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70年代末和80年代,日本和西欧都致力于高炉的长寿化,当时所建高炉寿命普遍达到10年左右,有的近15年。80年代末和90年代初,这些国家所建高炉设计的寿命都为15年以上。在80年代,我国开发和应用了一些高炉长寿技术,有一些高炉的寿命已经达到或有望达到8～10年。今后我们要使大多数高炉的寿命达到8年以上,同时也要着手设计和建设寿命为15年的高炉。要使高炉寿命达到8年以上,炉缸和炉身下部(包括炉腰、炉腹)仍是要给予充分重视的两个薄弱部位。
In the late 1970s and 1980s, both Japan and Western Europe devoted themselves to the longevity of blast furnaces. At that time, the life of blast furnaces built generally reached about 10 years, some of them nearly 15 years. In the late 1980s and early 1990s, the life of blast furnaces built in these countries was more than 15 years. In the 1980s, some blast furnace longevity technologies were developed and applied in our country, and some blast furnaces have reached or are expected to reach 8 to 10 years. In the future, we will make the life of most blast furnaces reach more than eight years. At the same time, we must also start to design and construct a blast furnace with a life of 15 years. To make the blast furnace life of more than 8 years, the hearth and the lower part of the shaft (including the waist, bosh) is still to give full attention to the two weak parts.