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According to the ion and molecule coexistence theory, a thermodynamic model of lead oxide activity in PbO–CaO–SiO2–FeO–Fe2O3 slag system was established at the temperature of 1273–1733 K. The activities of PbO in slag were calculated, and their equal activity curves were plotted. The influences of slag basicity Q, iron oxide rate R and temperature T on activity NPbO and activity coefficient γPbO were...
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