This article introduces the design and work parameters for expander and the technology of expanding process to turn discarded protein of feather, pigfur and blood into high-quality forage.

• 介绍了膨化机的设计和工作参数，以及将羽毛、猪毛、猪血等废弃蛋白质资源变成优质饲用蛋白的膨化加工工艺。