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In Situ Observation of Inclusions Pinning Effect of Austenite Grain Growth in Fe−80Ni Permalloy With or Without Ce treatment 原位观察含或不含 Ce 处理的 Fe-80Ni 超耐热合金中奥氏体晶粒生长的夹杂钉扎效应
IF 2.1 4区 材料科学
JOM Pub Date : 2024-08-12 DOI: 10.1007/s11837-024-06759-0
Kean Yao, Yanwu Dong, Zhouhua Jiang, Yong Wang, Yushuo Li, Shuyang Du, Yuning Wu, Haibiao Qing
{"title":"In Situ Observation of Inclusions Pinning Effect of Austenite Grain Growth in Fe−80Ni Permalloy With or Without Ce treatment","authors":"Kean Yao,&nbsp;Yanwu Dong,&nbsp;Zhouhua Jiang,&nbsp;Yong Wang,&nbsp;Yushuo Li,&nbsp;Shuyang Du,&nbsp;Yuning Wu,&nbsp;Haibiao Qing","doi":"10.1007/s11837-024-06759-0","DOIUrl":"10.1007/s11837-024-06759-0","url":null,"abstract":"<div><p>The magnetic properties of Fe−80Ni alloy are significantly influenced by its microstructure, making it the focus of research. In this study, we investigated the pinning effect of inclusions on austenite grain growth in Fe−80Ni using high-temperature confocal laser scanning microscopy (HT-CLSM) and explored the impact of Ce treatment on the pinning process and magnetic properties of Fe−80Ni alloy. The findings revealed that primary inclusions were transformed into Ce-containing inclusions with Ce treatment. Moreover, the Ce treatment resulted in a certain reduction in the number of inclusions. Simultaneously, there was an enhancement in the level of inclusions after deformation and annealing with Ce treatment. The HT-CLSM results highlighted that these inclusions impede grain boundary migration, facilitating the formation of finer grains due to the pinning effect during the annealing process. Furthermore, a reduced number of inclusions led to a larger average grain size after annealing, from 152.3 μm to 170.2 μm, consequently improving the magnetic properties of the alloy by 10-20%. To assess the deformability of different inclusions, we calculated the Young's modulus, yielding values of 141.5 GPa for CeO<sub>2</sub> and 82.4 GPa for 6SiO<sub>2</sub>·Al<sub>2</sub>O<sub>3</sub>, respectively. Additionally, we elucidated the evolution of inclusion pinning during annealing based on TEM results.</p></div>","PeriodicalId":605,"journal":{"name":"JOM","volume":"76 10","pages":"5852 - 5865"},"PeriodicalIF":2.1,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142199444","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
Experimental Study on Collaborative Electric Furnace Dust Reduction with Multi-solid Waste in Steel Plants: Turning Waste into Treasure, Saving Energy and Reducing Emissions 利用钢铁厂多固体废物协同减少电炉粉尘的实验研究:变废为宝、节能减排
IF 2.1 4区 材料科学
JOM Pub Date : 2024-08-12 DOI: 10.1007/s11837-024-06798-7
Dongjie Zhou, Dianchun Ju, Zhuo Chen, Weitong Du, Jiayong Qiu, Shui Yu, Haiwei Yao, Rui Mao, Han Ma
{"title":"Experimental Study on Collaborative Electric Furnace Dust Reduction with Multi-solid Waste in Steel Plants: Turning Waste into Treasure, Saving Energy and Reducing Emissions","authors":"Dongjie Zhou,&nbsp;Dianchun Ju,&nbsp;Zhuo Chen,&nbsp;Weitong Du,&nbsp;Jiayong Qiu,&nbsp;Shui Yu,&nbsp;Haiwei Yao,&nbsp;Rui Mao,&nbsp;Han Ma","doi":"10.1007/s11837-024-06798-7","DOIUrl":"10.1007/s11837-024-06798-7","url":null,"abstract":"<div><p>Rotary hearth furnaces and rotary kilns are the mainstream methods for large-scale treatment of electric furnace dust (EAFD) in steel companies, but they require a large amount of energy and have low product quality. The roasting conversion–separation technology uses calcium oxide to promote the conversion of zinc–iron spinel in EAFD into zinc oxide and dicalcium ferrite, but adding calcium oxide additionally increases production costs. Converter sludge (OGS) is rich in iron oxides and valuable components such as CaO, CaCO<sub>3</sub>, ZnFe<sub>2</sub>O<sub>4</sub>, etc. The free calcium oxide and