Characterization and mass balance of trace elements in an iron ore sinter plant

Lau, Lucas Ladeira; Castro, Luiz Fernando Andrade de; Dutra, Flávio de Castro; Cantarino, Marcos Vinícius

doi:10.1016/j.jmrt.2015.10.007

Cited by 17 publications

(7 citation statements)

References 3 publications

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“…Thermodynamic calculations suggest that Fe evaporates as Fe chloride gas under the presence of Cl . Source materials for sintering contain several hundred g/t of Cl . In addition, the boiling temperatures of FeCl 2 (1000 °C) and FeCl 3 (650 °C) are lower than the temperatures in the steel plant (1000–2000 °C).…”

Section: Resultsmentioning

confidence: 99%

“…64 Source materials for sintering contain several hundred g/t of Cl. 65 In addition, the boiling temperatures of Hence, some amount of Fe can evaporate as Fe chloride during the steel production. Although Fe chlorides were not detected in the XAFS and morphological analyses, Fe chlorides possibly react with water or oxygen to finally form Fe (hydr)oxides under high-temperature conditions.…”

Section: ■ Introductionmentioning

confidence: 99%

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Stable Isotope Ratios of Combustion Iron Produced by Evaporation in a Steel Plant

Kurisu

Adachi

Sakata

et al. 2019

ACS Earth Space Chem.

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Combustion iron (Fe) in aerosols is one of the sources of dissolved Fe in the surface ocean. The iron isotope ratio (δ 56 Fe) is an important tool for source apportionment of Fe because combustion Fe emitted by evaporation possibly yields lower δ 56 Fe values than natural materials. However, there are insufficient data of δ 56 Fe for combustion Fe. Hence, δ 56 Fe values of Fe emitted from a steel plant were investigated, and the representative δ 56 Fe value of combustion Fe was discussed. The presence of a large number of submicron spherical Fe oxide particles suggested that the particles were emitted by hightemperature evaporation. Fine particles yielded much lower δ 56 Fe (as low as −3.53‰) than original materials, indicating that Fe isotope fractionation occurred during evaporation. Based on this study and our previous data, we suggest −3.9‰ to −4.7‰ as the representative δ 56 Fe range of combustion Fe. Mass balance calculations using this range suggest that the contribution of combustion Fe is approximately 57−83% of the total soluble Fe in aerosols in the northwest Pacific, implying a large contribution of combustion Fe. The remarkably low δ 56 Fe value of combustion Fe emitted by evaporation enables us to evaluate its contribution to marine aerosols and to understand Fe cycles in the surface ocean.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Stable Isotope Ratios of Combustion Iron Produced by Evaporation in a Steel Plant

Kurisu

Adachi

Sakata

et al. 2019

ACS Earth Space Chem.

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“…One of these aforementioned methods is the roasting process of the ore. During this process, trace elements like arsenic, cadmium, selenium, tellurium, and antimony vaporize as volatile oxides and are collected to gain the raw element in further treatment. Figure gives the concentrations of trace elements in magnetite. , In comparison, the concentrations of the elements in the analyzed firewood ashes are given. Al is contained in magnetite in concentrations between 30 and 5000 mg kg –1 .…”

Section: Discussionmentioning

confidence: 99%

“…Figure 8 gives the concentrations of trace elements in magnetite. 52,53 In comparison, the concentrations of the elements in the analyzed firewood ashes are given. Al is contained in magnetite in concentrations between 30 and 5000 mg kg −1 .…”

Section: Trace Elements In Woodmentioning

confidence: 99%

Trace Element Concentrations in Firewood and Corresponding Stove Ashes

et al. 2019

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The combustion of natural untreated wood in firewood stoves generates ashes with high contents of minor and trace elements. Those ashes can be disposed via garbage collection. Those ashes can also be used as a fertilizer. This study investigates the elemental composition of four natural untreated wood species (beech, oak, spruce, and fir) and their ashes produced in a firewood stove. In total, 30 minor and trace elements were analyzed using inductively coupled plasma-optical emission spectroscopy. With a complete set of fuel and ash data, possible effects of ashes from untreated wood on the environment are discussed. They contain nutrients in concentrations so that ashes are comparable to commercial fertilizers, but they also contain toxic trace elements in concentrations at or above limits given by relevant German legislation. However, the trace elements are not only potentially harmful but also valuable. Therefore, ashes are also valuable in terms of an urban mining prospectus because they do contain certain elements in comparable concentrations as commercially used ores. It is therefore necessary to separate the trace elements from the ash matrix before it is put on soil, and the separated trace elements need to be processed to crude materials for demanded rare earth elements.

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“…90 To describe partitioning of TEs between products and plant emissions in an iron ore sinter plant in Brazil, Lau et al established the mass balance. 91 In addition, EFs and annual global Hg emissions (∼300 t to the atmosphere) through amalgamation at gold and silver mining sites were reviewed by Lacerda. 27 5.2.…”

Section: Emission By Source Categories and Te Speciesmentioning

confidence: 99%

Present Knowledge and Future Perspectives of Atmospheric Emission Inventories of Toxic Trace Elements: A Critical Review

Bai

Tian

Zhu

et al. 2023

Environ. Sci. Technol.

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Toxic trace elements (TEs) can pose serious risks to ecosystems and human health. However, a comprehensive understanding of atmospheric emission inventories for several concerning TEs has not yet been developed. In this study, we systematically reviewed the status and progress of existing research in developing atmospheric emission inventories of TEs focusing on global, regional, and sectoral scales. Multiple studies have strengthened our understanding of the global emission of TEs, despite attention being mainly focused on Hg and source classification in different studies showing large discrepancies. In contrast to those of developed countries and regions, the officially published emission inventory is still lacking in developing countries, despite the fact that studies on evaluating the emissions of TEs on a national scale or one specific source category have been numerous in recent years. Additionally, emissions of TEs emitted from waste incineration and traffic-related sources have produced growing concern with worldwide rapid urbanization. Although several studies attempt to estimate the emissions of TEs based on PM emissions and its source-specific chemical profiles, the emission factor approach is still the universal method. We call for more extensive and in-depth studies to establish a precise localization national emission inventory of TEs based on adequate field measurements and comprehensive investigation to reduce uncertainty.

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Characterization and mass balance of trace elements in an iron ore sinter plant

Cited by 17 publications

References 3 publications

Stable Isotope Ratios of Combustion Iron Produced by Evaporation in a Steel Plant

Stable Isotope Ratios of Combustion Iron Produced by Evaporation in a Steel Plant

Trace Element Concentrations in Firewood and Corresponding Stove Ashes

Present Knowledge and Future Perspectives of Atmospheric Emission Inventories of Toxic Trace Elements: A Critical Review

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