Prediction model based on artificial neural network for pyrophyllite mechano-chemical activation as an integral step in production of cement binders

Terzić, Anja; Radulović, Dragan; Stojanović, Jovica; Pezo, Lato; Radojević, Zagorka; Andrić, Ljubiša

doi:10.1016/j.conbuildmat.2020.119721

Cited by 12 publications

(6 citation statements)

References 47 publications

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“…The values of the water absorption coefficient decrease with increasing content of Pb-Zn filler. The addition of filler aided in the better 'packing' of the microstructure, leaving fewer voids and pores behind, and thus lowering the examined material's water absorption capability [66,67].…”

Section: Application Of Pb-zn Slag In Construction Materialsmentioning

confidence: 99%

Reapplication Potential of Historic Pb–Zn Slag with Regard to Zero Waste Principles

Radulović,

Terzić,

Stojanović

et al. 2024

Sustainability

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Smelting used to be less efficient; therefore, wastes obtained from historical processing at smelter plants usually contain certain quantities of valuable metals. Upon the extraction of useful metal elements, metallurgical slag can be repurposed as an alternative mineral raw material in the building sector. A case study was conducted, which included an investigation of the physico-chemical, mineralogical, and microstructural properties of Pb–Zn slag found at the historic landfill near the Topilnica Veles smelter in North Macedonia. The slag was sampled using drill holes. The mineralogical and microstructural analysis revealed that Pb–Zn slag is a very complex and inhomogeneous alternative raw material with utilizable levels of metals, specifically Pb (2.3 wt.%), Zn (7.1 wt.%), and Ag (27.5 ppm). Crystalline mineral phases of wurtzite, sphalerite, galena, cerussite, akermanite, wüstite, monticellite, franklinite, and zincite were identified in the analyzed samples. The slag’s matrix consisted of alumino-silicates, amorphous silicates, and mixtures of spinel and silicates. Due to the economic potential of Pb, Zn, and Ag extraction, the first stage of reutilization will be to transform metal concentrates into their collective concentrate, from which the maximum amount of these crucial components can be extracted. This procedure will include combination of gravity concentration and separation techniques. The next step is to assess the Pb–Zn slag’s potential applications in civil engineering, based on its mineralogical and physico-mechanical properties. Alumino-silicates present in Pb–Zn slag, which contain high concentrations of SiO2, Al2O3, CaO, and Fe2O3, are suitable for use in cementitious building composites. The goal of this research is to suggest a solution by which to close the circle of slag’s reutilization in terms of zero waste principles. It is therefore critical to thoroughly investigate the material, the established methods and preparation processes, and the ways of concentrating useful components into commercial products.

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Section: Application Of Pb-zn Slag In Construction Materialsmentioning

confidence: 99%

Reapplication Potential of Historic Pb–Zn Slag with Regard to Zero Waste Principles

Radulović,

Terzić,

Stojanović

et al. 2024

Sustainability

Self Cite

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“…The values of the water absorption coefficient are decreasing with increasing content of Pb-Zn filler. The addition of filler aided in better 'packing' of the microstructure, leaving fewer voids and pores behind, lowering the examined material's water absorption capability [68,69]. Values of mechanical strengths (CS -compressive strength and FS -flexural strength) measured after 2, 7, and 28 days of hardening are provided in Figure 9.…”

