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卢森堡P—W公司于七十年代初发明了无料钟炉顶以来,它以具有结构简单、布料灵活密封性好,维修方便和投资省等优点很快遍及全世界。到目前为止,全世界已向卢森堡P—W公司购买了105套无料钟炉顶设备,到1985年底,已有85套投入运行。我国(除台湾省外)自行设计并已经投产的也有7座(首钢2号、3号、4号高炉,酒钢1号高炉,包钢1号高炉,梅山1号高炉及昆钢2号高炉)。从发展看,钟式炉顶设备有将被无料钟炉顶所取代的趋势。
Since the invention of the bellless roof in Luxembourg in the early 1970s, P-W Luxembourg has quickly gained worldwide popularity thanks to its simple construction, flexible fabric sealing, easy maintenance and investment. So far, the world has purchased 105 sets of bell-less top equipment from P-W Luxembourg and by the end of 1985 85 have been put into operation. There are also 7 self-designed and put into operation in China (Shougang No. 2, No. 3 and No. 4 blast furnaces, Jiuquan Iron and Steel No. 1 blast furnace, Baotou No. 1 blast furnace, Meishan No. 1 blast furnace and Kunming Iron No. 2 blast furnace ). From the perspective of development, the bell-type roofing equipment will be replaced by the bell-less top.