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This work creatively proposed novel, low-cost, anorthite porous ceramic (APC)-based eutectic NaCl-KCl salt composite phase-change materials (C-PCMs) by using industrial solid waste blast furnace slag (BFS) and fly ash (FA) as the main materials. The spontaneous infiltration method was applied in this study, and the prepared composites have a promising prospect in the field of high-temperature heat storage because of good thermal stability, high thermal conductivity, and low cost. It was found that stable anorthite ceramic phase, high porosity, and good mechanical properties could be obtained at the sintering temperature of 1150 °C. Good chemical compatibility between APC and NaCl-KCl even under high temperature was proved by X-ray diffraction (XRD) analysis. The melting temperature and enthalpy of the prepared NaCl-KCl/APC C-PCMs were measured as 655.6 °C and 79.6 J/g, respectively, by differential scanning calorimetry (DSC). The supercooling of the NaCl-KCl/APC C-PCMs was only 4.2 °C comparing to 9.6 °C for pure NaCl-KCl, which was beneficial to improve the stability and prolong the service life. The thermal conductivity of NaCl-KCl was significantly enhanced from 0.57 to 2.69 W/(m·K) at 700 °C after penetration into APC. The microstructure observed by a scanning electron microscope (SEM) showed that NaCl-KCl eutectics successfully filled the irregular holes of APC. The good wettability between NaCl-KCl and APC was conducive to the infiltration of NaCl-KCl, improving the stability of the composites and preventing leakage of the molten salt. The prepared NaCl-KCl/APC C-PCMs could retain 97% of latent heat, and no significant cracks or new phases formed even after 100 melting–freezing thermal cycle tests. In all, these findings demonstrate that the prepared NaCl-KCl/APC C-PCMs have considerable potential in concentrated solar power plant, industrial waste heat recovery, and other high-temperature thermal energy storage fields.
Jicheng Liu; Yuanbo Zhang; Zijian Su; Dingyao Huang; Ding Xu; Manman Lu; Shuo Liu; Tao Jiang. Novel Low-Cost Anorthite Porous Ceramic-Based Binary Chlorate High-Temperature Thermal Energy Storage Material: Preparation and Characterization. Energy & Fuels 2021, 35, 12425 -12435.
AMA StyleJicheng Liu, Yuanbo Zhang, Zijian Su, Dingyao Huang, Ding Xu, Manman Lu, Shuo Liu, Tao Jiang. Novel Low-Cost Anorthite Porous Ceramic-Based Binary Chlorate High-Temperature Thermal Energy Storage Material: Preparation and Characterization. Energy & Fuels. 2021; 35 (15):12425-12435.
Chicago/Turabian StyleJicheng Liu; Yuanbo Zhang; Zijian Su; Dingyao Huang; Ding Xu; Manman Lu; Shuo Liu; Tao Jiang. 2021. "Novel Low-Cost Anorthite Porous Ceramic-Based Binary Chlorate High-Temperature Thermal Energy Storage Material: Preparation and Characterization." Energy & Fuels 35, no. 15: 12425-12435.
Traditional utilization of ferruginous manganese ore has mainly concentrated on the separation of Mn and Fe. However, an alternative process of novel uphill reaction diffusion followed by magnetic separation was developed for the synchronous recovery of manganese and iron as the form of ferrite ceramics from the ferruginous manganese ore in this work. The phase reconstruction, interfacial uphill reaction diffusion, ferrite size quantification and separation behavior were characterized via various means of XRD, XPS, TEM, VSM, SEM-EDS, optical microscopy, microhardness and thermodynamic analyses. In the phase reconstruction course, manganese and iron oxides reacted to form ferrites, whereas the impurities were enriched in liquid silicate phases due to the uphill reaction diffusion. Meanwhile, the ferrite particles grew and the liquid silicates aggregated owing to the intensified reaction diffusion by CaO addition. During the water quenching process, microcracks at the cleavage plane between the silicate and ferrites are preferentially generated due to fast cooling shrinkage of liquid silicates. Huge differences in hardness, magnetism, fusibility and cooling shrinkage of ferrites and silicates provided excellent mineralogical conditions for the successful grinding and magnetic separation of ferrites. Eventually, a soft magnetic manganese ferrite precursor with recoveries of 89.2 wt% iron and 85.6 wt% manganese was obtained. The interfacial reaction mechanisms for the formation of ferrites and silicates were also discussed in this work.
