Minerals Engineering最新文献_第2页

Integrated experimental and thermodynamic modelling study of phase equilibria in the “CuO0.5”-PbO-AlO1.5 system in equilibrium with Cu/Pb metal CuO0.5 -PbO-AlO1.5体系与Cu/Pb金属平衡相平衡的综合实验与热力学模拟研究

IF 4.9 2区工程技术

Minerals Engineering Pub Date : 2025-07-14 DOI: 10.1016/j.mineng.2025.109620

Georgii Khartcyzov, Maksym Shevchenko, Evgenii Nekhoroshev, Evgueni Jak

{"title":"Integrated experimental and thermodynamic modelling study of phase equilibria in the “CuO0.5”-PbO-AlO1.5 system in equilibrium with Cu/Pb metal","authors":"Georgii Khartcyzov, Maksym Shevchenko, Evgenii Nekhoroshev, Evgueni Jak","doi":"10.1016/j.mineng.2025.109620","DOIUrl":"10.1016/j.mineng.2025.109620","url":null,"abstract":"<div><div>This study investigated the phase equilibria in the “CuO<sub>0.5</sub>”-PbO-AlO<sub>1.5</sub> system in equilibrium with Cu/Pb metal as part of the integrated experimental and thermodynamic modelling study of phase equilibria in the Cu-Pb-Zn-Fe-Ca-Si-Al-Mg-O-S-(As, Sn, Sb, Bi, Ag, Au, Ni, Cr, Co and Na) gas/oxide liquid/matte/speiss/ metal/solids system supporting the development and optimisation of pyrometallurgical processes. The experimental approach involved the equilibration and quenching technique followed by the electron probe X-ray microanalysis (EPMA). The resulting experimental data described the liquidus of the “CuO<sub>0.5</sub>”-PbO-AlO<sub>1.5</sub> system in equilibrium with Cu/Pb metal, including corundum (Al<sub>2</sub>O<sub>3</sub>), PbAl<sub>12</sub>O<sub>19</sub>, PbAl<sub>2</sub>O<sub>4</sub>, Pb<sub>9</sub>Al<sub>8</sub>O<sub>21</sub>, massicot (PbO), cuprite (Cu<sub>2</sub>O), delafossite (CuAlO<sub>2</sub>) and copper plumbite (Cu<sub>2</sub>PbO<sub>2</sub>) primary phase fields. The experiments were conducted as part of the integrated experimental and thermodynamic modelling study aimed to obtain a self-consistent set of parameters of the thermodynamic model for all phases of the “CuO<sub>0.5</sub>”-PbO-AlO<sub>1.5</sub> system in equilibrium with Cu/Pb metal and its subsystems, consistent with major 20 component system. The liquidus surface of the “CuO<sub>0.5</sub>”-PbO-AlO<sub>1.5</sub> system over the complete range of temperatures and concentrations was presented for the first time.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"233 ","pages":"Article 109620"},"PeriodicalIF":4.9,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144614420","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

Study on the mechanism of the effect of plasma modified APAM on the sedimentation of kaolinite particles 等离子体改性APAM对高岭石颗粒沉降影响的机理研究

IF 4.9 2区工程技术

Minerals Engineering Pub Date : 2025-07-12 DOI: 10.1016/j.mineng.2025.109592

Yizhe Yang, Lijun Liu, Hanyu Zhao, Liang Han, Bo Hu, Wei Yu, Zhanglei Zhu, Zhen Li

