Upgrading graphite quality from Chenjere-Ruangwa ore through froth flotation techniques . East African Journal of Science, Technology and Innovation, [S. l.], v. 6, n. 1, 2025. DOI: 10.37425/f7xk3f60. Disponível em: https://www.eajsti.org/index.php/EAJSTI/article/view/1459. Acesso em: 29 jun. 2025.