Chromite sand is a natural sand with high density. The specific gravity of 46% Cr2O3 chromite sand is 4.6-4.8 g/cm3. And the bulk density is 2.6-2.8 g/cm3. That is much heavier than other sand materials. Thus, Chromite sand can works as heavy sand in many applications.
The specific gravity of natural chromite ore is generally between 4.0 and 4.8 g/cm³. The specific gravity of foundry chromite sand is higher, and the value of 46% chromite sand is higher than 4.5 g/cm³.
Foundry chromite sand has special requirements for particle size distribution and high requirements for the proportion of each sieve segment. When testing particle size and AFS value, manual seive inspection and automatic seive inspection can be used for testing, and there are certain differences between the two.
Chromite flour 75 μm （200mesh） is a superior refractory mineral for foundry coating and glass & ceramic pigment. It has the following properties
Foundry chromite sand has become a commonly used foundry sand in the fields of machinery and equipment, railway parts, etc. due to its excellent refractory temperature, resistance to steel sand erosion, anti-sticking sand, strong thermal conductivity, and high cost performance. The chromium content of chromite sand for foundry is not less than 46%, and the silicon content is not more than 1%.
Chrome ore foundry sand AFS 45/55 (particle size of about 0.25-0.35mm) is used as casting sand for railway turnout accessories. With its unique physical and chemical properties, it has excellent performance in high temperature stability and resistance to metal penetration.
