New Method of Direct Reduction on Iron Concentrate Oxidized Pellets by Microwave Heating
HU Bing1, HUANG Zhu-cheng1, JIANG Tao1, PENG Hu2
（1. School of Mineral Processing and Bioengineering, Central South University, Changsha 410083, Hunan, China 2. Changsha SYNOTHERM Co., Ltd., Changsha 410013, Hunan, China
Abstract：Traditional heating for direct reduction had a low thermal efficiency and “cold center”, even the large amount of waste heat and gas emissions, which made the long time, high energy consumption and heavy pollution for reduction of oxidized pellets. The major advantages of using microwaves in the experiment were rapid heat transfer, volumetric and selective heating and pollution-free environment, in addition, iron concentrate oxidized pellets and anthracite had a strong microwave absorbency, on the basis, a new coal based direct reduction technology on iron concentrate oxidized pellets was developed in microwave shaft furnace. The results show that iron concentrate oxidized pellets coal based direct reduction by microwave heating in 1050℃ at 65min, can obtain 95.25% the metallization rate, and has 1718.88N/a compressive strength. Compared with conventional heating, the time of microwave heating reduction roasting can shorten 27.78%, and compressive strength nearly doubled increase, even has little waste heat and gas emission.
收稿日期: 2011-03-09
出版日期: 2012-01-16
引用本文:
胡兵，黄柱成，姜涛，彭虎. 铁精矿氧化球团微波加热直接还原新方法[J]. 钢铁, 2012, 47(1): 14-18.
HU Bing1, HUANG Zhu-cheng1, JIANG Tao1, PENG Hu2. New Method of Direct Reduction on Iron Concentrate Oxidized Pellets by Microwave Heating. Iron and Steel, 2012, 47(1): 14-18.
2012, Vol. 47 