calcium carbonate can be used as substitutes for pure calcium oxide. This paper designed a multi-solid waste collaborative reduction roasting process to realize the recovery of zinc and iron elements from OGS and EAFD and explore the feasibility of industrial treatment in rotary hearth furnace. The results show that harmful OGS can be used as the calcium agent in the roasting process. The calcium carbonate in OGS not only improves the conversion of iron oxide into metallic iron, but the decomposed CaO can promote the conversion of zinc–iron spinel in OGS and improve the dezincification effect. Better conditions are: 60% OGS, <i>n</i><sub>C</sub>/<i>n</i><sub>O</sub> = 1.2, roasting temperature 1150°C, roasting for 25 min; zinc content in the reduction product is 0.21%, and metallization rate is 78.53%, which can be used as a high-quality substitute or coolant for scrap steel raw materials in the steelmaking process. This process can realize green and comprehensive utilization of EAFD and OGS and is expected to achieve industrialization.</p></div>","PeriodicalId":605,"journal":{"name":"JOM","volume":"76 10","pages":"5899 - 5909"},"PeriodicalIF":2.1,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142225743","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
Effect of Carbides on Interfacial Reactions Between Superalloy DZ40M and Ceramic Mold in Directional Solidification 碳化物对定向凝固过程中超合金 DZ40M 与陶瓷模具之间界面反应的影响
IF 2.1 4区 材料科学
JOM Pub Date : 2024-08-12 DOI: 10.1007/s11837-024-06775-0
XiaoYan Chen, ChengKang Qi, ZhiHui Li, Fei Li
{"title":"Effect of Carbides on Interfacial Reactions Between Superalloy DZ40M and Ceramic Mold in Directional Solidification","authors":"XiaoYan Chen,&nbsp;ChengKang Qi,&nbsp;ZhiHui Li,&nbsp;Fei Li","doi":"10.1007/s11837-024-06775-0","DOIUrl":"10.1007/s11837-024-06775-0","url":null,"abstract":"<div><p>During the directional solidification (DS) of superalloys, the active alloy elements react with the ceramic mold, deteriorating the surface quality and affecting the dimensional accuracy of the alloys. It is important to investigate the interfacial reactions between the alloy melt and ceramic mold and to investigate the effect of the interfacial reactions on the structures of the alloy. Superalloy DZ40M was prepared by DS technology, the microstructures and element distributions of the alloy and the alloy-ceramic interface were observed by a scanning electron microscope (SEM) equipped with an energy dispersive spectrometer (EDS), and the interfacial reactions were analyzed from a thermodynamic perspective. Carbides are important strengthening phases in the alloy. Interfacial reactions between the carbides and the ceramic mold were further investigated. The results show that the alloy structure mainly contains Co (Cr/Ni/Zr/Al/W/Ti) solid solution columnar crystals (Co<sub>ss</sub>), nearly continuously distributed Cr-enriched M<sub>7</sub>C<sub>3</sub>-type carbides as well as Ti/Zr/W-enriched MC-type carbides skeletal precipitates. The reactions between the Co<sub>ss</sub> and the ceramic mold were mild, with a reaction layer of about 20–40 μm thickness, while the reaction between the grain boundary precipitates and the ceramic mold was severe because of a high content of Cr in the M<sub>7</sub>C<sub>3</sub>-type carbides and the presence of active elements Ti and Zr in the MC-type carbides, with a reaction layer of about 50 μm thickness. In addition, almost no obvious penetration of the mold refractory was observed in the interior of the alloy, showing that the ceramic mold has a relatively stable performance in investment casting of superalloy DZ40M.</p></div>","PeriodicalId":605,"journal":{"name":"JOM","volume":"76 10","pages":"5889 - 5898"},"PeriodicalIF":2.1,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142225742","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
