Multi-objective optimization of burner configurations in sintering ignition furnace: A CFD-based orthogonal test with matrix analysis

To achieve a comprehensive parameter optimization scheme for the sintering ignition furnace that facilitates energy conservation and productivity improvement, multi-objective optimization research on the burner configurations has been implemented by using computational fluid dynamics. An L 9 (3 3 ) orthogonal test was designed to focus on three key burner configuration parameters: ignition burner inclination angle, main burner airflow area, and main burner arrangement. Based on the range and matrix analyses, the orthogonal test results are meticulously analyzed, culminating in the identification of the optimal scheme. The optimization benefits are demonstrated through comparative analysis. Results indicate that the main burner arrangement affects the ignition quality most significantly, followed by the ignition burner inclination angle, with the main burner airflow area having the least impact. The optimal configuration includes setting the ignition burner inclination angle at 15°, the main burner airflow area at 1540 mm 2 , and a "7+7" uniform arrangement for the main burner. The flow field stability enhances markedly; the flame jet rigidity increases substantially; the burner jets mutual interference diminishes notably; the temperature field in the ignition section improves significantly. Compared to the baseline case, the average temperature in the ignition section increases by 40 K, while the temperature uniformity coefficient decreases by 4.99%.