... iron,cast steel 5.H.S code:2530102000 Perlite Ore is used in many Ferrous and Non-ferrous ... left on the refractory by the perlitePerlite in the ore form is used in high temperature applications in ... in exothermic and insulating sleeves and as a cushioning1.Perlite ore Size12-16mesh, 14-20mesh, 16-32mesh, 20-40mesh ... 2-1.4 900-1000 5-103.Raw perlite ore for foundry applications:Cast iron ,cast steel ,cast ...