Blast Abrasives copper slag grit(Iron Silicate) - COARSE 
Blast Abrasives copper slag grit is a by-product produced during smelting of copper which is then processed in to abrasive products.Typically it is composed of ferrosilicate material and oxides formed when the molten slag is quenched in cold water.This cooling process fractures the slag into coarse,angular particles making it an ideal choice in many applications.
Blast Abrasives is a low cost expendable abrasive suited for open blast cleaning and due to its low silica content does not pose the health hazards created by silica sand.It's sharp,hard particles can provide a fast cleaning action and excellent surface profile.
| Chemical Analysis | |
|---|---|
| Constituent | %weight |
| Silica SiO2(combined silicate) | 26-30% |
| Free silica | <0.5% |
| Alumina,Al2O3 | 1-3% |
| Iron oxide as FeO | 42-48% |
| Calcium oxide CaO | 1-2% |
| magnesium oxide MgO | 0.8-1.5% |
| Copper oxide CuO | 0.60%-0.70% |
| Sulphates | 0.0008%-0.001% |
| Chlorides | 0.001%-0.002% |
| Physical properties | |
|---|---|
| property | typical value |
| Color | Black,glassy |
| Grain Shape | Angular,multifaceted |
| Grain Dimension | 0.2 - 2.4 mm |
| Hardness | 6-7 moh |
| Specific gravity | 3.51 |
| Bulk density | 1.87 tonnes/m3 |
| pH | 7.0 |
| Conductivity | 4.8 mS/m |
| Weight raise on ignition | 4% |
| moisture content | <0.1% |
