Foundry
Foundry Gilsonite: Frequently Asked Questions
How much gilsonite replaces sea coal? Usually less gilsonite is needed than sea coal because of its higher…
Gilsonite for Foundry Sand
Foundry grade gilsonite for green sand: lustrous carbon, dosage, sea coal replacement and defect control.
Foundry
Gilsonite in Non-Ferrous Castings
Aluminium, copper and brass castings are poured at lower temperatures than iron, so less carbon additive is needed.…
Foundry
Can Gilsonite Be Used for Steel Castings?
Steel castings present different challenges from iron. Pouring temperatures are higher and carbon pick-up can be a concern.
Foundry
Gilsonite in Grey Iron Foundries
Grey iron castings — engine blocks, brake discs, pump housings — are produced in large volumes in green…
Foundry
Gilsonite for Ductile Iron Castings
Ductile (nodular) iron castings are used in automotive, pipe and machinery parts. They need clean surfaces and controlled…
Foundry
Storing and Handling Gilsonite in the Foundry
Good storage keeps gilsonite free-flowing and safe. Jumbo bags can be discharged into silos for automatic dosing. Keep…
Foundry
Foundry Emissions and Carbon Additives
Foundries are under pressure to reduce smoke, odour and emissions. The choice of carbon additive matters. When hot…
Foundry
Gilsonite and Common Casting Defects
Carbon additives affect several casting defects. Getting the level right is key. Monitor LOI, volatile content and casting…
Foundry
Choosing Foundry Gilsonite Grades
Foundry gilsonite is offered in several particle sizes. Each suits a different need. For precision castings and fine…
Foundry
Bentonite and Gilsonite Blends for Green Sand
Many foundries buy pre-mixed blends of bentonite and carbon additives. Gilsonite is an excellent carbon component for these…
Foundry
Gilsonite in Core Sand and Mould Coatings
Besides green sand, gilsonite is used in some core sands and refractory coatings. Small additions of gilsonite to…
Foundry
Reducing Burn-On and Metal Penetration with Gilsonite
Burn-on and metal penetration create rough casting surfaces that need costly grinding and shot blasting. Gilsonite releases hydrocarbons…
Recommended product
Data sheet
Foundry Grade Gilsonite
| Property | Typical value | Test method |
|---|---|---|
| Appearance | Black powder | Visual |
| Particle size | 100 – 300 mesh | Sieve |
| Volatile matter | 55 – 75 % | ASTM D3175 |
| Ash content, max | 5 % | ASTM D3174 |
| Moisture, max | 1 % | ASTM D95 |
| Softening point (R&B) | 150 – 200 °C | ASTM D36 |
| Typical dosage | 0.3 – 1.0 % (iron) | |
| Packing | 25 kg bags palletized; 1 MT jumbo bags for blending plants. | |
Typical values. The final specification is confirmed in the COA of each shipment.