... mainly used for fireproof materials (commonly called zirconium fireproof materials such as corundum bricks and zirconium fireproof fiber), sand for casting mould ... in the production of glass, metal (zirconium sponge) and zirconium compounds (zirconium dioxide, zirconium oxychloride, sodium zirconate, zirconium potassium fluoride, zirconium sulfate, etc.). ItemSY8SY6Zr Content (ZrO2)≥66 ...