Minerals Engineering最新文献_第10页

Separation of light rare earth ions from aqueous solution by shear-induced orderly dissociation coupling with ultrafiltration and phosphorylated chitosan as complexant 以超滤和磷酸化壳聚糖为络合剂，剪切诱导有序解离耦合分离水溶液中的轻稀土离子

IF 4.9 2区工程技术

Minerals Engineering Pub Date : 2025-04-30 DOI: 10.1016/j.mineng.2025.109362

Yuxin Chen , Jiajun Wang , Dandan Lu, Yunren Qiu

{"title":"Separation of light rare earth ions from aqueous solution by shear-induced orderly dissociation coupling with ultrafiltration and phosphorylated chitosan as complexant","authors":"Yuxin Chen , Jiajun Wang , Dandan Lu, Yunren Qiu","doi":"10.1016/j.mineng.2025.109362","DOIUrl":"10.1016/j.mineng.2025.109362","url":null,"abstract":"<div><div>Light rare earth ions (La(III), Ce(IV), and Nd(III)) were separated from an aqueous solution using a novel water-soluble polymer phosphorylated chitosan (PCS) as complexant by shear-induced orderly dissociation coupling with ultrafiltration (SIOD-UF). The optimized pH and P/RE (mass ratio of PCS to rare earth ions) for the rejection of rare earth ions by coupling with ultrafiltration (C-UF) were investigated, and the shear stabilities of PCS-RE complexes were also studied for the selective separation of mixed rare earths. The critical shear rate (<em>γ<sub>c</sub></em>) at which PCS-RE complexes begin to dissociate at pH 7.0 were 1.31 × 10<sup>5</sup>, 1.63 × 10<sup>5</sup>, and 1.81 × 10<sup>5</sup> s<sup>−1</sup> for La, Ce, and Nd complexes, respectively. It showed the sequence of shear stability was PCS-Nd > PCS-Ce > PCS-La, which is consistent with the analysis by the frontier molecular orbital theory. Highly selective separation of Ca(II), La(III), Ce(IV), and Nd(III) and the regeneration of PCS were successfully realized at one time by SIOD-UF. The results showed that the maximum separation coefficient <em>β</em><sub><em>Ca</em></sub><sub><em>/La</em></sub>, <em>β<sub>La/Ce</sub></em>, and <em>β<sub>Ce/Nd</sub></em> reached 57.1 37.1 and 20.4, respectively, and the complexation property of regenerated PCS only a little loss compared with the original after 10 times cycles.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"228 ","pages":"Article 109362"},"PeriodicalIF":4.9,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143891397","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}

引用次数: 0

Assessing surface-level processes during column leaching: A spatiotemporal and multilevel approach combining XPS and SEM-EDS 评估柱淋溶过程中的地表水平过程：结合XPS和SEM-EDS的时空和多层次方法

IF 4.9 2区工程技术

Minerals Engineering Pub Date : 2025-04-30 DOI: 10.1016/j.mineng.2025.109359

Gonzalo Larrabure , Andrew Batchelor , Luis Salinas-Farran , Stephen J. Neethling , Pablo R. Brito-Parada

