Copper slag
Encyclopedia
Copper slag is an abrasive blasting
Abrasive blasting
Abrasive blasting is the operation of forcibly propelling a stream of abrasive material against a surface under high pressure to smooth a rough surface, roughen a smooth surface, shape a surface, or remove surface contaminants. A pressurized fluid, typically air, or a centrifugal wheel is used to...

 grit made of granulated slag
Slag
Slag is a partially vitreous by-product of smelting ore to separate the metal fraction from the unwanted fraction. It can usually be considered to be a mixture of metal oxides and silicon dioxide. However, slags can contain metal sulfides and metal atoms in the elemental form...

 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
Mill scale
Mill scale, often shortened to just scale, is the flaky surface of hot rolled steel, iron oxides consisting of Iron oxide, hematite, and magnetite....

, rust, old paint, dirt etc. Suitable for SA-3, SA-2½ and SA-2.

Copper slag blasting edia/grit - is manufactured of the granulated slag of copper
Copper
Copper is a chemical element with the symbol Cu and atomic number 29. It is a ductile metal with very high thermal and electrical conductivity. Pure copper is soft and malleable; an exposed surface has a reddish-orange tarnish...

 refineries, and used for blast-cleaning of metal surface. In different industries it is called different names - abrasive powder, grit, copper slag grit, mineral grit, grinding grains, etc. - but its main use is still for surface blast-cleaning. Internationally the described media is manufactured in compliance with ISO 11126-3

Blasting the grit at the surface is the most advanced approach for metal surface cleaning before paint spraying. The blasting media manufactured from copper slag brings less harm to people and environment then sand. The product meets the most rigid health and ecological standards.

Copper slag can also be used as a building material, formed into blocks. Such use was common in areas where smelting was done, including St Helens
St Helens, Merseyside
St Helens is a large town in Merseyside, England. It is the largest settlement and administrative centre of the Metropolitan Borough of St Helens with a population of just over 100,000, part of an urban area with a total population of 176,843 at the time of the 2001 Census...

 and Cornwall
Cornwall
Cornwall is a unitary authority and ceremonial county of England, within the United Kingdom. It is bordered to the north and west by the Celtic Sea, to the south by the English Channel, and to the east by the county of Devon, over the River Tamar. Cornwall has a population of , and covers an area of...

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