ISIJ INTERNATIONAL
·
2022
·Vol. 62
·期 1
·29-37
·
IF 1.864
Yuxiao Xue,Deqing Zhu,Jian Pan,Zhengqi Guo,Hongyu Tian,Dingzheng Wang,Liaoting Pan
In order to achieve the effective utilization of limonitic nickel laterite for stainless steel production at lower cost, the distinct difference in high-temperature characteristics between limonitic nickel laterite and ordinary limonite has been systematically expounded via compact sintering method and the comparative analysis of the relevant sintering performance at the suitable basicity has also been conducted through sinter pot tests. The results indicate that limonitic nickel laterite possesses much poorer assimilability and liquid phase fluidity due to the abundant high-smelting minerals compared with ordinary limonite. The strength of bonding matrix of limonitic nickel laterite is relatively better as the basicity is not exceed 1.4 while that of ordinary limonite is maintained at a higher level with the basicity of no less than 1.8. Meanwhile, the former is far weaker than the latter due to the much less amount of liquid phase, rather higher porosity and looser microstructure of the bonding matrix. Limonitic nickel laterite is identified as a far more refractory ore for sintering compared with ordinary limonite, further supported by sinter pot tests. It is essential to strengthen limonitic nickel laterite sintering from the standpoints of how to promote the liquid phase formation and densification of the sinter.
研究领域:
冶金学
·
材料科学
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Jie Song,Zhiwen Yuan,Lijun Chen,Yuhua Niu,Zhiqiang Wei
For the effective removal of phenol from the environment, photocatalytic synergistic adsorption is currently one of the key methods. By leveraging the polysaccharide backbone structure of sodium alginate (SA), Zinc hydroxystannate (ZHS) was introduced into the gel structure using a co-precipitation technique. Additionally, gangue waste was repurposed through a polymerization reaction. This approach not only enhanced the specific surface area of the gel material but also compensated for its limited absorption in the visible light spectrum. As a result, the PKSPGM@ZHS was successfully synthesized. The adsorption of Ph by PKSPGM@ZHS in the dark reaction phase aligns with the quasi-second-order kinetic model and the Langmuir model, it shows that this is a spontaneous exothermic process, and its photocatalytic process conforms to the Langmuir-Hinshelwood first-order reaction kinetics model, where ZHS undergoes a series of reactions to generate ·OH radicals from ·O 2 − in the presence of photocatalysis. Ph can be degraded to CO 2 and H 2 O through a series of reactions, thereby achieving complete removal of Ph from wastewater solutions, with a removal rate reaching up to 70 %. After 5 cycles of adsorption/photocatalysis tests, KSPGM@ZHS still h exhibits a high removal efficiency, with the removal rate remaining at 54.26%. This demonstrates its excellent recyclability.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Huili Han,Wanzhong Yin,Bin Yang,Donghui Wang,Jin Yao,Zhanglei Zhu
This work systematically studied the adsorption behavior of sodium oleate (NaOL) on hematite , limonite, and siderite and their corresponding flotation performance at alkaline pH . The adsorption behavior and conformation of NaOL on mineral surfaces were investigated using zeta potential analysis, Fourier-transform infrared (FT-IR) spectroscopy, X-ray photoelectron spectroscopy spectra (XPS), and atomic force microscopy (AFM) imaging characterization. The effect of NaOL adsorption on the surface wettability and bubble-particle attachment was further analyzed by contact angle measurement, attachment time tests, and wrap angle tests. Finally, batch flotation tests and kinetic analysis were carried out to evaluate three mineral flotation behaviors. The results revealed that NaOL could chemically adsorb on hematite, limonite, and siderite and caused the significant negative mobility in their zeta potentials. It was found that Fe atoms exposed on their surface were the main active centers for the chemisorption of NaOL. Hematite and limonite had more active sites for NaOL adsorption than siderite, and Fe(III) on hematite and limonite surface could interact more strongly with NaOL than Fe(II) on siderite, which resulted in the higher adsorption density and intensity of NaOL on hematite and limonite than that on siderite. This further contributed to the stronger hydrophobicity on their surface than that on siderite surface. The enhancement of hydrophobicity could increase the attachment efficiency of bubble-particle ( E a ). Therefore, hematite and limonite particles had more and faster attachment with bubbles than siderite particles. As such, much higher cumulative ultimate recoveries ( R ∞ ) and flotation rate constants ( k ) of hematite and limonite than those of siderite were obtained.
