APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Jing Qi,Jichang Tu,Xian Xie,Hongling Wang,Ruiqi Xie
In view of the combination of dodecylamine and hydroxamate can improve the flotation recovery of spodumene, a novel β -amino-hydroxamate surfactant, i.e., N -(3-(dodecylamino)) hydroxamic acid (DAHA), was designed and introduced into spodumene flotation. The micro-flotation performance indicated that DAHA performed excellent collecting ability toward spodumene, and 2.0 × 10 -4 mol/L of DAHA floated out about 90.2% of spodumene, while that of sodium oleate (NaOL) was only about 57.4%. The zeta potential of DAHA-treated spodumene revealed the effective chemisorption of hydroxamate group on spodumene surface. FTIR and XPS recommended that the hydroxamate group in DAHA chelated with surface Al sites to form five-membered hydroxamate-(O,O)-Al complexes. The affinity of DAHA on spodumene spontaneously enhanced by the protonated amino group (–NH 3 + ), which facilitated the chelation of hydroxamate with the surface Al atoms and strengthened the hydrophobicity of spodumene.
研究领域:
矿物加工工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2024
·
IF 5.3
Hui Shao,Bingqiao Yang,Huihua Luo,Ruiqi Ge,Jie Wu
In this study, N-OSS combined with DDA was examined as an novel collector. The collecting performances and their synergetic interaction mechanisms were investigated comprehensively. The micro-flotation results illustrated N-OSS/DDA exhibited excellent selectivity on separation without pre-activation. Contact angle tests revealed N-OSS/DDA could selectively enhance the hydrophobicity of spodumene, whereas, they barely affected that of albite. FTIR, SEM-EDS and Zeta potential revealed N-OSS/DDA might co-adsorb on spodumene surface rather than that of albite. XPS analysis and DFT calculations inferred the O 1 2p orbitals of -COO- within N-OSS could bond with Al 3s orbitals and the -NH 3 + groups of DDA adsorbed onto spodumene surface via hydrogen bonding and electrostatic attraction. Meanwhile, the hydrogen bonding between N-OSS and DDA promoted the co-adsorption on spodumene surface. While N-OSS/DDA weakly adsorbed on albite surface through physical adsorption. N-OSS/DDA exhibited outstanding floatability, which maybe a good substitute for conventional collectors in future.
研究领域:
矿物加工工程
·
表面化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2024
·
IF 5.3
Huiwen Ren,Ruiqi Xie,Sheng Jian,Xiong Tong,Xian Xie,Zhihui Zhao,Xuelin Wei
The separation of spodumene and albite by the new collector 12-aminododecanoic acid (12-ADA) without an activator or depressant was investigated by single-mineral and artificially mixed-ore flotation test. The results showed that under the 12-ADA concentration of 314 mg/L, pH 5.0, and 10 °C, the recoveries of spodumene and albite were 12.85 % and 89.15 %, respectively. At the 12-ADA concentration of 114 mg/L, pH 4.5, and 10 ± 2 °C, Li 2 O grade of 4.56 % and recovery of 84.55 % were achieved. In addition, the interaction mechanism between minerals and 12-ADA was investigated. The results showed that 12-ADA could form an association complex, which could create hydrogen bonds with the Si-O bond on the albite surface through NH 2 , and form chemical bonds with Na through COOH. However, 12-ADA mainly adsorbed onto the spodumene surface through electrostatic attraction. With an increase in the concentration of 12-ADA, albite could preferentially adsorb 12-ADA as a monolayer, while the adsorption between spodumene and 12-ADA was small, when 12-ADA exceeded a certain amount, it became prone to multilayer adsorption. 12-ADA overcame the temperature limitation of traditional fatty acid reagents and had potential application value for the flotation of spodumene in cold areas. It also provided a theoretical basis for the research and development of low-temperature reagents for spodumene.
