Mineral Processing and Extractive Metallurgy Review
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2020
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IF 2.785
Zhiyong Gao,Jian Deng,Wei Sun,Jianjun Wang,Yunfeng Liu,Fengping Xu,Qinghong Wang
Scheelite and calcite are usually intergrown calcium minerals that are separated via froth flotation. However, their selective separation remains difficult because of their similar surface properties. 2-phosphonobutane −1, 2, 4-tricarboxylic acid (PBTCA or H5L) is widely used in water treatment due to its low phosphorus content and efficient anti-scaling performance. With its excellent calcium-chelating ability, PBTCA was used as a novel depressant to selectively separate scheelite from calcite in this study. The flotation results of single mineral, binary mixed minerals, and real ore showed that PBTCA could selectively depress calcite at pH 9.0 using sodium oleate as collector. The results of zeta potential measurements, solution chemistry calculation, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and density functional theory calculation indicated that the dominant form of PBTCA was L5-. This anion had a stronger adsorption on negatively charged calcite surfaces through electrostatic interaction. Higher Ca density and stronger Ca activity on calcite promote the adsorption of L5-. Moreover, the active O atoms in L5- could better match with two Ca sites on calcite in the interatom distance. Thus, PBTCA provides a new option for calcite depressants and has great industrial application potential.
研究领域:
矿物加工工程
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表面化学
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材料科学
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DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2025
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IF 5.2
Xueming Yin,Jin Yao,Xiufeng Gong,Jianwei Yu,Wanzhong Yin,Yaowen Cao
Flotation separation of target minerals and gangue minerals has profound significance for the efficient utilization of mineral resources. This study achieved efficient flotation separation of limonite and calcite using sodium dodecyl sulfonate (SDS) as the collector and polycarboxylate superplasticizer (PCE-11) as the inhibitor. The flotation results showed that the separation effect of limonite and calcite was significant at pH 6, SDS concentration of 75 mg/L, and PCE-11 concentration of 40 mg/L, with a maximum flotation difference of 92.86 % between the two minerals. The adsorption quantity test showed that PCE-11 significantly reduced the adsorption quantity of SDS on calcite surface, and the difference in adsorption quantity between limonite and calcite reached 1.0148 mg/g. Zeta potential and infrared spectroscopy analysis indicate that PCE-11 can hinder the adsorption of SDS on calcite surface without significantly affecting the adsorption of SDS on limonite surface, which helps to increase the difference in floatability between limonite and calcite. X-ray photoelectron spectroscopy detection (XPS) analysis demonstrated that PCE-11 selectively hindered the adsorption of characteristic Ca sites on calcite by SDS, but did not affect the adsorption of Fe sites on limonite by SDS. Atomic force microscopy (AFM) detection showed PCE-11 significantly increasing the surface roughness of calcite, slightly increasing the surface roughness of limonite. Therefore, the selective adsorption of PCE-11 on calcite surface hinders the collection of calcite by SDS, increases the difference in floatability between calcite and limonite, and promotes the flotation separation of the two minerals.
研究领域:
矿物加工工程
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资源利用
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胶体与界面化学
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冶金工程
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表面科学
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产品关联
DOI
高影响因子
MINERALS ENGINEERING
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2021
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IF 4.765
Zheyu Huang,Jingzhong Kuang,Luping Zhu,Weiquan Yuan,Zhilei Zou
The effect of ultrasound on the solution properties and microstructure of benzohydroxamic acid (BHA) were investigated to separate scheelite from calcite effectively in this study. The influence of ultrasound-treated BHA on flotation kinetics, surface properties and the adsorption heat of reagents and minerals was discussed. The results show that the difference in the flotation rate between scheelite and calcite was significantly increased by ultrasound-treated BHA. The grade and recovery rate of tungsten concentrate were increased and the flotation time was reduced, which resulted in the rapid separation of scheelite and calcite. Ultrasonic effects significantly increased the adsorption amount, adsorption rate and contact on the surface of scheelite with BHA, which have no noticeable effects on the surface of calcite. The adsorption heat of the interaction between BHA and scheelite was significantly increased by ultrasound due to the increase in the adsorption rate of scheelite on BHA. The ultrasonic effect promotes the dissociation of BHA in solution and the formation of a fine droplet structure, reduces the surface tension, resulting the decrease in the adhesion work and induction time between BHA and scheelite.
