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Iron-Iron Oxide Composites via Hydrogen Reduction of Mill Scale Followed by Spark Plasma Sintering 氢还原-等离子烧结铁-铁复合材料的研究
IF 2.3 4区 材料科学
JOM Pub Date : 2026-07-23 DOI: 10.1007/s11837-026-08583-0
Anupama Kashyap, Krishnakant Phand, Jagadeesh Neduri, Sai Ramudu Meka
{"title":"Iron-Iron Oxide Composites via Hydrogen Reduction of Mill Scale Followed by Spark Plasma Sintering","authors":"Anupama Kashyap,&nbsp;Krishnakant Phand,&nbsp;Jagadeesh Neduri,&nbsp;Sai Ramudu Meka","doi":"10.1007/s11837-026-08583-0","DOIUrl":"10.1007/s11837-026-08583-0","url":null,"abstract":"<div><p>The shift toward sustainable and low-carbon ironmaking has driven the need for innovative approaches. Key strategies include establishing a circular economy by recycling iron-rich waste (by-products) from steel production and using hydrogen (H<sub>2</sub>) as a clean reducing agent to minimize the CO<sub>2</sub> emissions. Mill scale from hot rolling mills during steelmaking is an attractive industrial waste due to its high iron content (about 72 wt.%) in the form of wustite (FeO), hematite (Fe<sub>2</sub>O<sub>3</sub>), and magnetite (Fe<sub>3</sub>O<sub>4</sub>). This study employs a one-step thermo-chemical treatment to partially reduce the mill scale to synthesize iron-iron oxide composites. The direct reduction of mill scale is carried out at 500℃ and 650°C for 90 min in flowing H<sub>2</sub> gas. Such partially reduced mill scale powder was then consolidated by spark plasma sintering. Detailed characterizations were carried out using X-ray diffraction, optical microscopy, and scanning electron microscopy of treated and untreated mill scale at various stages of the process, before and after compaction. A discussion of environmentally friendly hydrogen reduction as a process for converting mill scale into useful powder metallurgy steel products is presented.</p></div>","PeriodicalId":605,"journal":{"name":"JOM","volume":"78 9","pages":"8725 - 8737"},"PeriodicalIF":2.3,"publicationDate":"2026-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148782807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Hydrometallurgical Extraction of Aluminum and Rare-Earth Elements (REEs) from REE-Bearing Bauxite Ores: Recent Advances 湿法冶金从含稀土铝土矿中提取铝和稀土元素的研究进展
IF 2.3 4区 材料科学
JOM Pub Date : 2026-07-22 DOI: 10.1007/s11837-026-08504-1
Turan Uysal, Yayat Iman Supriyatna
{"title":"Hydrometallurgical Extraction of Aluminum and Rare-Earth Elements (REEs) from REE-Bearing Bauxite Ores: Recent Advances","authors":"Turan Uysal,&nbsp;Yayat Iman Supriyatna","doi":"10.1007/s11837-026-08504-1","DOIUrl":"10.1007/s11837-026-08504-1","url":null,"abstract":"<div><p>Rare-earth elements (REEs) are geologically widespread, but their mining and especially processing are concentrated in a small number of countries; as demand grows, some specific REEs may face supply shortages in the near future. Consequently, owing to their economic potential even at low concentrations, ability to provide alternative supply opportunities, and process development potential, various countries are conducting studies on REE production from secondary geological sources such as high-silica bauxite ore. This study provides a detailed examination of aluminum (Al) and REE recovery from bauxite ore, emphasizing sustainable utilization of these resources. In this context, the study presents the technological evaluation potential of these deposits in the context of modern demands, the acquisition process, and an analysis of the main technical difficulties in this process. Furthermore, the application of both mechanical and thermal activation methods in conjunction may prove more economically viable and environmentally sustainable by reducing the temperature requirements of fossil fuel-consuming heat treatment. The development of sustainable Al and REE recovery technology from bauxite ore is of significant importance, not only in terms of mitigating supply risk but also as an alternative source for REE production.