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高炉大型化,炉体寿命有所降低(6年左右)。国外特别是日本进行了许多调查研究与试验改进工作,大型高炉炉龄延长了,八十年代炉龄可达10年,而且一代无中修,只是晚期喷补炉衬1～2次。国内高炉炉体寿命虽有8年,但需中修1～2次,与国外差距大。在使用炭砖以前,影响炉体寿命的主要因素是炉缸,炉底的破损。1963年11月冶金部曾组织高炉、热风炉寿命调查组对19个厂
Large-scale blast furnace, furnace life has been reduced (about 6 years). Many foreign countries, especially Japan, conducted many investigations and experiments to improve the furnace. Large-scale blast furnaces have been extended in furnace age, with a furnace age of up to 10 years in the 1980s and a generation without intermediate repairs. Although the domestic blast furnace body life of 8 years, but need to repair 1 or 2 times, and the gap between foreign countries. Before using the carbon brick, the main factor affecting the life of the furnace is the hearth, hearth damage. In 1963 November the Ministry of Metallurgy had organized blast furnace, hot stove life investigation team to 19 plants