{"title":"Study on the mechanism of the effect of plasma modified APAM on the sedimentation of kaolinite particles","authors":"Yizhe Yang, Lijun Liu, Hanyu Zhao, Liang Han, Bo Hu, Wei Yu, Zhanglei Zhu, Zhen Li","doi":"10.1016/j.mineng.2025.109592","DOIUrl":"10.1016/j.mineng.2025.109592","url":null,"abstract":"<div><div>In coal slime water treatment, traditional anionic polyacrylamide (APAM) faces challenges including difficulties in balancing charge density with hydrolysis degree and inadequate hydrophilicity. This study developed a plasma-modified APAM (P-APAM) and systematically investigated its enhancement mechanism for kaolinite particle flocculation and sedimentation. Experiments were performed with 5–20 s plasma treatments on APAM solutions, analyzing P-APAM properties such as viscosity, pH, conductivity, molecular chain structure, and functional group configuration. Parallel flocculation-sedimentation tests evaluated kaolinite treatment performance through settling velocity, supernatant turbidity, floc size, and Zeta potential measurements. Results revealed that 5 s plasma treatment strengthened hydrogen bonding while altering oxygen-containing functional group composition and arrangement in P-APAM molecules. The treatment promoted oxidative degradation of hydrophobic groups (–CH<sub>3</sub>/–CH<sub>2</sub>-), boosting hydration capacity and hydrophilicity while optimizing molecular chain flexibility and surface adaptability. The modified P-APAM formed compact floc structures (SK value = 0.612), achieving superior sedimentation rates, larger floc sizes, and enhanced flocculation efficiency at reduced dosages. Comprehensive experimental analysis confirmed that plasma-modified P-APAM substantially improved kaolinite flocculation and sedimentation performance. This research presents an innovative plasma-modified flocculant approach for clay mineral treatment in slime water, establishing an effective technical pathway for developing high-performance green flocculant systems with significant reference value for sustainable mineral processing.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"233 ","pages":"Article 109592"},"PeriodicalIF":4.9,"publicationDate":"2025-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144604884","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

New insights into the structure-activity relationship of the N containing heterocyclic activators for the lime depressed molybdenite flotation 含N杂环活化剂在石灰抑制辉钼矿浮选中的构效关系新认识

IF 4.9 2区工程技术

Minerals Engineering Pub Date : 2025-07-12 DOI: 10.1016/j.mineng.2025.109605

Qiqiao Liu , Wei Chen , Ying Wang , Zihan Ye , Sheng Liu , Jiang Yu , Guangyi Liu

{"title":"New insights into the structure-activity relationship of the N containing heterocyclic activators for the lime depressed molybdenite flotation","authors":"Qiqiao Liu , Wei Chen , Ying Wang , Zihan Ye , Sheng Liu , Jiang Yu , Guangyi Liu","doi":"10.1016/j.mineng.2025.109605","DOIUrl":"10.1016/j.mineng.2025.109605","url":null,"abstract":"<div><div>The molybdenite is a typical layered sulfide mineral with extremely high natural hydrophobicity and therefore it is extracted by flotation technology. However, molybdenite is usually depressed by the flotation regulator lime and needs activization. In this study, we introduced 10 kinds of N-heterocycles to systematically study the structure–activity relationship of the N-heterocyclic flotation activators for the lime inhibited molybdenite, mainly through flotation tests, surface detection and DFT calculation. The flotation results showed that the lime almost irreversibly depressed the molybdenite flotation when using kerosene as collector alone, and adding these N-heterocyclic reagents effectively helped molybdenite regain its high flotability. When lime was used as 120 mg/L and kerosene at 30 mg/L, the activator effect could be ranked as: 3MI ≈ 2Phl ≈ 5 MB ≈ 5MI ≈ TTA > IND ≈ BTA ≈ Bzlm ≈ 5PhTH > 2MZ, which was decided by the recovery increment. The surface detection indicated that the depression mechanism of the lime was mainly through the adsorption of the CaOH<sup>+</sup>, Ca<sup>2+</sup>, Ca(OH)<sub>2</sub> on the basal plane of molybdenite crystal, thus the chelating affinity of the N-heterocyclic reagents towards the lime components decided its activation ability. The DFT calculation suggested that the N-heterocycles was also able to interact with the Mo sites exposed by surface oxidation on the basal plane, thus the reactivity towards the Mo as well as the steric configuration also determined the activator effect. Therefore, the chelating ability of the activator towards the lime components/exposed Mo sites and the steric configuration of the rest alkyl group both contribute to the structure–activity relationship.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"233 ","pages":"Article 109605"},"PeriodicalIF":4.9,"publicationDate":"2025-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144604887","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

