Re-using blasting grit
The used grit can be made suitable for reuse with a magnetic drum separator.
This separates the contaminants, such as paint residue and rust, from the magnetic abrasive.
Companies that blast steel and stainless steel also use these magnets.
They use such magnets to separate the steel blasting grit from the non-steel (e.g. ceramic) grit, making it reusable.
Remove undesired magnetism
However, the steel grit can become slightly magnetised and therefore clog the blasting nozzle.
Then a demagnetizer is used to remove the magnetism from the grit, preventing clumping of the blasting agent.
After the grit has fallen through the demagnetization tunnel, it is sucked back through a hose to the blasting equipment where it can be used again.
In a nutshell, then, use of a magnetic drum separator extends the life of the grit and ensures that users do not blast clean surfaces with dirty blasting agent.