Blackblast (an aluminum silicate blast cleaning abrasive) is a blast cleaning abrasive made from coal slag from coal fired power plants. This abrasive is generally considered to be the safest of the non-recyclable industrial blasting media and is most commonly used for blasting coated or uncoated metal or concrete surfaces. Blackblast is commonly used as a blast media on painted steel bridges and for ship restoration projects.
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Advantages of Blackblast - Coal Slag
- Non-reactant – will not interfere with your coatings
- Easy cleanup
- No detectable crystalline silica
- No heavy metals
Available Sizes and Profiles:
| Size |
Profile |
Use |
| Utility #8-4 |
3.5 - 5.5 Mil |
For the tough blasting job |
| Medium #12-40 |
2.5 - 4.0 Mil |
For the tough blasting job |
| Medium Fine #20-40 |
2.0 - 3.5 Mil |
General blast cleaning |
| Fine #30-60 |
1.0 - 2.5 Mil |
General blast cleaning on delicate substrates when a smooth finish is required |
| Extra Fine #50-150 |
0.5 - 1.5 Mil |
When a very smooth finish is required |
Technical Specifications
| Symbol |
Name |
Percentage |
| SiO2 |
(Silicon Dioxide, Total) |
46.5% |
| Al2O2 |
(Aluminum Oxide) |
22.5% |
| Fe2O3 |
(Iron Oxide) |
19.0% |
| CaO |
(Calcium Oxide) |
5.5% |
| LOI |
(Loss on Ignition) |
3.0% |
| MgO |
(Magnesium Oxide) |
1.0% |
| K2O |
(Potassium Oxide) |
1.0% |
| TiO2 |
(Titanium Oxide) |
1.0% |
| SiO2 |
(Crystalline Silica) |
< 1.0% |
Characteristics
| Colour: |
Black |
| Bulk Density: |
90 lbs/ft3 |
| Grain Shape: |
Angular |
| Solubility: |
Insoluble |
| Hardness: |
> 7 Mohs (see our hardness index) |
Packaging:
- 55 lb paper bags, 56 bags/ pallet
- 3000 lb Super Sacs
- Bulk (blower truck or rail hopper cars)
Order today
Opta Minerals Inc., Waterdown, ON