研究领域:
矿物学
·
表面化学
·
浮选工艺
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2025
·
IF 6
Xueming Yin,Jin Yao,Xiufeng Gong,Wanzhong Yin,Jianwei Yu,Yulian Wang
The synchronous flotation separation of limonite from its associated gangue minerals, calcite, and quartz, has long posed a significant challenge in mineral processing. Given that previous studies have focused more on the separation of limonite from single vein minerals or a certain type of vein mineral, as well as the common use of reverse flotation processes. This study innovatively investigated the synchronous positive flotation separation of guar gum (GG) from limonite, silicon containing vein quartz, and calcium containing vein calcite in the sodium dodecyl sulfonate (SDS) system. Flotation test results showed that GG significantly reduced the flotation recovery of calcite and slightly reduced the recovery of limonite and quartz, resulting in a significant flotation difference between limonite and calcite/quartz. Fourier-transform infrared spectroscopy and adsorption quantity tests revealed that in the presence of GG, SDS had weak adsorption ability on the surfaces of quartz and calcite, but strong adsorption on limonite surface. X-ray photoelectron spectroscopy analysis further indicated that GG slightly reduced SDS adsorption at Fe sites on limonite surfaces while substantially hindering SDS adsorption at Ca sites on calcite. Notably, GG showed negligible interference with the weak SDS adsorption at Si sites on quartz surfaces. Extended Derjaguin-Landau-Verwey-Overbeek theory calculations confirmed that the introduction of GG into the SDS system led to mutual attraction between limonite particles and bubbles while inducing mutual repulsion between quartz and calcite particles and bubbles. Therefore, GG significantly improved the separation efficiency of limonite and gangue minerals, and 98.55 % quartz and 84.77 % calcite were removed to achieve synchronous separation of limonite from quartz and calcite.
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
Catalysts
·
2024
·Vol. 14
·期 12
·880
·
IF 3.8
Yaohui Xu,Qin Wang,Yuting Li,Zhao Ding
Based on the photocatalytic activity and magnetic nature of magnetite and goethite, as well as the oxygen storage characteristic of cerianite, a magnetic ternary hybrid composite including cubic CeO2, cubic Fe3O4and orthorhombic FeOOH, designated as Fe3O4/FeOOH/CeO2, was successfully synthesized with different Ce:Fe molar ratios using a simple hydrothermal route without subsequent calcination process, and employed as photocatalysts for the degradation of Acid Orange 7 (AO7) dye. The absorption range of light by the Fe3O4/FeOOH/CeO2composites was broadened, and the intensity was enhanced. Furthermore, there existed a possibility of hybridization and doping among the three crystalline structures, with the elements Ce, Fe and O exhibiting a uniform distribution, significantly enhancing the photocatalytic efficiency of the Fe3O4/FeOOH/CeO2composites in promoting the photodegradation of AO7. The magnetic response behaviors of hybrid composites synthesized with different Ce:Fe molar ratios were investigated. The adsorptive degradation of AO7 in darkness and the photocatalytic degradation of AO7 under UV light illumination were evaluated. Moreover, ten cycling runs of the photocatalytic degradation of AO7 under simulated UV illumination of Fe3O4/FeOOH/CeO2synthesized with a Ce:Fe molar ratio of 1:15 were performed. The hybrid ternary composites were proved to have excellent magnetic sensitivity, exhibited outstanding photocatalytic activities and demonstrated remarkable stability. It is anticipated that magnetic Fe3O4/FeOOH/CeO2ternary hybrid composites may have potential applications in the treatment of organic dye sewage.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2025
·
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
·
资源利用
·
胶体与界面化学
·
冶金工程
·
表面科学
✓ 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）