Lightweight CrxV0.5Nb0.5ZrTi Refractory High-Entropy Alloys: Microstructure and Mechanical Properties 轻质 CrxV0.5Nb0.5ZrTi 难熔高熵合金:显微结构和机械性能
IF 2.1 4区 材料科学
JOM Pub Date : 2024-08-12 DOI: 10.1007/s11837-024-06795-w
Lin Yang, Xuelei Yang, Cun Zhang, Chenxi Gu, Lu Wang
{"title":"Lightweight CrxV0.5Nb0.5ZrTi Refractory High-Entropy Alloys: Microstructure and Mechanical Properties","authors":"Lin Yang,&nbsp;Xuelei Yang,&nbsp;Cun Zhang,&nbsp;Chenxi Gu,&nbsp;Lu Wang","doi":"10.1007/s11837-024-06795-w","DOIUrl":"10.1007/s11837-024-06795-w","url":null,"abstract":"<div><p>This study investigated two lightweight Cr<sub><i>x</i></sub>V<sub>0.5</sub>Nb<sub>0.5</sub>ZrTi (<i>x</i> = 0.1 and 0.3) refractory high-entropy alloys to understand the relationship between phase composition, microstructure, and mechanical properties. The addition of Cr resulted in a transition from a single-phase BCC structure of the base alloy V<sub>0.5</sub>Nb<sub>0.5</sub>ZrTi to a multiphase structure comprising BCC and Cr-rich Laves phases in the Cr<sub><i>x</i></sub>V<sub>0.5</sub>Nb<sub>0.5</sub>ZrTi alloys. The microstructure exhibited a typical dendritic pattern, consisting of BCC dendrites and Cr-rich Laves interdendrites. The area fraction of the Cr-rich Laves phase increased from 5% to 28% with the increase in Cr content. This increase led to elevated yield strength values, rising from 1100 ± 20 MPa to 1330 ± 30 MPa. The primary mechanisms contributing to the mechanical properties were solid-solution strengthening from the BCC phase and the formation of a small amount of hard Laves phase. These mechanisms, combined with the low density of the alloys, resulted in an excellent combination of specific yield strength and plasticity in the Cr<sub>0.1</sub>V<sub>0.5</sub>Nb<sub>0.5</sub>ZrTi alloy. Specifically, it exhibited a specific yield strength of 180 MPa cm<sup>3</sup>/g and over 40% plastic strain without fracture. Overall, the study provides insights into the design and development of lightweight refractory high-entropy alloys with desirable mechanical properties for various engineering applications.</p></div>","PeriodicalId":605,"journal":{"name":"JOM","volume":"76 10","pages":"5991 - 6001"},"PeriodicalIF":2.1,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142225741","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
Investigating the Influence of Low-Intensity Pulsed Magnetic Fields on Microstructure Evolution and Mechanical Properties of A356 Aluminum Alloy 研究低强度脉冲磁场对 A356 铝合金微观结构演变和机械性能的影响
IF 2.1 4区 材料科学
JOM Pub Date : 2024-08-12 DOI: 10.1007/s11837-024-06797-8
Hao Pan, Yuxin Huang, Zhiqi Song, Meina Gong, Chen He, Yuhui Zhao, Yonglin Ma
{"title":"Investigating the Influence of Low-Intensity Pulsed Magnetic Fields on Microstructure Evolution and Mechanical Properties of A356 Aluminum Alloy","authors":"Hao Pan,&nbsp;Yuxin Huang,&nbsp;Zhiqi Song,&nbsp;Meina Gong,&nbsp;Chen He,&nbsp;Yuhui Zhao,&nbsp;Yonglin Ma","doi":"10.1007/s11837-024-06797-8","DOIUrl":"10.1007/s11837-024-06797-8","url":null,"abstract":"<div><p>This study explores the effects of varied pulsed magnetic field strengths (0 mT, 16 mT, and 80 mT) on the microstructure and mechanical properties of A356 aluminum alloy. Advanced characterization techniques including an electron universal stretching machine, metallographic microscope (OM), scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), and transmission electron microscopy (TEM), were employed. Key findings demonstrate a progressive enhancement in the alloy’s mechanical strength correlating with increased magnetic field intensities, achieving peak properties at 80 mT. This intensity level resulted in significant increases in tensile strength (27.35%), yield strength (19.05%), and elongation (9.23%) compared to the baseline (0 mT). SEM analyses reveal a marked improvement in both the quantity and size of eutectic Si under magnetic influence. EBSD outcomes show a notable shift in grain orientation disorder, with a clear preference emerging at the (111) crystal plane post 80 mT treatment. TEM examinations further confirm an uptick in Si particle numbers and Mg2Si phase precipitation at this intensity, indicating profound microstructural transformations induced by the magnetic field.