A Modified Model for Calculating Theoretical Flame Temperature in Blast Furnace and Its Application |
| |
Authors: | Li ZHU Keng WU Er-hua ZHANG Yuan SHE Wen-long ZHAN Qi-hang LIU |
| |
Affiliation: | State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China |
| |
Abstract: | The theoretical flame temperature (TFT) before tuyere, always highly concerned by blast furnace (BF) operators, is one of the most important parameters for evaluating the thermal state of hearth. However, some influencing parameters, for example, the SiO2 reduction by carbon, were always neglected or inaccurate when calculating the TFT. According to the definition of TFT, the temperature of coke into raceway and the reduction rate of SiO2 in ash of coke and pulverized coal were obtained by analyzing the samples before tuyere in blast furnace. Taking full account of different factors, a modified model for calculating the TFT in blast furnace was established. The effects of the oxygen enrichment rate, the reduction rate of SiO2 in raceway, the ash content in coke and pulverized coal and the pulverized coal injection (PCI) rate on TFT were determined quantitatively. The modified model was applied to selecting the used coal for PCI in blast furnace. Considering the different SiO2 contents of mixed coal, the calculated TFT remained a stable level. This showed that the selected coal could be suitable for PCI in blast furnace. |
| |
Keywords: | theoretical flame temperature blast furnace SiO2 reduction rate modified model    |
本文献已被 CNKI 万方数据 等数据库收录! |
| 点击此处可从《钢铁研究学报(英文版)》浏览原始摘要信息 |
|
点击此处可从《钢铁研究学报(英文版)》下载全文 |
|