Concrete Grinder Recovery Vacuum . Recommend A Vacuum For Concrete Dust Removal? - Tools . · Im grinding a slab on grade that has many bumps in it and im using a Hilti DG150 grinder hooked up to a ridgid shop vac and the vacuum cant keep up with the dust removal and shoots the dust out the vacuums exhaust..Im using the dust filter with a bag and still having this problem.