Temperature Rise Characteristics of Carbon-Containing Chromite Ore Fines in Microwave Field

• Published in: Journal of iron and steel research, international Vol. 15; no. 1; pp. 1 - 5
• Main Authors: LI, Ning, CHEN, Jin, YAN, Hong, FENG, Xiu-mei, CUI, Hui-jun, LIU, Jin-ying
• Format: Journal Article
• Language: English
• Published: Singapore Elsevier Ltd 2008; Springer Singapore; College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China%No.12 Research Institute, China Electronics Technology Group Corporation, Beijing 100016, China
• Subjects: Applied and Technical Physics; carbon-containing chromite ore fine; carbon-containing magnetite ore fine; Engineering; Machines; Manufacturing; Materials Engineering; Materials Science; Metallic Materials; microwave field; Physical Chemistry; Processes; temperature rise characteristics; 冶金技术; 磁铁矿; 铬铁矿; carbon-containing magnetite ore fine; carbon-containing chromite ore fine; temperature rise characteristics; microwave field
• ISSN: 1006-706X; 2210-3988
• DOI: 10.1016/S1006-706X(08)60001-1

To avoid the nonuniform phenomena of heat and mass transfer of metallurgical powdery materials caused by conventional heating method,the temperature rise characteristics of carbon-containing chromite ore fines in the microwave field were investigated using microwave heating in a microwave metallurgical furnace.The experimental results show that the carbon-containing chromite ore fines have better temperature rise characteristics in the microwave field at a frequency of 2.45 GHz.After heated in the microwave field of 10 kW,the temperature of 1 kg carbon-containing chromite ore fines rose up to 1 100 ℃ in 7 min,at a temperature rise rate of 157.1（℃·min-1·kg-1）,whereas the temperature of 1 kg carbon-containing magnetite ore fines rose only up to 1 000 ℃ in 10 min,at a temperature rise rate of 100（℃·min-1·kg-1）.With increasing carbon-fitting ratios and by adding calcic lime,their heating effects changed regularly.