ABSTRACT

In the tapping process of electric arc furnace, aluminium is usually charged into the ladle to remove the oxygen, which increased the cost and reduced steel cleanliness. Recently, a new technology called Tapping Online Refining (TOR) has been developed to solve the problem of peroxidation and excessive inclusions. In this study, both numerical simulation and water experiment were developed to investigate the behaviour of carbon powder supplied with nitrogen into the tapping flowing, the mixing time and powder utilization efficiency under various injection angles. The results showed that when the lance angle was 50°, the macro movement of carbon powder particles could create the best kinetic conditions. Industrial experiment was carried out in a 65t consteel EAF, and showed that, compared with traditional process, the TOR process can increase the alloy utilization by 3–5% and reduce over 40% of the initial precipitation deoxidation inclusions.

摘要

在电弧炉出钢过程中，通常将铝加入钢包中以去除氧气，这增加了成本，降低了钢的清洁度。最近，开发了一种名为Tapping Online Refining (TOR) 的新技术来解决过氧化和夹杂物过多的问题。在本研究中，通过数值模拟和水实验，研究了在不同喷射角度下充氮的碳粉进入出钢流的行为、混合时间和粉末利用效率。结果表明，当喷枪角度为50°时，碳粉颗粒的宏观运动可以创造最佳的动力学条件。在一台 65t 钢电弧炉上进行了工业试验，结果表明，与传统工艺相比，