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Keyword "foundry grade chromite sand"
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foundry grade chromite sand AFS15-25 foundry grade chromite sand AFS15-25

Brief production of Chromite foundry casting sand

 

Chromite sand , Originally from South Africa (SAMANCOR),is a special kind of sand for casting , chromite sand is a natural spinel mainly composed of chromite ,

 

Chromite sand used as a highly fireproof sharpener for moulds and cores.

Chrome ore sand,It’s main chemical composition is Cr2O3, This kind of sand heating volume is stable , High thermal conductivity , sand molten metal contact , not only has a good  alkali slag resistance , not with iron oxide and other chemical reaction , and itself has the characteristics of solid phase sintering , can well prevent the penetration of molten metal , avoid sand defects .

Chemical  Properties

Item

Index %

Cr2O3

46.0min

SiO2

1.0max

FeO

26.5max

CaO

0.30max

MgO

10.0max

Al2O3

15.5max

P

0.003max

S

0.003max

Cr/Fe

1.55 1

Physical  Properties

Bulk Density

2.5-3 g/cm3

Color

Black

PH

7-9

The amount of the acid

2ML(MAX)

Percent Soil

0.1% max

Percent Moisture

0.1% max

The Sintered Point

1600 C

Filling Density

2.6 g/cm3

Sintering Point

1800 C min

Melting Temperature

2180 C

Percentage of Free Acid Present in the Sand

0

 

 

 

 

 

 

 

 

 

 

 

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SIZE OF Chromite sand

Available Size: AFS35-40, AFS40-45, AFS45-50, AFS50-55, AFS55-60, AFS60-65

 

Application of Chromite sand

Chromite sand is used as a highly fireproof sharpener for moulds and cores.

Chromite sand is suitable for all kinds of molding (core-making ) sand, stainless steel , Alloy steel and carbon steel gradually modeling core sand and paint 

[Related Categories: Cast & Forged ]
[Related Keywords: foundry grade chromite sand ]
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