Olivine is an ultrabasic mineral having a high melting point of 1800 (°C).Olivine Sand is both used in ferrous and non ferrous metal castings
olivine sand has a low thermal expansion rate compared to silica sand. Foundry grade olivine sand produces castings with smoother surface finish, closer dimensional control and Reduced burn-in penetration defects.
Olivine are incompatible with free silica because they are less chemical reactive which Provides high standard work environment and safety performance for foundry men.
TYPICAL CHEMICAL ANALYSIS
Olivine |
Mgo |
SiO2 |
Fe2O3 |
CaO |
Al2O3 |
LOI |
Grade 1 |
46-44% |
46-44% |
9-12% |
Max 2% |
1.5-1.8% |
1-2% |
Olivine |
Mgo |
SiO2 |
Fe2O3 |
CaO |
Al2O3 |
LOI |
Grade 2 |
39-42% |
35-37% |
7-10% |
2-3% |
2.5-3% |
9-11% |
Properties
Bulk Density |
Hardness |
Melting Point |
Thermal Expansion |
Thermal Conductivity |
Free Silica Content |
Specific Gravity |
1.7-1.8 g/cm3 |
7 Mohs at 20 Deg C |
1750 Deg C |
0.0083 in/in |
0.0025 at 1000 Deg C (cal/s-cm -Deg C) |
Less than 0.1 % |
3.2-3.4 g/cc |
6 |
10mm-4 |
8mm-3 |
8mm - 3 |
7mm - 3 |
6mm - 0 |
1mm - 1 |
3mm - 1 |
4mm - 0 |
4mm - 30 |
mesh |
#44 - mesh |
#60 - mesh |
#200 - mesh |
#300 - mesh |