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浸入式水口位于连铸机中间罐和结晶器之间,它能使钢水流动平稳,并能防止钢水二次氧化与跑钢。当浸入式水口刚出现时,氧化铝-石墨(A-G型)水口即得以发展了。但比较起来,熔融石英水口的使用更为普遍,因为石英的热膨胀系数小,耐热冲击性能良好,而且管理也方便。 1974年以来,随着连铸生产从追求数量转向追求质量的变化,也从经济效益出发,使用了经久耐用的A-G型水口。又经过多方面的改进,从而使A-G型水口得以广泛应用。一、A-G型水口的特性 A-G型水口所以能得到很快的发展,是因为它综合具备了石墨的化学惰性和高的导热
Immersion nozzle is located in the middle of the continuous casting machine between the tank and the mold, it enables the smooth flow of molten steel, and to prevent secondary oxidation of steel and running steel. Alumina-graphite (Type A-G) nozzles developed when the submerged entry nozzle just emerged. However, in comparison, the use of fused silica nozzle is more common, because of the small thermal expansion coefficient of quartz, good thermal shock resistance, and management is also convenient. Since 1974, as the continuous casting production has shifted from the quest for quantity to the quest for quality, the durable A-G nozzle has also been used for economic efficiency. After many improvements, so that A-G-type nozzle can be widely used. First, the A-G-type nozzle features A-G-type nozzle so it can be developed rapidly, because it has a combination of chemical inertness of graphite and high thermal conductivity