Zhengzhou Hongji Machinery Manufacturing Co.,Ltd Was found in 1968, professional in LWA, Leca equipments manufacturing. Abstract: Lightweight aggregate raw material is wide, it can be clay, mudstone, slate, coal gangue, fly ash, shale, sullage and the industrial waste, after crush and pellet, the raw material was fed to the rotary kiln, then come out to be the LWA. It is widely used in metallurgy ...