Stuffing sand, also called drainage sand or filling sand, is a filling refractory material used at the bottom of the ladle. It is an important refractory for the steel casting. Ingredient of 20-40
mesh foundry stuffing sand is Aluminum trioxide with small amount of silica.
We import natural chromite ore from south africa,then wash,dry,and sieve in china lianyungang port. Cr2O3:46.0%min SiO2 :1.0%max FeO :26.5%max CaO :0.30%max Bulk Density:2.5-3 Color:Black PH:7-9 Percent Moisture:0.1%max ...