An overview of bioprocess based recovery and recycling techniques for battery waste management: Transitioning from environmental hazard to sustainability 电池废物管理的基于生物过程的回收和再循环技术综述：从环境危害到可持续性的过渡

IF 4.9 2区工程技术

Minerals Engineering Pub Date : 2025-07-11 DOI: 10.1016/j.mineng.2025.109598

Shatrupa Singh , Deenan Santhiya , Jai Gopal Sharma

{"title":"An overview of bioprocess based recovery and recycling techniques for battery waste management: Transitioning from environmental hazard to sustainability","authors":"Shatrupa Singh , Deenan Santhiya , Jai Gopal Sharma","doi":"10.1016/j.mineng.2025.109598","DOIUrl":"10.1016/j.mineng.2025.109598","url":null,"abstract":"<div><div>Battery waste poses ecological, economic and health risks due to rising usage and improper disposal. Accumulation in landfills releases toxic compounds, while valuable metals remain unrecycled. Conversely, battery waste is also characterized as secondary resource because it has a higher metal content than primary ores. Conventional approaches, such as pyrometallurgy and hydrometallurgy are expensive, energy intensive, and polluting. This shift highlights the need for sustainable resource management to recover constituents from spent battery materials, as depletion of metallic resources is one of the most critical environmental and socioeconomic concerns Bioprocesses such as bioleaching, biosorption, biomineralization and bio-electrochemical systems are highlighted in this review as sustainable, selective recovery alternatives. This review explores the dual role of agricultural waste for waste valorization and metal extraction aligning with circular economy principles. Mechanistic understanding of microbe-metal and agricultural waste interactions is discussed in detail, emphasizing on sequential integration of bioprocesses, hybrid systems combining bioprocesses with conventional techniques and improving recovery efficiency. Progress, challenges and barriers in scalability are discussed, addressing toxicological concerns of emerging battery contaminants. The review promotes bio-based eco-friendly recovery processes, with vision to achieve reduced environmental impact, improved metal recovery and efficient integration of circular economy of resources.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"233 ","pages":"Article 109598"},"PeriodicalIF":4.9,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144596687","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

Kaolin phyllosilicate-derived silica quantum dots via acid-base hydrothermal synthesis for anti-cancer applications 通过酸碱水热合成高岭土层状硅酸盐衍生的二氧化硅量子点用于抗癌

IF 4.9 2区工程技术

Minerals Engineering Pub Date : 2025-07-10 DOI: 10.1016/j.mineng.2025.109603

Novi Irmania , Solihin , A’liyatur Rosyidah

{"title":"Kaolin phyllosilicate-derived silica quantum dots via acid-base hydrothermal synthesis for anti-cancer applications","authors":"Novi Irmania , Solihin , A’liyatur Rosyidah","doi":"10.1016/j.mineng.2025.109603","DOIUrl":"10.1016/j.mineng.2025.109603","url":null,"abstract":"<div><div>This study presents a green and sustainable approach for synthesizing silica quantum dots (QDs) from kaolin phyllosilicate collected in Cipatujah, West Java, Indonesia, via a two-step hydrothermal acid–base method. Kaolin, a naturally abundant and low-cost phyllosilicate mineral composed primarily of Al<sub>2</sub>Si<sub>2</sub>O<sub>5</sub>(OH)<sub>4</sub>, served as the silica precursor. In the first step, kaolin was hydrothermally treated with hydrochloric acid (HCl) to remove impurities such as Fe and Mn and to extract orthosilicic acid. In the second step, the purified material was treated with sodium hydroxide (NaOH) under identical hydrothermal conditions, inducing bond scission and promoting the formation of nanoscale silica via silicate intermediates. This method successfully yielded high-purity silica QDs. X-ray fluorescence (XRF) analysis confirmed a Silica (SiO<sub>2</sub>) content of 90.2 %. High-resolution transmission electron microscopy (HRTEM) and field-emission scanning electron microscopy (FESEM) revealed spherical and amorphous particles. Cytotoxicity assay demonstrated significant dose-dependent inhibitory effects on B16F0 melanoma and MCF-7 breast cancer cells, with half-maximal inhibitory concentration (IC<sub>50</sub>) values during 24 h incubation of 134 ppm and 147 ppm, respectively. This environmentally friendly synthesis strategy minimizes the use of hazardous reagents while utilizing natural mineral resources, aligning with the principles of sustainable nanotechnology. The findings underscore the potential of kaolin-derived silica QDs as biocompatible and eco-friendly nanomaterials for cancer therapy.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"233 ","pages":"Article 109603"},"PeriodicalIF":4.9,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144589329","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

