过去,铸件采用草木灰作覆盖剂,浇注过程中由于挡渣不利,致使铸件形成渣眼缺陷而报废。铸件的渣眼废品占废品总数的52%,为了降低成本,提高铸件的成品率,我们采用了珍珠岩覆盖剂。 铁水表面采用草木灰覆盖时,由于草木灰在铁水表面分散,不能 In the past, the use of ash as a coating of castings, pouring process due to slag adverse, causing the formation of slag eye defects and scrapped. Slag waste castings accounted for 52% of the total waste, in order to reduce costs and improve the yield of castings, we use perlite covering agent. When the surface of molten iron is covered with grass ash, ash can not be dispersed on the surface of molten iron