Possibilities for improving the technology of roasting zinc concentrates Jonibek Ismailov, Bahriddin Berdiyarov, Sardor Nosirkhujayev, Kakhramon Ochildiyev and Oybek Nuraliyev E3S Web of Conf., 525 (2024) 04003 Published online: 20 May 2024 DOI: 10.1051/e3sconf/202452504003