Вторинне електротермічне легування і рафінування низьколегованої сталі
The paper presents unit general scheme and research results for a new method of out-of-furnace steel processing based on an equilibrium shift in the metal-slag-gas system under the action of an electric charge applied to liquid slag – secondary electrothermal alloying and refining (SEAR). Thermodyna...
Saved in:
| Date: | 2023 |
|---|---|
| Main Authors: | , , |
| Format: | Article |
| Language: | Ukrainian |
| Published: |
Physico-technological Institute of Metals and Alloys
2023
|
| Subjects: | |
| Online Access: | https://www.metalsandcasting.com/index.php/mcu/article/view/183 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Journal Title: | Metal and Casting of Ukraine |
Institution
Metal and Casting of Ukraine| Summary: | The paper presents unit general scheme and research results for a new method of out-of-furnace steel processing based on an equilibrium shift in the metal-slag-gas system under the action of an electric charge applied to liquid slag – secondary electrothermal alloying and refining (SEAR). Thermodynamic modeling of SEAR based on the Gibbs method of chemical potentials confirms the high efficiency of this process and is in good agreement with the experimental results obtained previously. Depending on the polarity of the electric charge applied to the slag, SEAR can be used both for deoxidation, alloying, and desulfurization, as well as for oxidative refining and decarburization of liquid steel. The study reveals the influence of the specific charge of slag on the pressure of the gas phase, the content of impurities and alloying elements in the process of secondary electrothermal alloying and refining of low-alloyed steel. The main parameters of SEAR for technological operations of deoxidation, alloying, desulfurization, dephosphorization, and also oxidative refining and decarburization of liquid steel are determined. For alloying steel with alkaline earth metals, the SEAR technology allows the use of metallurgical slag instead of scarce flux-cored wire, which, in turn, contributes to the production of competitive steel with minimal cost. Unlike other methods of out-of-furnace alloying and refining, SEAR technology has several advantages, including the possibility of partial utilization of converter and blast furnace slag, a significant reduction in pollution by non-metallic inclusions during processing, reduction of emissions and smoke generation, and high economic efficiency. |
|---|