氧气高炉工艺研究进展及新炉型设计

The progress and the new profile design of oxygen blast furnace

从氧气高炉的数学模型、实验室实验以及工业试验角度系统分析了氧气高炉工艺的发展现状及趋势,同时讨论了氧气高炉炉型的设计依据。论述了氧气高炉的静态工艺模型研究需要计算合适的直接还原度和热空区温度,同时应考虑氧气高炉工况下生产率的变化、热损失的变化、风口煤粉的喷吹上限以及N2的循环积累等问题。指出了多维动力学模型和多目标优化模型中尚需解决的问题,以及氧气高炉数学模型的主要发展方向。结合文献研究中的氧气高炉特点,从炉身高度设计、炉腹角和炉身角设计以及风口设计3方面综述了氧气高炉炉型设计的变化规律。

The current researches and development trends of oxygen blast furnace process were summarized and discussed from the perspectives of mathematical model, laboratory experiment and industrial trial. Moreover, the profile design was discussed in this paper. The results show that proper direct reduction degree and thermal reserve temperature should be determined or used in the static simulation of blast furnace process. Meanwhile, compared with conventional blast furnace, the change of productivity, the change of heat loss, the limit of coal injection and the problem of N2 accumulation due to top gas recycling etc. should be all considered. It concluded the problems existing in the multi-dimensional kinetic models and multi-objective optimization models of oxygen blast furnace. Nevertheless, are pointed out future mathematical simulation trend of these two kinds of models. The profile designs including furnace height, bosh angle and shaft angle, and tuyeres were analyzed based on the characteristics of oxygen blast furnace process described in literatures.