{"title":"Assessing surface-level processes during column leaching: A spatiotemporal and multilevel approach combining XPS and SEM-EDS","authors":"Gonzalo Larrabure , Andrew Batchelor , Luis Salinas-Farran , Stephen J. Neethling , Pablo R. Brito-Parada","doi":"10.1016/j.mineng.2025.109359","DOIUrl":"10.1016/j.mineng.2025.109359","url":null,"abstract":"<div><div>Surface-level processes play a significant role during leaching. However, few studies have been devoted to studying the surface of samples as part of column leaching experiments. This study proposes a methodology to access information from the surface-level processes that occur during column leaching, aiming to aid the design of economically and environmentally sustainable heap leaching operations. The methodology combines the use of X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy with energy dispersive spectroscopy (SEM-EDS) to investigate changes occurring at the surface. These two techniques have different surface sensitivities and thus allow the tracking of surface changes spatially (at different depths) and temporally (throughout the leaching period). The methodology also considers dividing a leaching column into a group of columns arranged in series. This allows extracting solid and solution samples from separate locations within the system without disrupting the process, thus yielding more information from a single experiment.</div><div>A case study of the proposed methodology is presented, for which a simulated bioleaching column experiment of a low-grade chalcopyrite ore was performed. The case study illustrates the usefulness of combining the two surface techniques, as their different surface sensitivities allowed the detection of two layers forming over the surface of the sample: (1) an intermediate layer rich in sulphates (later confirmed to be mostly jarosite) and (2) a thin surface layer rich in silicon (seemingly silica gel).</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"228 ","pages":"Article 109359"},"PeriodicalIF":4.9,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143891396","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}

引用次数: 0

Influence of the impeller structure and operating parameters of a high intensity conditioning system on the flotation of fine-grained pyrite 高强度调节系统叶轮结构及运行参数对细粒黄铁矿浮选的影响

IF 4.9 2区工程技术

Minerals Engineering Pub Date : 2025-04-30 DOI: 10.1016/j.mineng.2025.109363

Qingke Li , Jianghui Zhou , Yanming Wu , Yuankun Yang , Yanhong Wang , Guohua Gu , Binqing Liu

{"title":"Influence of the impeller structure and operating parameters of a high intensity conditioning system on the flotation of fine-grained pyrite","authors":"Qingke Li , Jianghui Zhou , Yanming Wu , Yuankun Yang , Yanhong Wang , Guohua Gu , Binqing Liu","doi":"10.1016/j.mineng.2025.109363","DOIUrl":"10.1016/j.mineng.2025.109363","url":null,"abstract":"<div><div>High intensity conditioning (HIC) is a highly effective strategy for enhancing the recovery of fine coal particles and is increasingly used in mineral processing. The effectiveness of HIC is influenced by several key factors, including equipment design, operational parameters, material properties, and process conditions. Fine materials have unique physical and chemical properties, such as density, surface wettability, and the solubility and diffusion of flotation agents. These properties necessitate customized impeller structures and operational parameters. This study examined pyrite, a typical sulfide mineral with 50 % of particles finer than 22 µm. Using computational fluid dynamics simulations with multiphase flow models, the research revealed that increasing the impeller diameter, pitch angle, and/or agitation speed in a four-baffle tank significantly intensifies the velocity gradient and turbulent kinetic energy of the pulp fluid. These enhancements promote the suspension of solid particles and the dispersion of collectors. Compared with non-HIC scenarios, the optimal 50-mm-diameter impeller with a 60° pitch angle, when operating at 2000 rpm and agitated for 3 min, increased flotation recovery by 54.16 %. This improvement was attributed to an 18 % increase in collector adsorption and a 9.8-fold increase in particle aggregation, as confirmed by adsorption and optical microscopy experiments. This study highlights the critical role of HIC in improving the recovery of fine-grained minerals and provides valuable references for the design and selection of stirred impellers in HIC operations.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"228 ","pages":"Article 109363"},"PeriodicalIF":4.9,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143886549","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}

引用次数: 0

Selectively recovering scandium from red mud by a combination process of sulfation roasting and water leaching 采用硫化焙烧-水浸联合工艺从赤泥中选择性回收钪

IF 4.9 2区工程技术

Minerals Engineering Pub Date : 2025-04-29 DOI: 10.1016/j.mineng.2025.109357

Shanjin Mao , Kui Huang , Yuanhuan Lu , Xinke Shan , Haili Dong , Ruijiao Zhai , Tao Zhou

