Chromite Foundry Sand Supplier | High-Quality Chromite Sand

Chromite Foundry Sand

Chromite foundry sand, with its main chemical component Cr2O3, boasts thermal stability, high thermal conductivity, and excellent resistance to alkali slag. It prevents metal penetration and sand sticking, making it ideal for various stainless steel, alloy steel, and carbon steel core-making applications.

Available Size

AFS25-35
AFS25-30
AFS30-35
AFS35-40
AFS40-45
AFS45-50
AFS40-50
AFS50-55
AFS55-60
AFS60-65

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Features

Exceptionally high hardness suitable for producing hard materials.
Superior corrosion resistance, protecting metals against corrosion for durable metal products.
Excellent thermal stability, capable of withstanding high-temperature environments.
Good electrical conductivity, applicable in electronic product manufacturing.
High reflectivity, suitable for optical products like lenses.

Applications

Substitute for part of cold iron in core-making, serving as refractory aggregate in foundry coatings.
Suitable for drainage sand raw materials, foundry, ceramics, glass, and refractory materials.
Used in large steel castings to prevent sand sticking on the casting surface.
Employed as refractory aggregate in foundry coatings, substituting part of the cold iron.
Applicable in foundry coatings, refractory materials, automotive brake pads, high-performance ceramics, ceramic and glass colorants, friction materials, chemical, and metallurgical casting industries.

Typical Chemical Analysis

Cr2O3	≥46.0%
SiO2	≤1.0%
FeO	≤26.5%
CaO	≤0.30%
MgO	≤10.0%
Al2O3	≤15.5%
P	≤0.003%
S	≤0.003%
Cr/Fe	1.55:1

Typical Physical Properties

Bulk Density	2.5-3g/cm³
Volume Density	4.0-4.8g/cm3
Color	Black
PH Value	7-9
Sintering Temperature	>1,800°C
Melting Point	2,180°C

Test Report

Production Flow

Step 1

Raw material preparation: chromite ore, already crushed into powder in South Africa, undergoes water washing to screen particle size, eliminating impurities and mud.
Step 2

Drying step: the washed raw material is dried to remove moisture.

Step 3

Particle sizing: The dried material is then passed through a vibrating sieve to attain the desired particle size required by customers.
Step 4

Magnetic separation: Sieved particles undergo magnetic separation to remove iron and silicon. Post-separation, chromite content reaches above 46%, while silicon content remains below 1%.
Step 5

Packaging: the processed material is then packaged as finished products.

FAQs

Can your company provide customized packaging?

Yes, we can. Our company can collaborate with packaging factories we've worked with for years to customize various special packaging or labels for customers.

Where does your chromite foundry sand originate from?

Our raw materials come from imported materials from South Africa, which are processed in bonded zones before being sold domestically or internationally. After deep processing, the chromium content of our chromite foundry sand exceeds 46%. Chromite foundry sand has stable volume when heated, high thermal conductivity, and when in contact with molten metal, it not only exhibits excellent resistance to alkaline slag, but also does not react chemically with iron oxide. Moreover, it has the characteristics of solid-phase sintering, which can effectively prevent the penetration of molten metal and avoid the occurrence of sand sticking defects.

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