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How to Choose chromite sand grit size

Chromite sand is suitable for steel casting including foundry such as:

Green Sand molding;

Shell molding;

Pep-Set system;

Furan Resin and Alkaline-phenolic Resin;

Core moulding

Lost foam casting

 

How to Choose grit size?

Generally,the smaller casting need to make, the finer grit size foundry adopted.The following frame shows it for reference:

Less than 500KGS500-1000KGS1-10 Tons10-30 Tons30-100 Tons
AFS40-70AFS 45-50AFS 45-50AFS40-45AFS 35-40

Specification

CHEMICAL COMPOSITION
Cr2O3≥46.0%
SiO2≤1.0%
FeO≤26.5%
CaO≤0.3%
MgO≤10%
AL2O3≤15.5%
P≤0.003%
S≤0.003%
Cr/Fe1.55:1
TYPICAL PHYSICAL PROPERTIES
Hardness:Mohs:5.5-6
Melting Point:Sublimes at 2180 ℃
Sintering point:>1800℃
The sintered1600℃
Specific Gravity:4.0-4.8 g/cm3
Bulk density(LPD):2.5-3 g/cm3
Color:Black
PH7-9
Percentage of free acid present in the sand0%
The amount of the acid≤2ML
Percentage of soil≤0.1
Percentage of Moisture≤0.1
AVAILABLE SIZES
AFS15-20,AFS15-25,AFS25-35,AFS25-30,AFS30-35,AFS35-40,AFS40-45,AFS45-50,AFS40-50,AFS50-55,AFS55-60,AFS60-65 customized sizes are available upon request

 

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