Journal of Central South University
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2025
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IF 4.4
Zhu Qiang,Yang Jian-guang,Nan Tian-xiang,Zeng Wei-zhi,Tang Shi-yang,Liu Jiang,Zhang Yan,Tang Chao-bo
The goethite residue generated from zinc hydrometallurgy is classified as hazardous solid waste, produced in large quantities, and results in significant zinc loss. The study was conducted on removing iron from FeSO 4 -ZnSO 4 solution, employing seed-induced nucleation methods. Analysis of the iron removal rate, residue structure, morphology, and elemental composition involved ICP, XRD, FT-IR, and SEM. The existing state of zinc was investigated by combining step-by-step dissolution using hydrochloric acid. Concurrently, iron removal tests were extended to industrial solutions to assess the influence of seeds and solution pH on zinc loss and residue yield. The results revealed that seed addition increased the iron removal rate by 3%, elevated the residual iron content by 6.39%, and mitigated zinc loss by 29.55% in the simulated solution. Seed-induced nucleation prevented excessive nuclei formation, fostering crystal stable growth and high crystallinity. In addition, the zinc content of surface adsorption and crystal internal embedding in the residue was determined, and the zinc distribution on the surface was dense. In contrast, the total amount of zinc within the crystal was higher. The test results in the industrial solution demonstrated that the introduction of seeds expanded the pH range for goethite formation and growth, and the zinc loss per ton of iron removed was reduced by 50.91 kg (34.12%) and the iron residue reduced by 0.17 t (8.72%).
研究领域:
冶金学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS SCIENCE FORUM
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2020
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IF 0
Fei Fei Li,Xue Song Jiang,Jing Wei Li,Bo Yuan Ban,Jian Chen
The one of major impurities in quartz is iron, which has a great impact on the properties of the material and should be be strictly removed in many applications. In this study, a low-energy consumption, simple, fast processing is introduced by combination microwave treatment with different acid leaching. Selective heating of microwaves is used to process quartz, causing local phase changes to improve the purification effect. Acid leaching was used to remove the iron in the quartz matrix. Under optimized conditions, the iron content can be reduced to below 0.167 ppmw with one single purification pass.
研究领域:
材料科学
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化学工程
✓ 已验证
DOI
ISIJ INTERNATIONAL
·
2018
·Vol. 58
·期 7
·1361-1367
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IF 1.35
Jia-yun Wang,Hong-juan Li,Lei Li,Hua Wang,Yu Wang,Yong Yu
A process of removing iron from copper-based alloy scraps using oxidation slagging method is researched, in which the iron is oxidized to FeO and then reacted with SiO2 forming Fe2SiO4 and enter into the slag phase. The addition of SiO2 could restrict the Fe3O4 generation through the transformation of FeO to 2FeO·SiO2 in a certain O2 pressure, which is favorable to decreasing the melt viscosity and increasing the separation efficiency of Cu and Fe. Under optimized conditions of O2 flow rate of 40 ml/min, temperature of 1673 K, oxygenation time of 8 min, and SiO2 amount of 2.17 mass%, Fe content in the metal phase is decreased to 0.0030 mass% with Cu loss rate being of 1.14%.
研究领域:
冶金工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOM
·
2024
·Vol. 76
·期 12
·7398-7406
·
IF 2.1
Peng Xiaohua,Sun Pu,Lu Zhanqing,Yang Rongjing,Li Xingbin,Wei Chang,Deng Zhigan,Li Minting
In the Lanping lead–zinc mine area, hazardous jarosite residue produced by the jarosite process seriously threatens the remaining capacity of the tailings pond and the local ecological environment. Therefore, the hematite process has been recommended as an alternative to the jarosite process to overcome the challenge of the hazardous jarosite residue. The recommended reaction conditions for the hematite process are: initial pH = 3.0–4.5, reaction temperature = 150°C, oxygen partial pressure = 0.4 MPa, agitation speed = 500 rpm, and reaction time = 3 h. For the zinc leaching solution containing about 19 g/L Fe 2+ , the Fe concentration after iron removal via the hematite process was reduced to 2 g/L, and the corresponding iron removal efficiency reached 89%. The Fe content in the hematite product is higher than 55%, and the Zn loss and S pollution in the hematite products were below 1% and 3%, respectively. According to the China Non-Ferrous Metals Association for group standard (T/CNIA 0147-2022), the hematite products produced in this study reached the third grade and can be sold as steelmaking raw materials. Therefore, iron ions in zinc leaching solution can be resourced through the hematite process so as to avoid the stockpiling of iron removal residue. The challenges posed by the limited storage capacity of the tailings pond and the threat of jarosite residue to the local ecology can thus be perfectly solved.
