Study of the material composition to develop a rational technology for the enrichment of porphyry copper ores from the Yoshlik I and Kalmakyr depositsKholida Jumaeva, Mahmudjon Yakubov, Bakhrom Khamidullaev, Ibrokhim Nurmukhamedov and Feruz BadalovE3S Web Conf., 417 (2023) 01009DOI: https://doi.org/10.1051/e3sconf/202341701009