采用物理化学和CFD方法模拟纯氢运行的DR轴
Modelling a DR shaft operated with pure hydrogen using a physical-chemical and CFD approach
摘要：
考虑到其低二氧化碳排放，氢基路线可能是一种有价值的钢铁生产方式。在ULCOS，它被视为一个长期的选择，在很大程度上取决于氢经济的出现。为了预测其可能的发展，决定检查在直接还原竖炉中使用100% H2的可行性，并通过适当的实验和建模工作确定最佳操作条件。我们从头开始开发了一个新的模型，称为REDUCTOR，用于模拟这个过程并预测其性能。这个复杂的数值模型是基于对发生的详细物理、化学和热现象的数学描述。特别是，动力学是从实验中推导出来的。当前版本适用于纯氢还原，但计划将模型扩展到CO，以便它也适用于当前DR过程的模拟和优化。初步结果证实了氢还原比CO还原快得多，从而有可能设计出比现有MIDREX和HYL小得多的氢操作轴式反应器。
英文摘要：
The hydrogen-based route could be a valuable way to produce steel considering its low carbon dioxide emissions. In ULCOS, it is regarded as a long-term option, largely dependent on the emergence of a hydrogen economy. To anticipate its possible development, it was decided to check the feasibility of using 100% H2 in a Direct Reduction shaft furnace and to determine the best operating conditions, through appropriate experimental and modelling work. We developed from scratch a new model, called REDUCTOR, for simulating this process and predicting its performance. This sophisticated numerical model is based on the mathematical description of the detailed physical, chemical and thermal phenomena occurring. In particular, kinetics were derived from experi-ments. The current version is suited to the reduction with pure hydrogen, but an extension of the model to CO is planned so that it will also be adapted to the simulation and optimisation of the current DR processes. First re-sults have confirmed that the reduction with hydrogen is much faster than that with CO, making it possible to design a hydrogen-operated shaft reactor quite smaller than current MIDREX and HYL.
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