Experiment Research on Pulverized Coal Combustion in the Tuyere of Oxygen Blast Furnace

• Published in: High temperature materials and processes Vol. 38; no. 2019; pp. 42 - 49
• Main Authors: Chai, Yi-fan, Zhang, Jian-liang, Shao, Qiu-jun, Ning, Xiao-jun, Wang, Kai-di
• Format: Journal Article
• Language: English
• Published: Berlin De Gruyter 25.02.2019; Walter de Gruyter GmbH
• Subjects: 82.33.Vx; Blast furnaces; Coal; Coal injection; Combustion; combustion rate; Computer simulation; Deduction; Flammability; High temperature; new experimental equipment; Oxygen; oxygen blast furnace; Pulverized coal; pulverized coal injection; Steel industry; Tuyeres; unburned pulverized coal
• ISSN: 0334-6455; 2191-0324
• DOI: 10.1515/htmp-2017-0141

The actual combustion rate of pulverized coal in the blast furnace tuyere is hard to be measured. In this research, the combustion rate of pulverized coal injected into oxygen blast furnace was obtained by a new equipment. This equipment can simulate the actual blast furnace well, and the relationship between pulverized coal injection (PCI) ratio and was established by mathematical deduction. The experimental results show that the best combustibility of the four pulverized coals is C, and when the coal injection ratio is 350 kg/tHM, the combustion rate can be reached 79%, while the combustion rate of B in the same case is only 45.6%. With the increase of , the relative amount of oxygen to coal increases, the combustion conditions become better, and combustion rate of the pulverized coal increases. In addition, under the condition of high temperature and rapid combustion, with the increase of coal’s volatile, the combustion rate increases and the corresponding PCI ratio is also increased. By using the new equipment, the unburned coal under the oxygen blast furnace conditions can be collected for further study.