{"title":"Selectively recovering scandium from red mud by a combination process of sulfation roasting and water leaching","authors":"Shanjin Mao , Kui Huang , Yuanhuan Lu , Xinke Shan , Haili Dong , Ruijiao Zhai , Tao Zhou","doi":"10.1016/j.mineng.2025.109357","DOIUrl":"10.1016/j.mineng.2025.109357","url":null,"abstract":"<div><div>In order to reduce the environmental pollution caused by red mud and to make full use of the valuable metal resources, a process combining sulfation roasting-water leaching and solvent extraction was proposed to recover Sc from red mud. The phase transition, leaching kinetics and the effects of roasting temperature, concentrated sulfuric acid addition, roasting time on the leaching of Sc and major elements were investigated. The research results indicated that the roasting temperature played a critical role in selective separation of Sc from impurities. Phase transitions and thermal decomposition behaviors of sulfated samples suggested that the decomposition order of various metal sulfates was: TiOSO<sub>4</sub> > Fe<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub> > NaFe(SO<sub>4</sub>)<sub>2</sub> > NaAl(SO<sub>4</sub>)<sub>2</sub> > Al<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub>> Na<sub>3</sub>Sc(SO<sub>4</sub>)<sub>3</sub> > Y<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub> > La<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub> > Na<sub>2</sub>SO<sub>4</sub> > CaSO<sub>4</sub>. Furthermore, the leaching kinetics demonstrated that the leaching process of Sc conformed to a multiphase liquid–solid reaction model with diffusion-controlled. Under the optimized conditions (15°C, 0.5% P507, 0.5 pH and 1:10 O/A ratio), 99.24% Sc and less than 1% Fe, 11% Al were extracted. This approach is efficient and selective, which presents an excellent insight for the recovery of valuable resources from bauxite residue.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"228 ","pages":"Article 109357"},"PeriodicalIF":4.9,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143883040","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}

引用次数: 0

Review: Biorecovery of precious metals from waste printed circuit boards 综述：废弃印刷电路板中贵金属的生物回收

IF 4.9 2区工程技术

Minerals Engineering Pub Date : 2025-04-28 DOI: 10.1016/j.mineng.2025.109306

Wuyi Ming , Shunchang Hu , Xiaofei Zhang , Jun Ma , Wenbin He , Yapeng Xu , Hongyan Wang , Yingjie Xu , Wenbo Xing , Zhijun Chen , Xiaoke Li

{"title":"Review: Biorecovery of precious metals from waste printed circuit boards","authors":"Wuyi Ming , Shunchang Hu , Xiaofei Zhang , Jun Ma , Wenbin He , Yapeng Xu , Hongyan Wang , Yingjie Xu , Wenbo Xing , Zhijun Chen , Xiaoke Li","doi":"10.1016/j.mineng.2025.109306","DOIUrl":"10.1016/j.mineng.2025.109306","url":null,"abstract":"<div><div>Presently, as electronic waste continues to surge, waste printed circuit boards (WPCBs) have emerged as one of the fastest-growing waste category. This causes severe environmental pollution and threats to human health. However, there are many precious metals in WPCBs. To achieve environmental conservation and sustainable development, adopting biorecovery techniques for the extraction/reuse of WPCBs has become a promising approach. Firstly, this review provided an overview of e-waste material categorization, pretreatment methods, and screening methods. Secondly, biorecovery was decomposed into two primary domains: bioleaching and biosorption, with detailed reviews conducted on the mechanisms and leaching yields of these two processes. Thirdly, a review of purification techniques for bioleaching solutions was conducted. Finally, a comprehensive comparison was conducted on the similarities and differences between bioleaching and biosorption. The maximum bioleaching leaching yields for Au, Ag, and Pt were approximately 76.6%, 90%, and 60%, respectively, while the maximum biosorption leaching yields for Au was approximately 100%. This review aims to establish a foundation for the application of biorecovery at an industrial scale.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"228 ","pages":"Article 109306"},"PeriodicalIF":4.9,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143878570","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}

引用次数: 0

Preparation of a granular montmorillonite and fly ash composite adsorbent and application for Pb2+ and butyl xanthate adsorption 粒状蒙脱土与粉煤灰复合吸附剂的制备及其对Pb2+和丁基黄药的吸附

