SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Jieli Peng,Yongxing Zheng,Zhenxing Wang,Zhe Dai,Ziqi Guo
In this study, an innovative method was proposed to treat ilmenite by using sodium persulfate (Na 2 S 2 O 8 ) as a surface activator to enhance the flotation of ilmenite. The action mechanism of Na 2 S 2 O 8 on the ilmenite surface was investigated by micro-flotation, adsorption tests, powder contact angle, zeta potential detection, Fourier transform infrared spectroscopy (FT-IR) analysis and X-ray photoelectron spectroscopy (XPS) analysis. Micro-flotation experiments showed that recovery of the ilmenite was effectively enhanced in the pH range of 4.0 ∼ 10.0 by adding Na 2 S 2 O 8 . The adsorption tests illustrated that the introduction of Na 2 S 2 O 8 effectively enhanced the adsorption of NaOL on the surface of ilmenite. The powder contact angle tests presented that the contact angle of samples increased after treatment with Na 2 S 2 O 8 and NaOL. The zeta potential testing results showed that surface potential of the ilmenite treated with Na 2 S 2 O 8 and NaOL was negatively migrated in the pH ranging from 3.5 to 10.0, revealing that the mineral surface adsorbed more oleic acid anions. FT-IR analyses suggested that the chemical adsorption of oleic acid on the surface of ilmenite was enhanced after treating with Na 2 S 2 O 8 . XPS analyses revealed that the addition of Na 2 S 2 O 8 induced a transformation of Fe (+Ⅱ) into Fe (+Ⅲ) and enhanced adsorption of NaOL on the ilmenite surface. A reaction model of Na 2 S 2 O 8 interacting with the surface of ilmenite was proposed to interpret the activation mechanisms.
研究领域:
矿物加工工程
·
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
MINERALS ENGINEERING
·
2025
·
IF 5
Jiaqiao Yuan,Xiang Gong,Hongyu Lu,Wei Jiang,Hao Lai,Shuming Wen,Shaojun Bai,Dandan Wu
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 performance over 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 2 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.
研究领域:
矿物加工工程
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Lingzhi Zhou,Xian Xie,Xiong Tong,Jing Qi,Ruiqi Xie,Jichang Tu
This study introduced α-Benzoin oxime (BO) as a novel and efficient collector for the selective flotation of ilmenite from diopside. Micro-flotation experiments demonstrated that BO exhibits superior collection performance compared to benzohydroxamic acid (BHA) under weakly acidic to neutral conditions. At pH 8 and a BO dosage of 5× 10 -4 mol/L, flotation tests on ilmenite-diopside mixed minerals achieved a TiO 2 recovery of 89.90 % with a TiO 2 grade of 47.84 %. Contact angle measurements revealed that BO adsorption notably enhances the hydrophobicity of ilmenite surfaces. Zeta potential and FTIR analyses confirmed the selective adsorption of BO onto ilmenite. Furthermore, XPS and TOF-SIMS results indicated that coordination bonds formed between the C–O and C=N–OH groups in BO and Fe(II) ions on the ilmenite surface may facilitate BO adsorption. These findings provide valuable insights into the interaction mechanism between BO and ilmenite, highlighting its potential as an efficient collector for ilmenite flotation.
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
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Jiaqiao Yuan,Hongyu Lu,Xiang Gong,Mingjun Chen,Hao Lai,Shuming Wen,Shaojun Bai,Dandan Wu
The development of high-efficiency beneficiation processes for ilmenite has garnered widespread attention. This study proposed the utilize of a heterogeneous Fenton catalytic technology involving H 2 O 2 and Fe 2+ to enhance ilmenite flotation. The flotation results indicated that pre-oxidation of ilmenite with H 2 O 2 -Fe 2+ before adding collector could recover over 80 % of ilmenite from titanaugite. Electron Paramagnetic Resonance and slurry iron component concentration analyses revealed that the •OH generated within the ilmenite-H 2 O 2 -Fe 2+ catalytic system could oxidize Fe 2+ to Fe 3+ . The stronger binding capability of Fe 3+ with NaOL led to a remarkable discrepancy in floatability between ilmenite and titanaugite. Zeta potential analysis further confirmed that the oxidation degree of the ilmenite surface and the adsorption of iron species were higher than those of titanaugite. Additionally, Time-of-Flight Secondary Ion Mass Spectrometry and X-ray photoelectron spectroscopy analyses provided evidence for the selective activation of ilmenite by the H 2 O 2 -Fe 2+ . Furthermore, Density Functional Theory calculations revealed that the stable adsorption of Fe 2+ and Fe(OH) 2 + offered additional active sites on the ilmenite surface for NaOL adsorption. Moreover, the adsorption of •OH significantly affected the electronic spin density of the Fe 3d orbitals of Fe atom in ilmenite, and played a crucial positive in the surface activity of ilmenite.
