Cemented paste backfill for mineral tailings management
nbsp 0183 32 Since the Stone Age more than 1150 million tons of heavy metals Cd Co Cr Cu Pb and Zn have been produced Sheoran and Sheoran 2006 generating a considerable amount of mine tailings It is estimated that the production rate of mine tailings ranges between 5 and 7 billion tonnes per year worldwide Edraki et al 2014