</p></div>","PeriodicalId":605,"journal":{"name":"JOM","volume":"78 9","pages":"8427 - 8441"},"PeriodicalIF":2.3,"publicationDate":"2026-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11837-026-08504-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148783239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Research on Bronzes Unearthed at the Dayandun Site, China 中国大雁屯遗址出土青铜器研究
IF 2.3 4区 材料科学
JOM Pub Date : 2026-07-22 DOI: 10.1007/s11837-026-08513-0
Huang Huang, Yulong Wang, Yuchen Shi, Sheng Sun
{"title":"Research on Bronzes Unearthed at the Dayandun Site, China","authors":"Huang Huang,&nbsp;Yulong Wang,&nbsp;Yuchen Shi,&nbsp;Sheng Sun","doi":"10.1007/s11837-026-08513-0","DOIUrl":"10.1007/s11837-026-08513-0","url":null,"abstract":"<div><p>The Dayandun site is located in present-day Hefei, the capital of the Anhui Province. Its primary occupation dates from the late Western Zhou Dynasty to the spring and autumn periods (877–476 B.C.). Scientific studies on bronze artifacts in this region are scarce. In this study, we employed X-ray fluorescence spectrometry (XRF), metallographic analysis, scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDS) to investigate the alloy composition and lead isotope ratios of bronzes from Dayandun. Additionally, ion chromatography, ultra-depth-of-field microscopy, and X-ray diffraction (XRD) were used to analyze the soil and corrosion products adhering to the bronzes. The results indicate that the alloy composition of the bronzes is similar to that found in the Central Plains (the core cultural area of northern China), whereas the lead used in four artifacts likely originated from the lower Yangtze River region (southern China). Furthermore, although the burial environment was characterized by neutral soil, chloride ions, which are key contributors to “bronze disease,” were detected in both the patina and the surrounding soil. Therefore, future conservation efforts should prioritize the prevention of chloride-induced corrosion.</p></div>","PeriodicalId":605,"journal":{"name":"JOM","volume":"78 9","pages":"8455 - 8470"},"PeriodicalIF":2.3,"publicationDate":"2026-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148783443","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Elucidating the Influence of Defects in Different Crystal Structures on the Diffusion Rate of Hydrogen Atoms Under Applied Electric Fields 阐明外加电场作用下不同晶体结构缺陷对氢原子扩散速率的影响
IF 2.3 4区 材料科学
JOM Pub Date : 2026-07-22 DOI: 10.1007/s11837-026-08579-w
Rui Ma, Mengcheng Zhou, Xinfang Zhang
{"title":"Elucidating the Influence of Defects in Different Crystal Structures on the Diffusion Rate of Hydrogen Atoms Under Applied Electric Fields","authors":"Rui Ma,&nbsp;Mengcheng Zhou,&nbsp;Xinfang Zhang","doi":"10.1007/s11837-026-08579-w","DOIUrl":"10.1007/s11837-026-08579-w","url":null,"abstract":"<div><p>Understanding the interactions between hydrogen and metals with different crystal structures is crucial for developing materials for hydrogen storage and transport. This study uses molecular dynamics simulations to investigate how crystal structures and defect types influence hydrogen diffusion in iron and the effect of applied electric fields. The results show that the interaction between hydrogen and defects exhibits pronounced crystallographic specificity. In body-centered cubic iron, defects act as hydrogen traps, hindering the diffusion behavior of hydrogen atoms. Conversely, in face-centered cubic iron, defects serve as fast diffusion channels for hydrogen atoms, accelerating their diffusion. Under the action of an external electric field, the diffusion rate of hydrogen atoms in iron is accelerated. Therefore, this study provides new insights and solutions for designing new materials for hydrogen energy storage and transportation from the perspectives of crystal structure, defects, and applied electric fields.