LUSTROUS CARBON : High-Purity Carbon Additive For Foundries
Lustrous carbon, derived from specially processed coal dust, is a refined carbon material widely used in the foundry industry. At Jindal Trading Co., we supply high-quality lustrous carbon used for precision casting and improving mold surface finish. Explore its composition, grades, and industrial applications below.
What is Lustrous Carbon?
Lustrous carbon is a carbon-rich residue formed by the thermal decomposition of volatile additives in molding sand at high temperatures. It coats the sand grains during casting, providing a smooth, non-metallic finish on cast surfaces.
How is it produced:
It is manufactured from specially selected low-ash coal or carbon materials, processed under
controlled conditions to produce uniform, fine carbon particles with high surface activity.
Classifications of Lustrous Carbon
Lustrous carbon can be classified based on carbon content, particle size, and application:
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By Carbon Content:
- High-Carbon Grade: >95% carbon, used in steel and precision castings.
- Medium-Carbon Grade: 80–90% carbon, used in general-purpose foundry applications.
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By Particle Size:
- Micronized: Fine particles for easy mixing in sand systems.
- Granular: Slightly coarser for slower decomposition and longer-lasting effect.
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By Use Case:
- Green Sand Casting: Reduces metal penetration and improves casting finish.
- Precision Foundry Work: Ensures uniform carbon coating and dimensional accuracy.
Use Of Lustrous Carbon In Different Sectors
| Sector | Type/Grade | Use |
|---|---|---|
| Foundry (Automotive) | High-Carbon Micronized | Improves casting surface finish and reduces defects. |
| Engineering Castings | Medium Grade Granular | Used in general-purpose molding sands for steel and iron parts. |
| Heavy Machinery | High-Carbon Granular | Enhances dimensional stability of large castings. |
| Automotive Parts | Micronized Lustrous Carbon | Ensures smooth mold finish for precision engine parts. |
| Steel Casting | Low-Ash Carbon | Prevents sand fusion and reduces need for post-processing. |
Major Producers of Lustrous Carbon in India
End Products of Lustrous Carbon
Lustrous carbon can be used to improve or create several key products in foundry operations:
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Improved Cast Surface
- Effect: Prevents metal penetration into sand grains.
- Description: Produces smoother surfaces requiring less machining.
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Reduced Casting Defects
- Effect: Forms a carbonaceous layer between sand and metal.
- Description: Minimizes gas defects and sand burn-on.
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Enhanced Reusability
- Effect: Lowers binder consumption in green sand systems.
- Description: Improves efficiency and cost savings in sand reclamation.
Lustrous Carbon at Jindal Trading Co.
At Jindal Trading Co., we supply premium-grade lustrous carbon with the following characteristics: Volatile Matter between 40–50%, Ash Content around 7%, and Fixed Carbon by difference (approx. 43–53%). Our product ensures excellent mold finish, reduced casting defects, and optimal performance in green sand systems. Custom sizing and packaging options are available on request.