一、引言为了延长每一炉役的寿命和减少总的生产费用,日本的高炉是全炉役操作,没有中修。日本高炉每一炉役的累积产量示于图1。某些已停产的大型高炉一代的累积产量已达7～8千吨/米~3,许多正在生产的大型高炉,累积产量已经超过5000吨/米~3的水平,由于高炉设备和操作技术的进步,一代炉役的寿命超过十年是很平常的。 I. INTRODUCTION In order to prolong the service life of each furnace and to reduce the total production cost, the blast furnace in Japan is fully furnace-operated with no intermediate repair. The cumulative production of each blast furnace in Japan is shown in Figure 1. The cumulative production of some large-scale blast furnaces that have been discontinued has reached 7-8,000 tons / m3. Many large-scale blast furnaces under production have accumulated production levels of more than 5,000 tons / m3. As a result of blast furnace equipment and operating technologies Progress, a generation of furnace service life is more than ten years is very common.