Know-how since 1863James Durrans Group
Core Sand Additives
These are high quality, coarse grained carbons which are ideally suited in iron foundries as a sand additive in cold box bonded cores to alleviate the effects of veining.
Product |
Ash % |
Volatile % |
Moisture % |
Lustrous carbon % |
Swell index % |
C % |
S % |
N % | Typical Particle Distribution % Retained | |||||
| 1.00 mm | 0.50 mm | 0.21 mm | 0.15 mm | 0.075 mm | ||||||||||
| 16 # | 30 # | 72 # | 100 # | 200 # | Pan | |||||||||
| BSS | BSS | BSS | BSS | BSS | ||||||||||
| 75 | 6 | 34 | 5.00 | 12 | 6.0 | 50 | 0.80 | 0.90 | 0 | 13 | 37 | 15 | 22 | 13 |
| 100 | 6 | 34 | 5.00 | 12 | 6.0 | 50 | 0.80 | 0.90 | 0 | 10 | 28 | 12 | 22 | 28 |
| 145 | 6 | 34 | 5.00 | 12 | 6.0 | 50 | 0.80 | 0.90 | 0 | 2 | 18 | 15 | 25 | 40 |
| 190 | 6 | 34 | 5.00 | 12 | 6.0 | 50 | 0.80 | 0.90 | 0 | 0 | 5 | 8 | 30 | 57 |
| 240 | 6 | 34 | 5.00 | 12 | 6.0 | 50 | 0.80 | 0.90 | 0 | 0 | 0 | 2 | 8 | 90 |
Benefits in use
- Helps improve dimensional stability and reduce burn on and expansion related problems
- Carefully sourced raw materials to stringent specifications providing consistent chemical analysis
- Effective prevention against the formation of veining
- Consistent burn-out rates and lustrous carbon formation
- Less contamination of the core box
- High dimensional stability of the Coldbox cores
- Consistent particle size distribution through advanced milling and screening techniques
- Low ash content helps to minimise the generation of inactive fines
- Low sulphur content - ideal for ductile iron casting
- High swell index with consistent thermal dilation