研究领域:
矿物加工工程
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化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
·
2018
·Vol. 50
·期 1
·242-250
·
IF 1.834
Xiao Jiusan,Wang Qi,Jiang Bo,Zhu Hongmin
Carbothermic selective reduction of titanium concentrate ore for the preparation of titanium oxycarbide was presented and SiO 2 was found to be partly reduced during the process. The equilibrium relationship between Si dissolved in metallic Fe and SiO 2 existed in corresponding slag was analyzed thermodynamically, and then revealed by a series of designed equilibration experiments. The results are in accordance with the calculated values obtained from thermodynamic analysis and have well explained the phenomenon that part of SiO 2 is reduced during selective reduction processing of titanium concentrate ore.
研究领域:
冶金学
·
材料科学
✓ 已验证
DOI
高影响因子
Minerals
·
2021
·Vol. 11
·期 11
·1242
·
IF 2.644
Qingyao Yu,Fuqiang Tian,Yijun Cao,Guixia Fan,Haiqing Hao,Weijun Peng,Guoli Zhou,Peng Li
Collectors commonly have synergetic effects in ores flotation. In this work, a waste engine oil (WEO) was introduced as a collector to an ilmenite flotation system with sodium oleate (NaOL). The results show that the floatability of ilmenite was significantly improved by using WEO and NaOL as a combined collector. The recovery of ilmenite was enhanced from 71.26% (only NaOL) to 93.89% (WEO/NaOL combined collector) at the pH of 6.72. The optimum molar ratio of NaOL to WEO was about 2.08 to 1. The WEO and NaOL also have synergetic effects for the collection of ilmenite, because to obtain the ilmenite recovery of 53.96%, the dosage of 45 mg/L NaOL is equal to 38.56 mg/L WEO/NaOL combined collector (30 mg/L NaOL + 8.56 mg/L WEO). In other words, 15 mg/L of NaOL can be replaced by 8.56 mg/L of WEO. It is an effective way to reduce the dosage of the collector and reuse WEO. Therefore, it is a highly valuable and environmentally friendly approach for WEO reuse. WEO mainly consists of oxygen functional groups, aromatics, and long-chain hydrocarbons, especially for the RCONH2and RCOOH, thereby forming a strong interaction on the ilmenite surface. The adsorption mechanism of waste engine oil and sodium oleate on the ilmenite surface is mainly contributed by chemical adsorption. Therefore, WEO exhibits superior synergistic power with NaOL as a combined collector. Herein, this work provided an effective collector for ilmenite flotation and a feasible approach for reducing NaOL dosage and recycling WEO.Keywords:ilmenite;flotation;waste engine oil;combined collector;adsorption mechanism
研究领域:
矿物加工工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
MINERALS ENGINEERING
·
2021
·
IF 4.765
Zhitao Yuan,Xuan Zhao,Qingyou Meng,Yunhai Zhang,Yuankai Xu,Lixia Li
Sodium citrate was introduced as a depressant for ilmenite flotation, and its effect on the activation of ilmenite and depressing titanaugite was investigated. The flotation results showed that ilmenite was effectively separated from titanaugite as a concentrate with a TiO 2 grade of 43.62% and recovery of 87.42%. The contact angle analysis revealed that sodium citrate further increased the hydrophobicity of ilmenite and decreased it in the case of titanaugite. The zeta potential results indicated that the adsorbed sodium citrate accelerated the adsorption of sodium oleate on the ilmenite surface, but weakened the adsorption on titanaugite. Inductively coupled plasma mass spectrometry (ICP) and solution chemistry analyses illustrated that sodium citrate improved the flotation of ilmenite and depressed the flotation of titanaugite. Furthermore, X-ray photoelectron spectroscopy (XPS) analysis demonstrated that sodium citrate adsorbed onto ilmenite through Fe 3+ and onto titanaugite through the active sites of Ca and Mg.
研究领域:
矿物加工工程
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Yao Yu,Zhifeng Zhang,Yijun Cao,Wei Sun,Zhiyong Gao,Haisheng Han,Pan Chen,Jian Cao
To improve the separation of ilmenite from its associated gangue mineral titanaugite through selective flotation, a novel hydroxamic acid derivative, N-hydroxy-3-(4-methoxyphenyl) acrylamide (HMPA), was successfully synthesized and evaluated as an efficient collector. Comparative flotation tests demonstrated that HMPA outperformed conventional sodium oleate, achieving superior separation efficiency with a TiO 2 concentrate grade of 48.95 % and an impressive recovery rate of 76.0 %. To understand the underlying mechanisms, the interactions between HMPA and the mineral surfaces were investigated meticulously by adsorption capacity tests, contact angle analysis, FTIR, and XPS. The results of contact angle and adsorption measurements intuitively revealed that HMPA exhibited significantly greater adsorption capacity on the ilmenite surface compared to titanaugite. FTIR and XPS analyses indicated that HMPA adsorbed strongly onto the ilmenite surface through chelation with reactive Ti and Fe sites. Density functional theory (DFT) calculations further suggested that HMPA could act as a bidentate ligand, forming a stable five-membered chelate structure through interactions with the Ti and Fe active sites on the ilmenite surface. In conclusion, HMPA demonstrated outstanding collecting ability and selectivity, making it a highly promising collector for ilmenite flotation.
