Copper slag or Ebonygrit is an abrasive blasting grit made of granulated slag from metal smelting processes (also called iron silicate). Copper slag abrasive is suitable for blast cleaning of steel and stone/concrete surfaces, removal of mill scale, rust, old paint, dirt etc. Ebonygrit is a disposable high-density blasting slag made from a by-product of copper production. Ebonygrit distinguishes from light-weight blasting slag, due to its high density property. Typically, the majority of its composition is iron oxide and silicon dioxide, formed when molten slag is quenched in cold water.
Physical state at 20°C and 101.3 kPa: Solid,
Colour:Black , Reddish brown, Grey, Dark grey
Melting point: 1027-1341ºC
Vapour pressure: Not applicable
Density: 3.11-4.2 g/m³
Water solubility: Poorly soluble* Solubilization and agitation for 14 days (pH 6.3- 7.6) resulted in dissolved Cu, Ni, Pb <0.2 mg/l
Flammability / Explosive : Non flammable / Non explosive
Oxidising properties: Non oxidizing
Granulometry: 741-2426 μm.
Chemical Properties :
Iron : 35%
SiO2 : 35%
Al2O3 : 4.3%
CaO : 3.5%
MgO : 1.1%
Uses: Blasting media, production of copper slag, manufacture of slag construction material, manufacture of abrasive agent, use of slag for construction (road, embankment, land construction), use of slag for stabilization of mining and quarries, use of slag as abrasive agent. It is used in sand blasting and marine.