TY - JOUR
T1 - Thermodynamic properties of lead oxide in a mixture of stainless steelmaking and nonferrous smelting slags
AU - Maruoka, Nobuhiro
AU - Ueda, Shigeru
AU - Shibata, Hiroyuki
AU - Yamaguchi, Katsunori
AU - Kitamura, Shin Ya
PY - 2012/6/1
Y1 - 2012/6/1
N2 - In our previous paper, a slag modification process involving the mixing of stainless steelmaking and nonferrous smelting slags was proposed for preventing the disintegration of the stainless steelmaking slag. In order to use this method, the behavior of heavy metals especially PbO contained in the nonferrous slag has to be assessed. In the present study, the activity coefficient of PbO in CaOSiO 2- Fe tO-Al 2O 3-MgO and CaO-SiO 2-Fe tO slags saturated with iron was measured at 1673 K. The results showed that the activity coefficient of PbO increased with basicity and had a maximum value when the basicity was approximately 1.0. The equilibrium PbO content in the modified slag had a minimum value that corresponded to a mixing ratio of 0.6. The trend was similar to the change in the removal ratio of PbO observed in the previous study. Therefore, the change in the oxygen potential and the change in the activity coefficient of PbO can be considered the cause of this trend.
AB - In our previous paper, a slag modification process involving the mixing of stainless steelmaking and nonferrous smelting slags was proposed for preventing the disintegration of the stainless steelmaking slag. In order to use this method, the behavior of heavy metals especially PbO contained in the nonferrous slag has to be assessed. In the present study, the activity coefficient of PbO in CaOSiO 2- Fe tO-Al 2O 3-MgO and CaO-SiO 2-Fe tO slags saturated with iron was measured at 1673 K. The results showed that the activity coefficient of PbO increased with basicity and had a maximum value when the basicity was approximately 1.0. The equilibrium PbO content in the modified slag had a minimum value that corresponded to a mixing ratio of 0.6. The trend was similar to the change in the removal ratio of PbO observed in the previous study. Therefore, the change in the oxygen potential and the change in the activity coefficient of PbO can be considered the cause of this trend.
KW - Activity coefficient
KW - Nonferrous smelting slag
KW - PbO
KW - Stainless steelmaking slag
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U2 - 10.1515/htmp-2011-0139
DO - 10.1515/htmp-2011-0139
M3 - Article
AN - SCOPUS:84866622302
VL - 31
SP - 273
EP - 279
JO - High Temperature Materials and Processes
JF - High Temperature Materials and Processes
SN - 0334-6455
IS - 3
ER -