The process analysis of converting ferronickel into high nickel matte 镍铁转化为高镍锍的工艺分析

IF 4.9 2区工程技术

Minerals Engineering Pub Date : 2025-07-10 DOI: 10.1016/j.mineng.2025.109602

Qifan Zhou , Ying Liu , Honghong Sun , Biwen Yang , Sanping Liu , Derek O. Northwood , Kristian E. Waters , Yanqiu Xia , Hao Ma

{"title":"The process analysis of converting ferronickel into high nickel matte","authors":"Qifan Zhou , Ying Liu , Honghong Sun , Biwen Yang , Sanping Liu , Derek O. Northwood , Kristian E. Waters , Yanqiu Xia , Hao Ma","doi":"10.1016/j.mineng.2025.109602","DOIUrl":"10.1016/j.mineng.2025.109602","url":null,"abstract":"<div><div>Sulfurization smelting is a effective process for the transformation of ferronickel into low nickel matte, with subsequent conversion through oxygen blowing and converting enabling the production of high nickel matte. This study involved the initial mixing and smelting of ferronickel, SiO<sub>2</sub>, pyrite, and coke, followed by the blending of the resulting low nickel matte with SiO<sub>2</sub> during oxygen blowing at elevated temperatures, with an emphasis on optimizing both stages of the process. The research revealed that in the first stage, when 50 g of pyrite, 27 g of SiO<sub>2</sub>, and 3 g of coke were added, and the smelting was carried out at a temperature of 1425℃ for 2.5 h, over 99 % of the nickel was successfully converted from ferronickel into low nickel matte, with a nickel content exceeding 35 % and sulfur content of around 17 %, while the slag nickel content was as low as 0.4 %. In the second stage, with a conversion time of 8 h, 23 g of SiO<sub>2</sub> addition, and a converting temperature of 1300℃, over 96 % of the nickel was transformed into high-grade matte with a nickel content exceeding 75 % and sulfur content of 18 %. These findings provide valuable insights for the utilization of ferronickel in the production of nickel sulfate to meet the demands of the burgeoning lithium battery industry.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"233 ","pages":"Article 109602"},"PeriodicalIF":4.9,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144589330","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

Online particle-size monitoring for hydrocyclone overflow: Where is the beacon? 水力旋流器溢流粒径在线监测：信标在哪里？

IF 4.9 2区工程技术

Minerals Engineering Pub Date : 2025-07-10 DOI: 10.1016/j.mineng.2025.109553

Difan Tang , Lei Chen , Richmond Komla Asamoah , Eric Hu

{"title":"Online particle-size monitoring for hydrocyclone overflow: Where is the beacon?","authors":"Difan Tang , Lei Chen , Richmond Komla Asamoah , Eric Hu","doi":"10.1016/j.mineng.2025.109553","DOIUrl":"10.1016/j.mineng.2025.109553","url":null,"abstract":"<div><div>Monitoring the particle size-passing fraction (PSPF) at hydrocyclone overflow is critical for energy-efficient comminution and flotation. Knowledge of particle size distribution (PSD) beyond the single PSPF number can be yet more beneficial to plant operators. However, the large number of hydrocyclones typically employed in a processing plant and the necessity of monitoring each individual hydrocyclone unit have posed significant challenges to online PSPF and PSD monitoring. The questions are: What are the technologies available for online particle size assessment (PSA)? To what extent have these technologies been assisting the mining industry? Where is the beacon leading to a better solution? This paper reviews existing methods for PSPF and PSD online monitoring at hydrocyclones and classifies them into five categories — numerical, mechanical, attenuation, optical, and vibration. Evaluations are made in terms of online capability, system compactness, particle size range, performance robustness, measurement accuracy, maintenance requirements, and implementation costs, with comparison made and sensitivity analysis conducted. It reveals there is no single solution that excels in all evaluation criteria, and instead, different methods could mutually complement. Guidance is provided to assist the industry in selecting appropriate online PSA systems for hydrocyclone overflow based on different priorities. Data fusion and machine learning are recommended for further advancement in enhancing measurement accuracy and enabling self-calibration.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"233 ","pages":"Article 109553"},"PeriodicalIF":4.9,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144589326","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

