基本采用内燃式热风炉,风温不高,热风阀寿命不长,法兰不严,漏风率高。烧结矿热振筛及冷却盘不过关,热矿入炉,原燃料没有进行整粒。利用
Until 1980, China’s furnace capacity of 255 meters to 3 more than 90 blast furnace. These blast furnace basically is the level of equipment in the fifties, some still maintain the equipment level of the forties. The top of the stove adopts the double-beak-horse-based charging equipment, the top pressure is generally atmospheric pressure, and the high pressure is also limited to about 1.2 kg / cm ~ 2. The use of inclined bridge material car hoist feeding. The furnace mechanization level is not high, almost all used to play the mud pressure is not high electric gun, drill pipe type iron machine, artificial vents. In the blast area, the basic use of internal combustion hot stove, the air temperature is not high, hot air valve life is not long, the flange is not strict, high air leakage rate. Sinter heat recovery sieve and cooling plate, but off, hot ore into the furnace, the original fuel is not for the whole grain. use