研究领域:
矿物加工工程
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表面化学
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DOI
高影响因子
Minerals
·
2018
·Vol. 8
·期 8
·313
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IF 1.835
Jianjun Wang,Zihan Zhou,Yuesheng Gao,Wei Sun,Yuehua Hu,Zhiyong Gao
Fluorite (CaF2), as an important strategic mineral source, is usually separated from calcite by the common froth flotation method, but this separation is still not selective enough. The development of a selective collector and/or depressant is the key to achieving high selective separation. 1-Hydroxyethylidene-1,1-diphosphonic acid (HEDP or H4L) is widely used as an environmentally friendly water treatment reagent due to its low cost and excellent anti-scaling performance in an aqueous solution. In this study, a novel reagent scheme was developed using HEDP as a fluorite depressant and sodium oleate (NaOL) as a calcite collector for the first time. When 3 × 10−5mol/L of HEDP and 6 × 10−5mol/L of NaOL were used at pH 6, the optimal selective separation for single minerals and mixed binary minerals was obtained. Zeta potential measurements indicated that HEDP possessed a stronger adsorption on fluorite than calcite, while NaOL did the opposite. This novel reagent scheme is of low cost, uses a small dosage, and is friendly to the environment, which makes it a promising reagent scheme for fluorite flotation in industrial application.Keywords:fluorite;calcite;flotation;1-hydroxyethylidene-1,1-diphosphonic acid;sodium oleate
研究领域:
矿物加工工程
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环境科学
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产品关联
DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
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2018
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IF 3.398
Bo Feng,Jinxiu Peng,Wei Guo,Guodong Luo,Wenpu Zhang,Huihui Wang
The separation of scheelite and calcite by froth flotation is difficulty as these two minerals have similar physicochemical characteristics. To solve this problem, the role of carboxymethyl chitosan in the flotation separation of scheelite from calcite has been studied and the depression mechanism has been discussed. Micro-flotation tests show that carboxymethyl chitosan has strong depression effect on calcite and the depression effect decreased with the increase of pH. However, its depression effect on scheelite is weak. A concentrate with WO 3 grade of 65.21% and WO 3 recovery of 77.48% can be achieved in the mixed minerals flotation when carboxymethyl chitosan was used. The adsorption tests show that carboxymethyl chitosan has adsorbed on the calcite surface and the adsorption amount increased with the increase of added amount. The adsorption mechanism of carboxymethyl chitosan on calcite surface was analyzed through the X-ray photoelectron spectroscopy (XPS) tests and the results revealed that carboxymethyl chitosan adsorbed on calcite surface mainly through chemical interaction.
研究领域:
矿物加工
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材料科学
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化学工程
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Ruolin Wang,Wenjuan Sun,Haisheng Han,Wei Sun,Zhao Wei,Jian Peng
The flotation separation of scheelite from fine calcite is difficult due to the larger specific surface area and higher activity with flotation collectors. The selectivity of caustic starch as the depressant is poor, due to the -OH functional group reacting with the similar Ca 2+ active sites of scheelite and calcite. In this paper, a novel structure of Al-caustic starch is prepared by the reaction of Al 3+ and caustic starch, which has a new functional group of -CH 2 -O-Al 2+ . The Al-caustic starch is an effective depressant for the fine calcite particles, contributing to the efficient flotation separation of scheelite from the fine calcite particles. All the flotation kinetics of scheelite and fine calcite is first-order uniform distribution model, and the flotation rate of calcite decreases significantly after the treatment of Al-caustic starch. The zeta potential of Al-caustic starch is much higher than that of caustic starch, and Al-caustic starch can selectively change the surface charge of fine calcite, instead of scheelite. The X-ray photoelectron spectroscopy (XPS) spectrum of Al-caustic starch appears the peak of Al atom, which chemisorb on the calcite surface and make the peak of characteristic atoms shift. Moreover, Al-caustic starch reacts with the anion of CO 3 2- on fine calcite surface, instead of cation of Ca 2+ , which obviously improves the selective adsorption on mineral surface.