IF 4.9 2区工程技术

Minerals Engineering Pub Date : 2025-04-28 DOI: 10.1016/j.mineng.2025.109345

Guifang Wang , Ming Yin , Gan Zhu , Guangchuan Liang , Dingzheng Wang , Jinlin Yang , Shaojian Ma

{"title":"Preparation of a granular montmorillonite and fly ash composite adsorbent and application for Pb2+ and butyl xanthate adsorption","authors":"Guifang Wang , Ming Yin , Gan Zhu , Guangchuan Liang , Dingzheng Wang , Jinlin Yang , Shaojian Ma","doi":"10.1016/j.mineng.2025.109345","DOIUrl":"10.1016/j.mineng.2025.109345","url":null,"abstract":"<div><div>This study systematically investigated the adsorption performance of montmorillonite-fly ash composite particles (Mt-FA) and modified Mt-FA (OTAC/Mt-FA) with octadecyltrimethylammonium chloride for Pb<sup>2+</sup> and butyl xanthate (BX) removal, focusing on critical experimental conditions: initial solution pH, adsorbent dosage, and contact time. The results demonstrated that at pH 5 with a dosage of 4 g/L for both Mt-FA and OTAC/Mt-FA, the equilibrium removal efficiencies of Pb<sup>2+</sup> were approximately 100 % (adsorption capacity: 49.9 mg/g) and 79.8 % (39.9 mg/g), respectively. Under the conditions of dosage 10 g/L and pH 7, the equilibrium removal of BX by OTAC/Mt-FA was approximately 100 % (10.0 mg/g), while Mt-FA exhibited negligible adsorption of BX. This discrepancy is attributed to the introduction of OTAC, which not only provides hydrophobic interactions but also additional electrostatic interaction sites, enabling more efficient adsorption of BX. Characterization analysis combined with kinetic results confirmed the successful intercalation of OTAC into montmorillonite interlayers and elucidated the adsorption mechanisms: 1) for Pb<sup>2+</sup>, involving electrostatic attraction, chemical precipitation, and ion exchange; 2) for butyl xanthate (BX), involving electrostatic and hydrophobic interactions. These results highlight that montmorillonite-fly ash functionalized composite particles exhibit significant application potential in the efficient adsorption of heavy metals or organic contaminants, while providing notable advantages in the solid–liquid separation of the adsorbent after adsorption.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"228 ","pages":"Article 109345"},"PeriodicalIF":4.9,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143878572","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}

引用次数: 0

A new strategy of one-step sequential extraction of copper cyanide complex ions from cyanide leach solutions 一步序提氰化铜络合离子的新策略

IF 4.9 2区工程技术

Minerals Engineering Pub Date : 2025-04-28 DOI: 10.1016/j.mineng.2025.109367

Weichao Li, Wengang Liu, Wenbao Liu, Ruirui Zhang, Shuaichao Wang

{"title":"A new strategy of one-step sequential extraction of copper cyanide complex ions from cyanide leach solutions","authors":"Weichao Li, Wengang Liu, Wenbao Liu, Ruirui Zhang, Shuaichao Wang","doi":"10.1016/j.mineng.2025.109367","DOIUrl":"10.1016/j.mineng.2025.109367","url":null,"abstract":"<div><div>Copper cyanide complex ions in cyanide solution of gold extraction by cyanidation will worsen the recovery of gold. Therefore, phosphate-based P204 ionic liquids (ILs) with different cationic carbon chain structures were synthesized and applied to the extraction of copper cyanide complex ions in cyanide solutions. During the extraction process, due to the self-assembly actuation by ILs, macroscopic white solids rich in copper cyanide complex ions are formed at the phase interface. Meanwhile, the solid phase loaded with copper cyanide complex ions can be separated by simple filtration without further stripping. The extraction behaviors were systematically studied in the present work. The results show that more than 97 % of copper cyanide complex ions by ILs P204-N4441 were extracted under the optimum extraction conditions. Meanwhile, the Self-assembly extraction mechanism was investigated detaily, the SEM, mapping EDS, FT-IR, and XPS analyses reveled that the potential mechanism of extraction for copper cyanide complex ions is coordination reaction. It is worth noting that the extraction efficiency of self-assembly organic phase remains 78.45 % after three cycles, which shows that the self-assembly extraction system has good reusability.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"228 ","pages":"Article 109367"},"PeriodicalIF":4.9,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143883046","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}

