Zirconium sand is widely used in foundry industry. The following are its specific uses:

I. Precision casting molding sand

Zircon sand is widely used as molding sand in precision casting because of its high melting point (above 2550℃), low thermal expansion and good chemical stability. It can effectively prevent the chemical sand sticking and mechanical sand inclusion of castings at high temperature, improve the surface smoothness of castings and refine the surface structure of castings. This characteristic makes it especially suitable for manufacturing precision castings of stainless steel, alloy steel and other alloy materials.

II. Mold coating

Zirconium sand powder is the main component of coating for casting. In investment casting, zircon sand powder is used to make surface slurry and sand. Its good high temperature resistance and chemical stability can ensure the stability of the mold at high temperature and prevent the surface defects of the casting.

III. Mold materials

Zirconium sand containing 65% ~ 66% ZrO is directly used as the mold material of iron metal in foundry because of its excellent melting resistance (melting point above 2500℃). It has lower thermal expansion and higher thermal conductivity, and has stronger chemical stability compared with other common refractory materials.

IV. Glass kiln bricks

Zirconium sand is also used to make zircon bricks in glass kilns. This kind of brick has excellent high temperature resistance and corrosion resistance, which can effectively prolong the service life of glass kiln.

V. Other casting applications

Lost foam casting: zircon sand can be used as molding sand for lost foam casting to ensure the high quality of castings.

Resin sand casting: Its good particle size distribution and chemical stability make it an ideal material for resin sand casting.

Sodium silicate sand casting: Zirconium sand is also widely used in sodium silicate sand casting, which can improve the surface quality and dimensional accuracy of castings.

To sum up, zircon sand is mainly used in precision casting sand, mold coating, mold material and glass kiln brick in the casting industry, and its excellent high temperature resistance and chemical stability make it an indispensable and important material in the casting industry.