Thermodynamic analysis of the carbothermic reduction of a high-phosphorus oolitic iron ore by FactSage

• Published in: International journal of minerals, metallurgy and materials Vol. 23; no. 10; pp. 1126 - 1132
• Main Authors: Yu, Wen, Tang, Qiong-yao, Chen, Jiang-an, Sun, Ti-chang
• Format: Journal Article
• Language: English
• Published: Beijing University of Science and Technology Beijing 01.10.2016; Springer Nature B.V; School of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China%School of Architectural and Surveying and Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China%School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
• Subjects: Aluminum oxide; analysis;oolitic; Carbothermic reactions; Ceramics; Characterization and Evaluation of Materials; Chemistry and Materials Science; Composites; Corrosion and Coatings; Fluorapatite; Glass; iron; Iron ores; Iron oxides; Materials Science; Metallic Materials; Natural Materials; ore;carbothermal; Phosphorus; reduction; Reduction (metal working); Silicon dioxide; Slag; Surfaces and Interfaces; Temperature effects; thermodynamic; Thermodynamics; Thin Films; Tribology; thermodynamic analysis; oolitic iron ore; carbothermal reduction
• ISSN: 1674-4799; 1869-103X
• DOI: 10.1007/s12613-016-1331-z

A thermodynamic analysis of the carbothermic reduction of high-phosphorus oolitic iron ore（HPOIO） was conducted by the Fact Sage thermochemical software. The effects of temperature, C/O ratio, additive types, and dosages both on the reduction of fluorapatite and the formation of liquid slag were studied. The results show that the minimum thermodynamic reduction temperature of fluorapatite by carbon decreases to about 850°C, which is mainly ascribed to the presence of SiO2, Al2O3, and Fe. The reduction rate of fluorapatite increases and the amount of liquid slag decreases with the rise of C/O ratio. The reduction of fluorapatite is hindered by the addition of CaO and Na2CO3, thereby allowing the selective reduction of iron oxides upon controlled C/O ratio. The thermodynamic results obtain in the present work are in good agreement with the experimental results available in the literatures.