TY - GEN
T1 - Thermodynamics and phase transformation analysis on selective sulphidation of limonitic nickel ores mixed with carbon additives
AU - Abidin, Faizinal
AU - Harjanto, Sri
AU - Permatasari, Nur Vita
AU - Ikhwani, Nur
N1 - Funding Information:
Authors would like to thank the Directorate of Research and Public Engagement, Universitas Indonesia for funding this research under PITTA Project 2019 under contract No. NKB-0788/UN2.R3.1/HKP.05.00/2019.
Publisher Copyright:
© 2020 Author(s).
PY - 2020/9/3
Y1 - 2020/9/3
N2 - Previous studies assume that carbon addition at selective sulphidation of laterite nickel ores facilitate the sulphidation of nickel and cobalt in the ores. The presence of carbon in the selective sulphidation of limonitic nickel ores using sulphur was analyzed by thermodynamics and phase transformation. Limonite nickel ores were mixed with 5% sulfur and 4% lignite coal and were formed with pelletizer, roasted at 1000°C for 1 hour (heating rate 10°C/min). Cooled in the furnace by flowed N2 gas. Thermal characteristics of nickel ores pellets show that a number of reactions take place during the heating process at temperatures of 80°C, 280°C, 480°C, 680°C and 960°C. The five reactions are endothermic reactions which are characterized by a decrease in heat flow (μV) on the DSC analysis curve and weight losses on the TGA analysis curve. Addition of 5% sulfur resulted in lower dehydroxylation reaction temperature around 20°C compared to fresh ore. The presence of carbon obtained from the addition of lignite coal resulted in sulphidation reaction did not occurs. Phases formed after roasted are magnetite (Fe3O4) and olivine [(Fe, Mg)2SiO4]. Monosulphide Solid Solution includes troilite (FeS) and marcasite (FeS2) formed in limonite nickel ores mixed with only 5% sulphur without carbon additive when heated at 600°C.
AB - Previous studies assume that carbon addition at selective sulphidation of laterite nickel ores facilitate the sulphidation of nickel and cobalt in the ores. The presence of carbon in the selective sulphidation of limonitic nickel ores using sulphur was analyzed by thermodynamics and phase transformation. Limonite nickel ores were mixed with 5% sulfur and 4% lignite coal and were formed with pelletizer, roasted at 1000°C for 1 hour (heating rate 10°C/min). Cooled in the furnace by flowed N2 gas. Thermal characteristics of nickel ores pellets show that a number of reactions take place during the heating process at temperatures of 80°C, 280°C, 480°C, 680°C and 960°C. The five reactions are endothermic reactions which are characterized by a decrease in heat flow (μV) on the DSC analysis curve and weight losses on the TGA analysis curve. Addition of 5% sulfur resulted in lower dehydroxylation reaction temperature around 20°C compared to fresh ore. The presence of carbon obtained from the addition of lignite coal resulted in sulphidation reaction did not occurs. Phases formed after roasted are magnetite (Fe3O4) and olivine [(Fe, Mg)2SiO4]. Monosulphide Solid Solution includes troilite (FeS) and marcasite (FeS2) formed in limonite nickel ores mixed with only 5% sulphur without carbon additive when heated at 600°C.
UR - http://www.scopus.com/inward/record.url?scp=85092031378&partnerID=8YFLogxK
U2 - 10.1063/5.0013579
DO - 10.1063/5.0013579
M3 - Conference contribution
AN - SCOPUS:85092031378
T3 - AIP Conference Proceedings
BT - 4th International Tropical Renewable Energy Conference, i-TREC 2019
A2 - Kusrini, Eny
A2 - Nugraha, I. Gde Dharma
PB - American Institute of Physics Inc.
T2 - 4th International Tropical Renewable Energy Conference 2019, i-TREC 2019
Y2 - 14 August 2019 through 16 August 2019
ER -