It is mainly used to pass cast iron scrap, copper scrap, aluminum scrap, steel scrap (≤50mm), crushed material (50 ~ 80mm) and other waste materials through a special mold, so that it can withstand high pressure on a very small area to be pressed into blocks It greatly facilitates the transportation of metal shavings, and reduces the amount of oxidation and burning loss during the smelting process to obtain significant economic benefits.