Coal-based reduction roasting and magnetic separation of low-grade Botswana iron ore for sustainable beneficiation 低品位博茨瓦纳铁矿石煤基还原焙烧—磁选可持续选矿

IF 4.9 2区工程技术

Minerals Engineering Pub Date : 2025-07-10 DOI: 10.1016/j.mineng.2025.109594

Mompati Mpho Bulayani, Prasad Raghupatruni, Tirivaviri Mamvura, Gwiranai Danha

{"title":"Coal-based reduction roasting and magnetic separation of low-grade Botswana iron ore for sustainable beneficiation","authors":"Mompati Mpho Bulayani, Prasad Raghupatruni, Tirivaviri Mamvura, Gwiranai Danha","doi":"10.1016/j.mineng.2025.109594","DOIUrl":"10.1016/j.mineng.2025.109594","url":null,"abstract":"<div><div>This study demonstrates a novel pathway to beneficiate low-grade hematite-rich iron ore (56.1 % Fe) from Botswana’s Ikongwe deposit through coal-based magnetizing roasting and low-intensity magnetic separation (LIMS). Leveraging Botswana’s underutilized resources, Morupule non-coking coal (50.01 % fixed carbon, 21.13 % ash) was utilized as a sustainable reductant. A Taguchi L9 orthogonal array systematically optimized critical parameters: roasting temperature (700–900 °C), residence time (30–90 min), and coal dosage (25–50 %). Optimal conditions (800 °C, 60 min, 50 % coal dosage) yielded a magnetic concentrate grading 68.2 % Fe at 85.7 % recovery, representing a 21.6 % relative iron upgrade. Advanced characterization (XRD, SEM-EDS) confirmed efficient phase transformation from hematite to magnetite with concurrent gangue reduction. Kinetic modelling indicated a chemically controlled reaction mechanism, with activation energies ranging from 159.1 to 160.6 kJ/mol. Thermodynamic evaluation revealed negative Gibbs free energy values (ΔG), supporting the spontaneity of the reduction reactions across the tested temperatures. This integrated approach validates the technical and economic feasibility of utilizing Botswana’s local resources to valorise low-grade iron ore, offering a viable route for Botswana to enhance its mineral-based industrialization and to reduce reliance on imported ferrous materials.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"233 ","pages":"Article 109594"},"PeriodicalIF":4.9,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144589331","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

Optimization and kinetic analysis of co-extraction of vanadium(IV) and chromium(III) from high chromium vanadium slag with titanium dioxide waste acid 二氧化钛废酸共萃取高铬钒渣中钒（IV）和铬（III）的优化及动力学分析

