|
Physical and
Chemical Index
|
|
Item
|
Unit
|
Index
|
|
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
|
|
Bulk Density
|
g/cm3
|
2.5-3
|
|
Color
|
/
|
Black
|
|
PH
|
/
|
7-9
|
|
The amount of
the acid
|
/
|
≤ 2 ML
|
|
Percent soil
|
%
|
≤0.1
|
|
The sintered
|
°C
|
1600
|
|
Percentage of
free acid present in the sand
|
%
|
0
|
|
filling density
|
g/cm3
|
2.6
|
|
sintering point
|
°C
|
> 1,800
|
|
melting
temperature
|
°C
|
2,180
|
|
PACKING:
|
1MT big bag
|
|
SIZES:
|
AFS35-40
AFS40-45 AFS45-50 AFS50-55 AFS55-60 AFS60-65
|
Chrome
ore sand ,Its 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 ,
suitable for all kinds of stainless steel , Alloy steel and carbon steel
gradually modeling core sand and paint .
Chromite sand
, Is a special kind of sand for casting , It is a natural spinel mainly
composed of chromite ,It is crushed , ground and screened into specified grain
size , which is suitable for molding (core-making ) sand