铝及铝合金的熔炼,广泛采用的冶金炉是火焰炉,按形成火焰的可燃物质分类,有燃煤反射炉、燃焦反射炉、重油炉、天然气和煤气反射炉等等。在这些火焰炉的烟道中,通常有沉积物存在,这些沉积物中含有多量的碱金属硫酸盐。据国外资料报道,这种沉积的碱金属硫酸盐,在一定条件下有产生爆炸的危险。本文就引起爆炸的反应、硫酸盐生成的条件、烟道中硫酸盐沉积规律和防止爆炸的途径,作一些初浅的讨论。 Aluminum and aluminum alloy smelting, widely used metallurgical furnace is a flame furnace, according to the formation of the flammable material classification, a coal fired reflex furnace, combustion reflex furnace, heavy oil furnace, natural gas and gas reflex furnace and so on. In the flue ducts of these furnaces, there are usually deposits that contain large amounts of alkali sulfates. According to foreign data reports, this deposition of alkali metal sulfate, under certain conditions, there is the risk of explosion. In this paper, some preliminary discussions are made on the reactions that cause explosions, the conditions of sulfate formation, the deposition rules of sulphate in the flue and the ways to prevent explosions.