Oxidative hydrolysis of Fe(Ⅱ) in the process of hydrothermal synthesis of hematite
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Fuxian Yang
,
Chang Wei
Abstract
Iron removal is an important step in zinc hydrometallurgy, and hematite process not only can effectively remove iron, but also is environmentally friendly and has certain economic benefits, so it has great application potential in zinc hydrometallurgy. The oxidative hydrolysis of Fe(Ⅱ) was studied by the change of ions in solution with different initial ferrous ion concentration. Meanwhile, the oxidation rates of Fe(Ⅱ) at different initial Zn(Ⅱ) concentrations were also studied. The results show that temperature has an important influence on the oxidative hydrolysis of Fe(Ⅱ). Increasing the temperature can inhibit the formation of complex and make more Fe(Ⅱ) precipitate directly in the form of hematite, which is not limited by the hydrolysis rate of Fe(Ⅲ). The oxidation reaction of Fe(Ⅱ) approximately conforms to the second order reaction rate. Zinc sulfate can promote the oxidation of Fe(Ⅱ). When the initial Zn(Ⅱ) concentration was 20, 40, 60 and 80 g/L, the oxidation kinetic constants of Fe(Ⅱ) were 2.433, 4.492, 10.106 and 14.857 L·mol−1·min−1, respectively.
Funding source: National Natural Science Foundation of China 10.13039/501100001809
Award Identifier / Grant number: 51804146
Award Identifier / Grant number: 51964029
Award Identifier / Grant number: 51664030
Award Identifier / Grant number: 51564030
Funding source: National Key Research Development Program of China
Award Identifier / Grant number: 2018YFC1900402
Funding source: Applied Basic Research Project of Yunnan Province in China
Award Identifier / Grant number: 202001AT070079
Funding source: Analysis and Test Fund of Kunming University of Science and Technology 10.13039/501100005194
Award Identifier / Grant number: 2020M20192102028
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Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
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Research funding: This study was financially supported by the National Natural Science Foundation of China (grant numbers 51804146, 51964029, 51664030 and 51564030); the National Key Research Development Program of China (grant number 2018YFC1900402); the Applied Basic Research Project of Yunnan Province in China (grant number 202001AT070079); and the Analysis and Testing Fund of Kunming University of Science and Technology, China (grant number 2020M20192102028).
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Conflict of interest statement: No conflict of interest exits in the submission of this manuscript, and manuscript is approved by all authors for publication. I would like to declare on behalf of my co-authors that the work described was original research that has not been published previously and not under consideration for publication elsewhere in whole or in part. All the authors listed have approved the manuscript that is enclosed.
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Articles in the same Issue
- Frontmatter
- Review
- Nanoreactors: properties, applications and characterization
- Articles
- Numerical simulation of the particle-wall collision strength and swirling effect on the performance of the axial flow cyclone separator
- Development and experimental validation of reactor kinetic model for catalytic cracking of eugenol, a potential bio additive fuel blend
- Effect of flue gas components on the NO removal and element mercury oxidation performance of Mn-modified low-temperature catalyst
- CFD analysis and RSM optimization of obstacle layout in Tesla micromixer
- Non-invasive morphological characterization of cellular loofa sponges using digital microscopy and micro-CT
- Residence time distribution studies on recycle reactor with recirculation
- The influence of membrane electrode assembly’s pressing on PEM fuel cell’s performance
- Oxidative hydrolysis of Fe(Ⅱ) in the process of hydrothermal synthesis of hematite
- Parametric numerical study and optimization of mass transfer and bubble size distribution in a gas-liquid stirred tank bioreactor equipped with Rushton turbine using computational fluid dynamics
Articles in the same Issue
- Frontmatter
- Review
- Nanoreactors: properties, applications and characterization
- Articles
- Numerical simulation of the particle-wall collision strength and swirling effect on the performance of the axial flow cyclone separator
- Development and experimental validation of reactor kinetic model for catalytic cracking of eugenol, a potential bio additive fuel blend
- Effect of flue gas components on the NO removal and element mercury oxidation performance of Mn-modified low-temperature catalyst
- CFD analysis and RSM optimization of obstacle layout in Tesla micromixer
- Non-invasive morphological characterization of cellular loofa sponges using digital microscopy and micro-CT
- Residence time distribution studies on recycle reactor with recirculation
- The influence of membrane electrode assembly’s pressing on PEM fuel cell’s performance
- Oxidative hydrolysis of Fe(Ⅱ) in the process of hydrothermal synthesis of hematite
- Parametric numerical study and optimization of mass transfer and bubble size distribution in a gas-liquid stirred tank bioreactor equipped with Rushton turbine using computational fluid dynamics
