Науковий вісник НГУ

The parameters of burden flow from the bins of bell-less top charging system of blast furnaces

• 
• 

User Rating:  / 0

PoorBest 

Details

Category: Contens №3 2020

Last Updated on 13 September 2020

Published on 02 July 2020

Hits: 3807

Authors:

A. Selegej, Cand. Sc. (Tech.), Assoc. Prof., Senior Lecturer of the Applied Mechanics Department, orcid.org/0000-0003-3161-5270, National Metallurgical Academy of Ukraine, Dnipro, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

V. Ivaschenko, Dr. Sc. (Tech.), Prof., Vice Rector, orcid.org/0000-0001-5195-2552, National Metallurgical Academy of Ukraine, Dnipro, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

V. Chistyakov, Cand. Sc. (Tech.), Assoc. Prof., Dean of the Extra-Mural Faculty, orcid.org/0000-0003-4233-3797, National Metallurgical Academy of Ukraine, Dnipro, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

V. Golovko, Dr. Sc. (Tech.), Prof., Professor of the Department of Automation of Production Processes, orcid.org/0000-0001-5638-6991, National Metallurgical Academy of Ukraine, Dnipro, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu. 2020, (3): 41-46

https://doi.org/10.33271/nvngu/2020-3/041

повний текст / full article

Abstract:

Purpose. To prove the correspondence of the mathematical description regarding the process of the furnace charge material efflux out of the collecting bin of the bell-less top charging mechanism of a blast furnace as a result of the full-scale modeling of the studied process.

Methodology. Full-scale modeling of mechanical systems based on the Newton number is employed in the research study. Experimental investigation of the process of the burden efflux out of the collecting bin of the bell-less top charging mechanism of a blast furnace is fulfilled at the scale of 1 : 10.6. The correspondence of theoretically-calculated volumetric burden flow rate is tested and compared with the results of the full-scale modeling.

Findings. The volumetric flow rate of the burden is determined both experimentally and theoretically taking into account various degrees of opening sliding charge gate. It is found that the change in the opening angle of the sliding charge gate of the charging feeder bin model from to 1 radian results in the raise of the volumetric burden flow rate from 0 to 0.0014 m³/s while maintaining the free-dispersed nature of the flow. The integrated effect of granulometric furnace burden characteristics as well as geometric parameters of the bin delivery part on the volumetric furnace burden flow rate out of the bin is outlined. Empirical dependencies for model-sized sinter and coke consumption rates are developed. According to the results, the adequacy of the mathematical description regarding the process of the furnace charge material efflux out of the collecting bin of the bell-less top charging feeder in terms of the blast furnace is proven as a result of the full-scale modeling of the studied process.

Originality. First-ever, complex dependencies of the furnace charge flow rate on the opening angle of the sliding gate, the configuration of the delivery part of the bin, the size of the used furnace charge are established. Thus, the flow rate increases with the rise in the opening angle of the sliding gate, the reduction in the equivalent diameter (average size) of the particles of the furnace charge materials, the angle of the delivery part of the bin.

Practical value. The results can be used for determining the technological parameters of charging a modern blast furnace under various raw materials conditions. This will enable to make the furnace feeding system more automated, which will result in more efficient use of expensive furnace charge materials, reduction in power consumption and decrease in harmful impact on the environment. Recommendations regarding the selection of sizes for both the blast furnace feeding system elements and furnace burden for the corresponding modeling are provided. This makes any furnace feeding system unit modeling as well as various mechanical system design possible.

References.

1. Roche, M., Helle, M., & Saxén, H. (n.d.). Principal Component Analysis of Blast Furnace Drainage Patterns. Processes. https://doi.org/10.3390/pr7080519.

2. Ashish Agrawal, Swapnil C. Kor, Utpal Nandy, Abhik R. Choudhary, & Vineet R. Tripathi (2016). Real-time blast furnace hearth liquid level monitoring system. Ironmak. Steelmak. https://doi.org/10.1080/03019233.2015.1127451.

3. Mio, H., Narita, Y., Nakano, K., & Nomura, S. (2019). Validation of the Burden Distribution of the 1/3-Scale of a Blast Furnace Simulated by the Discrete Element Method. Processes, 8(1), 6. https://doi.org/10.3390/pr8010006.

4. Narita, Y., Mio, H., Orimoto, T., & Nomura, S. (2017). DEM Analysis of Particle Trajectory in Circumferential Direction at Bell-less Top. ISIJ International, 57. https://doi.org/10.2355/isijinternational.ISIJINT-2016-560.

5. Yong Feng, & Ziran Yuan (2020). Discrete element method modeling of granular flow characteristics transition in mixed flow. Computational Particle Mechanics. https://doi.org/10.1007/s40571-019-00309-1.

6. Henna Tangri, Yu Guo, & Jennifer S. Curtis (2019). Hopper discharge of elongated particles of varying aspect ratio: Experiments and DEM simulations. Chemical Engineering Science: X, 4, 100040. https://doi.org/10.1016/j.cesx.2019.100040.

7. Yang Xu, Jian Xu, Chengfeng Sun, Kaihui Ma, Cheng Shan, Liangying Wen, Shengfu Zhang, & Chenguang Bai (2018). Quantitative comparison of binary particle mass and size segregation between serial and parallel type hoppers of blast furnace bell-less top charging system. Powder Technology, 328. https://doi.org/10.1016/j.powtec.2018.01.020.

8. Nicolin Govendera, Daniel N. Wilke, Chuan-Yu Wu, Ugur Tuzun, & Hermann Kureck (2019). A numerical investigation into the effect of angular particle shape on blast furnace burden topography and percolation using a GPU solved discrete element model. Chemical Engineering Science, 204. https://doi.org/10.1016/j.ces.2019.03.077.

9. Jiangfeng Wan, Fugang Wanga, Guanghui Yang, Sheng Zhang, Mengke Wang, Ping Lin, & Lei Yang (2018). The influence of orifice shape on the flow rate: A DEM and experimental research in 3D hopper granular flows. Powder Technology, 335. https://doi.org/10.1016/j.powtec.2018.03.041.

10. Qi Luo, Qijun Zheng, & Aibing Yu (2017). From Micro to Macro: A Comparative Study of DEM and FEM in Modeling Hopper Flow. Springer Proceedings in Physics, 188. https://doi.org/10.1007/978-981-10-1926-5_102.

11. Ivaschenko, V. P., Kiriya, R. V., Selegej, A. M., Golov­ko, V. I., Ribalchenko, M. O., Papanov, G. A., & Selegej, S. N. (2017). Determination of parameters of shield discharge from bunkers of the infinite loading device of the blast furnace. Collection of research papers of National Mining University, 52, 192-198. ISSN 2071-1859.

• < Prev
• Next >