Wang Long, Chen Changfeng, Li Zongxu, Lyu Weijian, Liu Xuejing, Wang Hao, Nie Yimiao, Wang Ling, Liu Shuxian, Xue Na
College of Mining Engineering, North China University of Science and Technology, Tangshan 063210, China; Hebei Industrial Technology Institute of Mine Ecological Remediation, Tangshan 063210, China; Collaborative Innovation Center of Green Development and Ecological Restoration of Mineral Resources, Tangshan 063210, China.
College of Mining Engineering, North China University of Science and Technology, Tangshan 063210, China.
Ultrason Sonochem. 2025 Jul 30;120:107489. doi: 10.1016/j.ultsonch.2025.107489.
Blast furnace dust (BFD) represents a significant processing residue in the steel manufacturing. The clean and efficient utilization of BFD could not only alleviate zinc resource shortage but also hold great significance for the resource recycling of steel enterprises. This study investigated the behavior and kinetics of zinc leaching from BFD with crotonic acid as a novel reagent under ultrasonic conditions. Leaching experiments indicated that under the conditions of 240 W ultrasonic power, 1:8 g/mL solid-to-liquid (S/L) ratio, 1 mol/L crotonic acid concentration, 40 °C temperature, and 40 min, the ultrasonic leaching rates of zinc and iron were 92.79 % and 15.45 %. The leaching kinetic analysis demonstrated that the ultrasonic-assisted leaching process and the regular leaching process were governed by mixed control and chemical reaction control, respectively. The characterization analysis indicated that ultrasonic action could break the particle agglomerates into smaller fragments and create fissures. This enabled crotonic acid to react with BFD particles to a greater extent, thus facilitating the selective leaching of zinc. The results of Density Functional Theory (DFT) demonstrated that compared with FeO, crotonic acid was more prone to be adsorbed on the surface of ZnO. Additionally, it reacted with metal atoms through the oxygen atoms in the carboxyl group. The experimental outcomes provided conceptual guidance for achieving cost-effective extraction of zinc resources from BFD.
高炉粉尘（BFD）是钢铁制造过程中一种重要的加工残渣。BFD的清洁高效利用不仅可以缓解锌资源短缺问题，而且对钢铁企业的资源循环利用具有重要意义。本研究考察了以巴豆酸为新型试剂，在超声条件下从BFD中浸出锌的行为和动力学。浸出实验表明，在超声功率240W、固液比（S/L）1:8g/mL、巴豆酸浓度1mol/L、温度40℃、时间40min的条件下，锌和铁的超声浸出率分别为92.79%和15.45%。浸出动力学分析表明，超声辅助浸出过程和常规浸出过程分别受混合控制和化学反应控制。表征分析表明，超声作用可使颗粒团聚体破碎成更小的碎片并产生裂缝。这使得巴豆酸能够与BFD颗粒更充分地反应，从而促进锌的选择性浸出。密度泛函理论（DFT）结果表明，与FeO相比，巴豆酸更容易吸附在ZnO表面。此外，它通过羧基中的氧原子与金属原子发生反应。实验结果为从BFD中经济高效地提取锌资源提供了理论指导。
