Metall. Res. Technol.
Volume 116, Number 1, 2019
|Number of page(s)||7|
|Published online||18 December 2018|
Sulphide capacity of CaO-SiO2-8%MgO-Al2O3-BaO slags ranging from 0% to 5% in BaO
School of Metallurgical Engineering, Xi’an University of Architecture and Technology,
710055, PR China
2 Research Center of Metallurgical Engineering and Technology of Shaan Xi, Xi’an University of Architecture and Technology, Xi’an 710055, PR China
* e-mail: email@example.com
Accepted: 24 July 2018
The sulphide capacities of CaO-SiO2-MgO-Al2O3-BaO slags were measured at 1773 K and 1823 K using the gas-slag equilibration method to estimate the desulphurization ability of the blast furnace slags that contained barium. The effects of basicity, the Al2O3 and BaO content of slags on the sulphide capacity of slags were studied. The relationship between the sulphide capacity and the optical basicity of the slags was also investigated. The experimentally determined results were compared with the sulphide capacities estimated by some previously reported models. The results showed that the sulphide capacity increased significantly when the basicity (CaO/SiO2) increased from 1.0 to 1.2, but decreased when the Al2O3 content increased in the slag. The increasing BaO content increased the sulphide capacity. The desulphurizing ability decreased when the BaO content was more than 3.5%. There was a linearly increasing relationship between the optical basicity and the sulphide capacity. The experimentally determined sulphide capacities were closest to the predicted values obtained by the Sosinsky and Sommerville’s model.
Key words: CaO-SiO2-MgO-Al2O3-BaO slags / sulphide capacity / optical basicity / gas-slag equilibration
© EDP Sciences, 2018
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