新环保形势下对消失模铸造的再思考

Reconsideration of Lost Foam Casting Under the View of Environmental Protection

当前我国环保工作已进入全新时期,挥发性有机化合物成为大气污染防治新的工作重点。消失模是一项新的铸造工艺,利用聚苯乙烯遇高温气化消失的特性生产铸件,简化了铸造流程、提高了效率,被认为是清洁绿色的工艺,但该过程的废气问题一直重视不够,消失模废气产生严重的挥发性有机化合物污染,其治理尚存一定困难,该工艺的环境影响和经济优势值得重新思考。

At present,the environmental protection work of China has entered a new period,and volatile organic compounds(VOCs)have become a new focus of air pollution control.Expendable casting(EPC)is a new casting process,which makes use of the characteristics of polystyrene vaporization vanishing at high temperature to produce castings.It simplifies the casting process and improves the efficiency.It is considered as a clean and green process,but the problem of exhaust gas in this process has been neglected.The control of volatile organic compounds is imperative under the new environment protection situation.It is difficult to treat the volatile organic compound pollution caused by the lost mode exhaust gas.The environmental impact and economic advantages of this process deserve to be reconsidered.