研究领域:
矿物加工工程
·
材料科学与工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Xunlong Cheng,Xuran Ding,Jun Wang,Shuai Wang,Hong Zhong,Junhui Wang,Changzheng Wang,Zhanfang Cao,Xin Ma
To address the challenge of difficult flotation separation between spodumene and aluminosilicate minerals, this work synthesized a long-chain carboxylic acid surfactant featuring amide groups, N-Oleoylglycine, as a high-performance collector. Experimental results demonstrate that N-Oleoylglycine exhibits significantly improved collecting power for spodumene compared to conventional sodium oleate, along with superior selectivity in distinguishing spodumene from feldspar. Under optimized conditions (5 × 10 −4 mol/L concentration, pH 7.0), N-Oleoylglycine achieved 89.39 % flotation recovery for spodumene, contrasted with merely 9.78 % for feldspar, highlighting its exceptional separation efficacy. Nuclear magnetic resonance (NMR) analyses reveal that the deprotonated amide nitrogen coordinated with Al 3+ ions on spodumene surfaces. Density functional theory (DFT) calculations further identify the amide and carboxyl groups as the primary functional groups responsible for its collector properties. DFT calculations also predict that in the adsorption configuration of N-Oleoylglycine with Al ions, the Al ions form complexes with the N atom of the amide group and two carbonyl oxygen atoms, respectively Multiple characterization techniques — including contact angle measurements, FTIR spectroscopy, and XPS analysis — collectively substantiated that N-Oleoylglycine achieves selective adsorption on spodumene through synergistic interactions between its amide and carboxyl moieties. Notably, the self-assembly capability of amide groups through intermolecular hydrogen bonds enables ordered collector molecular arrangement on mineral surfaces, suggesting potential for advancing mineral separation technologies.
研究领域:
矿物加工工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
·
IF 5.4
Zheyi Zhang,Chenyu Fan,Fen Jiao,Qian Wei
The flotation recovery of fine-grained lepidolite is crucial for the efficient utilization of lithium resources. This study investigated the strengthening effect of the hydrophilic mineral garnet on the flotation of fine-grained lepidolite and explored its mechanism from the perspectives of mineral dissolution and slurry rheology. The flotation results showed that garnet particles significantly enhanced the flotation recovery of fine-grained lepidolite, achieving a maximum recovery of 85.41 % under optimal conditions. The results of infrared spectroscopy and X-ray photoelectron spectroscopy (XPS) analyses confirmed the absence of collector adsorption on garnet surfaces, eliminating competitive consumption of Dodecylamine(DDA)/Sodium dodecyl sulfonate (NaOl) reagents. The results of Zeta potential tests revealed that the ion dissolution on the surface of garnet increased the surface potential of lepidolite. Besides, the Al ions dissolved from the surface of garnet might promote the flotation of lepidolite. The rheological tests of the slurry demonstrated that under the combined action of the collector and coarse-grained garnet, the flocculation of fine-grained lepidolite was promoted, thereby strengthening the flotation recovery of fine-grained lepidolite. The findings provide novel approach and offers insights for optimizing the flotation process of fine-grained lepidolite.
研究领域:
矿物加工工程
·
材料科学与工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Kaiqian Shu,Longhua Xu,Houqin Wu,Zhen Tang,Liping Luo,Jie Yang,Yanbo Xu,Bo Feng
Sodium alginate (SA) was investigated for use as a depressant in the spodumene–feldspar system. In this flotation system, the SA is added before the cation collector, dodecylamine (DDA). The effects of SA on mineral floatability were systematically investigated by flotation experiments, X-ray photoelectron spectroscopy (XPS), Fourier transform IR spectroscopy (FTIR), zeta potential measurements, and speciation analysis. Single-mineral flotation results showed that using 30 mg/L SA allowed the separation of spodumene from feldspar at pH 6, although there was a strong pH dependence. Zeta potential measurements and FTIR analysis showed that SA and DDA can adsorb onto both minerals. XPS analysis revealed the adsorption mechanism: the strong affinity of SA for the mineral surface arose from the complexation of SA and Al sites. Analysis of the surface and solution chemistry revealed that SA chelated Al 3+ or its hydroxides and hindered the subsequent adsorption of DDA, resulting in a hydrophilic feldspar surface. In addition, there were more aluminium hydroxides and unsaturated O atoms on the spodumene surface than on that of feldspar, and these provided available sites for the adsorption of DDA to form a stable reticular structure with SA, thus improving the floatability of the spodumene at certain pH values. Lastly, a model for SA and DDA adsorption at the water–solid interface is proposed.
