膨胀珍珠岩保温冒口的补缩效果和经济效益是很显著的,这已为生产实践所证实。我厂根据沈阳铸造研究所与沈阳冶金机械厂研究成功的“膨胀珍珠岩保温套和石墨渣覆盖剂保温冒口”这一成果,并在学习昆明冶金机械厂和韶关铸锻厂等应用经验的基础上,结合我厂的具体条件,在1984年7月对这一新的工艺技术进行了初步验证,8月份即全面推广应用于铸钢件生产上,取得了良好的效果。一、膨胀珍珠岩保温冒口生产应用情况1.保温冒口套材料选用 Replenishment effect and economic benefits of the expanded perlite insulation riser are significant, as evidenced by production practices. I plant under the Shenyang Institute of Foundry and Shenyang Metallurgical Machinery Factory successful study of “perlite insulation cover and graphite slag covering agent insulation riser” of this result, and learning Kunming Metallurgical Machinery Factory and Shaoguan Casting and Forging Plant and other application experience Based on the specific conditions of our factory, the new process technology was preliminarily verified in July, 1984, and in August, it was fully popularized and applied to the production of steel castings and good results were achieved. First, the expansion of perlite insulation riser production applications 1. Insulating riser material selection