US Minerals Black Diamond Coal Slag Abrasive

Sku: P-SLCA

Black Diamond Coal Slag is distributed by BlastOne throughout the United States. Comes in 4 main grades – Extra Coarse (10/40), Coarse (12/40), Medium (20/40), Fine (30/60). US Minerals/Black Diamond/Black Magnum Slag sizing is different from other Slags so double-check that you are specifying the correct size to achieve your desired profile. 

Extra Coarse 10/40 Black Diamond 

This is a specialty grade that is designed for use when you need an extra large surface profile, This is the coarsest slag particle grading available from US Minerals. You can expect to achieve around a 3-5mil profile 

Coarse 12/40 Black Diamond Your general purpose maintenance blasting grade for removal of rust and existing coatings. US Minerals recommends using a 5/16″ blast nozzle or larger, you can expect to achieve a 3.5-4.5mil profile. 

Medium 20/40 Black Diamond Typical grade used for mild steel milscale removal, for blasting new tanks, and structural steel. Recommended blast nozzle size is a 1/4″ or larger, you should achieve a 2-3.5mil profile 

Fine 30/60 Black Diamond Use for whip-blasting or blasting easy-to-remove milscale. A 1-2.5mil profile can be expected.

 SPECIFICATIONS

• Grades: 10/40, 12/40, 20/40, 30/60, Extra-Coarse, Coarse, Medium, Fine
• Packing Types: 4000lb and 2000lb Bulk bags, 100lb, 50lb paper bags. Packaging types vary by plant
• Blasting Speed: 50 - 150 ft²/hr
• Dust factor: High
• Recyclability: 1/10
• Consumption rate: 5-12 lb/ft²

APPLICATIONS

• Primarily used for the surface preparation of steel and concrete surfaces.
• Used for general-purpose repair and maintenance blasting of coated steel surfaces
• Produces a moderate profile
• Used for a near-white blast through medium to heavy coatings, heavy rust, and heavy mill scale

BENEFITS

• Low cost
• Versatile in a wide variety of applications
• Plentiful supplies

CONCERNS

• Non-recyclable
• High dust
• Embedment into surfaces

Coal slag is a glass matrix alumina-silicate that is produced as a by-product of coal-burning power plants. As it burns, the residual ash becomes molten. When this slag is cooled, it vitrifies into a glassy, abrasive material, which is then crushed to produce blast media.