Chromite sand
Top quality foundry chrome ore lumpy manufacturer south africa, also known as chromite sand, is a special sand for foundry.
It is a natural spinel dominated by chromite. After crushing, grinding and sieving, it is divided into prescribed grain size, and is suitable for sand for moulding (core-making).
Chromium ore sand can be divided into two grades according to chemical composition,first grade Cr2O3 (> 45%) and second grade Cr2O3 (> 35%).
The Advantage of Chromeite Sand
Comparing with silica sand,chromite sand can avoid most sand stick on the casting，therefor it can also save cost to make surface treatment. Moreover，chromite can be recycle used for several times upon to different technology.
Over all the chromite ore in the world,the one from South Africa are of the best quality level.So HAIXU Abrasive import original chromite ore from there and refine it to better purity to 46% Cr2O3.
CHEMICAL&PHYSICAL PROPERTIES
| 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 | 2.5-3g/cm3 |
| Color | Black |
| PH | 7-9 |
| The amount of the acid | ≤ 2 ML |
| Percent soil | ≤0.1 |
| Percent Moisture | ≤0.1 |
| The sintered | 1600℃ |
| Percentage of free acid present in the sand | 0 |
| Filling density | 2.6g/cm3 |
| Sintering point | > 1,800℃ |
| Melting temperature | 2,180℃ |
AVAILABLE SIZES
0-1mm 1-3mm
AFS 25-35 AFS25-30 AFS30-35 AFS35-40 AFS40-45 AFS40-50 AFS45-55
AFS45-50 AFS50-55 AFS55-60 AFS60-65 200mesh 325mesh 400mesh
MAINLY APPLICATIONS
Chromite Sand in the foundry industry
Its properties enable the material to be used in high duty grey iron and steel foundries as core and mould making sand. Its high thermal conductivity gives it good chilling properties, low thermal expansion gives rise to good dimensional stability. Its basicity being close to neutral allows the use of a wide range of resin bonding systems and inorganic binders, it has a high refractoriness and a broad sieve distribution.
Chromite Sand in the steel industry
In steel production, Chromite Sand is used as well filler for protection of the sliding gate in large steel holding ladles.
Chromite Sand in the glass industry
When ground to a fine flour, Chromite Sand is used for the production of green glass beverage containers.
PACKAGING :1mt big bag
