Suharto Suharto, Fajar Nurjaman, Amru Daulay, Lukman Hakim Nasution, Slamet Sumardi, Andinnie Juniarsih, Andri Subekti, Suhartono Suhartono, Susanti Sundari, Feerzet Achmad, Diah Susanti, Erik Prasetyo, Fathan Bahfie
This study utilised a selective reduction method to generate ferronickel from limonitic ore, followed by a magnetic separation stage. The research explored the kinetics and the influence of time and temperature on nickel content and recovery. Sodium sulfate was incorporated as an additive, and carbon monoxide (CO) gas served as the reductant in a vertical tube furnace. Magnetic separation employed a permanent magnet set at 500 G. Reduction took place at temperatures of 900°C, 1000°C, and 1100°C, with varying durations from 30 min to 180 min. Optimal recovery and nickel grade were achieved at 1100°C for 180 min, reaching 70.07% and 8.49%, respectively. Increasing the reduction temperature and time correlated with enhanced recovery and nickel grade. © 2024 Canadian Institute of Mining, Metallurgy and Petroleum.
Research Center for Mining Technology, National Research and Innovation Agency, Lampung, Indonesia; Metallurgical Engineering, Faculty of Engineering, Sultan Ageng Tirtayasa University, Banten, Indonesia; Departement of Chemical Engineering, Universitas Jenderal Achmad Yani, Cimahi, Indonesia; Industrial Engineering Department, Universitas Tulang Bawang, Bandar Lampung, Indonesia; Chemical Engineering Department, Institut Teknologi Sumatera, Lampung, Indonesia; Metallurgical and Material Engineering Department, Faculty of Industrial Technology and Systems Engineering, Institut Teknologi Sepuluh Nopember, Surabaya, Indonesia; Department of Chemical Engineering, Norwegian University of Science and Technology, Trondheim, Norway