研究领域:
矿物加工工程
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材料科学与工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Hepeng Zhou,Fanxin Xie,Xianping Luo,Boyuan Zhang,Siqi Yang,Yongbing Zhang
In this paper, the effect of benzyl arsenic acid (BAA) and sodium oleate (NaOl) on mineral flotation was studied for the first time from the perspective of the difference of solidophilic atom. Compared with NaOl, the solidophilic O atoms of BAA had stronger electronegativity and the bonding strength of As-O was lower than that of C O. Thus, when BAA adsorbed on the mineral surfaces, the bonding strength of the solidophilic O atoms with the adsorption sites would be higher. The DFT calculation of adsorption model indicated that after activation by Ca(OH) + , the adsorption capacity of BAA on spodumene surface was significantly higher than that of NaOl, while the adsorption strength on feldspar was similar to that of NaOl. This result was corroborated by flotation experiment and adsorption capacity test. Thus, compared with NaOl, BAA could separate and recover spodumene more effectively.
研究领域:
矿物加工工程
·
材料科学与工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2024
·
IF 5.3
Hui Shao,Bingqiao Yang,Huihua Luo,Huanyu Zhu,Ruiqi Ge,Jie Wu
In this study, N-OSS was explored as an efficient collector in the flotation of spodumene from albite. The flotation behaviors were examined by micro-flotation tests and the interaction mechanisms were comprehensively uncovered from atomical scale. It indicated N-OSS could effectively collect spodumene from albite at low temperature and N-OSS was more inclined to adsorb on spodumene surface than that on albite surface, thus significantly expanding the hydrophobicity difference. X-ray photoelectron spectroscopy (XPS) analysis suggested that N-OSS chemically interacted with both Ca and Al active sites on Ca-activated spodumene surface. Whereas, it weakly adsorbed on Ca-activated albite. Density functional theory (DFT) calculations reconfirmed that the adsorption of N-OSS on Ca-activated spodumene surface was more favorable than that on albite surface. The strong adsorption on spodumene was due to the hybridization reaction between the O 2p orbitals of C-O and C=O groups of N-OSS with Ca 4s orbitals as well as Al 3s orbitals on spodumene surface. Nevertheless, N-OSS weakly interacted with Ca atoms on Ca-activated albite due to steric hindrance. N-OSS exhibited selective collecting ability at low temperature in the flotation of spodumene from albite compared with conventional collector, which has promising prospects in the low-temperature flotation of spodumene from albite.
研究领域:
矿物加工工程
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材料科学与工程
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计算化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2024
·
IF 3.2
Shuo Tian,Man Zhou,Hao Yang Shen,Jun Jie Huang,Hao Zhang,Kai Ge Liu,Bin He,Ling Bing Kong
Li 2 O–Al 2 O 3 –SiO 2 (LAS) glass-ceramics have been explored for nearly 80 years, due to their special properties, such as low/negative thermal expansion and high ionic conductivity, thus having commercial significance in various fields. In this study, LAS glass-ceramics based on petalite crystals were developed, which have promising mechanical, thermal properties and compactness, making them potential for applications in hollowwares, tablewares, containers, and plate glass industries. With given ratios of Al 2 O 3 /SiO 2 , the crystalline phase is mainly affected by the concentration of Li 2 O, where the content of Li 2 O must be sufficiently low to form petalite LiAlSi 3 O 8 , thereby avoiding the formation of spodumene LiAlSi 2 O 6 . For this reason, CaF 2 was selected as a nucleating agent to increase the crystallinity of petalite, while the crystallization behavior of LiAlSi 3 O 8 crystals was analyzed in detail. The average transmittance of 3.0 ± 0.2 mm thick glass-ceramics in the visible light region and infrared light region (400–1200 nm) is higher than 85 %. After crystallization at about 770 °C, the crystal size in the glass-ceramics is 100–200 nm, which is relatively dense and has excellent near-zero expansion coefficient. The minimum CTE (25–325 °C) is 1.0992 ppm/ °C, while the mechanical properties such as Vickers hardness, elastic modulus and flexural strength are significantly improved.