</p></div>","PeriodicalId":605,"journal":{"name":"JOM","volume":"78 9","pages":"8707 - 8724"},"PeriodicalIF":2.3,"publicationDate":"2026-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148783442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Design and Characterization of Solidified-Soil–Coal-Gangue Composites: Pore Structure Control and Enhanced Thermal Stability for Reclamation Applications 固化土-煤-矸石复合材料的设计与表征:孔隙结构控制和增强的热稳定性
IF 2.3 4区 材料科学
JOM Pub Date : 2026-07-22 DOI: 10.1007/s11837-026-08590-1
Kang Yang, Kuizhen Fang, Xiuping Hong, Ziyun Chi, Kai Zhang, Mengling Wu, Renhang Jia, Manyan Xiong, Shiwen Zhang
{"title":"Design and Characterization of Solidified-Soil–Coal-Gangue Composites: Pore Structure Control and Enhanced Thermal Stability for Reclamation Applications","authors":"Kang Yang,&nbsp;Kuizhen Fang,&nbsp;Xiuping Hong,&nbsp;Ziyun Chi,&nbsp;Kai Zhang,&nbsp;Mengling Wu,&nbsp;Renhang Jia,&nbsp;Manyan Xiong,&nbsp;Shiwen Zhang","doi":"10.1007/s11837-026-08590-1","DOIUrl":"10.1007/s11837-026-08590-1","url":null,"abstract":"<div><p>To address the high spontaneous combustion risk associated with the direct backfilling of coal gangue in mine reclamation, this study investigated the thermal stabilization effects of varying dosages of a solidified-soil (SS) material on coal gangue with different particle-size distributions. The thermal control behavior of SS in coal gangue reclamation was investigated using X-ray CT, thermogravimetry–differential scanning calorimetry, and in-situ Fourier-transform infrared spectroscopy, and a large-scale ecological backfilling method for coal gangue disposal has been proposed. At a gangue-to-SS mass ratio of 7:3, the composite exhibited a favorable balance between thermal stabilization performance and engineering cost. The SS effectively fills and seals the interstitial voids within the stacked gangue, modifying the apparent activation-energy profile during the endothermic heating stage, leading to reduced low-temperature mass-loss and thermal response intensity in the SS–gangue samples, thereby reducing the self-heating tendency of the coal gangue. One year after reclamation, the average temperature of the reconstructed SS–gangue layer at depths below 10 m was 10℃ lower than that of the directly backfilled gangue layer. These results provide a materials-based foundation for the application of SS–gangue composites in coal gangue reclamation. By regulating the pore structure and potentially limiting oxygen accessibility, these composites may help to mitigate self-heating risks.</p></div>","PeriodicalId":605,"journal":{"name":"JOM","volume":"78 9","pages":"8738 - 8754"},"PeriodicalIF":2.3,"publicationDate":"2026-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148783441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Effects of Cold Rolling Reduction Rate on the Microstructure and Mechanical Properties of Super Ferritic Stainless Steel S44660 冷轧压下率对超级铁素体不锈钢S44660组织和力学性能的影响
IF 2.3 4区 材料科学
JOM Pub Date : 2026-07-22 DOI: 10.1007/s11837-026-08546-5
Ziqiang Yuan, Yaohui Song, Yugui Li, Yibo Lu, Meitong Guo, Yuyang Jiang, Bin Wang
