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      Study on the Drying Kinetics of Zinc Smelting Iron Slag Assisted by Ultrasonic Waves

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          Abstract

          This study investigates the impact of ultrasonic treatment on the drying kinetics of zinc smelting iron slag. Through the Arrhenius equation, it was found that the reaction order of zinc smelting iron slag remains constant at 1/2 before and after ultrasonic treatment, indicating a proportional relationship between the reaction rate and the square root of the reactant concentration. Despite the increased drying rate of the iron slag due to ultrasonic pretreatment, the reaction order remains at 1/2. Additionally, it was observed that the drying kinetics of untreated iron slag aligns with the Wang and Singh model, while the drying kinetics of ultrasonically pretreated iron slag fits the Page model. The Page model facilitates the prediction of drying rate and drying time for ultrasonically pretreated iron slag, enabling the optimization of the drying process, enhancing efficiency, and comparing drying performance under different conditions. Using ultrasonic pretreatment, the subsequent drying process of iron slag can significantly shorten the time and save energy. These findings provide essential theoretical foundations for optimizing the drying process of zinc smelting iron slag.

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          Ultrasound freeze-thawing style pretreatment to improve the efficiency of the vacuum freeze-drying of okra ( Abelmoschus esculentus (L.) Moench) and the quality characteristics of the dried product

          Highlights • Ultrasound freeze-thawing pretreatments improved the vacuum freeze-drying. • Pretreatment reduced the drying time and energy consumption. • Pretreatment changed the microstructure to various extent. • Ultrasound pretreatment retained most of the quality characteristics. • Pretreatment had no effect on the function groups and structure of pectin.
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            Rotary kiln pyrolysis of straw and fermentation residues in a 3MW pilot plant – Influence of pyrolysis temperature on pyrolysis product performance

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              Environmental risks for application of iron and steel slags in soils in China: A review

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                Author and article information

                Journal
                ACS Omega
                ACS Omega
                ao
                acsodf
                ACS Omega
                American Chemical Society
                2470-1343
                04 January 2024
                16 January 2024
                : 9
                : 2
                : 2578-2584
                Affiliations
                []National Local Joint Laboratory of Engineering Application of Microwave Energy and Equipment Technology , Kunming, Yunnan 650093, China
                []Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology , Kunming, Yunnan 650093, China
                [§ ]Nanjing Greentown Real Estate Co Ltd. , Nanjing, Jiangsu 210000, China
                Author notes
                Author information
                https://orcid.org/0009-0005-2994-6216
                https://orcid.org/0000-0003-0672-1477
                https://orcid.org/0000-0003-3244-0142
                Article
                10.1021/acsomega.3c07344
                10795127
                61ec41a1-2e95-4c11-bfd7-4165e7358c18
                © 2024 The Authors. Published by American Chemical Society

                Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works ( https://creativecommons.org/licenses/by-nc-nd/4.0/).

                History
                : 23 September 2023
                : 20 December 2023
                : 29 November 2023
                Funding
                Funded by: Kunming University of Science and Technology, doi 10.13039/501100007301;
                Award ID: 202107AA110002
                Categories
                Article
                Custom metadata
                ao3c07344
                ao3c07344

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