当代高炉一代寿命,主要取决于炉身下部、炉腹和炉腰内衬的寿命。虽然影响寿命的因素很多,但如何得到一种耐磨损性能好、抗炉渣、抗碱金属侵蚀性强和导热性好,而价格又适宜的耐火材料,是高炉工作者最关注的问题。五六十年代,在高炉身用 Al_2O_3含量45%～50%的致密型高铝砖,至今仍在用。其优点:抗磨性好、抗氧化性强,但抗热震稳定性差,易受碱的侵蚀。 The lifeblood of contemporary blast furnaces depends primarily on the life of the lower part of the shaft, the bosh and the lining of the waist. Although many factors affect life expectancy, how to get a good wear resistance, anti-slag, anti-alkali metal corrosion resistance and good thermal conductivity, and affordable refractory materials, blast furnace workers are most concerned about. In the fifties and sixties, dense alumina brick with 45% ~ 50% Al 2 O 3 content in the blast furnace was still used. Its advantages: good abrasion resistance, oxidation resistance, but poor thermal shock resistance, susceptible to alkali erosion.