Furnace throat steel bick has good performance in hudraulic pressure test protect the throat part of blast furnace. 1. Furnace throat stleel brick mormally includes two types which are water-cooling furnace throat steel brick and nonwater-cooling furnace throat steel brick. The main materials are ZG35,ZG35CrMnSi,QT40-18,ZG4Cr16Mn13Ni2,ZG40Gr9Si2 and so on. 2. In the manufacturing process of ...