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Juhua Zhang
The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China

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Short Biography

PhD. Associate Professor, E-mail: [email protected]; Mobile phone: +86 13171472323Wuhan University of Science and Technology, Wuhan, Hubei Province, P.R. China 430081 EducationDoctor of Engineering Major in Non-ferrous Metallurgy, 2011.09 – 2014.11Department of Non-ferrous Metallurgy, Northeastern UniversityThesis: A Cleaner Process for Preparation of V2O5 from Converter Vanadium SlagMaster of Engineering Major in Chemical Engineering, 2007.09 – 2009.07Department of Non-ferrous Metallurgy, Northeastern UniversityThesis: Separation of Rutile Phase in the Modified High Titanium SlagBachelor of Science Major in Environmental Engineering, 2003.09 – 2007.07College of Food Engineering, Harbin University of Commerce ExperienceAssociate Professor - Wuhan University of Science and Technology, 2019.12-Lecturer – Wuhan University of Science and Technology, 2014.11 – 2019.12Working in School of Materials and MetallurgyCourses taught to undergraduates: Non-ferrous Metallurgy, Non-ferrous Metallurgy Equipments, Introduction to Metallurgy (for freshman), Introduction to Iron and Steel Metallurgy, Courses taught to graduates: New Technology of Metallurgical Raw MaterialsAdvisor: Metallurgical Simulation Practice Engineer – Panzhihua Iron & Steel Research Institute, 2009.07 – 2011.07Worked as a researcher mainly in these projects:ⅰ Development of R289 High-grade Rutile Titanium Dioxide Product;ⅱ Research on Continuous Acid Hydrolysis Technology of Titanium Slag

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Journal article
Published: 13 April 2021 in Metals
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Calcified roasting followed by dilute sulfuric acid leaching is a promising process for cleaner vanadium extraction from converter vanadium slag. However, some impurities, like Ca, Mg, Mn, Si and Al, also transfer into the leaching solution, accompanying V during the dilute sulfuric acid leaching, leading to the product of vanadium pentoxide prepared from this acidic vanadium-bearing solution, inferior to the product from the traditional process of sodium roasting and water leaching. A chemical precipitation method was firstly proposed to purify this acidic vanadium-bearing solution with a new prepared remover of MnNH4F3, which combines neutralization and fluoride precipitation into one operational step to remove impurities of Ca2+, Mg 2+, Al3+ and Si4+ in an acidic pH range, simultaneously. Effecting factors involved in the purification process were investigated. It was found that removals of Ca, Mg and Al were all over 95% and around 55% of Si was removed as well at stirring speed of 200 rpm, adding coefficient of 1.6, temperature of 50 °C, reaction time of 30 min and pH of 4.50 ± 0.05, while the loss of vanadium was kept lower than 5%, which was attributed to the reason that the purification reactions mainly proceeded on the surface of the remover. Adding flocculant of polyacrylamide was conductive to accelerating sedimentation of the precipitate and reducing the loss of vanadium. Meanwhile, the filter aid of diatomaceous could improve the filtration performance of the slurry. Ammonium persulfate could effectively oxidize and separate Mn2+ in the form of MnO2 from the vanadium-bearing solution which had been treated by MnNH4F3, but performed less selectivity over Mn2+, and the loss of vanadium was unacceptable. The product of vanadium pentoxide prepared from the purified vanadium-containing solution satisfied the requirements for the standard of grade 98.

ACS Style

Juhua Zhang; Wei Zhang; Chengzhi Li. Purification of the Acidic Vanadium-Bearing Solution with a Novel Approach of Chemical Precipitation. Metals 2021, 11, 625 .

AMA Style

Juhua Zhang, Wei Zhang, Chengzhi Li. Purification of the Acidic Vanadium-Bearing Solution with a Novel Approach of Chemical Precipitation. Metals. 2021; 11 (4):625.

Chicago/Turabian Style

Juhua Zhang; Wei Zhang; Chengzhi Li. 2021. "Purification of the Acidic Vanadium-Bearing Solution with a Novel Approach of Chemical Precipitation." Metals 11, no. 4: 625.