引用次数: 0

Adsorption mechanism of a novel collector (2-ethylhexyl) phosphonic acid mono-2-ethylhexyl ester for selective flotation separation of ilmenite from titanaugite 新型捕收剂（2-乙基己基）膦酸单-2-乙基己基酯在钛辉矿选择性浮选分离中的吸附机理

IF 4.9 2区工程技术

Minerals Engineering Pub Date : 2025-04-28 DOI: 10.1016/j.mineng.2025.109340

Jiaqiao Yuan , Xiang Gong , Hongyu Lu , Wei Jiang , Hao Lai , Shuming Wen , Shaojun Bai , Dandan Wu

{"title":"Adsorption mechanism of a novel collector (2-ethylhexyl) phosphonic acid mono-2-ethylhexyl ester for selective flotation separation of ilmenite from titanaugite","authors":"Jiaqiao Yuan , Xiang Gong , Hongyu Lu , Wei Jiang , Hao Lai , Shuming Wen , Shaojun Bai , Dandan Wu","doi":"10.1016/j.mineng.2025.109340","DOIUrl":"10.1016/j.mineng.2025.109340","url":null,"abstract":"<div><div>To address the challenge of separating ilmenite from titanaugite, the feasibility of a novel collector (2-ethylhexyl) phosphonic acid mono-2-ethylhexyl ester (HEHEHP) was firstly investigated in this work. The flotation results indicated that HEHEHP possessed superior collecting performanceover a broader pH range for ilmenite compared to benzohydroxamic acid and sodium oleate. Under conditions with a pH of 8.0±0.2, a high-quality concentrate with a TiO<sub>2</sub> grade of 40.74% and a recovery of 87.66% was achieved. Adsorption studies and AFM analysis implied that the adsorption density of HEHEHP on ilmenite was significantly higher than that on titanaugite. Zeta potential analysis implied that the negatively charged HEHEHP anion primarily acted on ilmenite through chemisorption. ToF-SIMS, XPS, and FTIR further corroborated that HEHEHP interacted with the Fe and Ti sites on the ilmenite surface primarily through the P=O and P-OH functional groups in the adsorption process, leading to the formation of PO-Fe or PO-Ti bonds, thereby chemically adsorbing onto the ilmenite. DFT calculations proved that the two O atoms in the PO(OH) group exhibited significant reactivity, serving as the main active sites during the adsorption of HEHEHP. In summary, the chemical interactions between the PO(OH) group in HEHEHP and the active Fe and Ti sites on the ilmenite surface are responsible for the primary mechanism for the selective adsorption of HEHEHP.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"228 ","pages":"Article 109340"},"PeriodicalIF":4.9,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143878571","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}

引用次数: 0

Extraction and purification of a high purity quartz in the Altay orogenic belt and its potential evaluation 阿勒泰造山带一种高纯石英的提取纯化及其潜力评价

IF 4.9 2区工程技术

Minerals Engineering Pub Date : 2025-04-26 DOI: 10.1016/j.mineng.2025.109347

Yameng Ma , Jianguo Li , Zhichao Wu , Xiumin Tan , Haiqi Zhang , Xiufeng Zhang , Yuejun Yi

