Evaluation of mixed heat effect of fuel gas and coke in steelmaking flue

• DOI: 10.1007/s10973-018-7940-1
• Publication Date: 2018-11-30T03:50:32Z
• Authors: Jian-bo Xie; Jian-an Zhou; Xue-kai Jiang; Hua Zhang
• Keywords: 0205 materials engineering; 02 engineering and technology; 7. Clean energy

In order to further investigate the effect of coke injection on the total net calorific value of fuel gas, this paper continues to explore the increased essence of calorific value of fuel gas, associated with the previous results of pilot trials in the steel plant. Combined with methods of thermodynamics and mathematics, the calculated calorific values of fuel gas and heat effects in various schemes were compared, evaluated, and discussed. The results show that the ideal total equivalent calorific values of B1, B2, B3, and B4 were − 231,088, − 399,303.5, − 571,043.9, and 3,880,615 J mol−1, respectively, smaller than those of gasification. When the $$\beta_{\rm {i,j}}$$ values of CO2 and O2 were 56.65% and 50.5%, respectively, whereas the CO was 16%. The equivalent exothermic heat and absorbed heat were − 144,617.17 J mol−1 and 2.98,807 × 107 J mol−1, respectively. And the $$\Delta Q_{{\rm i,{\text{CO}}}}$$ values of schemes 15, 17, and 18 were far more than 3000 kJ Nm−3. Besides, due to small content of oxygen, the heat effect of oxygen was ignored. The increased calorific values of fuel gas in schemes 15, 17, and 18 were 67,282.892, 71,488.073, and 83,052.32 kJ Nm−3, respectively, far more than 60,000 kJ Nm−3. Thus, the total calorific values of fuel gas were greatly improved.