Abstract:A bauxita do Pará é constituída pelas seguintes camadas: nodular (BN), nodular cristalizada (BNC), cristalizada (BC), cristalizada -amorfa (BCBA) e amorfa (BA). Deste perfil geológico, somente a camada BC é lavrada, beneficiada, transportada através de mineroduto e purificada no processo Bayer. As camadas BCBA e BA possuem um elevado teor de SiO 2 reativa (6-7%), o que inviabiliza sua utilização no processo.Uma proposta para dobrar as reservas de bauxita, de acordo com o parâmetro comercial, depende de um estu… Show more
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