IF 4.9 2区工程技术

Minerals Engineering Pub Date : 2025-07-09 DOI: 10.1016/j.mineng.2025.109604

Zhenghao Wang , Zhiyu Li , Liang Chen , Yingming Zhu , Kejing Wu , Dongmei Luo

{"title":"Optimization and kinetic analysis of co-extraction of vanadium(IV) and chromium(III) from high chromium vanadium slag with titanium dioxide waste acid","authors":"Zhenghao Wang , Zhiyu Li , Liang Chen , Yingming Zhu , Kejing Wu , Dongmei Luo","doi":"10.1016/j.mineng.2025.109604","DOIUrl":"10.1016/j.mineng.2025.109604","url":null,"abstract":"<div><div>Conventional methods for the co-extraction of vanadium (V) and chromium (Cr) from high chromium vanadium slag (HCVS) are normally accompanied with the formation of toxic V(V) and Cr(VI) residues and wastewater. In this study, a new process for the co-extraction of V(IV) and Cr(III) from HCVS with titanium dioxide waste acid (TWWA) by direct pressurized leaching is proposed to eliminate the looming threat of toxic V(V) and Cr(VI) formation. To gain insights into the mineralogical characteristics and liberation behavior of HCVS, mineral liberation analysis (MLA) was performed. Subsequently, the response surface methodology (RSM) was used to optimize the leaching conditions and delve into investigate the kinetics of V in the pressurized acid leaching process. By optimizing the leaching conditions, the leaching efficiencies of V, Cr, Fe, Mn, and Ti were 97.98%, 92.01%, 94.70%, 91.03%, and 0.56%, respectively. Kinetic analysis showed that the chemical reaction was the controlling step of the leaching process. Notably, this method ensures the efficient leaching of valuable metals, and the valence states present in the leach solution are V(IV), Cr(III), and Fe(II). By mitigating the generation of toxic residues and reducing the pollution burden on the environment, this study makes a compelling case for the sustainable and environmentally responsible extraction of V and Cr from HCVS.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"233 ","pages":"Article 109604"},"PeriodicalIF":4.9,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144589328","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

Effect of sodium fluorosilicate on the flotation preparation of ultra-low ash coal: selective separation of coal and kaolinite 氟硅酸钠对超低灰分煤浮选制备的影响：煤与高岭石的选择性分离

IF 4.9 2区工程技术

Minerals Engineering Pub Date : 2025-07-09 DOI: 10.1016/j.mineng.2025.109585

Wei Xiao, Yuping Fan, Xiaomin Ma, Xianshu Dong, Maoqing Yang, Yujin Sun, Pengcheng Wen

{"title":"Effect of sodium fluorosilicate on the flotation preparation of ultra-low ash coal: selective separation of coal and kaolinite","authors":"Wei Xiao, Yuping Fan, Xiaomin Ma, Xianshu Dong, Maoqing Yang, Yujin Sun, Pengcheng Wen","doi":"10.1016/j.mineng.2025.109585","DOIUrl":"10.1016/j.mineng.2025.109585","url":null,"abstract":"<div><div>The comprehensive utilisation value of ultra-low ash coal has been widely recognised, and ultra-fine coal flotation as an effective method for the preparation of ultra-low-ash coal products, the efficient separation of ultra-fine coal and gangue minerals in the sorting process is crucial. In the present research work, the inhibitor sodium fluosilicate (SSF) was used for ash removal in flotation of ultrafine anthracite using sodium oleate (NaOL) as a collector. Flotation results show that the addition of SSF increased the concentrate yield from 17.68% to 29.34% and reduced the ash content from 2.10% to 1.93%. SSF acted on the kaolinite surface by both physical adsorption and chemical adsorption, and the competitive adsorption hindered NaOL adsorption on the kaolinite surface, which further enlarged the difference in hydrophobicity between the coal and kaolinite surfaces, and the difference in the contact angle between coal and kaolinite increased from 70.1° to 79.6°. And SEM-EDS verified that the addition of SSF did attenuate the adhesion of high ash fine mud gangue minerals on the surface of coal particles. XPS analysis showed that while SSF acted on the surface of kaolinite by hydrogen bonding, its hydrolysis products Si(OH)<sub>3</sub><sup>-</sup> and SiO(OH)<sub>2</sub><sup>2–</sup> could be chemisorbed on the new Al active sites exposed by kaolinite due to ultrafine grinding. The stable adsorption behavior of SSF enlarges the surface interface difference between ultrafine-grained coal and kaolinite, which is conducive to the preparation of ultra-low-ash refined coal products by flotation.</div></div>","PeriodicalId":18594,"journal":{"name":"Minerals Engineering","volume":"233 ","pages":"Article 109585"},"PeriodicalIF":4.9,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144589327","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