Black Foundry Chromite sand is a high-quality sand primarily composed of chromite (FeCrO), a naturally occurring mineral that is rich in iron and chromium. It is widely used in the foundry industry for manufacturing molds and cores due to its excellent refractory properties, high melting point, and ability to withstand thermal shock. This makes it ideal for casting ferrous and non-ferrous metals, particularly in high-temperature processes. Chromite sand's low thermal expansion and good wear resistance also make it suitable for steel and alloy casting.
Additionally, its resistance to chemical reactions at high temperatures enhances the durability and precision of molds, providing superior surface finishes for metal castings.
The high specific gravity and high thermal conductivity of chromite provide a pronounced chilling effect. Chromite sand has a glossy black appearance. Chromite is generally used for steel casting to provide chilling. �°t is difficult to reclaim chromite sand since, if it becomes contaminated with silica, its refractoriness is seriously reduced.
Foundry chromite sand is a natural process products of chromite through the broken screen classification, chrome ore, its main chemical composition of cr2o3, this kind of sand heated volume stability, high thermal conductivity, when in contact information with the molten metal, not only has good resistance to basic slag, not with ferric oxide and other chemical reactions, and itself has the characteristics of the solid phase sintering, can be a very good prevent the infiltration of molten metal, avoid to touch sand defects, suitable for all kinds of stainless steel, alloy steel and carbon steel gradually shape the original sand core and coating.
Foundry chromite sand is a natural process products of chromite through the broken screen classification, chrome ore, its main chemical composition of cr2o3, this kind of sand heated volume stability, high thermal conductivity, when in contact information with the molten metal, not only has good resistance to basic slag, not with ferric oxide and other chemical reactions, and itself has the characteristics of the solid phase sintering, can be a very good prevent the infiltration of molten metal, avoid to touch sand defects, suitable for all kinds of stainless steel, alloy steel and carbon steel gradually shape the original sand core and coating.
AFS40/50 45/55 Chromite sand foundry grade
We Import Chrome ore from South Africa,wash,dry,sieve,test,pack in China port,then export from China port.
The specification is as follows:
Cr2O3:46.0%min
SiO2:1.0%max
FeO:26.5%max
CaO:0.30%max
MgO:10.0%max
Al2O3:15.5%max
P:0.003%max
S:0.003%max
PACKING:1MT big bag
SIZES:AFS 25-35 AFS25-30 AFS30-35 AFS35-40 AFS40-45 AFS45-50 AFS50-55 AFS55-60 AFS60-65
Foundry Chromite sand is a natural process product of chromite through the broken screen classification, chrome ore, its main chemical composition of cr2o3, this kind of sand heated volume stability, high thermal conductivity, when in contact information with the molten metal, not only has good resistance to basic slag, not with ferric oxide and other chemical reactions, and itself has the characteristics of the solid phase sintering, can be a very good prevent the infiltration of molten metal, avoid to touch sand defects, suitable for all kinds of stainless steel, alloy steel, and carbon steel gradually shape the original sand core and coating.
Foundry chromite sand is a natural process products of chromite through the broken screen classification, chrome ore, its main chemical composition of cr2o3, this kind of sand heated volume stability, high thermal conductivity, when in contact information with the molten metal, not only has good resistance to basic slag, not with ferric oxide and other chemical reactions, and itself has the characteristics of the solid phase sintering, can be a very good prevent the infiltration of molten metal, avoid to touch sand defects, suitable for all kinds of stainless steel, alloy steel and carbon steel gradually shape the original sand core and coating.
Foundry chromite sand for foundry use as a highly fireproof sharpener for moulds and cores. Originally from South Africa. The sand is produced by crushing chrome ore and its washing in spiral concentrators, subsequent drying, dust cleaning, screening and sorting as per grain size.
Physical composition
Bulk Density 2.5-3g/cm3
Specific Gravity 4.0-4.8g/cm3
PH Value 7-9
The amount of the acid 2ML max
Percent soil 0.1%max
The sintered 1600
Filling Density 2.6g/cm3
melting temperature 2180°C
