CFD Modeling and Validation of Blast Furnace Gas/Natural Gas Mixture Combustion in an Experimental Industrial Furnace

The use of residual gases from steel production processes as fuel for treatment furnaces has attracted great interest a method reducing fossil consumption and the footprint. However, these often have low calorific value, direct substitution can lead to temperatures or combustion instability issues. CFD simulations help producers forecast results before real testing implementation. In this study, model an industrial experimental furnace in sector is developed validated. are calculated using combustion, radiation, heat transfer models included software Ansys Fluent. validation simulated performed with data acquired tests under same conditions at three air-to-fuel equivalence ratios, which vary excess 0% 5% oxygen outlet. adjusted results, capturing trends measured physical variables pollutant concentrations. case temperature, differences between values 0.03% 6.9. Based on simulation blast gas produces inside chamber 1004 °C 1075 high stream velocities because flow needed keep power constant. Flames exhibit straight movements since flows absorb effect swirling flames. addition natural increases temperature up 1211 reduces length Finally, 1298 shorter flames reached enriched oxygen, but case, NOx emissions need be controlled.