研究领域:
矿物加工工程
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化学工程与技术
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产品关联
DOI
高影响因子
Results in Engineering
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2025
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IF 7.9
Junqi Jiang,xinyang yu,Feng Wu,Yanbo Zhong,Guichun He,Zhilin Liu
As a strategically significant non-metallic mineral resource, fluorite faces considerable challenges in its flotation separation from associated calcite due to their highly similar surface properties and nearly identical responses to conventional reagents. Traditional depressants not only demonstrate inadequate selectivity in distinguishing these calcium-containing minerals but also raise environmental concerns. This study introduces guar gum (GG), a natural polysaccharide derived from renewable plant sources, as a highly selective depressant for calcite in fluorite flotation using sodium oleate (NaOL) as the collector. Systematic flotation tests revealed that GG strongly depresses calcite flotation while minimally affecting fluorite floatability. At an optimized concentration of 25 mg/L GG, calcite recovery drastically decreased to only 2.5%, while fluorite recovery remained at approximately 85%, demonstrating exceptional selectivity. Artificial mixed-ore flotation tests under carefully optimized conditions successfully upgraded the CaF 2 grade from 49.72% to 79.48% with a fluorite recovery of 92.25%, confirming practical separation efficiency. Surface analysis through multiple characterization techniques verified that GG selectively adsorbs on calcite surfaces, rendering them hydrophilic and effectively blocking subsequent NaOL adsorption. Fourier transform infrared spectroscopy and density functional theory simulations provided crucial molecular-level insights, consistently revealing GG's significantly stronger adsorption affinity and more favorable interaction energy with calcite compared to fluorite. These fundamental findings offer a comprehensive molecular-level explanation for the observed differential flotation behavior. This research validates GG as an efficient, highly selective, and environmentally friendly depressant that enables effective separation of fluorite from calcite, providing a sustainable alternative to conventional reagents in mineral processing operations.
研究领域:
矿物加工
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浮选化学
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表面科学
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可持续采矿
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Xiaoyu Cao,Jihui Luo,Xiaoping Huang,Jianxian Zeng,Zhanfang Cao
Synthesis and application of a novel salicylaldoxime (EASA) for separating malachite from calcite. • The molecular behaviour of EASA and SAO were investigated. • EASA exhibited superior collecting ability and selectivity for malachite against calcite than SAO. • EASA chemisorbed on the malachite surface by formation of a six-membered chelate ring. In this paper, a novel surfactant, 4-(diethylamino)salicylaldoxime (EASA), was synthesized by introducing a diethylamino group into the salicylaldoxime (SAO) molecule, and its first application as a collector for the flotation separation of malachite from calcite. The interfacial adsorption behavior of EASA on malachite and its selectivity for malachite versus calcite were systematically investigated. DFT calculations revealed that the incorporation of the diethylamino group enhances the chelating ability of the salicylaldoxime molecule. Moreover, EASA demonstrated strong selective adsorption on malachite, which significantly increased its surface hydrophobicity, whereas its interaction with calcite was weak and exerted a negligible effect on calcite’s hydrophobicity. Such adsorption selectivity resulted in superior flotation performance, with a significantly larger recovery difference between malachite and calcite compared with conventional collectors including SAO and OHA. Mechanistic studies indicated that EASA chemisorbs onto the malachite surface via the formation of a six-membered chelate ring (−C–O–Cu(I)–N–C–), involving coordination between surface Cu(II) ions and both the –OH and C=N groups of EASA. Download: Download high-res image (158KB) Download: Download full-size image
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DOI
高影响因子
Minerals
·
2020
·Vol. 10
·期 3
·282
·
IF 2.38
Wenliang Xiong,Jie Deng,Kaile Zhao,Weiqing Wang,Yanhong Wang,Dezhou Wei