Journal article
Published: 25 December 2018 in Metals
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Converter vanadium slag is a byproduct of the iron making process when the vanadium titanomagnetite is used as iron raw material. A cleaner process including calcified roasting, dilute acid leaching, precipitation purification, vanadium precipitation with ammonium salt, followed by thermal decomposition was proposed to extract vanadium resource from this slag. And then vanadium pentoxide with purity over 98% was prepared, which can be used as additives for high strength low alloy steel production. A total vanadium recovery beyond 80% was achieved in this whole process. Since no sodium and potassium salt was introduced, wastewater generated was closed-circulating after removing the enriched impurities of P, Si, Ti and Cr with adding powder CaO. The content of V2O5 in residues after vanadium extraction was lower than 1.2 wt.%, while other valuable metals like Fe, Mn, Cr and Ti were concentrated. With no alkaline metal salts added in this process, the metal resources of Fe, Mn, Cr and Ti in the residues were more feasible to be recovered with pyrometallurgy processes.

ACS Style

Juhua Zhang; Wei Zhang; Zhengliang Xue. An Environment-Friendly Process Featuring Calcified Roasting and Precipitation Purification to Prepare Vanadium Pentoxide from the Converter Vanadium Slag. Metals 2018, 9, 21 .

AMA Style

Juhua Zhang, Wei Zhang, Zhengliang Xue. An Environment-Friendly Process Featuring Calcified Roasting and Precipitation Purification to Prepare Vanadium Pentoxide from the Converter Vanadium Slag. Metals. 2018; 9 (1):21.

Chicago/Turabian Style

Juhua Zhang; Wei Zhang; Zhengliang Xue. 2018. "An Environment-Friendly Process Featuring Calcified Roasting and Precipitation Purification to Prepare Vanadium Pentoxide from the Converter Vanadium Slag." Metals 9, no. 1: 21.

Journal article
Published: 01 August 2017 in Journal of Iron and Steel Research International
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ACS Style

Wei Zhang; Zheng-Liang Xue; Ju-Hua Zhang; Wei Wang; Chang-Gui Cheng; Zong-Shu Zou. Medium oxygen enriched blast furnace with top gas recycling strategy. Journal of Iron and Steel Research International 2017, 24, 778 -786.

AMA Style

Wei Zhang, Zheng-Liang Xue, Ju-Hua Zhang, Wei Wang, Chang-Gui Cheng, Zong-Shu Zou. Medium oxygen enriched blast furnace with top gas recycling strategy. Journal of Iron and Steel Research International. 2017; 24 (8):778-786.

Chicago/Turabian Style

Wei Zhang; Zheng-Liang Xue; Ju-Hua Zhang; Wei Wang; Chang-Gui Cheng; Zong-Shu Zou. 2017. "Medium oxygen enriched blast furnace with top gas recycling strategy." Journal of Iron and Steel Research International 24, no. 8: 778-786.

Articles
Published: 16 February 2017 in Mineral Processing and Extractive Metallurgy Review
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The isothermal and non-isothermal oxidation kinetics of a converter vanadium slag in the presence of calcium oxide was studied using thermal analysis. The isothermal experimental data for the whole oxidation process are described in terms of the equation [1− (1−α)2/3] = kt with Ea = 20.42 kJ mol–1 at lower temperatures of 400-500 °C, and described by [(1−α)–1/3−1]2 = kt with Ea = 227.66 kJ mol–1 at temperature higher than 500 °C. In the nonisothermal oxidation study, heating rate greatly affects the oxidation process. Using a heating rate of 3 °C min–1 results in overlapping oxidations of vanadium spinel and augite over temperature range of 608-959 °C, which is described by the 3/2 order reaction. Increasing the heating rate to 5 °C min–1 or 10 °C min–1, only oxidation of vanadium spinel takes place in temperature range of 657-914 °C and 691-954 °C respectively, both described by the third order chemical reaction. As the slag particle decreases from 250 µm to 48 µm, the kinetic equation for describing the overlapping oxidation process changes from the Anti–Zhuravlev equation with internal diffusion controlling to reaction limiting equations.

