Study on Unreacted Nuclear Model of Iron Oxide Pellet Reduction

Abstract:

For the unreacted nuclear model, predecessors have established a more complete theoretical model under the assumption of steady-state conditions. And deduced the general equation of the rate of reduction of pellets. In this paper, we focus on the model of iron ore pellet reduction, not only establishing a single-interface unreacted nuclear model but also establishing a three-interface unreacted nuclear model. The activation energy and diffusion coefficient of iron ore reaction under certain conditions are obtained. According to the fitted images, the speed limit factors in the iron ore pellet reaction model are analyzed completely. In this paper, a pellet decomposition model was established to try to determine the kinetic and thermodynamic parameters of the pellet reaction without the need for experimentation, to simulate the reduction of pellets, and to determine the process of limiting the reaction rate and the process Strengthen.

• Periodical: Materials Science Forum (Volume 980)
• Pages: 404-409
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.980.404
• Online since: March 2020
• Authors: Jing Yi Zhu, Xiao Lei Zhou*, Ning Bin Liu
• Keywords: Gas-Solid Two-Phase, Iron Oxide, Pellet, Reduction, Unreacted Nuclear Model

References

[1] Study on the process and mechanism of Li Jian's composite binder magnetite pellet direct reduction [D]. Changsha: Central South University, (2006).

[2] Zhou H. Research on mechanism of direct reduction of iron-concentrated cold-consolidated pellets [D]. Changsha: Central South University of Technology, (1998).

[3] Yang Tianjun, Huang Dianbing, Kong Lingtan. Melt reduction [M]. Beijing: Metallurgical Industry Press, (1998).

[4] Yi Ke. The proportion of blast furnace pellets used at home and abroad [J]. Sintering pellets, 33(4): 53.

[5] Xu Yudi, Hong Xin. Several issues in the review and development of electric furnace short flow [J]. Chinese Metallurgy, 2005, 15(7): 1-8.

[6] Liu Guogen, Wang Dianzuo, Qiu Guanzhou. Current status and development of direct reduction at home and abroad [J]. Comprehensive Utilization of Mineral Resources, 2001, 5: 20-24.

[7] Shi Zhanqi. New Development of Direct Reduction Technology [J]. Chinese Metallurgy, 2002, 12(3): 15-18.

[8] Chen Yongguo, Guo Senkui, He Xiangyi. Status and Development of Direct Iron Reduction Technology[J]. SHANGHAI Metal, 1999, 21(4): 40-42.

[9] Feng Yanbo, Cao Weicheng, Yang Shuangping. Development Status and Prospects of Direct Reduction Technology in China [J]. Chinese Metallurgy, 2006, 16(5): 10-13.

[10] DUAN Dongping, WAN Tianjun, REN Daning. Study on New Technology for Direct Coal-based Reduction of Common Grade Iron Ore[J]. , 2001, 36(8): 7-11.

[11] Zhang Hanquan, Zhu Deqing. Status Quo and Development of Direct Reduction[J]. Iron and Steel Research, 2002, 2: 51-54.

[12] Wei Guo, Zhao Qingjie, Dong Wenxue. Overview and development of direct reduced iron production [J]. Chinese Metallurgy, 2004, 14(9): 16-20.

[13] Fan Xiaohui, Qiu Guanzhou, Jiang Tao. Current Status and Development Prospect of Direct Reduction Iron Production in China[J]. Ironmaking, 2002, 21(3): 53-55.

[14] Qin Minsheng. Non-blast furnace ironmaking [M]. Beijing: Metallurgical Industry Press, (1988).

[15] Ye Yiwu. A review of the blast furnace charge structure in the EU and the progress of pellet production in China [J]. Sintering Pellet. 2004, 29(4): 4-7.

[16] Xu Moliang. Discussion on reasonable charge structure of blast furnace in China[J]. , 2004, 23(4): 25-26.

[17] Zhou Qubo. Direction of structural adjustment of iron ore products in China [J]. Metal Mines. 2001, 8: 1-4.