</p></div>","PeriodicalId":605,"journal":{"name":"JOM","volume":"76 10","pages":"5876 - 5888"},"PeriodicalIF":2.1,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142199443","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
Influence of the Structural Mechanics and Surface Properties of Injectable Chitosan Methacrylate-Based Hydrogels for Autologous Chondrocyte Implantation 注射用壳聚糖甲基丙烯酸酯水凝胶的结构力学和表面特性对自体软骨细胞植入的影响
IF 2.1 4区 材料科学
JOM Pub Date : 2024-08-12 DOI: 10.1007/s11837-024-06790-1
Kirthana Mohan, Dipin Das, Lynda Velutheril Thomas
{"title":"Influence of the Structural Mechanics and Surface Properties of Injectable Chitosan Methacrylate-Based Hydrogels for Autologous Chondrocyte Implantation","authors":"Kirthana Mohan,&nbsp;Dipin Das,&nbsp;Lynda Velutheril Thomas","doi":"10.1007/s11837-024-06790-1","DOIUrl":"10.1007/s11837-024-06790-1","url":null,"abstract":"<div><p>Current strategies for autologous chondrocyte implantation explore the use of gel systems that have structural similarity to an extracellular matrix of cartilage tissue and can act as chondrocyte carriers. However, the major requirement is to address the challenge of maintaining the phenotype and bio-functionality of chondrocytes which often undergo dedifferentiation on expansion, and the appropriate mechanical properties of the matrix that can influence cell attachment and growth. Injectable gel systems are developed in this study by blending different ratios of methacrylated chitosan and polyethylene glycol diacrylate, and photocross-linking the system to attain a stable gel. We hypothesize a multiscale approach of evaluating various parameters like the physical and structural properties of the gel, its wettability and surface free energy and mechano-rheological properties along with the biological characterization (viability assay, collagen, and glycosaminoglycan estimation by immunostaining, biochemical analysis, and RT-PCR assay) of the gel in ascertaining its ideal matrix system. The study provides a correlation between the different parameters to arrive at the most optimum characteristic of an ideal gel system which is dependent not only on the elastic modulus and surface free energy properties of the matrix but also on the composition of the matrix and the phenotype and functionality of the encapsulated chondrocytes.</p></div>","PeriodicalId":605,"journal":{"name":"JOM","volume":"76 10","pages":"5713 - 5734"},"PeriodicalIF":2.1,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142199441","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 Composition of Graded Dental Zirconias 分级齿科氧化锆的成分
IF 2.1 4区 材料科学
JOM Pub Date : 2024-08-12 DOI: 10.1007/s11837-024-06791-0
Anvita Maharishi, Kenny Horkley, Daniel K. Unruh, Edward A. McLaren, Shane N. White
{"title":"The Composition of Graded Dental Zirconias","authors":"Anvita Maharishi,&nbsp;Kenny Horkley,&nbsp;Daniel K. Unruh,&nbsp;Edward A. McLaren,&nbsp;Shane N. White","doi":"10.1007/s11837-024-06791-0","DOIUrl":"10.1007/s11837-024-06791-0","url":null,"abstract":"<div><p>Zirconia dental ceramics have evolved from uniform blocks of 3 mol.% yttria (3Y) to strength- and color-graded blocks containing 3 mol.% and 5 mol.