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铁水流孕育和包内孕育相结合的复合孕育方法,是目前炉前处理中锰抗磨球铁时所采用的主要强化孕育方式。我们把占铁水重量0.15～0.20％的食盐在经200～250℃烘烤30min去除水分后,和硅铁、锰铁混合,随铁水流冲入浇包内,充分搅拌扒渣,浇出的铸件质查良好。我们认为,食盐有以下几个方面的作用。1.作清渣剂。炉前处理中锰抗磨球铁时,在浇包内和铁水流中因加入了较多的硅铁、锰铁和一定量的稀土镁中间合金,包内熔渣多且熔渣粘度大,难于清除。但铁水一旦经食盐处理后,熔法表面张力减小,烙渣较易清
The combination of inoculation of iron and water and inoculation of the bag inoculation method is the main method of strengthening inoculation used in the processing of manganese anti-wear ductile iron in the furnace. We take the weight of hot metal 0.15 ~ 0.20% of the salt after 200 ~ 250 ℃ baking 30min to remove water, and ferrosilicon, ferromanganese mixed with molten iron flow into the ladle, the full mixing slag, casting pouring Good quality check. We believe that salt has the following aspects. 1. For cleaning agent. During the processing of manganese anti-wear ductile iron in the furnace, more ferrosilicon, ferromanganese and a certain amount of rare earth magnesium intermediate alloy are added in the ladle and the molten iron flow, the slag in the bag is large and the viscosity of the slag is large, Difficult to remove. However, once the molten iron by salt treatment, the melting surface tension decreases, the slag easier to clear