研究领域:
材料科学
·
无机非金属材料
✓ 已验证
DOI
高影响因子
MINERALS ENGINEERING
·
2018
·
IF 2.707
Houqin Wu,Jia Tian,Longhua Xu,Shuai Fang,Zhenyue Zhang,Ruan Chi
The flotation separation of spodumene from feldspar was investigated using a new type of mixed anionic/cationic collector, sodium oleate/tributyl tetradecyl phosphonium chloride (NaOL/TTPC). Microflotation experiments, fluorescence spectroscopy measurements, microcalorimetric analysis, and Fourier transform infrared analysis were performed. Microflotation experiments show that the highest flotation separation performance can be achieved at the NaOL:TTPC molar ratio of 5:1 at the pH of 4.0. Fluorescence spectroscopy measurements show that the critical micelle concentration (CMC) of the mixed collector NaOL/TTPC is smaller than either of its components alone. Microcalorimetric results indicate that the difference in adsorption reaction heat between spodumene and feldspar is larger for the mixed collector than either single collector, confirming the former’s separation advantage. Fourier transform infrared analyses show that in the mixed collector, both NaOL and TTPC adsorb on the spodumene surface through chemical interaction and electrostatic attraction, respectively; while only trace amounts of them are adsorbed on the feldspar surface.
研究领域:
矿物加工工程
·
材料科学与工程
✓ 已验证
DOI
高影响因子
MINERALS ENGINEERING
·
2025
·
IF 5
Tengyue Yuan,Yao Guo,Chao Su,Zhiyuan Wang,Aiyan Zuo,Longhua Xu,Jia Tian,Zhoujie Wang,Kaiqian Shu,Donghui Wang,Kai Xue,Yue Cao
Flotation is a technology that utilizes the differences in hydrophobicity of mineral surfaces to selectively adsorb mineral particles onto bubble surfaces. While traditional research predominantly focuses on mineral-reagent adsorption mechanisms, the role of the foam phase in the flotation process remains insufficiently investigated, particularly in mixed collector systems. In this study, the flotation performance of spodumene with different particle sizes in the NaOL/DDA mixed system was investigated from the perspective of foam properties. Flotation experiments on spodumene with different particle sizes demonstrated higher recovery for intermediate particle size; however, the adsorption heat and adsorption capacity of the agents on the surface of its mineral particles are not the highest. This suggests that the flotation performance of minerals with different particle sizes cannot be fully explained by reagent adsorption mechanisms alone. The results of two-phase foam properties analysis revealed that increasing the DDA proportion in the NaOL/DDA mixed system progressively decreased foaming capacity and foam stability. The results of three-phase foam properties analysis demonstrated that intermediate particle size resulted in significantly enhanced foam stability, consistent with observed flotation performance trends. Through zeta potential measurements, optical microscopy observations, and viscosity measurements, the mechanism of foam stability was studied. It was found that the distribution of surface charges on the bubbles regulated the stability of the foams. Electrostatic interactions not only control the flow rate of the liquid layer, but also indirectly regulate the adhesion of particles and bubbles, thereby affecting the flotation effect of minerals. This investigation provides a novel perspective on interpreting flotation phenomena in mixed collector systems.
研究领域:
矿物加工工程
·
界面与胶体化学
·
资源与环境科学
·
浮选药剂作用机制
·
过程强化与分离技术
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Haojun Jiang,Qilong Liao,Yibo Zhou,Laibao Liu,Fu Wang,Hanzhen Zhu,Yong Dan,Peng Zhao,Xianpan Shi
With the rapid development of the lithium battery industry, the resource utilization of lithium slag (LS) has become an urgent issue. Porous ceramic supports are fabricated herein using LS and α-Al 2 O 3 as the primary raw materials, with cornstarch serving as a pore-forming agent. The effects of raw material composition and sintering temperature on the structure and performance of the supports are systematically investigated. The optimal performance is achieved with an LS to α-Al 2 O 3 mass ratio of 6:4, a cornstarch content of 3.0 wt%, and a sintering temperature of 1200 °C. Under these conditions, the ceramic support exhibits an open porosity of 39.0 %, an average pore size of 0.66 μm, and a flexural strength of 40.9 MPa. At a filtration pressure of 0.52 bar, the water flux reaches 8029 L/(m 2 h bar) and the support shows excellent resistance to acidic and alkaline conditions. The turbidity of tap water decreased from 0.53 to 0.28 NTU after filtration, indicating that the ceramic support effectively removed larger suspended particles and improved the quality of the effluent. This study therefore provides a novel approach for the resourceful utilization of LS and offers a cost-effective solution for water treatment.
研究领域:
材料科学
·
陶瓷
·
环境工程
·
废弃物资源化利用
·
水处理
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）