Pulverized coal injection technique has been widely used as a means of reducing coke consumption during ironmaking process. Owing to the increasing shortage of fossil fuels, other substitutes such as biomass, plastic, and waste tires have been studied in recent years. Coke breeze as one of the by-products of coking industries has been investigated as a substitute for partial pulverized coals. The combustion characteristics of blended fuels were estimated based on the flammability index C and the combustion characteristic index S. For different coke breeze additions, the combustion was divided into two stages, and the apparent kinetic parameters of the two stages were estimated by fitting the experimental data to the shrinkage reaction model and shrinkage diffusion model, respectively. Results showed that with the increase in coke breeze addition from 15% to 60%, the indexes C and S decrease, and the activation energy of the first stage remains almost constant, while that of the last stage increases from 16.89 up to 67.18 kJ mol⁻¹, which indicates that adding coke breeze decreases the combustion efficiency of pulverized coal. Comparing the combustion and kinetic parameters under different coke breeze addition conditions, the optimal addition amount is suggested to be within 15%.

煤粉喷射技术已被广泛用作减少炼铁过程中焦炭消耗的一种手段。由于化石燃料的日益短缺，近年来已经研究了其他替代品，例如生物质，塑料和废轮胎。已经研究了焦炭微风作为焦化工业的副产品之一，以替代部分粉煤。基于可燃性指数C和燃烧特性指数S估算混合燃料的燃烧特性。对于不同的焦风添加量，将燃烧分为两个阶段，并通过将实验数据分别拟合至收缩反应模型和收缩扩散模型来估计这两个阶段的表观动力学参数。结果表明，随着焦风添加量从15％增加到60％，指标C和S降低，第一阶段的活化能几乎保持恒定，而最后阶段的活化能从16.89增加到67.18 kJ mol。^-1，表明添加焦炭微风会降低煤粉的燃烧效率。比较不同焦炭添加条件下的燃烧和动力学参数，建议最佳添加量在15％以内。