In the foundry industry, expanded perlite is most commonly mixed with exothermic powders and used in ladel topping, hot topping, and risering to prevent shrinkage cavities. Perlite is used as an insulating cover on the surface of molten metal to: •Prevent excessive heat loss during pouring delays •Topping off ingots •Producing refractory blocks and brings •Acting as a lightweight castable

  • perlite
  • slag
  • foundry
Share on: