Advanced Powder Technology最新文献

{"title":"An effective strategy for converter slag and blast furnace dust by a deep self-reduction technology: Synergetic reaction and phase evolution behavior","authors":"Shanshan Wen ,&nbsp;Chaoyong Sun ,&nbsp;Sibo Shen ,&nbsp;Lihua Gao ,&nbsp;Junhong Zhang ,&nbsp;Zhijun He","doi":"10.1016/j.apt.2025.104950","DOIUrl":"10.1016/j.apt.2025.104950","url":null,"abstract":"<div><div>Advanced self-reduction roasting technology is a simple route for realizing the clean and synergetic utilization of hazardous blast furnaces and converter slag. However, the correlation between the crushing strength and metallization ratio of flux-metalized pellets has not been elucidated. This work clarified the consolidation behavior and synergetic mechanism in the preparation process of flux-metalized pellets. Through comprehensive optimization of process parameters, fluxed metalized pellets with a crushing strength of 3924 N/P, a metallization ratio of 86.54 % and a zinc recovery ratio of 90.35 % were successfully produced under the following optimal conditions: a reduction temperature of 1200 °C, a reduction time of 60 min, a basicity of 1.25 and an FC/O of 0.9, which meets the requirements for raw materials in blast furnace production. The reduction behavior of zinc ferrite Zn_xFe_3-xO₄ and stirlingite ZnFeSiO₄ played a crucial role in the preparation of pellets. During the reduction process of Zn_xFe_3-xO₄, Zn_xFe_3-xO₄ was initially reduced to wustite Zn_yFe_1-yO and then further reduced to metallic iron and zinc. During the reduction process of ZnFeSiO₄, olivine-type Zn_xFe_2-xSiO₄ could combine with CaO to form stable olivine CaSiO₄ under the action of CaO flux, in which the participation of CaO could effectively decrease the reduction activation energy of FeZnSiO₄. In addition, Ca_yFe_2-ySiAl₂O₇ originated from the displacement reaction between Ca_xFe_1-xAl₂O₄, which has a spinel crystal structure, and Ca_xFe_2-xSiO₄, which has an olivine crystal structure. A deep self-reduction roasting technology was developed to provide technical support and theoretical guidance for the clean utilization of metallurgical solid waste resources.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 8","pages":"Article 104950"},"PeriodicalIF":4.2,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144242817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fabrication and electrochemical evaluation of nano-silicon anode materials for energy storage application","authors":"Liao Juan,&nbsp;Tao Meixian,&nbsp;Wang Canxu,&nbsp;Zhang Tianxiang,&nbsp;Zhang Ruibo,&nbsp;Jiang Qi","doi":"10.1016/j.apt.2025.104963","DOIUrl":"10.1016/j.apt.2025.104963","url":null,"abstract":"<div><div>In order to solve the inherent low conductivity and the volume expansion problems of the silicon anode material, a modified precipitation method using polyvinyl alcohol as the surfactant was developed to prepare nano-scale silicon particle anode materials in this paper. First, the nano-silica particles were prepared by controlling the surfactant content. Then they were reduced to nano-silicon particles by the magnesium thermal reduction method. The obtained samples were characterized by XRD, Raman, SEM, nitrogen adsorption and desorption and electrochemical performance tests. The results showed that the obtained nano-silicon particles were uniform in size and the average particle size was about 46 nm. Their initial discharge specific capacity was 2653 mAh·g⁻¹ at 500 mA·g⁻¹ and the relative initial coulomb efficiency was 90.3 %. Moreover, they still had a large discharge capacity of 1478 mAh·g⁻¹ after 100 cycles at 500 mA·g⁻¹. Even at a large current density of 2000 mA·g⁻¹, they still retained a high specific capacity of 816 mAh·g⁻¹, showing excellent cycle performance and rate capability.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 8","pages":"Article 104963"},"PeriodicalIF":4.2,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144242818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of ultrasonic vibration frequency on the quality of produced NiTi and NiTi-20Hf powders for additive manufacturing applications","authors":"Mahyar Sojoodi,&nbsp;Alireza Behvar,&nbsp;Ahu Celebi,&nbsp;Nasrin Taheri Andani,&nbsp;Mohammad Pourshams,&nbsp;Mohammad Elahinia","doi":"10.1016/j.apt.2025.104945","DOIUrl":"10.1016/j.apt.2025.104945","url":null,"abstract":"<div><div>The rapid expansion of additive manufacturing (AM) technologies has intensified the demand for high-quality metal powders and prompted the need for effective recycling solutions to address waste generation during production. This study investigates the impact of ultrasonic vibration frequencies (20 kHz and 40 kHz) in an Ultrasonic-Plasma Atomization (UPA) system on recycling NiTi and NiTi-20Hf pre-alloyed powders. The objective is to evaluate the effects of frequency variation on key material properties, including impurity levels, powder characterization, and microstructural homogeneity, to determine the suitability of the recycled powder for AM applications. The findings reveal that both vibration frequencies significantly influence the properties of the recycled powders. At 40 kHz, carbon impurities increased by 39 % in NiTi and 89 % in NiTi-20Hf, while oxygen contamination rose by approximately 150 % and 60 %, respectively, compared to the virgin powders. Similarly, at 20 kHz, carbon and oxygen impurities exhibited notable increases, albeit to a lesser extent. These increases are attributed to process-induced surface area changes, thermal oxidation, and equipment-related contamination. Despite the increase in impurities, the microstructural analysis, particle size distribution, and shape uniformity of the recycled powders demonstrated consistent properties, aligning with the quality requirements typically specified for AM feedstock, such as those outlined in standards like ASTM F3049 or equivalent guidelines. By addressing the challenges of impurity management and ensuring physical consistency, this research highlights the viability of ultrasonic recycling processes as a sustainable strategy to enhance material reuse and reduce resource dependency in the AM industry.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 8","pages":"Article 104945"},"PeriodicalIF":4.2,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144231019","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Engineering heterogeneous Z-scheme photocatalysts Fe-BTC/CuInS2/BiVO4 integrated with carbon quantum dots to enhance the efficiency of Cr(VI) reduction and RR-195 degradation under visible light","authors":"Nguyen Duc Hai ,&nbsp;Pham Thi Mai Huong ,&nbsp;Nguyen The Huu ,&nbsp;Nguyen Xuan Huy ,&nbsp;Vuong Thi Lan Anh ,&nbsp;Hoa T. Vu ,&nbsp;Huan V. Doan ,&nbsp;Manh B. Nguyen","doi":"10.1016/j.apt.2025.104938","DOIUrl":"10.1016/j.apt.2025.104938","url":null,"abstract":"<div><div>In this study, Fe-BTC/CuInS₂/BiVO₄ composites (with Fe-BTC content ranging from 10 to 30 wt%) were synthesized followed by the incorporation of carbon quantum dots (CQDs) to form FCB-CQD photocatalysts. The resulting materials exhibit several key advantages, including high surface area, large pore volume, small particle size, efficient visible light absorption, and improved charge transport properties. The integration of CQDs significantly enhanced charge separation and reduced electron–hole recombination. A Z-scheme charge transfer mechanism was proposed and validated, enabling the FCB-CQD photocatalysts to achieve highly efficient photocatalytic reduction of Cr(VI) to Cr(III) and degradation of Reactive Red 195 (RR-195) under visible light. The 20%FCB-CQD sample achieved removal efficiencies exceeding 98 % for both pollutants. Key operational parameters, such as catalyst dosage, pollutant concentration, pH, reactive species involvement, and photocatalyst stability, were systematically investigated. Electrochemical and optical characterizations were used to construct the band structure and elucidate the electron transfer pathway. Scavenger experiments confirmed the dominant active species involved in each process, providing insight into the underlying photocatalytic mechanisms. These findings demonstrate the promising potential of FCB-CQD as an efficient and reusable photocatalyst for environmental remediation applications.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 8","pages":"Article 104938"},"PeriodicalIF":4.2,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144212555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of local erosion on flow pattern and particle self-rotation in a cyclone separator","authors":"Jianbo Zhao ,&nbsp;Xiuxun Hao ,&nbsp;Xiaohan Guo ,&nbsp;Fei Gao ,&nbsp;Junling Fan ,&nbsp;Pan Zhang ,&nbsp;Guanghui Chen","doi":"10.1016/j.apt.2025.104949","DOIUrl":"10.1016/j.apt.2025.104949","url":null,"abstract":"<div><div>Erosion is an inevitable problem of cyclone separator, and serious erosion will greatly affect the movement of the particles. To improve the understanding of the particle self-rotation in cyclone separator, in this research, we explored the influence of local wall erosion on local vortices and particle self-rotation in cyclone separators, leveraging coupled CFD and DEM simulations. The numerical results show that as erosion thickness grows in the cylinder, particle self-rotation decreases. Particles are prone to aggregation within the cone, which significantly affects their self-rotation speed. When the erosion thickness is only 2 mm or 5 mm, the slight deformation of the wall surface helps break up particle agglomeration, thereby increasing the particle self-rotation speed. However, when the erosion thickness reaches 10 mm or 15 mm, severe wear and deformation create deeper grooves, which promote particle aggregation (the particle self-rotation speed decreases by 7.2 % and 19.9 % respectively, compared to the cyclone separator without wear). Meanwhile, the larger erosion thickness spawns local vortices that alter particle motion trajectory and make them more likely to be captured by internal quasi-forced vortex.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 7","pages":"Article 104949"},"PeriodicalIF":4.2,"publicationDate":"2025-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144185152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An effective strategy for synthesizing spinel NixMn1-xFe2O4 by oxidation roasting technology: Synergetic reaction and phase evolution behavior","authors":"Jiaqi Wen ,&nbsp;Chenghong Liu ,&nbsp;Lihua Gao ,&nbsp;Zhijun He","doi":"10.1016/j.apt.2025.104951","DOIUrl":"10.1016/j.apt.2025.104951","url":null,"abstract":"<div><div>An oxidation roasting technology has been reported as an effective technology for successfully synthesizing nickel manganese ferrite Ni_xMn_1-xFe₂O₄ (0 &lt; x &lt; 1) with a spinel crystal structure. The experimental results demonstrated the successful synthesis of nickel manganese ferrite Ni_0.5Mn_0.5Fe₂O₄ samples with relatively high purities at an oxidation roasting temperature of 1200 °C for 2 h with a Ni:Mn:Fe molar ratio of 1:1:4. The synthesized samples exhibited a magnetization saturation (Ms) value of 53.71 emu/g, a coercivity (Hc) value of 34.88 Oe, and a remanent magnetization (Mr) of 3.64 emu/g. Additionally, these samples had a total pore volume of 0.071 cm³/g, a Specific Surface Area (SSA) of 24.13 cm²/g, and an Average Particle Size (APS) of 12.32 nm. It was concluded that the synthesis route of Ni_xMn_1-xFe₂O₄ could be theoretically summarized into two routes. One route involves the simultaneous substitution of divalent iron (Fe²⁺) and trivalent iron (Fe³⁺) in the spinel structure of (Fe)[Fe]₂O₄ by divalent manganese ions (Mn²⁺) and trivalent nickel ions (Ni³⁺), resulting in the formation of (Mn)_x(Fe)_1-x[Ni]_y[Fe]_2-yO₄ with a spinel crystal structure. In this structure, the Ni³⁺ ions preferentially occupy the octahedral sites, whereas the Mn²⁺ ions predominantly reside in the tetrahedral sites of the nickel manganese ferrites (Mn)_x(Fe)_1-x[Ni]_y[Fe]_2-yO₄. Furthermore, the mixed spinel crystal structure of (Ni)_y(Fe)_1-y[Mn]_x[Fe]_2-xO₄ could be transformed into nickel manganese ferrite (Mn)_x(Fe)_1-x[Ni]_y[Fe]_2-yO₄ under the influence of a higher oxidization roasting temperature. Nickel manganese ferrite Ni_xMn_1-xFe₂O₄ (0 &lt; x &lt; 1) with normal and inverse spinel structures inevitably coexists and co-transformed in the synthesis process of Ni_xMn_1-xFe₂O₄ by oxidation roasting technology.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 7","pages":"Article 104951"},"PeriodicalIF":4.2,"publicationDate":"2025-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144178589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of liquid nitrogen cold soaking on the pore structure and fractal characteristics during in situ leaching of sandstone uranium ores","authors":"Leiming Wang ,&nbsp;Liang Cheng ,&nbsp;Shenghua Yin ,&nbsp;Wei Chen ,&nbsp;Shuo Li ,&nbsp;Chao Zhang ,&nbsp;Senmiao Xue ,&nbsp;Jian Yang ,&nbsp;Yun Zhou ,&nbsp;Jinglin Xu ,&nbsp;Lujing Zheng ,&nbsp;Cunbao Li ,&nbsp;Yafei Hu","doi":"10.1016/j.apt.2025.104943","DOIUrl":"10.1016/j.apt.2025.104943","url":null,"abstract":"<div><div>In this study, a green and efficient liquid nitrogen fracturing method was explored. Sandstone uranium ore was first treated with liquid nitrogen cold soaking, followed by an analysis of the evolution of its pore and fracture structure using Low temperature nitrogen adsorption(LTNA), Nuclear magnetic resonance (NMR), and Scanning electron microscopy (SEM). The fractal characteristics of the pore structure and its evolution mechanism were also examined.The results show that gas adsorption in the ore increased with longer cold soaking times and more cycles.The highest nitrogen adsorption capacity was observed at a soaking time of 180 min, reaching 15.8556 cm³/g. Additionally, after 15 freezing cycles, the nitrogen adsorption capacity reached 14.8818 cm³/g. The proportion of micropores decreased, while mesopores and macropores increased. Specifically, after 180 min of liquid nitrogen soaking, micropores decreased by 9.59 %, mesopores increased by 7.79 %, and macropores increased by 1.8 %. After 15 cycles, micropores decreased by 10.55 %, mesopores increased by 6.38 %, and macropores increased by 4.17 %. SEM observations confirmed that the liquid nitrogen treatment expanded existing pores and cracks, and generated new fractures.Fractal dimension analysis revealed that liquid nitrogen treatment reduced the fractal dimension of the ore.This study effectively improves permeability and promotes uranium leaching in sandstone ores.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 7","pages":"Article 104943"},"PeriodicalIF":4.2,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144170409","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Alkaline-earth metal-doped In2O3 microtubes: a simple and efficient approach for detection of ppb-level formaldehyde gas","authors":"Wenjing Wu ,&nbsp;Jing Li ,&nbsp;Bo Hong ,&nbsp;Jingcai Xu ,&nbsp;Xiaoling Peng ,&nbsp;Hongwei Chen ,&nbsp;Shi Qiu ,&nbsp;Nan Zhang ,&nbsp;Xinqing Wang","doi":"10.1016/j.apt.2025.104948","DOIUrl":"10.1016/j.apt.2025.104948","url":null,"abstract":"<div><div>Metal doping has been widely acknowledged as a<!--> <!-->facile yet impactful approach to optimize the gas-sensing performance of metal oxide semiconductors. In this study, stable-valence alkaline-earth metals <strong>(</strong>Ca, Sr, and Ba) are incorporated into In₂O₃ microtubes to investigate the influence of ionic radius on formaldehyde gas-sensing performance. The results indicate that heterogeneous doping leads to a reduction in average grain size and bandgap, while concurrently increasing the specific surface area and the concentration of oxygen vacancies. The formaldehyde response values increase from 36.18 for In₂O₃ sensor, to 95.66 for In₂O₃-Ca sensor, to 107.93 for In₂O₃-Sr sensor, and up to 154.32 for In₂O₃-Ba sensor, correlating with the ionic radius of the doped-metals. The In₂O₃-Ba sensor notably demonstrates excellent selectivity toward formaldehyde, long-term stability, and a reduced operating temperature of 190 °C. The increase in ionic radius is associated with greater lattice distortion in the In₂O₃-Ba microtubes, a reduction in average grain size, and an elevated concentration of oxygen vacancies. Larger radius metal-doping significantly elevates oxygen vacancy density and chemisorbed oxygen content. Density functional theory calculations reveal that the adsorption energy for formaldehyde molecules on the In₂O₃-Ba sensor is the lowest at −1.75 eV. The enhanced vacancy and chemisorbed oxygen from acceptor Ba³⁺-doping into the n-type In₂O₃-Ba sensor facilitate the excellent gas-sensing performance, highlighting the contribution of the large-radius acceptor-doping to the high-performance In₂O₃ gas sensor.