{"title":"The Effects of Cold Rolling Reduction Rate on the Microstructure and Mechanical Properties of Super Ferritic Stainless Steel S44660","authors":"Ziqiang Yuan,&nbsp;Yaohui Song,&nbsp;Yugui Li,&nbsp;Yibo Lu,&nbsp;Meitong Guo,&nbsp;Yuyang Jiang,&nbsp;Bin Wang","doi":"10.1007/s11837-026-08546-5","DOIUrl":"10.1007/s11837-026-08546-5","url":null,"abstract":"<div><p>This study provides a comprehensive analysis of the effects of cold rolling reductions (40–75%) on the deformation mechanisms, texture evolution, recrystallization behavior, and mechanical properties of super ferritic stainless steel (SFSS). The findings reveal that cold rolling deformation causes grain elongation along the rolling direction (RD), with shear bands preferentially nucleating within grains oriented along the <i>γ</i>-fiber ({111}//ND). The primary texture evolves from a mixed <i>α</i>-fiber ({001}//RD) and <i>γ</i>-fiber ({111}//ND) texture during cold rolling to a <i>γ</i>-fiber texture (with peak intensity at {111}&lt;112&gt;)) after annealing and recrystallization strengthening. High-temperature annealing (950°C) activates nucleation via shear-band-assisted recrystallization and subgrain coalescence, resulting in complete recrystallization after 30 min. In the cold rolling stage, dislocation strengthening predominates, whereas during recrystallization, solid-solution strengthening becomes the primary contributor to the material’s strength. The sample subjected to a 75% cold rolling reduction and annealed at 950°C for 30 min achieved a high tensile strength of 563 MPa, a yield strength of (MPa), and notable elongation of 35%.</p></div>","PeriodicalId":605,"journal":{"name":"JOM","volume":"78 9","pages":"8601 - 8613"},"PeriodicalIF":2.3,"publicationDate":"2026-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148783444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Thermodynamic Analysis of the Oxidation Roasting of Arsenopyrite 毒砂氧化焙烧的热力学分析
IF 2.3 4区 材料科学
JOM Pub Date : 2026-07-20 DOI: 10.1007/s11837-026-08563-4
Yan Zhang, Yulan Li, Qian Li, Shichao He, Yongbin Yang
{"title":"Thermodynamic Analysis of the Oxidation Roasting of Arsenopyrite","authors":"Yan Zhang,&nbsp;Yulan Li,&nbsp;Qian Li,&nbsp;Shichao He,&nbsp;Yongbin Yang","doi":"10.1007/s11837-026-08563-4","DOIUrl":"10.1007/s11837-026-08563-4","url":null,"abstract":"<div><p>This study performed a systematic thermodynamic analysis of FeAsS oxidation roasting by calculating the standard Gibbs free energy changes (Δ<sub>r</sub><i>G</i><sub>m</sub><sup>θ</sup>) for 56 possible reactions at 300–1200 K and simulating equilibrium compositions via the Reaction and Equilib modules in FactSage software. The results indicate that the pyrolysis of FeAsS is thermodynamically spontaneous. Oxidation reactions are thermodynamically more favorable than pyrolysis, with direct oxidation to Fe<sub>3</sub>O<sub>4</sub>/Fe<sub>2</sub>O<sub>3</sub> being preferred, whereas inappropriate conditions promote the formation of arsenates and sulfates that hinder de-arsenification. Equilibrium simulations further reveal that the de-arsenification ratio initially increases and then decreases with rising oxygen content, roasting temperature, and carbon addition. Under carbon-free conditions, the optimal de-arsenification efficiency of 80% is achieved at 700 K with an O<sub>2</sub>/FeAsS molar ratio of 2.7. The addition of carbon at a C/O<sub>2</sub>/FeAsS molar ratio of 13:150:50 significantly improves the de-arsenification ratio to 94.38%, as carbon facilitates the reduction of arsenates and sulfates to iron oxides and promotes the volatilization of As<sub>4</sub>O<sub>6</sub>(g). However, excessive carbon addition is detrimental due to competitive oxygen consumption. These findings provide a theoretical foundation for optimizing the oxidation roasting parameters of arsenopyrite, enabling efficient de-arsenification and improving gold recovery in industrial practice.</p></div>","PeriodicalId":605,"journal":{"name":"JOM","volume":"78 9","pages":"8283 - 8292"},"PeriodicalIF":2.3,"publicationDate":"2026-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148782692","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Eco-Utilization of Copper–Molybdenum Tailings in Cement: Characterization and Performance 水泥中铜钼尾矿的生态利用:表征与性能
