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新日铁目前正在运行的高炉有9座,与20世纪70年代中期相比,高炉数量减少了一半,当时已开始建5000m3级超大型高炉。在此期间,为降低生产总成本,越来越强调提高高炉的生产灵活性、长寿化、机械化和缩短大修工期等,并开发、应用了一些新的设备技术,如利用高炉大修的机会扩大炉容、提高碳砖质量以延长炉缸寿命、采用铜冷却壁以延长炉身寿命、出铁场作业机械化和采用大件施工法缩短大修工期等,从而大幅度提高了高炉的功能和寿命,并最大限度地减小大修时产量的损失。本文对这些新技术及其主要内容进行介绍。
Nippon Steel currently has 9 blast furnaces in operation, reducing the number of blast furnaces by half compared to the mid-1970s when a 5000m3 super-large blast furnace was started. In the meantime, in order to reduce the total cost of production, more and more emphasis has been placed on improving blast furnace production flexibility, longevity, mechanization and shortening the overhaul period, and some new equipment technologies have been developed and applied such as blast furnace overhauls To improve the quality of carbon brick to extend the life of the hearth, the use of copper stave to extend the life of the furnace, the mechanization of the yard and the use of large construction methods to shorten the overhaul period, which greatly improved the function and life of the blast furnace and Minimize production losses when overhauling. This article describes these new technologies and their main contents.