Bingbing Liu; Li Zhang; Bei Zhang; Jia Wang; Yuanbo Zhang; Guihong Han; Yijun Cao. Characterizations on phase reconstruction, microstructure evolution and separation of magnetic ferrite ceramics from low-grade manganese ores by novel uphill reaction diffusion and magnetic separation. Materials Characterization 2021, 175, 111028 .
AMA StyleBingbing Liu, Li Zhang, Bei Zhang, Jia Wang, Yuanbo Zhang, Guihong Han, Yijun Cao. Characterizations on phase reconstruction, microstructure evolution and separation of magnetic ferrite ceramics from low-grade manganese ores by novel uphill reaction diffusion and magnetic separation. Materials Characterization. 2021; 175 ():111028.
Chicago/Turabian StyleBingbing Liu; Li Zhang; Bei Zhang; Jia Wang; Yuanbo Zhang; Guihong Han; Yijun Cao. 2021. "Characterizations on phase reconstruction, microstructure evolution and separation of magnetic ferrite ceramics from low-grade manganese ores by novel uphill reaction diffusion and magnetic separation." Materials Characterization 175, no. : 111028.
Chromium-bearing slags produced during the stainless-steel smelting (SSS) are important recyclable secondary resources. Recovery of chromium from these slags is not only beneficial to increase the slag’s economic potential but also favorable to solve the environmental problems induced by the chromium (VI) in the slags. This study aims to review the technologies for recovering chromium from the chromium-containing SSS slags. To begin with, chromium resources and consumption around the world were analyzed. Then, the physicochemical characteristics of the SSS slags were provided, followed by a deep discussion on varieties of the normal and lately developed methods for recovering chromium from the slags, including physical separation, smelting reduction, thermal plasma, alkaline roasting-water leaching, alkaline leaching, and bioleaching processes. Specific attention was paid to the technical challenge appearing in the recovery of chromium from the SSS slags and to the possible measures for enhancing the chromium recovery by promoting the processing efficiency.
Foquan Gu; Yuanbo Zhang; Zijian Su; Yikang Tu; Shuo Liu; Tao Jiang. Recovery of chromium from chromium-bearing slags produced in the stainless-steel smelting: A review. Journal of Cleaner Production 2021, 296, 126467 .
AMA StyleFoquan Gu, Yuanbo Zhang, Zijian Su, Yikang Tu, Shuo Liu, Tao Jiang. Recovery of chromium from chromium-bearing slags produced in the stainless-steel smelting: A review. Journal of Cleaner Production. 2021; 296 ():126467.
Chicago/Turabian StyleFoquan Gu; Yuanbo Zhang; Zijian Su; Yikang Tu; Shuo Liu; Tao Jiang. 2021. "Recovery of chromium from chromium-bearing slags produced in the stainless-steel smelting: A review." Journal of Cleaner Production 296, no. : 126467.
During the past ten years, the stainless-steel industry has undergone rapid development around the world. At the same time, a great quantity of stainless-steel slag (mainly ferronickel slag and ferrochromium slag) was co-generated. It is urgent to seek an efficient method for the comprehensive utilization of ferronickel slag and ferrochromium slag. In this study, the feasibility of preparing refractory materials by co-sintering of ferronickel slag and ferrochromium slag was evaluated based on thermodynamic analysis. The thermodynamic results showed that by co-sintering of ferronickel slag and ferrochromium slag in the presence of magnesia, the phase composition of the system is forsterite, spinel, and perclase, which is beneficial to prepare high refractoriness of the refractory materials. The experimental results verified those findings, a refractory material with refractoriness of 1780 °C, bulk density of 2.30 g/cm3, apparent porosity of 16.19%, and compressive strength of 89.18 MPa could be obtained.
