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日本、西德等国在高炉长寿方面采取了多种措施,包括对高炉冷却壁所作的各种改进,如材质改用高韧性球墨铸铁、水管防渗碳处理以及对壁体结构加以改进,目前寿命已经达到10年。近年来,我国也研制出高炉冷却壁用的高韧性球墨铸铁,其他方面的改进也正在进行,高炉寿命可望达到10年。本文就进一步提高高炉寿命的问题,从经济效益、冷却壁材质、冷却壁结构以及稳定的生产炉型等四方面进行讨论。一、延长高炉寿命的经济效益日本高炉开工率为75％左右,约有25％的高炉作为备用,因此一般来说大修并不影响生产;另一方面,尽管日本高炉寿命达到10年的已很普遍,但仍然很重视提高高炉寿
Japan, West Germany and other countries took various measures in respect of longevity of the blast furnace, including various improvements made to the cooling stave of the blast furnace, such as the use of highly ductile ductile iron as the material, carburizing treatment of water pipes and improvement of the wall structure, Life expectancy has reached 10 years. In recent years, China has also developed a highly ductile ductile iron for blast furnace cooling stave. Other improvements are under way and the life expectancy of the blast furnace is expected to reach 10 years. In this paper, to further improve the life of the blast furnace from four aspects: economic benefits, stave material, stave structure and stable production furnace and other aspects are discussed. First, the economic benefits of extending the life of the blast furnace Japan blast furnace operating rate of about 75%, about 25% of the blast furnace as a backup, so in general overhaul does not affect the production; the other hand, although the Japanese blast furnace life of 10 years has been very Common, but still attached great importance to improving blast furnace life