Abstract
Experimental studies on phase equilibria in the multicomponent system PbO-ZnO-CaO-SiO2-FeO-Fe2O3 in air have been conducted to characterize the phase relations of a complex slag system used in commercial lead oxidation smelting. The liquidus in the pseudo-ternary section ZnO-“Fe2O3”-(PbO + CaO + SiO2) with the CaO/SiO2 weight ratio of 0.35 and the PbO/(CaO + SiO2) weight ratio of 5.0 has been constructed using results of over 100 high-temperature equilibration and quenching experiments followed by electron probe X-ray microanalysis. The liquidus in this pseudoternary section contains primary phase fields of spinel (zinc ferrite) Zn x Fe3−x O4+y , zincite Zn u Fe1−u O, melilite Pb v Ca2−v Zn w Fe1−w Si2O7, hematite Fe2O3, magneto-plumbite PbFe10O16, and dicalcium silicate Ca2−t Pb t SiO4. The laboratory results are compared with the slags obtained from an industrial reactor.
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Jak, E., Hayes, P.C. Experimental study of phase equilibria in the PbO-ZnO-“Fe2O3”-CaO-SiO2 system in air for high lead smelting slags (CaO/SiO2=0.35 and PbO/(CaO + SiO2)=5.0 by weight). Metall Mater Trans B 33, 817–825 (2002). https://doi.org/10.1007/s11663-002-0065-7
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DOI: https://doi.org/10.1007/s11663-002-0065-7