Classifying – separating – and assorting solids – Special applications
Patent
1989-02-27
1990-07-24
Focarino, Margaret A.
Classifying, separating, and assorting solids
Special applications
51319, 51425, 209 12, 209 40, 2091271, B07B 1300, B24C 900
Patent
active
049433687
ABSTRACT:
An electrostatic waste separation process for abrasive blasting residues containing an abrasive media and a hazardous material such as lead-based paint. A preconditioning stage as well as a postconditioning stage is used in addition to the electrostatic separation step. Preferably the preconditioning stage consists of the following steps: (a) a size classification step; (b) a ferromagnetic separation step; and (c) a gravity separation step. The concentrated hazardous material separated by this process can then be packaged in a container which can be safely transported, stored or disposed of. The nonhazardous blasting media may be recycled and reused or disposed of as a nonhazardous material.
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Gilbert Stanley R.
Weyand Thomas E.
Focarino Margaret A.
Pittsburgh Mineral & Environmental Technology, Inc.
Wacyra Edward M.
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