Foquan Gu; Yuanbo Zhang; Zhiwei Peng; Huimin Tang; Zijian Su; Tao Jiang. Preparation of Refractory Materials by Co-sintering of Ferronickel Slag and Ferrochromium Slag: Thermodynamic Analysis. The Minerals, Metals & Materials Series 2021, 283 -291.
AMA StyleFoquan Gu, Yuanbo Zhang, Zhiwei Peng, Huimin Tang, Zijian Su, Tao Jiang. Preparation of Refractory Materials by Co-sintering of Ferronickel Slag and Ferrochromium Slag: Thermodynamic Analysis. The Minerals, Metals & Materials Series. 2021; ():283-291.
Chicago/Turabian StyleFoquan Gu; Yuanbo Zhang; Zhiwei Peng; Huimin Tang; Zijian Su; Tao Jiang. 2021. "Preparation of Refractory Materials by Co-sintering of Ferronickel Slag and Ferrochromium Slag: Thermodynamic Analysis." The Minerals, Metals & Materials Series , no. : 283-291.
Polyhedral MnFe2O4 with multilayer structure was successfully synthesized, and the possible originating mechanism of multilayer structure was firstly determined in current study. The phase formation, morphology evolution and interface reaction of the solid-state reaction of MnO2 and Fe2O3 mixture under air and reduction atmospheres were comparatively investigated, and the microwave absorption property of polyhedral MnFe2O4 with multilayer structure were discussed via the XRD, SEM, XPS, TEM, AFM and vector network analyzer measurements. Experiment results showed that multilayer MnFe2O4 can be synthesized both in the air at 1200–1300 °C and in 4 vol%CO at 1000–1100 °C. The reduction atmosphere was favorable to the formation of multilayer structure of MnFe2O4 due to the occurrence of multilayer MnO as the intermedium. In addition, morphology evolution demonstrated that the particle size of MnO2 after reduction was decreased remarkably which was also beneficial to the formation of MnFe2O4. However, air atmosphere is unfavorable to the generation of MnFe2O4 due to the recrystallization growth of Fe2O3 to lump impeding the element diffusion. Resultantly, the required temperature for the synthesis of MnFe2O4 in air was much higher than that in 4 vol% CO. One possible mechanism for the polyhedral MnFe2O4 with multilayer structure was based on the combination of the greater growth speed of (111) plane in the cubic MnFe2O4 crystal and terrace-ledge-kink (TLK) growth model. Moreover, multilayer MnFe2O4 prepared by the solid-state reaction presented good microwave absorbing property compared with that of the ferrites synthesized via the representative wet chemistry and combined methods.
Li Zhang; Yizhuang Wang; Bingbing Liu; Jia Wang; Guihong Han; Yuanbo Zhang. Characterization and property of magnetic ferrite ceramics with interesting multilayer structure prepared by solid-state reaction. Ceramics International 2020, 47, 10927 -10939.
AMA StyleLi Zhang, Yizhuang Wang, Bingbing Liu, Jia Wang, Guihong Han, Yuanbo Zhang. Characterization and property of magnetic ferrite ceramics with interesting multilayer structure prepared by solid-state reaction. Ceramics International. 2020; 47 (8):10927-10939.
Chicago/Turabian StyleLi Zhang; Yizhuang Wang; Bingbing Liu; Jia Wang; Guihong Han; Yuanbo Zhang. 2020. "Characterization and property of magnetic ferrite ceramics with interesting multilayer structure prepared by solid-state reaction." Ceramics International 47, no. 8: 10927-10939.
