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我厂生产的Y_B32-500 t四柱万能液压机、D99-16OW·4-4摆碾机,铸件毛坯重8～13 t。多年来,我们都是用稻草灰作保温集渣剂生产的。实践证明,稻草灰不能很好地把稀散性熔渣粘连在一起,浇注过程中,当包内不足一半铁水时,片状的熔渣与稻草灰混合物常掉入浇口杯流入型腔,从而使铸件产生夹渣缺陷。多年来的生产统计表明,我厂中大型铸件,因夹渣而报废的铸件约占全年铸件废品率的30～50％左右。
I plant Y_B32-500 t four-cylinder universal hydraulic machine, D99-16OW · 4-4 pendulum mill, casting rough weight 8 ~ 13 t. Over the years, we have used straw ash as insulation slag agent production. Practice has proved that the straw ash can not be very good adhesion of sparse slag together, pouring process, when the package less than half of the molten iron, the flake mixture of straw and straw often fall into the pouring cup into the cavity, which Make castings have slag defects. Production statistics over the years show that large castings in our plant, due to slag scrap and castings accounted for the annual casting scrap rate of about 30 to 50%.