| 1 | Investigation on Co-Combustion Kinetics of Anthracite and Waste Plastics by Thermogravimetric Analysis显示文摘In order to effectively recycle resource for the benefit of the global environment, the utilization of waste plastics as auxiliary injectant for blast furnaces is becoming increasingly important. Combustion kinetics of plastics-coal blends with 0, 10%, 20% and 40% waste plastics (WP) are investigated separately by thermogravimetric analysis (TGA) from ambient temperature to 900 ℃ in air atmosphere. These blends are combusted at the heating rates of 5, 10 and 20 ℃/min. The results indicate that, with the increase of waste plastics content, the combustion processes of blends could be divided into one stage, two stages and three stages. The waste plastics content and heating rates have important effects on the main combustion processes of blends. With the increase of waste plastics content, the ignition temperature and the final combustion temperature of blends tend to decrease, while the combustion reaction becomes fiercer. With the increase of the heating rate, the ignition temperature, the mass loss rate of the peaks and the final combustion temperature of blends combustion tend to increase. The Flynn-Wall-Ozawa (FWO) iso-conversional method is used for the kinetic analysis of the main combustion process. The results indicate that, when the waste plastics content varied from 0 to 40%, the values of activation energy increase from 126.05 to 184.12 kJ /mol. | LIU Zheng-jian, REN Shan, ZHANG Jian-liang, LIU Wei-jian, XING Xiang-dong, SU Bu-xin (State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China) | 2012 | Journal of Iron and Steel Research(International)2012，19，10： | 5 |
| 2 | Combustion Ratio of Waste Tire Particle, PC and Mixture at Blast Temperature of BF显示文摘In order to study the combustion characteristics of waste tire particle (WTP), pulverized coal (PC) and their mixture, the contents of CO, CO2 and O2 of off-gas during the combustion of WTP, PC and mixture under the condition of rich oxygen by 0-4% in blast and at 1 250 ℃ were measured simultaneously using synthetically infrared analyzer, and then the corresponding combustion ratio was calculated and compared. The results showed that the burning rate of WTP reached approximately 57%, which is much higher than that of PC (only about 18%) in the initial 650 s in fresh air, and then the increase of combustion rate of PC is faster than that of WTP; the combustion rate of PC improved remarkably with the addition of WTP. Meanwhile, the combustion rates of all these materials improved with the increase of oxygen content. | ZHANG Jian-liang REN Shan SU Bu-xin LIN Yin-he LONG Shi-gang | 2012 | Journal of Iron and Steel Research(International)2012，19，2： | 4 |
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