{"title":"Extraction and purification of a high purity quartz in the Altay orogenic belt and its potential evaluation","authors":"Yameng Ma , Jianguo Li , Zhichao Wu , Xiumin Tan , Haiqi Zhang , Xiufeng Zhang , Yuejun Yi","doi":"10.1016/j.mineng.2025.109347","DOIUrl":"10.1016/j.mineng.2025.109347","url":null,"abstract":"<div><div>High-purity quartz (HPQ) serves as a critical raw material for strategic high-tech industries. This study focused on the leaching purification of HPQ derived from Xinjiang pegmatitic quartz concentrates. Four leaching reagents (RL, RH, OL, and OH) were systematically evaluated to optimize process parameters including liquid-to-solid ratio (L/S), leaching temperature, and reaction time. Orthogonal experimental design with three factors (L/S ratio, temperature, time) and three levels was employed to determine optimal conditions. The results indicated that OL reagent with an L/S ratio of 2.9:1 at 56.6 °C for 6.8 h achieved the best performance: total impurity content reduced to 16.98 μg/g, impurity removal efficiency reached 92.65 %, and product yield remained at 93 %. The final product met the impurity specifications of SJ/T 11386-2009 (China) for photovoltaic crucible applications, demonstrating its potential as a domestic alternative to imported HPQ. This study provides a novel reagent system and optimized process for HPQ production from pegmatitic sources. Future work should focus on scale-up verification and environmental impact assessment of the proposed process.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"228 ","pages":"Article 109347"},"PeriodicalIF":4.9,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143876966","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}

引用次数: 0

Utilization ethylbenzyl quaternary ammonium salt as a selective collector for co-reverse flotation removal of silica, organic matter, and fluoride from phosphogypsum 利用乙基苄基季铵盐作为选择性捕收剂，从磷石膏中反浮选去除二氧化硅、有机物和氟化物

IF 4.9 2区工程技术

Minerals Engineering Pub Date : 2025-04-26 DOI: 10.1016/j.mineng.2025.109354

Xiaohong Chen , Yi Yu , Ying Liu, Miao Zhu, Hengpeng Ye, Shaohua Chen

{"title":"Utilization ethylbenzyl quaternary ammonium salt as a selective collector for co-reverse flotation removal of silica, organic matter, and fluoride from phosphogypsum","authors":"Xiaohong Chen , Yi Yu , Ying Liu, Miao Zhu, Hengpeng Ye, Shaohua Chen","doi":"10.1016/j.mineng.2025.109354","DOIUrl":"10.1016/j.mineng.2025.109354","url":null,"abstract":"<div><div>Impurities such as silicon, organic matter and fluoride restrict the utilization of phosphogypsum (PG). In this study, dodecyl dimethyl ethylbenzyl ammonium chloride (DDEA) was used as the reverse flotation collector to remove impurities from PG. At the natural pH (2.3–2.5) of the slurry, with pine oil and DDEA dosages of 300 g/t, slurry concentration of 30 %, and aeration of 0.20 m<sup>3</sup>/h, the content of SiO<sub>2</sub>, organic matter, and fluoride ions in PG can decreased from 6.87 wt%, 0.94 wt%, and 0.42 wt% to 1.90 wt%, 0.13 wt%, and 0.03 wt%, respectively, and the whiteness increased from 33.67 to 64.41 %. Correspondingly, the obtained CaSO<sub>4</sub>·2H<sub>2</sub>O purity is 94.44 %, meeting first grade standard of PG used as building materials (GB/T 23456–2018). Characterization analysis revealed that flotation primarily removed the quartz phase present in the fine particles. DDEA exhibited high selectivity for adsorption on the quartz surface by significantly affecting the electronegativity and hydrophobicity of the quartz surface. It was mainly adsorbed on the quartz surface through electrostatic attraction with Si-O<sup>-</sup> and hydrogen bonding with Si-O bonds, without undergoing chemical reactions. Compared with traditional flotation methods, this process achieved the simultaneous removal of SiO<sub>2</sub>, organic matter, and fluoride, which has potential industrial application prospects.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"228 ","pages":"Article 109354"},"PeriodicalIF":4.9,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143873449","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}

引用次数: 0