IF 2.3 4区 材料科学
JOM Pub Date : 2026-07-20 DOI: 10.1007/s11837-026-08582-1
Ying Wang, Xiaowei Gu, Bohan Yang, Zhijun Li, Fengdan Wang, Qing Wang, Jianping Liu
{"title":"Eco-Utilization of Copper–Molybdenum Tailings in Cement: Characterization and Performance","authors":"Ying Wang,&nbsp;Xiaowei Gu,&nbsp;Bohan Yang,&nbsp;Zhijun Li,&nbsp;Fengdan Wang,&nbsp;Qing Wang,&nbsp;Jianping Liu","doi":"10.1007/s11837-026-08582-1","DOIUrl":"10.1007/s11837-026-08582-1","url":null,"abstract":"<div><p>This study reuses copper–molybdenum ore tailings (CMOTs) blended with metakaolin (MK) as supplementary cementitious materials (SCMs) for waste recycling and carbon reduction. Macroscopic and microscopic analyses demonstrate that the CMOTs possess high crystallinity with only 12.4% amorphous phases, leading to weak pozzolanic reactivity and a limited filler effect. The incorporation of the CMOTs significantly reduces the 7-day and 28-day compressive strength of cement, which slightly inhibits the hydration of C<sub>3</sub>S but promotes the hydration of C<sub>2</sub>S. As an effective modification material, MK can prominently improve the early strength of CMOT-blended cement. Specifically, when the MK dosage is 10% and 20%, the 7-day compressive strength of the blended cement reaches 34.88 MPa and 37.09 MPa, respectively. However, MK remarkably restrains the growth of compressive strength and the formation of bound water in CMOT -blended cement during the curing period of 7–28 days. Considering the positive modification effect of MK and the inherent hydration characteristics of cement clinker, the MK dosage in CMOT -blended cement needs to be optimized to a moderate level. Overall, the collaborative application of the CMOTs and MK in cement formulas can reduce the global warming potential by up to 20% and cut production costs by a maximum of 13%.</p></div>","PeriodicalId":605,"journal":{"name":"JOM","volume":"78 10","pages":"9323 - 9336"},"PeriodicalIF":2.3,"publicationDate":"2026-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149027701","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Enhanced Leaching of Aluminum in Aluminum Dross After Reconstructing Al2O3 into Calcium Aluminate by Calcination with CaO CaO煅烧将Al2O3重构为铝酸钙后,铝渣中铝的浸出率提高
IF 2.3 4区 材料科学
JOM Pub Date : 2026-07-20 DOI: 10.1007/s11837-026-08580-3
Hanlin Shen, Jun Liu, Dongjie Luo, Junjie Zhang, Xiaoyan Zhang, Bo Liu
{"title":"Enhanced Leaching of Aluminum in Aluminum Dross After Reconstructing Al2O3 into Calcium Aluminate by Calcination with CaO","authors":"Hanlin Shen,&nbsp;Jun Liu,&nbsp;Dongjie Luo,&nbsp;Junjie Zhang,&nbsp;Xiaoyan Zhang,&nbsp;Bo Liu","doi":"10.1007/s11837-026-08580-3","DOIUrl":"10.1007/s11837-026-08580-3","url":null,"abstract":"<div><p>Aluminum dross (AD) is a solid waste containing Al<sub>2</sub>O<sub>3</sub> from aluminum recycling. Leaching of aluminum to make <i>γ</i>-Al<sub>2</sub>O<sub>3</sub> powder is a promising method for recycling AD. However, the aluminum is hard to be leached out due to the high chemical resistance of Al<sub>2</sub>O<sub>3</sub>. In this work, a calcination treatment with CaO was applied on AD to reconstruct the