Abrasives

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Blasting media are the auxiliary materials used in blasting (including sandblasting and shot blasting ).

Synthetic plastic abrasive

Shot , gravel , steel shot, glass balls or wire sections made of chilled cast iron, cast steel or steel are used as blasting media . According to BGR 500 (formerly VBG 48) "blasting work", the use of quartz sand as a blasting agent is not permitted, as the fine sand dust that is produced can cause silicosis . Both spherical and angular material are used as blasting media. Metallic and mineral substances are very common for blasting media , while synthetic or vegetable substances are rarely used. With the mineral and synthetic abrasives, individual grains almost always have a polygonal shape with sharp edges. Ceramic and glass beads are an exception with their spherical shape. The mineral blasting agents include ceramic and glass beads, garnet sand and all types of corundum (aluminum oxide Al 2 O 3 ). The synthetic blasting abrasives include plastics , the vegetable blasting abrasives nutshells, apple pits or cork . The grains of the metallic blasting media can be spherical (also known as shot or shot), cylindrical (wire grain) or angular or angular (also called grit or gravel).

Dry ice (CO 2 ) in the form of pellets has recently become more and more important . Dry ice blasting has the advantage that it is not abrasive and sublimates into gas without leaving any residue, so that only the dirt removed has to be disposed of. For this reason, it is often used as an active medium in cleaning in the industrial sector.

literature

  • Waldemar Gesell: Replacement of quartz sand as an abrasive. West German publishing house, Cologne Opladen 1960.
  • Max Vater: Contribution to testing metallic abrasives. Springer Fachmedien GmbH, Wiesbaden 1965.
  • Waldemar Gesell: Regarding questions about blasting media testing. Springer Fachmedien GmbH, Wiesbaden 1961.

See also

Web links