Zinc and Lead Metallurgical Slags as a Potential Source of Metal Recovery: A Review

Nowińska, Katarzyna; Adamczyk, Zdzisław

doi:10.3390/ma16237295

Cited by 5 publications

(2 citation statements)

References 66 publications

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“…This suggests from another perspective that ZnO(s,l) will react with other components and that Zn(s,l,g) may come from slag-phase reaction. Similar reaction models can be found in blast furnaces, converters, and electric furnaces [21][22][23][24]. Among them, the Fe-ZnO-FeO system can be considered, and Fe or FeO are the reducing agents.…”

Section: Introductionmentioning

confidence: 89%

Volatilisation Behaviour and Mechanism of Lead-Containing Slag during Physical Property Tests

Tang,

Zhao

2024

Materials

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According to physical property tests of lead-containing slag, the volatilisation behaviour of lead slag will have adverse impacts on test accuracy and further affect the control of chemical reactions, solidification and removal of inclusions during smelting. To analyse the volatilisation characteristics of lead slag, in this paper, four kinds of lead slags from lead direct reduction smelting with different PbO and ZnO content are taken. thermogravimetry, ISP-TOF were used. Additionally, the changes in volatiles and slag composition and phases were analysed with XRD and ICPS, and the volatilisation reaction mechanism was discussed. The results indicated that the volatilisation of lead slag can lead to a big weight loss of about to the slag with higher PbO content. The weight loss increases with the PbO content in slag increases. The volatile corresponding to the weight loss above 900 °C is mainly PbO and less ZnO. The higher the temperature is, the stronger the volatilisation is. With the increase in temperature and keeping time, most of the PbO can be evaporated and leaves little PbO in the residual slag. This will has great effect to physico-chemical property measurement of the slag with higher PbO content, especially to the property measurement that be kept at high temperature for a long time. Because the volatiles is trend to condense with the temperature decrease, mass spectrometer is limited by the condensation of volatiles, i.e., PbO, ZnO and so on, in the connection pipeline. The device should be modified for this use.

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Section: Introductionmentioning

confidence: 89%

Volatilisation Behaviour and Mechanism of Lead-Containing Slag during Physical Property Tests

Tang,

Zhao

2024

Materials

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“…Currently, not only in Kazakhstan but also in the world, zinc and lead are the most important metals that form modern industry, the metallurgical industry and the circular economy (circular economy) of different countries of the world (Circular Economy (CE)) [1]. The main amount of lead (over 65%) is used for the production of batteries, a significant part of which is used for the manufacture of electrical cable sheaths.…”

Section: Introductionmentioning

confidence: 99%

Mechanism and technological results of sulfidation roasting of oxidized lead compounds

Chepushtanova,

Merkibayev,

Mamyrbayeva

et al. 2024

Kompl. Ispolz. Min. Syra = Compl. Use of Min. Resour.

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The paper presents the results of a critical analysis of existing technologies for processing lead-zinc ores and industrial products; the relevance of the research lies in the development of methods aimed at additional extraction of zinc and lead in conditions of a rapid decrease in the content of lead and zinc in ores. The paper presents research on the thermodynamic justification of sulfiding roasting, the results of the development of technology for intensifying the process of processing poor, difficult-to-process complex lead-zinc ores and middlings through preliminary thermal activation by sulfiding roasting in a fluidized bed furnace. The mechanism of sulfidation of oxylated lead compounds has been established according to the scheme: PbO → PbO·PbSO4 → PbSO4 → PbS. The results of the physicochemical study of roasting products, as well as the results of magnetic enrichment of cinders, are presented. The results of magnetic separation of cinders after heat treatment of industrial products show that it is possible to separate up to 70% of iron in the form of pyrrhotite into a magnetic product, while the pyrrhotite content in the magnetic product is up to 98.2%. The paper presents a new technological scheme for processing lead-zinc industrial products from enrichment to obtain pyrrhotites with predicted properties.

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Potential for the Recovery of Selected Metals and Critical Raw Materials from Slags from Polymineral Zn–Pb Ore Metallurgy—Part I

Cempa,

Lejwoda,

Karabela

et al. 2024

Minerals

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Slags from the Silesia–Cracow Upland (Poland), including ten historical slags (deposited in waste dumps) and four contemporary slags (from current production), were examined to compare their chemical and mineralogical properties as well as to assess their potential for the recovery of selected metals and critical raw materials. The historical slags associated with the smelting of polymetallic ores originating from Mississippi Valley-type (MVT) deposits consisted primarily of gypsum. The contemporary slags, obtained from industrial waste rich in zinc and lead, were predominantly spinels (magnesium-aluminate and ferric) that exhibited higher iron content (up to 46.6 wt% of Fe2O3) compared to the historical slags (up to 26.1 wt% of Fe2O3). The zinc content was similar for both the slag types (3.5 wt% Zn). The average titanium and arsenic contents in the old and contemporary slags were at the same level as well, with 0.21 wt% (Ti) and 0.13 wt% (As), respectively. The contemporary slags contained higher levels of critical raw materials, such as cobalt, nickel, copper, and manganese, compared to the historical slags. Rare earth elements (REEs) were also more abundant in the contemporary slags, with an average content of 212 ppm, while the historical slags averaged 124 ppm. These findings underscore the potential for recovering valuable metals and critical raw materials from such slags, presenting opportunities for resource optimisation and environmental management.

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Zinc and Lead Metallurgical Slags as a Potential Source of Metal Recovery: A Review

Cited by 5 publications

References 66 publications

Volatilisation Behaviour and Mechanism of Lead-Containing Slag during Physical Property Tests

Volatilisation Behaviour and Mechanism of Lead-Containing Slag during Physical Property Tests

Mechanism and technological results of sulfidation roasting of oxidized lead compounds

Potential for the Recovery of Selected Metals and Critical Raw Materials from Slags from Polymineral Zn–Pb Ore Metallurgy—Part I

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