... PPi, etc. 4.large, medium, small type Ceramic Filter Plate Ceramic foam filters are made from ceramic corundum with excellent thermal quench, thermal conductivity ... all kinds of melting furnaces.Designed to suit customers requirements. Type of tap hole cones: large, medium, small. Zhongnan Machinery ... Ltd7,Wujiang Longma Aluminum Co., Ltd8,Interthai Manufacturing Co., Ltd Ceramic Filter Plate