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 7","pages":"Article 104948"},"PeriodicalIF":4.2,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144170492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparative CFD study on regional drug deposition of Breezhaler® and Handihaler® in the human respiratory tract","authors":"Lixing Zhang ,&nbsp;Gang Guo ,&nbsp;Zhenbo Tong ,&nbsp;Ya Zhang ,&nbsp;Aibing Yu ,&nbsp;Changhui Li","doi":"10.1016/j.apt.2025.104935","DOIUrl":"10.1016/j.apt.2025.104935","url":null,"abstract":"<div><div>Inhalation therapy has become a cornerstone in the management of chronic respiratory diseases such as chronic obstructive pulmonary disease (COPD) and asthma. Among various devices, Breezhaler® and Handihaler® are two widely used dry powder inhalers (DPIs) in clinical practice. However, due to differences in structural design and aerodynamic characteristics, these devices exhibit markedly different drug deposition patterns within the respiratory tract. Currently, there is a lack of comprehensive comparative studies investigating their deposition efficiency and underlying mechanisms across distinct regions of the airway. To address this gap, the present study employs CFD-DPM approach to evaluate and compare the deposition and distribution behavior of Breezhaler® and Handihaler® in the MT, TB, and deep lung regions under five pressure drop levels and four particle size conditions. The results indicate that Breezhaler® features a more streamlined internal structure, allowing the airflow to maintain higher and more uniform velocities. In contrast, Handihaler® generates lower overall airflow speeds and exhibits greater velocity gradients and localized turbulence within the oral cavity. For both devices, oral deposition rates increase with rising pressure drops and particle sizes, with Handihaler® consistently showing higher oral deposition, particularly under elevated flow and particle size conditions. In the TB region, Breezhaler® demonstrates superior deposition efficiency compared to Handihaler®. Enhancing TB deposition with Breezhaler® can be achieved by utilizing smaller particle sizes, while Handihaler® can improve TB deposition efficiency even with larger particles by operating under lower pressure drops. Furthermore, Handihaler® shows better performance in drug delivery to the deep lung region.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 7","pages":"Article 104935"},"PeriodicalIF":4.2,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144154507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mechanism of a new combined collector for efficient flotation separation of cassiterite and calcite","authors":"Yonghong Xu ,&nbsp;Lingyun Huang ,&nbsp;Mei Zhang ,&nbsp;Jianhan Zhou ,&nbsp;Bo Hu ,&nbsp;Louyan Shen ,&nbsp;Jian Liu ,&nbsp;Dandan Wu ,&nbsp;Siyuan Yang","doi":"10.1016/j.apt.2025.104942","DOIUrl":"10.1016/j.apt.2025.104942","url":null,"abstract":"<div><div>The challenging separation of cassiterite from calcite by flotation stems from their similar floatability, requiring innovative combined collectors to improve process efficiency and selectivity. Here, a novel PTPA/FeCl₃ collector was developed by synthesizing p-<em>tert</em>-butylphenylhydroxamic acid (PTPA) with FeCl₃. Microflotation tests showed that using PTPA alone yielded 81.80% SnO₂ and 45.87% CaO recoveries, whereas PTPA/FeCl₃ increased SnO₂ recovery to 89.51% while reducing CaO to 27.02%, demonstrating superior separation efficiency. Contact angle measurements confirmed enhanced cassiterite hydrophobicity from the mixed collector. SEM-EDS and XPS analyses revealed effective chemisorption of PTPA/FeCl₃ on cassiterite, where PTPA and FeCl₃ formed a stably adsorbed chelate complex. In contrast, calcite exhibited weak and unstable adsorption. The mixed collector thus combines strong collecting capability with high selectivity for cassiterite over calcite.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 7","pages":"Article 104942"},"PeriodicalIF":4.2,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144154506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}