% components. Relatively little is known about the graded materials’ compositions and microstructures. Concerns have been raised about aging and degradation. This study investigated the microstructure, elemental composition, and phase content of different zones of strength- and color-graded zirconia blocks using scanning electron microscopy, x-ray fluorescence, and x-ray diffraction. Specimens were made from green-state blocks using CAD/CAM machining and sintering. Two strength- and color-graded zirconia materials had different grain sizes, elemental compositions, and phase contents between their top and bottom zones, these data being internally consistent as well as being broadly consistent with prior compositional physical property data. A color-graded zirconia material did not exhibit substantial differences between its top and bottom zones, consistent with expectations and previously published data. Modeling phase content for complex yttria-doped zirconia crystal systems with multiple heterogeneous crystal lattices from XRD data was inherently difficult, which may account for the ranges among previously published data; authors should describe detailed methodologies. Detailed compositional data at the scale of the microstructure is needed to relate composition to phase content, physical behavior, including crack evolution.</p></div>","PeriodicalId":605,"journal":{"name":"JOM","volume":"76 10","pages":"5735 - 5743"},"PeriodicalIF":2.1,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11837-024-06791-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142199445","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
Glycemic Marker Correlation with Collagen Denaturation and Non-Enzymatic Collagen Cross-Linking in Age-Associated Bone Resistance 血糖标志物与年龄相关性骨阻力中胶原变性和非酶胶原交联的相关性
IF 2.1 4区 材料科学
JOM Pub Date : 2024-08-12 DOI: 10.1007/s11837-024-06744-7
James Rosenberg, Vishnu Sundaresh, Jeremy Gililland, Afaf Osman, William Woolley, Claire Acevedo
{"title":"Glycemic Marker Correlation with Collagen Denaturation and Non-Enzymatic Collagen Cross-Linking in Age-Associated Bone Resistance","authors":"James Rosenberg,&nbsp;Vishnu Sundaresh,&nbsp;Jeremy Gililland,&nbsp;Afaf Osman,&nbsp;William Woolley,&nbsp;Claire Acevedo","doi":"10.1007/s11837-024-06744-7","DOIUrl":"10.1007/s11837-024-06744-7","url":null,"abstract":"<div><p>The primary clinical indicator of fracture risk among the elderly is low bone mass, yet it accounts for less than half of fractures in individuals over 50 years. Age is recognized to influence bone quality, affecting bone structure and properties. Previous research indicates that age diminishes tissue plasticity and toughness conferred by collagen, suggesting that age-related changes in the collagen environment may contribute to bone fragility. This study explores the relationship between age-related collagen impairment, specifically the accumulation of non-enzymatic collagen cross-linking and molecular collagen denaturation, and bone toughness in middle-aged and older patients (postmenopausal 50–70 years old and senile osteoporosis age &gt; 70 years old). Additionally, it examines the influence of blood glucose and HbA1c levels, as well as body mass index (BMI), on these factors. Despite not finding any differences in fracture toughness between groups, we found a significant correlation between hemoglobin A1c and collagen integrity (collagen denaturation and non-enzymatic cross-linking).</p></div>","PeriodicalId":605,"journal":{"name":"JOM","volume":"76 10","pages":"5684 - 5691"},"PeriodicalIF":2.1,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11837-024-06744-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142199446","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
Fundamental Research on Selective Pre-enrichment of Low-Grade Niobium Concentrate from Bayan Obo Mine Via Super Gravity 利用超重力对巴彦奥博矿低品位铌精矿进行选择性预富集的基础研究
IF 2.6 4区 材料科学
JOM Pub Date : 2024-08-12 DOI: 10.1007/s11837-024-06811-z
Jintao Gao, Rong Yuan, Xi Lan, Huanhuan Xu, Zhancheng Guo
