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我国50年代至70年代建设的高炉,炉顶装料设备主要是由受料漏斗、马基式布料器、大钟装料设备以及推动大小钟开闭的平衡杆等部分组成,而且当时普遍使用热烧结矿。这种由大小钟组成的单密封室装料设备,炉顶操作压力一般只能维持在0.05～0.07MPa;即使在用冷烧结矿的高炉上,炉顶操作压力也只达到0.1～0.12MPa,而且不能保持长期稳定地操作。虽然作过一些局部改进,例如:为提高装料设备的密封性
In the 1950s and 1970s, the blast furnace and top loading equipment in our country mainly consisted of material receiving hopper, Markov distributor, clock charging equipment, balance bar for opening and closing the bell, and was widely used at that time Hot sinter. This kind of single-sealed-chamber loading equipment composed of bell and bell, the operating pressure of the roof can only be maintained at 0.05 ~ 0.07MPa. Even in the blast furnace with cold sinter, the operating pressure of the roof only reaches 0.1 ~ 0.12MPa, And can not maintain long-term and stable operation. Although some local improvements have been made, for example, to improve the tightness of the charging equipment