Copper Slag

Copper slag is the most economical expendable abrasive for blasting purpose in areas where recovery and recycling is impractical. It is a by-product formed during the manufacture of copper while smelting and quenching process in copper smelter. The raw slag is processed and screed in various grades for blasting purpose. Sharp and hard cutting edges of particle size helps in fast cutting action and good surface profile. Due to its low silica content , it does not pose any health hazard and hence widely accepted for blasting. It is largely used in shipyards for removal of heavy corrosion and coatings giving a high quality surface profile. It is available is various grades depending on the particle size mix.

the advantages of copper slag extend beyond its technical performance. A pivotal facet that sets copper slag apart is its low silica content. This attribute directly contributes to the abrasive’s overall safety profile. With minimal silica content, its becomes an attractive choice for blasting operations where health hazards posed by airborne contaminants are a genuine concern. This feature has led to widespread acceptance and adoption of copper slag in various industries and sectors where blasting operations are a common practice.

In the maritime industry, particularly shipyards, its has etched a prominent role. It plays a crucial part in the removal of stubborn heavy corrosion and coatings that accumulate over time on vessel surfaces. The abrasive’s ability to efficiently tackle such challenges results in the attainment of high-quality surface profiles, a prerequisite for maritime maintenance and renovation.


Chemical Composition

Physical Characteristics

Free Silica

< 0.5 %

Specific Gravity at 25°C

3.5 Kg/m³

Silica SiO2




(combined as Silicate)

25-35 %


7 Moh

Alumina, Al2O3

2 - 9 %

Bulk Densityat 25°C

1.75 Ton/m³

Iron Oxide as FeO/Fe3O4

45 – 55 %




Magnesium Oxide, MgO


1 - 5 %


Grain Shape

Angular /


Copper Oxide, CuO

0.7 % Max


Less than 25ppm

Calcium Oxide, CaO

2 - 9 %


< 25 mS/m


0.02 %

Solubility in water

Non Soluble


0.003 %


Black, Glassy


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