Zircon is extremely resistant to high temperature, its melting point reaches 2750  degree and is resistant to acid corrosion. 80% of the world's zircons are directly used in casting, ceramics, glass industry and the manufacture of refractories. A small amount of zircon is used in ferroalloy, medicine, paint, leather, abrasive, chemical and nuclear industries. A very small amount of zircon is used to smelt metal zirconium. Zircon sand containing ZrO265%-66% is directly used as mold material for foundry iron because of its melting resistance (melting point above 2500  degree).
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Acid resistance of zircon