General Description of Gilsonite Specification
Gilsonite specification help user to make it in granular powder form. Its particle size varies between 4- and 200-mesh. Pulverized Gilsonite is commonly used to control lost circulation.
Gilsonite is very fragile. It shatters easily. Rolling the Gilsonite between two drums tends to give the best particle distribution to use as raw material in carbon production. The low specific gravity of Gilsonite powder helps improve its ability to control lost circulation.However, this feature can also cause the additive to separate to the top of thin slurries and slurries containing dispersants.
for each usage we must do some refining on Gilsonite and so its specification will change.
General Specification
Physical Specification :
| Color in | Mass Black |
|---|---|
| Color in Streak or | Powder Brown – Dark Brown |
| Moisture Content | 0.5–1 |
| Specific Gravity @ 77°F | 1.04-1.06 |
| Hardness (Moh’s Scale) | 2 |
| Penetration | 0 |
Volatility, Weight %, :
| 5 Hours @ 325°F< | 2% |
|---|---|
| 5 Hours @ 400°F< | 4% |
| 5 Hours @ 500°F< | 5% |
| Acid Value | 2.3 |
| Saponification Value | 5.6 |
| Iodine Number | 0 |
| Heat of Combustion | 17,900 Btu / lb. |
| Heat of Fusion | 9990 Btu / lb. |
| Specific Heat of Solid Phase | 0.52 Btu / lb. / °F |
| Specific Heat of Liquid Phase | 0.61 Btu / lb. / °F |
| Glass Transition Temperature, Tg | 185-225 °F |
| Bulk Density, Lump | 40 lbs. / ft3 |
| Electrical Resistivity | 4.0 x 1012 ohm-cm |
Viscosity, Brookfield :
| @ 375°F | 55,000 cps |
|---|---|
| @ 400°F | 22,800 cps |
| @ 425°F | 6,600 cps |
| @ 450°F | 2,800 cps |
Specification of Gilsonite in Chemical
| Moisture (AGC Method) | 0.5-1% |
|---|---|
| Penetration (25 C, 100 gm, 5 sec.) | 0 |
| Color in Mass | Black |
| Sulfur | 3-3.3% |
| Specific Gravity | 1.05 |
| Fixed Carbon | 15% |
| BTU per pound | 16,000-18,000 |
| Volatile Combustible Matter at 1900 F, ASTM | D271-475-81% |
| Lustrous Carbon Content | 25-35% |
| Coking Value | 20-25% |
