中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 22 No. 3 March 2012 |
（1. Metallurgy and Materials Department, IPN-ESIQIE, UPALM, Lindavista, C.P. 07738, Mexico D.F.;
2. Servicios Administrativos Peñoles S. A de C. V. Prol. Comonfort Sur 2050,
Col. L. Echeverría, Torreón, C. P. 27300 Coahuila, Mexico）
Abstract:Experimental studies on phase equilibria and liquidus temperature in the PbO−ZnO−CaO−SiO2−“Fe2O3” system, with the mass ratios of CaO/SiO2=1−1.6 and Fe/SiO2= 1.3−1.7, and 40% PbO and 8% ZnO, were carried out between 1273 and 1573 K. Slags were equilibrated at 1273 to 1573 K and cooled rapidly by quenching. The XRD and SEM−EDS results showed that the slag compositions are in the franklinite primary phase field. Calcium and lead silicates are formed between 1373 and 1473 K. The Ca/Pb silicate and magnetoplumbite phases are partially formed by an incongruent reaction. The experimental and thermodynamical results showed that the liquidus increased by increasing CaO/SiO2 mass ratio and decreasing Fe/SiO2 mass ratio.
Key words: lead slags; phase equilibria; liquidus temperature
