... ,10,13,19,25,38,50mm 99% High Alumina Ball for Ethylene Dryers XINGFENG 99% High Alumina Support Media is equal ... silica (SiO2 ), it's a very excellent and ideal product for high temperature and steam applications, such as secondary reformers in ... high-temperature resistance 1550°C , also it's a good choice for heat retention or equilibration media. Chemical composition Al2O3Fe2O3MgOSiO2Na2OTiO2>99%<0 ...