One of the major challenges for Europe’s future steel production will be minimizing the inherent process emissions in the production of crude steel based on iron ores. In this case, mainly the reduction of CO₂ emissions is a focus. One promising process to overcome these problems is the hydrogen plasma smelting reduction (HPSR) process. This process has been studied for several years already at the Chair of Ferrous Metallurgy at Montanuniversitaet Leoben. The work presented focused on the stability of plasma arcs in the DC transferred arc system of the HPSR process. The stable operating plasma arc is of utmost importance for the future development of the process. The major objective is the definition of the most favorable conditions for this kind of arc. Therefore, tests were conducted to define fields of a stable operating plasma arc for multiple gas compositions and process variables. For several gas compositions of argon, nitrogen, argon/nitrogen, argon/hydrogen and nitrogen/hydrogen, fields of stability were measured and defined. Besides, the major influencing parameters and trends for the fields of stability were evaluated and are shown in this work.

中文翻译：

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HPSR工艺中电弧等离子体的稳定性场研究

欧洲未来钢铁生产的主要挑战之一将是最大程度地减少基于铁矿石的粗钢生产中固有的过程排放。在这种情况下，主要是减少CO ₂排放是重点。克服这些问题的一种有前途的过程是氢等离子体熔炼还原（HPSR）过程。Montanuniversitaet Leoben的亚铁冶金学主席已经对该工艺进行了数年的研究。提出的工作集中于HPSR工艺的直流转移电弧系统中等离子弧的稳定性。稳定运行的等离子弧对于该方法的未来发展至关重要。主要目的是为这种电弧确定最有利的条件。因此，进行了测试以定义用于多种气体成分和工艺变量的稳定工作的等离子弧的场。对于氩，氮，氩/氮，氩/氢和氮/氢的几种气体成分，测量并确定了稳定性场。除了，