Metall. Res. Technol.
Volume 117, Number 2, 2020
|Number of page(s)||7|
|Published online||23 March 2020|
The viscous behavior and potassium removal capacity of CaO–SiO2–8wt%MgO–17wt%Al2O3–2.5wt%BaO–K2O slag
State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing,
100083, PR China
2 School of Metallurgical Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, PR China
* e-mail: email@example.com
Accepted: 17 February 2020
The viscous behavior and potassium removal capacity of CaO–SiO2–8wt%MgO–17wt%Al2O3–2.5wt%BaO–K2O slag system with CaO/SiO2 of 1.07 were studied. The effect of K2O content ranging from 0 to 5 wt% on the viscosity, slag structure, apparent activation energy and potassium removal rate of present slag were analyzed. The results showed that with increase of K2O content in slag, the viscosity and apparent activation energy tended to increase. When adding K2O into the present slag, K+ ion rather than Ba2+ could preferentially compensate [AlO4] tetrahedron and more complex network structures would be formed, leading to higher polymerization degree of slag. The potassium removal rate was related to the reduction degree of K+ by carbon, and with rising of temperature and increasing of K2O content there was a decreasing trend for the potassium removal capacity of slag.
Key words: blast furnace slag / viscosity / potassium removal rate / slag structure
© EDP Sciences, 2020
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