About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Steels for Sustainable Development IV
|
| Presentation Title |
Removal of Copper from Steel Scrap Via Sulfide Salts Treatment |
| Author(s) |
Keyan Matar, Xiaolei Guo, Jianyue Zhang, Yuxuan Shui, Gerald S. Frankel, Alan Luo, Jianxun Hu, Brian Sieger |
| On-Site Speaker (Planned) |
Xiaolei Guo |
| Abstract Scope |
Steel production is increasingly embracing scrap recycling to reduce energy consumption and greenhouse gas emissions. However, recycled steel scrap from end-of-life vehicles often introduces undesirable tramp elements like copper into the steel. Copper is particularly problematic because it causes hot shortness during hot working. In this study, we present the use of a molten sulfur-containing salt flux to effectively remove copper from a steel melt through the formation of CuS. CALPHAD analysis was performed to determine an ideal ratio of various sulfur-containing salts, balancing multiple properties such as copper solubility, gas formation, and favorable reactions. Upon allowing a specific weight ratio of salts and steel to react at 1600 oC, over 93 % of copper was removed from the steel samples. The results indicate sulfidation via molten salts is a promising pathway for dealing with excess copper in steel scraps. |