Suriyanto Bakri, Mubdiana Arifin, Aldi Suryadi, Arif Nurwaskito, Firdaus. Effect of Drum Rotation Speed on Magnetic Separation Efficiency for Iron Grade Improvement of Galesong Beach Iron Sand Takalar Regency. CIEJ. 2025;1(2):77-83. doi:10.63288/ciej.v1i2.9