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Study on Technology of Iron Removal during Recycling of Shell of Investment Casting

Recycling of the shell of investment casting is meaningful. However，there are many factors which hamper the progress of this work, and one of these is that the Fe content is difficult to reach the standard under the present technological conditions. Through investigating and analyzing the sources of Fe in three factories which produce steel casting and a factory which is engaging in recycling of the shell of investment casting, a new idea which suggested to remove iron through controlling import of Fe form sources was put forward in this paper. To realize this idea, corresponding measures was suggested, such as classifying the shell, picking iron out manually, storing the shell appropriately, and selecting reasonable equipment for recycling processing.