Use of electroplating sludge for ceramic brick manufacture

The migration of heavy metal ions (Zn 2+ , Cu 2+ , Cr 3+ , Cr 6+ , Ni 2+ , Fe 2+ and Fe 3+ ) from ceramic brick containing sludge from electroplating is investigated. The laws of migration of chemical elements under the action of different factors (temperature and time of exposure, pH of model medium) in relation to the batch and chemical composition of the bodies as well as the structure and phase composition of the materials are established. The optimal content of sludge in the bodies for obtaining ceramic brick, completely satisfying the regulatory requirements regarding the migration of chemical elements, is determined.