{"title":"Fundamental Research on Selective Pre-enrichment of Low-Grade Niobium Concentrate from Bayan Obo Mine Via Super Gravity","authors":"Jintao Gao, Rong Yuan, Xi Lan, Huanhuan Xu, Zhancheng Guo","doi":"10.1007/s11837-024-06811-z","DOIUrl":"https://doi.org/10.1007/s11837-024-06811-z","url":null,"abstract":"<p>Bayan Obo is the second largest niobium deposit in the world, and has been developed and utilized as iron ore for a long time because of its low niobium content and complex mineral composition. During the high-temperature reduction process, the recovery rate of niobium is low, and most niobium cannot be effectively recovered and utilized. Therefore, a new technology of slag iron separation via super gravity and preconcentration of niobium is proposed in this paper. Firstly, the reduction conditions of niobium concentrate at different temperatures, <i>C</i>/<i>O</i>, and reduction time have been studied to explore the optimal reduction conditions. The results show that the reduction effect was the best at 1200°C, <i>C</i>/<i>O</i> = 1.2 and a reduction time of 60 min. Secondly, under optimal reduction conditions, the super gravity realizes the low-temperature separation of slag and iron. We then studied the effect of <i>C</i>/<i>O</i>, gravity coefficient, and centrifugal time on the super gravity separation of niobium concentrate. The niobium content in slag increased from 4.05% to 15.7%, and the recovery of Nb<sub>2</sub>O<sub>5</sub> reached 94.43%, which greatly improves the niobium grade and is beneficial to the deep processing of niobium concentrate.</p>","PeriodicalId":605,"journal":{"name":"JOM","volume":"14 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142199440","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
Research Progress on Comprehensive Recovery and Utilization of Gold-Bearing Tailings in China: A Review 中国含金尾矿综合回收与利用研究进展:综述
IF 2.6 4区 材料科学
JOM Pub Date : 2024-08-12 DOI: 10.1007/s11837-024-06788-9
Xueyi Guo, Jie Chang, Dong Li, Hong Qin, Yuxuan Wei, Jinxi Qiao, Lei Zhang
{"title":"Research Progress on Comprehensive Recovery and Utilization of Gold-Bearing Tailings in China: A Review","authors":"Xueyi Guo, Jie Chang, Dong Li, Hong Qin, Yuxuan Wei, Jinxi Qiao, Lei Zhang","doi":"10.1007/s11837-024-06788-9","DOIUrl":"https://doi.org/10.1007/s11837-024-06788-9","url":null,"abstract":"<p>The contradiction between supply and demand of gold resources in China has always existed, and the proportion of recovery gold in the gold total supply is increasing yearly. Many gold-bearing tailings are produced in the mining, dressing and smelting process of gold-bearing minerals, and they contain gold, silver and other valuable metals. This paper analyzes the gold resources in the world and China and the main types of gold ores in China. The supply of and demand for gold in the world and China are summarized respectively. The generation and mineralogical characteristics of cyanide tailings and pyrite cinder, which are two representative gold-bearing tailings in the metallurgical field, are summarized. The research progress and existing problems of recovery technology of gold and other valuable metals from gold-bearing tailings are systematically reviewed. Finally, the development trend of gold-bearing tailing comprehensive recovery technology is examined, and the appropriate treatment methods and strengthening measures are put forward according to different types of gold-bearing tailings. This paper aims to provide reference and guidance for the development of efficient and clean recovery methods for gold-bearing tailings.</p>","PeriodicalId":605,"journal":{"name":"JOM","volume":"41 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142199439","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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