Al<sub>2</sub>O<sub>3</sub> into calcium aluminate, which possessed a high chemical reactivity. Reconstruction reaction was consisted of the following steps. The CaO was dissociated into Ca<sup>2+</sup>, which was absorbed on the surface of the Al<sub>2</sub>O<sub>3</sub> unit cell with hexagonal close packing structure. The absorbed Ca<sup>2+</sup> penetrated and reconstructed the unit cell, followed by synthetizing the calcium aluminate. Leaching experiment was conducted on the AD and calcined AD. Apparent activation energy of the leaching reaction was decreased from 27.3 kJ/mol to 23.9 kJ/mol after calcination, and leaching rate of aluminum was increased from 72.2% to 85.8%, with NaOH concentration of 200 g/L, liquid–solid ratio of 12 mL/g, and 100°C for 4 h.</p></div>","PeriodicalId":605,"journal":{"name":"JOM","volume":"78 10","pages":"9311 - 9322"},"PeriodicalIF":2.3,"publicationDate":"2026-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149027616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Silica Recovery from Laterite Leach Residue by Alkaline Leaching and Acid Precipitation: A Kinetic Evaluation 碱浸酸沉法回收红土浸渣中二氧化硅的动力学评价
IF 2.3 4区 材料科学
JOM Pub Date : 2026-07-20 DOI: 10.1007/s11837-026-08548-3
Gyan Prameswara, Yohandri Bow, Himmah Sekar Eka Ayu Gustiana, Wahyu Budi Utomo, Fajriyati Mas’ud, Iga Trisnawati, Flaviana Yohanala Prista Tyassena, Muhammad Iqbal Al Fuady, Anerasari Meidinariasty, Dilia Puspa, Adi Syakdani, Putri Ilmi Sakinah,  Fadillah,  Yusdianto, Sri Diana, Dewi Purnama Sari, Himawan Tri Bayu Murti Petrus
{"title":"Silica Recovery from Laterite Leach Residue by Alkaline Leaching and Acid Precipitation: A Kinetic Evaluation","authors":"Gyan Prameswara,&nbsp;Yohandri Bow,&nbsp;Himmah Sekar Eka Ayu Gustiana,&nbsp;Wahyu Budi Utomo,&nbsp;Fajriyati Mas’ud,&nbsp;Iga Trisnawati,&nbsp;Flaviana Yohanala Prista Tyassena,&nbsp;Muhammad Iqbal Al Fuady,&nbsp;Anerasari Meidinariasty,&nbsp;Dilia Puspa,&nbsp;Adi Syakdani,&nbsp;Putri Ilmi Sakinah,&nbsp; Fadillah,&nbsp; Yusdianto,&nbsp;Sri Diana,&nbsp;Dewi Purnama Sari,&nbsp;Himawan Tri Bayu Murti Petrus","doi":"10.1007/s11837-026-08548-3","DOIUrl":"10.1007/s11837-026-08548-3","url":null,"abstract":"<div><p>The extraction of silica from atmospheric leaching (AL) residues of laterite ore presents an opportunity for resource valorization and waste minimization. This study investigates the alkaline leaching of silica from AL residues using sodium hydroxide (NaOH), optimizing process parameters through a Box–Behnken experimental design. The effects of temperature (30–90°C), NaOH concentration (1–5 mol/L), solid-to-liquid ratio (0.1–0.5 g/mL), and leaching duration (30–120 min) on silica leaching recovery were analyzed. The optimal conditions—84.31°C, 3.48 mol/L NaOH, 0.43 g/mL solid-to-liquid ratio, and 91.83 min—achieved a silica leaching recovery of 94.59%, while subsequent acid precipitation resulted in a precipitation recovery of 81.17%. Kinetic analysis using the shrinking core model (SCM) indicated that the process is diffusion-controlled through an ash layer, with an activation energy (Ea) of 9.065 kJ/mol. Thermodynamic analysis using Pourbaix diagrams confirmed the selective dissolution of Si while Fe precipitated as hydroxides. This study demonstrates the potential of AL residue as a secondary Si source, contributing to sustainable resource utilization and environmental management.</p></div>","PeriodicalId":605,"journal":{"name":"JOM","volume":"78 10","pages":"9294 - 9310"},"PeriodicalIF":2.3,"publicationDate":"2026-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149027611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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