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
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
·
2025
·
IF 4.7
Pan CHEN,Jia-yan LIU,Ji-hua ZHAI,Yao-hui YANG,Wei SUN
n-octylphosphonic acid (OPA) was introduced as a novel collector for ilmenite flotation and its effectiveness was compared with the conventional chelating collector, benzohydroxamic acid (BHA). Micro-flotation tests demonstrated that OPA was a highly effective and selective collector for separating ilmenite from titanaugite over acidic conditions (optimal pH around 3), which was also supported by adsorption amount measurements. X-ray photoelectron spectroscopy (XPS) tests indicated that the chemisorption of OPA onto ilmenite surface was much stronger than that of BHA. Solution chemistry diagram analyses indicated that OPA could dissociate well at pH 3.0 and mostly exist in anion form. DFT calculations further confirmed that OPA was much easier to adsorb onto ilmenite surface with shorter bond length and lower adsorption energy in comparison with BHA. Therefore, OPA maintained good collecting ability and selectivity for ilmenite flotation in the strongly acidic pulp, providing valuable insights into new collector design and development.
研究领域:
矿物加工工程
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Xuan Zhao,Qingyou Meng,Yuankai Xu,Zhitao Yuan,Yunhai Zhang,Lixia Li
In order to further investigate the mechanism of lead ions in activation ilmenite flotation , the adsorption behaviour of lead ions on ilmenite surface was deeply illustrated using the combination of adsorption amount, zeta potential , inductively coupled plasma mass spectrometry (ICP), energy-dispersive X-ray spectroscopy Mapping (EDS-Mapping), and X-ray photoelectron spectroscopy (XPS) in this study. The results revealed that lead ions activated the ilmenite flotation by promoting the adsorption of sodium oleate. This promotion impact could be attributed to the positive shift of surface charge and the increase in surface active sites after lead adsorption. The changes transferred the adsorption mode of sodium oleate on ilmenite surface into electrostatic adsorption and chemisorption involving double active site (Pb, Fe). The Pb(OH) + was certified as the main active species on activating ilmenite flotation through the analysis of lead adsorption amounts and solution chemistry . Furthermore, the EDS-Mapping and XPS high-resolution spectra analysis evidenced that the Pb(OH) + adsorbed onto the surface sites of O, Fe, and Ti on ilmenite surface by resorting the bridging action of the O atom.
研究领域:
矿物加工工程
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
·
2024
·
IF 2.4
Chen Mao,Dong Xiaosen,Pu Shuiqiang,Tang Wenbo,Zheng Kui
Na 2 O and K 2 O alkaline oxide capacities of TiO 2 -bearing blast furnace slags are critical values for vanadium titanomagnetite blast furnace operation. In this study, high-temperature experiments with fast-quenching were conducted to investigate the effects of TiO 2 concentration, basicity, MgO and Al 2 O 3 concentrations on Na 2 O and K 2 O concentrations in the TiO 2 -bearing blast furnace slags. The results were correlated with optical basicity and also compared with the plant data from one commercial vanadium titanomagnetite blast furnace.
研究领域:
冶金工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Li Yu,Xinyang Xu,Zhitao Yuan,Yuankai Xu
Froth flotation, the main process for separating ilmenite, depends heavily on the performance of flotation reagents. Herein octyl hydroxamic acid (OHA) and lead nitrate served as collector and activator were introduced into the ilmenite-titanaugite flotation system. The adsorption of Pb 2+ on ilmenite and titanaugite surfaces and the subsequent influence on their flotation behaviors were systematically investigated by AFM, FTIR and XPS. Microflotation results showed that Pb 2+ could selectively enhance the floatability of ilmenite rather than titanaugite. Contact angle and AFM measurements verified that OHA selectively adsorbed onto the surface of Pb 2+ -modified ilmenite and increased its hydrophobicity. As characterized by zeta-potential and XPS analyses, lead ions adsorbed onto ilmenite surfaces via chemisorption and physisorption, forming lead-containing complexes, while only Pb 2+ physisorption occurred on titanaugite surfaces. Consequently, the active sites on ilmenite surfaces were dramatically increased and leading to the denser adsorption of OHA collector which contributed to the flotation of ilmenite.
研究领域:
矿物加工工程
·
表面化学
✓ 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）