Numerical simulation of co-injection of pulverized coal and blast furnace gas separated by a membrane

ABSTRACT

The blast furnace gas separated by a membrane has a higher content of combustible components. In order to explore its secondary utilization in blast furnace production, numerical simulation is conducted by means of Fluent software, and the model is verified by experimental data. Results show that when the blast furnace gas separated by the membrane is used as pulverized coal carrier gas for blast furnace injection, the gas velocity in the furnace evidently increases, and the maximum injection velocity can reach 279 m s⁻¹. The formed high-temperature zone is closer to the centre of the blast furnace than those in the single injection of pulverized coal and in pulverized coal injection with general blast furnace gas as a carrier gas. The maximum temperature reaches 2610 K. Moreover, the pyrolysis reaction of pulverized coal is in advance, whereas the burnout rate of pulverized coal in the raceway presents a double-peak phenomenon.

KEYWORDS:

• Blast furnace gas
• secondary utilization
• pulverized coal injection
• numerical simulation

Acknowledgements

The authors are grateful for the financial support from the National Natural Science Foundation of China (51764039), Basic Public Welfare Research Project of Zhejiang Province (LQ19E040006), State key laboratory of advanced processing and recycling of non-ferrous metals, Lanzhou University of Technology (SKLAB02019013) and Project of Hongliu support discipline of Lanzhou university of technology.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

The authors are grateful for the financial support from the National Natural Science Foundation of China (51764039), Basic Public Welfare Research Project of Zhejiang Province (LQ19E040006), State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals, Lanzhou University of Technology (SKLAB02019013) and Project of Hongliu support discipline of Lanzhou University of Technology.