ACS Style

Juhua Zhang; Wei Zhang; Zhengliang Xue. Oxidation Kinetics of Vanadium Slag Roasting in the Presence of Calcium Oxide. Mineral Processing and Extractive Metallurgy Review 2017, 38, 265 -273.

AMA Style

Juhua Zhang, Wei Zhang, Zhengliang Xue. Oxidation Kinetics of Vanadium Slag Roasting in the Presence of Calcium Oxide. Mineral Processing and Extractive Metallurgy Review. 2017; 38 (5):265-273.

Chicago/Turabian Style

Juhua Zhang; Wei Zhang; Zhengliang Xue. 2017. "Oxidation Kinetics of Vanadium Slag Roasting in the Presence of Calcium Oxide." Mineral Processing and Extractive Metallurgy Review 38, no. 5: 265-273.

Journal article
Published: 01 February 2017 in Energy
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ACS Style

Wei Zhang; Juhua Zhang; Zhengliang Xue. Exergy analyses of the oxygen blast furnace with top gas recycling process. Energy 2017, 121, 135 -146.

AMA Style

Wei Zhang, Juhua Zhang, Zhengliang Xue. Exergy analyses of the oxygen blast furnace with top gas recycling process. Energy. 2017; 121 ():135-146.

Chicago/Turabian Style

Wei Zhang; Juhua Zhang; Zhengliang Xue. 2017. "Exergy analyses of the oxygen blast furnace with top gas recycling process." Energy 121, no. : 135-146.

Journal article
Published: 06 May 2016 in Metals
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The oxidation kinetics of low valence titanium and iron in Ti-bearing blast furnace slag were investigated, the activation energies were calculated, which are 461.1 and 437.3 kJ/mol, respectively. The results illustrate that the oxidation process of Ti3+ in the slag is controlled by chemical reactions. However, the chemical reaction between oxygen and iron, between slag and gas, is the determining step of the iron oxidation process. The effects of the isothermal oxidation on the content of Fe2O3, FeM, FeO, and FeT in the slag are discussed. The Fe2+ and Ti3+ in the molten slag were oxidized at high temperatures. Oxygen affinity of the slag can be described using oxygen capacity. The oxygen capacity of Ti-bearing blast furnace slag was investigated during the dynamic oxidation process, the results indicates that the oxygen capacity of the slag decreased with increasing oxidation time during the dynamic oxidation process.

ACS Style

Li Zhang; Wu Zhang; Juhua Zhang; Guangqiang Li. Oxidation Kinetics and Oxygen Capacity of Ti-Bearing Blast Furnace Slag under Dynamic Oxidation Conditions. Metals 2016, 6, 105 .

AMA Style

Li Zhang, Wu Zhang, Juhua Zhang, Guangqiang Li. Oxidation Kinetics and Oxygen Capacity of Ti-Bearing Blast Furnace Slag under Dynamic Oxidation Conditions. Metals. 2016; 6 (5):105.

Chicago/Turabian Style

Li Zhang; Wu Zhang; Juhua Zhang; Guangqiang Li. 2016. "Oxidation Kinetics and Oxygen Capacity of Ti-Bearing Blast Furnace Slag under Dynamic Oxidation Conditions." Metals 6, no. 5: 105.

Journal article
Published: 01 January 2016 in ISIJ International
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ACS Style

Wei Zhang; Juhua Zhang; Zhengliang Xue; Zongshu Zou; Yuanhong Qi. Unsteady Analyses of the Top Gas Recycling Oxygen Blast Furnace. ISIJ International 2016, 56, 1358 -1367.

AMA Style

Wei Zhang, Juhua Zhang, Zhengliang Xue, Zongshu Zou, Yuanhong Qi. Unsteady Analyses of the Top Gas Recycling Oxygen Blast Furnace. ISIJ International. 2016; 56 (8):1358-1367.

Chicago/Turabian Style

Wei Zhang; Juhua Zhang; Zhengliang Xue; Zongshu Zou; Yuanhong Qi. 2016. "Unsteady Analyses of the Top Gas Recycling Oxygen Blast Furnace." ISIJ International 56, no. 8: 1358-1367.

