珍珠岩是一种理想的保温集渣材料。但在使用中,有时会出现膨胀后的珍珠岩挂在浇包壁上的情况,因此不能对铁水起到保温效果,而且只有在珍珠岩渣层冷却以后才能清理掉。解决的方法是,在铁水表面覆盖珍珠岩以后,用一根φ10的铁棒(最好涂上炭灰水再预热过),沿铁水包四周轻轻划一圈,使珍珠岩与包壁脱开。这 Perlite is an ideal thermal insulation slag material. In use, however, there is sometimes the case that the expanded perlite hangs on the ladle wall so that it does not have a heat insulating effect on the hot metal and can not be cleaned until the perlite layer cools down. The solution is, after the surface of the hot metal covered with perlite, with a φ10 iron bar (preferably coated with charcoal water and then preheated), gently lap around the ladle, the perlite and the cladding off open. This