研究领域:
冶金工程
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环境科学
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矿物加工工程
✓ 已验证
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DOI
高影响因子
HYDROMETALLURGY
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2023
·
IF 4.7
Changye Mang,Guanghui Li,Yanhu Chen,Jun Luo,Mingjun Rao,Tao Jiang
Partial neutralization is typically used to remove Fe 3+ ions from the acid leach solution of laterite. However, during this process, significant amounts of Mg 2+ , Ni 2+ , Co 2+ , and SO 2– 4 are lost. With increasing initial Fe 3+ concentration and solution pH, the severity of loss increases, with the precipitation of Fe 3+ . In this study, the mechanisms of ion co-precipitation during partial neutralization were investigated. Based on density functional theory calculations, a precipitation pathway through the formation of [Fe 4 (OH − ) 2 (SO 2– 4) 4 ]•[2SO 2 – 4 •yH 2 O]•[M 2+ ] was proposed. The differential charge density diagram indicated that the O atoms acted as the charge acceptors and maintained the precipitate structure. The coordination between M 2+ and SO 2– 4 could be destroyed via intense agitation, releasing approximately 100% of Mg 2+ , Ni 2+ , and Co 2+ ions from the precipitates to the solution. Furthermore, the addition of cationic or anionic surfactants limited the formation of these coordination bonds. The highest retention percentages of Mg 2+ , Ni 2+ , and Co 2+ in solution were 99.4, 99.6, and 99.9%, respectively, after adding 2 × 10 −5 mol/L of sodium dodecylbenzenesulfonate (CTAB). In addition, a high temperature could break these coordination bonds. The retention percentages of Mg 2+ , Ni 2+ , and Co 2+ increased from 82.6, 85.2, and 86.5% to 99.9, 99.6, and 99.8%, respectively, as the temperature increased from 25 to 65 °C. These results confirmed the rationality of the proposed structure of the precipitate.
研究领域:
化学工程
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材料科学
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环境化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2013
·
IF 3.473
Shanshan Zhao,Peng Wang,Ce Wang,James L. Langer,Gulizhaer Abulikemu,Xin Sun
The purification and reclaiming of synthetic and industrial high temperature condensed water containing excess oil and iron is investigated in this study using thermostable poly(phthalazine ether sulfone ketone) (PPESK) ultrafiltration membranes. The results show operation parameters such as transmembrane pressure, temperature and pH of feed solution, initial oil and iron concentration each play important roles in the permeate flux and oil/iron removal efficiencies. Membrane performance is almost recovered after washing with a combination of NaOH and ethanol. High temperature condensed water from Daqing petroleum refinery can be consecutively purified using a PPESK ultrafiltration membrane. The turbidity of the solutions is almost removed. Oil and iron concentrations in the permeate solutions are below 1 mg/L and 50 μg/L, respectively, which satisfy the Quality Criterion of Water and Steam for Steam Power Equipment in China. UF process shows a promising alternative to existing technology in the Daqing petroleum refinery in terms of cost and environmental protection as well as energy recovery. For future possible combination of UF and NF process application, both economic cost and saving are evaluated, and the breakeven time is about 11 months.
研究领域:
化学工程
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环境科学
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水处理
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膜技术
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2012
·
IF 2.59
Shanshan Zhao,Peng Wang,Ce Wang,Xin Sun,Linhuan Zhang
Poly (phthalazine ether sulfone ketone) (PPESK)/TiO 2 organic–inorganic composite ultrafiltration (UF) membranes with enhanced performance for high temperature condensed water treatment were prepared using a phase-inversion method. The effects of TiO 2 concentration on the membrane morphologies, physic-chemical properties, membrane permeability and antifouling performance were investigated and discussed. The SEM result reveals that the penetrated finger-like structure in sublayer is suppressed, and sponge-like structure begins to be developed. The mechanical strength and thermal stability of composite membrane are improved due to the existence of hydrogen bond between TiO 2 and polymer. The permeate flux is also enlarged due to the improved hydrophilicity and porosity. Compared with neat PPESK membrane, the composite membranes present improved antifouling properties, showing lower filtration resistances, MFI values and better flux recover property during high temperature condensed water treatment. The optimal addition amount of TiO 2 is 2 wt.%. The high temperature condensed water with excess oil and iron can be treated efficiently using PPESK/TiO 2 composite membrane. The turbidity of feed solution is almost removed. The oil and iron concentrations in permeate solution are 0.89 mg/L and 26.4 μg/L which meet the Quality Criterion of Water and Steam for Steam Power Equipment in China.
研究领域:
材料科学
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环境工程
·
膜技术
·
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）