Journal article
Published: 01 May 2015 in International Journal of Mineral Processing
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ACS Style

Juhua Zhang; Wei Zhang; Li Zhang; Songqing Gu. Mechanism of vanadium slag roasting with calcium oxide. International Journal of Mineral Processing 2015, 138, 20 -29.

AMA Style

Juhua Zhang, Wei Zhang, Li Zhang, Songqing Gu. Mechanism of vanadium slag roasting with calcium oxide. International Journal of Mineral Processing. 2015; 138 ():20-29.

Chicago/Turabian Style

Juhua Zhang; Wei Zhang; Li Zhang; Songqing Gu. 2015. "Mechanism of vanadium slag roasting with calcium oxide." International Journal of Mineral Processing 138, no. : 20-29.

Review
Published: 03 April 2014 in Solvent Extraction and Ion Exchange
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In the V2O5 production process, purification of vanadium-bearing solution plays an important role in determining the quality of the final product. The choice of purification method depends on the vanadium species, aqueous media, and associated impurities. In this review, the recent research results for the separation and recovery of vanadium from leaching solution with solvent extraction, ion exchange, and chemical precipitation separation are presented. The effects of the main operational parameters on the efficiency of purification with these three methods are compared and discussed respectively, and several problems existing in these processes are proposed.

ACS Style

Ju-Hua Zhang; Wei Zhang; Li Zhang; Song-Qing Gu. A Critical Review of Technology for Selective Recovery of Vanadium from Leaching Solution in V2O5Production. Solvent Extraction and Ion Exchange 2014, 32, 221 -248.

AMA Style

Ju-Hua Zhang, Wei Zhang, Li Zhang, Song-Qing Gu. A Critical Review of Technology for Selective Recovery of Vanadium from Leaching Solution in V2O5Production. Solvent Extraction and Ion Exchange. 2014; 32 (3):221-248.

Chicago/Turabian Style

Ju-Hua Zhang; Wei Zhang; Li Zhang; Song-Qing Gu. 2014. "A Critical Review of Technology for Selective Recovery of Vanadium from Leaching Solution in V2O5Production." Solvent Extraction and Ion Exchange 32, no. 3: 221-248.

Book chapter
Published: 06 September 2013 in PRICM
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This chapter contains sections titled: Introduction Overview of Thermodynamic Analyses in Literatures Fitting of the Newly Calculated Thermodynamic Data Discussion Conclusions and Perspectives Acknowledgement

ACS Style

Wei Zhang; Juhua Zhang; Qiang Li; Yibo He; Biao Tang; Mingming Li; Zuoliang Zhang; Zongshu Zou. Thermodynamic Analyses of Iron Oxides Redox Reactions. PRICM 2013, 777 -789.

AMA Style

Wei Zhang, Juhua Zhang, Qiang Li, Yibo He, Biao Tang, Mingming Li, Zuoliang Zhang, Zongshu Zou. Thermodynamic Analyses of Iron Oxides Redox Reactions. PRICM. 2013; ():777-789.

Chicago/Turabian Style

Wei Zhang; Juhua Zhang; Qiang Li; Yibo He; Biao Tang; Mingming Li; Zuoliang Zhang; Zongshu Zou. 2013. "Thermodynamic Analyses of Iron Oxides Redox Reactions." PRICM , no. : 777-789.

Journal article
Published: 05 October 2012 in International Journal of Engineering and Manufacturing
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ACS Style

Wei Zhang; Chang Linghu; Juhua Zhang. DbDMAD: a Database of DNA Methylation in Human Age-related Disease. International Journal of Engineering and Manufacturing 2012, 2, 8 -13.

AMA Style

Wei Zhang, Chang Linghu, Juhua Zhang. DbDMAD: a Database of DNA Methylation in Human Age-related Disease. International Journal of Engineering and Manufacturing. 2012; 2 (5):8-13.

Chicago/Turabian Style

Wei Zhang; Chang Linghu; Juhua Zhang. 2012. "DbDMAD: a Database of DNA Methylation in Human Age-related Disease." International Journal of Engineering and Manufacturing 2, no. 5: 8-13.