What are the uses of AFS45-55 chromite sand?
chromite sand: Its main component is chromite (FeO·Cr₂O₃). It offers high-temperature resistance, excellent thermal stability, and strong resistance to alkaline slag corrosion.AFS: Abbreviation for the American Foundry Society.
Generally speaking, AFS 45-55 chromite sand refers to chromite sand with an average particle size in the medium-fine range.
Main Applications
1. Foundry Industry (Main Application)
In the foundry industry,：chromite sand particularly for producing large, complex, or high-quality steel castings. •
Foundry Sand and Core Sand: Due to its excellent resistance to metal penetration, sand molds and core sand castings made with it have smooth surfaces and are free of sticking defects. The fineness of AFS 45-55 enables the creation of finer pattern surfaces.
Face Sand: In sand molds, a layer of more expensive chrome sand (as face sand) is typically used only on the surface of the mold cavity
2. Refractories
Chrome sand is an important raw material for the production of various refractories. •
•Ramming and repair material manufacturing: Used to fill and repair cracks and damage in industrial furnaces.
Why choose AFS 45-55?
chromite sand AFS45-55 can provide good surface finish and sufficient permeability.
Penetration resistance: The medium-fine grain size makes the sand mold denser, effectively preventing molten metal from penetrating the gaps between the sand grains, thereby minimizing the defect of “mechanical sand sticking.”
Summary
AFS 45-55 chromite sand is a medium-fine chromite sand. Its core values lie in:
1.Excellent fire resistance and chemical stability: It can withstand extremely high molten steel temperatures and resist slag corrosion.
2.High thermal conductivity: It can serve as a chilling material, optimizing the solidification process of castings.
3.Excellent resistance to metal permeation: It produces high-quality castings with smooth surfaces.