The flotation of bastnaesite, as a major mineral source of rare earth elements, attracting much attention in the mineral processing field, is challenging owing to the natural flotability of calcium-bearing minerals. To promote the application of flotation, we systematically investigated the flotation behavior of bastnaesite, barite, and calcite, with salicylhydroxamic acid (SHA) as the collector through micro-flotation experiments, zeta-potential measurements, Fourier transform infrared (FT-IR) analyses, X-ray photoelectron spectroscopy (XPS) analyses, and solution chemistry analyses. Micro-flotation experiments confirm that the flotability of bastnaesite is high at pH 6.5–8.5, while calcite floats at pH 8.0–9.5, and barite has little flotation response. The results of FT-IR, XPS, and zeta-potential measurements indicate that there is chemical adsorption of SHA on the bastnaesite surface, and physical adsorption also occurs. However, as for barite and calcite, there is only physical adsorption of SHA on the surfaces. The solution chemistry results show that SHA anions can interact with RE3+, REOH2+, and RE(OH)2+on bastnaesite surfaces in aqueous suspensions, resulting in bastnaesite flotation.Keywords:bastnaesite;barite;calcite;salicylhydroxamic acid;flotation
研究领域:
矿物加工工程
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化学工程
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
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2019
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IF 3.973
Li Li,Yang Yang,Yirui Lv,Ping Yin,Ting Lei
Porous CaCO 3 microspheres are nowadays extensively used as a drug delivery system due to their excellent biocompatibility and degradability. However, the stability of vaterite CaCO 3 microspheres is a major problem as a drug carrier. In this work, porous calcite CaCO 3 microspheres are fabricated by calcination of gelatin-CaCO 3 composite microspheres at 550 °C in air. The size and morphology of CaCO 3 microspheres could be well regulated by the addition of gelatin. The structure of the as-prepared porous calcite CaCO 3 microspheres is characterized by scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). Compared with vaterite CaCO 3 microspheres, porous calcite CaCO 3 microspheres are more stable and exhibit good drug-loading and drug release properties for doxorubicin (DOX), an effective anticancer agent. This study provides an easy and novel approach to prepare stable porous calcite CaCO 3 microspheres, which show promising potential as a carrier for DOX.
研究领域:
材料科学
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药学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
MINERALS ENGINEERING
·
2022
·
IF 5.479
Binbin Li,Qing Shi,Dezhi Liu,Saizhen Jin,Qingyun Luo,Zejun Wang
Recent studies on calcite have shown that newly precipitated clusters of amorphous calcium carbonate (ACC) and vaterite in pulp change the inherent reactivity of the calcite surface. The flotation recovery and surface zeta potential of calcite undergo rapid changes during the initial reaction time but are slightly altered after 60 min. In order to further understand the adverse effects of newly precipitated CaCO 3 on the flotation of calcite, the relationship between the recrystallization process of nascent calcium carbonate (CaCO 3 ) and the flotation behavior of calcite was explored under different time conditions in this study. Accordingly, during the recrystallization process, the intensity of the chemical reaction between ACC–vaterite–calcite and hexametaphosphate (SH) was found to gradually weaken through the flotation test, SEM, XRD and FTIR . Furthermore, due to the difference in crystal structure, ACC and vaterite were shown to strengthen the reactivity of SH and Ca 2+ on the surface of calcite in flotation through the zeta potential test and X–ray photoelectron spectroscopy (XPS), thereby weakening the ability of oleate (OL − ) in collecting the mineral.
研究领域:
矿物学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
·
IF 5.2
Shuai Liu,Cheng Zhang,Jiaxin Du,Hai Huang,Shenwen Fang,Xinliang Li,Ming Duan
The surface modification of calcite has been widely used to improve the compatibility of calcite with non-polar solutions, but this method is complex, time-consuming and uneconomical. Thus, we propose to use dispersants for improving the compatibility of calcite with non-polar solutions and systematically study the dispersion effect and mechanism of various dispersants. Anionic bis (2-ethylhexyl) sulfosuccinate sodium (AOT), non-ionic sorbitol monooleate sodium (Span 80) and sorbitol trioleate (Span 85), cationic cetyltrimethylammonium bromide (CTAB), oleic acid (OA) and stearic acid (SA), are used to change the surface properties of calcite in nonpolar solutions. The results of sedimentation and rheology showed that the anionic dispersant AOT had the best dispersion performance and efficiency. All dispersants, except CTAB, can significantly improve the wettability of particle surface, and the calcite adsorbed AOT has the best hydrophobicity . XRD results showed that all dispersants were adsorbed on the surface of calcite. FT-IR and XPS confirmed that AOT adsorbed on the particle surface through the coordination between AOT and Ca 2+ . Zeta potential shows that the calcite system with anionic AOT has the highest surface charges, indicating that the strong electrostatic interaction is one reason of the stabilization of calcite particles. This work has guiding implications for the selection of dispersants to improve the compatibility of calcite with non-polar solvents.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）