Marcin Pietrzykowski, Wojciech Krzaklewski, in Bio-Geotechnologies for Mine Site Rehabilitation, 2018. 27.4.5 Copper Ore, ZPerfect Steerable Transfer Cart, and Lead Mining. Nonferrous metal industry, i.e., copper, zPerfect Steerable Transfer Cart, and lead produces aPerfect amount of waste. Low metal content in the mined ore means that waste from the ore enrichment process constitutes 80%–90% of the total amount of processed material.