Section: Application Of Pb-zn Slag In Construction Materialsmentioning

confidence: 99%

Reapplication Potential of Historic Pb-Zn Slag in Regard to Net Zero Principles

Radulović,

Terzić,

Stojanović

et al. 2023

Preprint

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Smelting used to be less efficient in the past, so wastes obtained from historical processing at smelter plants usually contain certain quantities of valuable metals. A case study was conducted, which included an investigation of the physicochemical, mineralogical, and microstructural properties of raw material found at the historic slag pond near the Topilnica Veles smelter in North Macedonia. The Pb-Zn slag was sampled using traditional geophysical methods such as drill holes and pitholes. The mineralogical and microstructural analysis revealed that the Pb-Zn slag is a very complex and inhomogeneous alternative raw material with utilizable levels of metals, specifically Pb (2.24 wt%), Zn (7.10 wt%), and Ag (27.53 ppm). Amorphous phase, lead alloys, zinc alloys, wurtzite, sphalerite, galena, cerussite, elemental silver, elemental copper, elemental iron, magnetite, spinel, rutile, hematite, and troilite were also identified through qualitative mineralogical analysis. The glassy matrix composed of spinel, silicates, and mixed spinel-silicate is the most abundant constituent in slag composition. The various potential applications of the slag are possible based on its mineralogical and geochemical properties. Because the extraction of Pb, Zn, and Ag has certain economic potential, the next step, which will include gravity concentration and magnetic separation procedures, will be to form metal concentrates into their collective concentrate, from which the maximum amount of silver can be extracted. Slag's amorphous spinel, silicate, and mixed spinel-silicate phases, which contain high concentrations of SiO2, Al2O3, CaO, and Fe2O3, are suitable for use in building materials such as cement clinker, filler, or aggregate for concrete or mortar. The goal of this research is to close the circle of slag's reutilization potential in terms of Net Zero and Zero Waste principles, so it is critical to thoroughly investigate the material and establish methods and preparation processes, as well as ways of concentrating useful components into commercial products.

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“…It has wide applications as a substitute for feldspar and silica due to its beneficial technical properties. The uses of pyrophyllite in industry include its application as a refractory material in the refractory industry and as a raw material in the ceramic, fiberglass, and cosmetic industries [51,52]. Moreover, pyrophyllite is used as filler in the paper, plastic, paint, and pharmaceutical industries [53]; as a soil conditioner in fertilizer applications; and as a dusting agent in the rubber and asphalt industries [54,55].…”

Section: Pyrophyllite's Industrial Applicationsmentioning

confidence: 99%

“…Since high-grade pyrophyllite ores are rare globally, to be suitable for industry, lowgrade pyrophyllite ores must be enriched to remove impurities such as Fe and Ti and increase the alumina content [37][38][39]52]. Techniques for upgrading low-grade pyrophyllite ore vary depending on the characterization of the outcomes; these methods include physical separation techniques, chemical separation techniques, and separation techniques that combine the two [8,19].…”

Section: Enrichment Of Low-grade Pyrophyllite Orementioning

confidence: 99%

Pyrophyllite: An Economic Mineral for Different Industrial Applications

Ali

Ahmed

et al. 2021

Applied Sciences

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Pyrophyllite (Al2Si4O10(OH)2) is a phyllosilicate often associated with quartz, mica, kaolinite, epidote, and rutile minerals. In its pure state, pyrophyllite exhibits unique properties such as low thermal and electrical conductivity, high refractive behavior, low expansion coefficient, chemical inertness, and high resistance to corrosion by molten metals and gases. These properties make it desirable in different industries such as refractory; ceramic, fiberglass, and cosmetic industries; as filler in the paper, plastic, paint, and pesticide industries; as soil conditioner in the fertilizer industry; and as a dusting agent in the rubber and roofing industries. Pyrophyllite can also serve as an economical alternative in many industrial applications to different minerals as kaolinite, talc, and feldspar. To increase its market value, pyrophyllite must have high alumina (Al2O3) content, remain free of any impurities, and possess as much whiteness as possible. This paper presented a review of pyrophyllite’s industrial applications, its important exploitable properties, and the specifications required for its use in industry. It also presents the most effective and economical techniques for enriching low-grade pyrophyllite ores to make them suitable for various industrial applications.

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Prediction model based on artificial neural network for pyrophyllite mechano-chemical activation as an integral step in production of cement binders

Cited by 12 publications

References 47 publications

Reapplication Potential of Historic Pb–Zn Slag with Regard to Zero Waste Principles

Reapplication Potential of Historic Pb–Zn Slag with Regard to Zero Waste Principles

Reapplication Potential of Historic Pb-Zn Slag in Regard to Net Zero Principles

Pyrophyllite: An Economic Mineral for Different Industrial Applications

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