High-Quality Alumina Silicate Sands for High-Heat Environments
Refractories are critical for building kilns, crucibles, and furnace linings for metallurgical, glass-making, and ceramics applications. Alumina silicate sands make extremely effective refractories—owing to their broad range of desirable properties, including their ability to:
- Withstand high temperatures and sudden temperature shifts without deformation
- Handle molten and abrasive/corrosive materials
- Exhibit a low coefficient of thermal expansion
- Conserve heat
- Avoid contaminating materials (due to their chemical inertness)
About AlZiPure™ Foundry Sand
The Chemours Company produces AlZiPure™ foundry sand to meet the unique needs of foundry applications.
AlZiPure™ foundry sand is a high-quality blend of alumina silicate sands that are well-graded and have clean, sub-rounded to sub-angular surfaces.
AlZiPure™ is a uniform blend, and has been processed and thoroughly washed to remove dirt, dust, and ultrafines that can negatively affect performance. AlZiPure™ sand is composed primarily of the alumina silicate isomorphs kyanite and sillimanite (Al₂SiO₅), but corundum (Al₂O₃) and zircon (ZrSiO₄) are also present in the blend.
The Chemours Company mines AlZiPure™ foundry sand from mineral deposits in the southeastern United States.
Benefits and Features of AlZiPure™ Foundry Sand
AlZiPure™ foundry sand sets itself apart from the competition by providing useful features, including:
- Less than 1% free silica
- Resistance to heat
- High dimensional stability
- Corrosion resistance
- Mechanical strength
- Bulk density greater than alumina and silica sand
- Reclaimable by mechanical, thermal, and microwave methods
Specialty Applications for AlZiPure™ Foundry Sand
AlZiPure™ foundry sands can be used in refractory and ceramic applications, along with foundry applications.
The unique physical properties of AlZiPure™ products make them an excellent choice for several specialty refractory segments, including the manufacture of refractory bricks and mortars.
AlZiPure™ foundry sands can be used as:
- Core and mold sands
- Facing sands
- Replacements for specialty sands (e.g., chromite, olivine, or zircon in many applications)
When used as a core and mold or facing sand, AlZiPure™ foundry sands provide improved surface finish compared with silica sand molds with less burn- in, erosion, and penetration on the surface of the casting.
AlZiPure™ has proven results with carbon steel, low-alloy steel, cast iron, and other common casting metals in greensand, no-bake, and resin-coated applications.
AlZiPure™ is available in:
- Semi-bulk (2-ton) bags
- Bulk hopper rail cars
- Bulk pneumatic trucks
View the AlZiPure™ Product Information Sheet to learn more.