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Keywords = lead–zinc sublimates

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15 pages, 4784 KiB  
Article
Thermodynamic and Experimental Substantiation of Comprehensive Processing of Zinc Sulfide Ore and Its Concentration Tailings to Extract Non-Ferrous Metals and Produce a Silicon Ferroalloy
by Viktor Shevko, Baktygul Makhanbetova, Dosmurat Aitkulov, Alexandra Badikova and Daniel Amanov
Minerals 2024, 14(8), 819; https://doi.org/10.3390/min14080819 - 13 Aug 2024
Cited by 1 | Viewed by 1570
Abstract
This article presents the results of thermodynamic and experimental studies on the joint processing of a mixture of Shalkiya deposit zinc–lead sulfide ore and its concentration tailings in the presence of coke and magnetite. Using the HSC-6.0 software package, it was established by [...] Read more.
This article presents the results of thermodynamic and experimental studies on the joint processing of a mixture of Shalkiya deposit zinc–lead sulfide ore and its concentration tailings in the presence of coke and magnetite. Using the HSC-6.0 software package, it was established by thermodynamic modeling that the silicon-containing products of the SiO2 reduction in the system under consideration are FeSi, Si, Fe3Si, Fe5Si3, FeSi2, FeSi2.33, and SiOg, which, based on the starting reduction temperature, form an increasing series: Fe3Si (1200 °C); Fe5Si3, Si (1400 °C); and SiOg, FeSi2, FeSi2.33 (1500 °C). The smelting of the zinc–lead sulfide ore and concentration tailings mixture in the case of replacing 55% of the iron contained in the magnetite concentrate with steel shavings iron allowed us to produce FeSi45 ferrosilicon (41.9%–42.1% Si), with the extraction of 85% of the silicon in it, and sublimates containing 26.03% zinc and 13.47% lead, with the extraction of 97% of the zinc and 99% of the lead in them. In comparison with the initial ore-tailings mixture, the resulting sublimates are 11.83 times richer in zinc. Full article
(This article belongs to the Special Issue Advances in Pyrometallurgy of Minerals and Ores)
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12 pages, 4506 KiB  
Article
Processing Dross from Hot-Dip Galvanizing by Chlorination Roasting
by Nurlan Kalievich Dosmukhamedov, Arkady Kaplan, Erzhan Esenbaiuly Zholdasbay, Gulzada Myngyshkyzy Koishina, Yeleussiz Bolatovich Tazhiev, Aidar Argyn, Yerzhan Itemenovich Kuldeyev and Valery Kaplan
Sustainability 2021, 13(22), 12530; https://doi.org/10.3390/su132212530 - 12 Nov 2021
Cited by 2 | Viewed by 3120
Abstract
Dross from hot-dip galvanizing is an important source of pure zinc ingots and zinc oxide for use as mineral additives in animal and poultry feed. Thermodynamic calculations have shown the possibility of solving the issue of dross processing by roasting using CaCl2 [...] Read more.
Dross from hot-dip galvanizing is an important source of pure zinc ingots and zinc oxide for use as mineral additives in animal and poultry feed. Thermodynamic calculations have shown the possibility of solving the issue of dross processing by roasting using CaCl2 and NH4Cl. The influence of the consumption of chlorinating reagents, the roasting temperature on the degree of sublimation of Pb, Fe, Ni, Cu and Cd has been investigated. It has been shown that the best results are achieved when roasting the dross with the simultaneous use of CaCl2 and NH4Cl in amounts of 6 and 15% by weight of the feed material. The optimal roasting parameters were established: T = 1000 °C, duration—60 min, air flow—0.1 L/min. Recovered pure zinc oxide composition (%) was: 0.05 Pb, 0.15 Fe, 0.06 Ni, 0.003 Cu and 0.001 Cd. The degree of sublimation of copper, nickel and iron chlorides was ~75%, with lead and cadmium at 90–98% of their initial amount in the dross. Full article
(This article belongs to the Special Issue Environmental Sustainability of Current Waste Management Practices)
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