The Cr(VI) could be adsorbed and reduced by the humic acid (HA)-Fe(II) system structured on the V, Ti-magnetite (VTM) surface. The Cr(VI) removal process included adsorption and reduction stages. First, the Cr(VI) was adsorbed on the VTM-HA surface via the ionic bonds between the Ti atoms of VTM core and the O atoms of the HCrO4−. The adsorption of Cr(VI) is uniform, monolayer, and controlled by Cr(VI) diffusion. Subsequently, the adsorbed Cr(VI) was reduced by the HA-Fe(II) system on the VTM-HA surface. During the Cr(VI) reduction process, the HA and Fe(II) have a synergistic effect. The Cr(VI) was reduced to the Cr(III) by the HA and Fe(II). Meanwhile, the HA could also reduce Fe(III) to Fe(II), making Fe(II) continue to participate in the Cr(VI) reduction. The olefin, hydroxyl, and aldehyde groups of HA were the primary electron donors during the Cr(VI) reduction. The Fe(II) acted as an electron bridge, transferring the electron from HA to Cr(VI). The reduced Cr(III) was deposited on the VTM-HA surface via the complexation with the carboxyl and hydroxyl groups of HA. The results demonstrated that the Cr(VI) could be adsorbed, reduced and complexed by the HA-Fe(II) system on the VTM-HA surface synchronously.
Manman Lu; Yuanbo Zhang; Zijian Su; Yikang Tu; Jia Wang; Shuo Liu; Jicheng Liu; Tao Jiang. The comprehensive investigation on removal mechanism of Cr(VI) by humic acid-Fe(II) system structured on V, Ti-bearing magnetite surface. Advanced Powder Technology 2020, 32, 37 -51.
AMA StyleManman Lu, Yuanbo Zhang, Zijian Su, Yikang Tu, Jia Wang, Shuo Liu, Jicheng Liu, Tao Jiang. The comprehensive investigation on removal mechanism of Cr(VI) by humic acid-Fe(II) system structured on V, Ti-bearing magnetite surface. Advanced Powder Technology. 2020; 32 (1):37-51.
Chicago/Turabian StyleManman Lu; Yuanbo Zhang; Zijian Su; Yikang Tu; Jia Wang; Shuo Liu; Jicheng Liu; Tao Jiang. 2020. "The comprehensive investigation on removal mechanism of Cr(VI) by humic acid-Fe(II) system structured on V, Ti-bearing magnetite surface." Advanced Powder Technology 32, no. 1: 37-51.
Mill scale scrap, which contains vast amounts of valuable metals, is a solid waste produced in the iron and steel industry. Conventional mill scale scrap treatment methods for metal extraction are characterized by high energy consumption and low value addition. In this study, co-treatment of mill scale scrap and manganese ore via the oxidization roasting-magnetic separation process was investigated for the synchronous preparation of higher-value materials and recovery of valuable metals. Thermodynamic and magnetism analyses indicated that a higher temperature (>1100 °C) and a MnO2/Fe2O3 molar ratio of 0.75–1 are essential for the preparation of manganese ferrite. The experimental validation revealed that soft magnetic manganese ferrite powders with a purity of 97.5 wt% were obtained when the test was conducted at 1300 °C for 120 min, followed by a two-stage grinding and magnetic separation process; the corresponding yield and the Mn and Fe recoveries were 78.99 wt%, 86.14 wt%, and 84.60 wt%, respectively. During the oxidization process, [Fe2+]O was initially oxidized to the anti-form spinel-type structure of [Fe3+][Fe2+Fe3+]O4, and thereafter, it reacted with the decomposition product of [Mn3+][Mn2+Mn3+]O4 to form a hybrid spinel-type structure [Me2+xMe3+l-x][Me2+1-xMe3+1+x]O4 (Me refers to Mn and Fe) via the Mn2+/Fe2+/Mn3+/Fe3+ ions exchange at the tetrahedral and octahedral sites. Moreover, the as-purified ferrite can be used as an ingredient for the preparation of high-performance MnZn ferrite.
Bingbing Liu; Li Zhang; Yuanbo Zhang; Guihong Han; Bei Zhang. Innovative methodology for co-treatment of mill scale scrap and manganese ore via oxidization roasting-magnetic separation for preparation of ferrite materials. Ceramics International 2020, 47, 6139 -6153.
AMA StyleBingbing Liu, Li Zhang, Yuanbo Zhang, Guihong Han, Bei Zhang. Innovative methodology for co-treatment of mill scale scrap and manganese ore via oxidization roasting-magnetic separation for preparation of ferrite materials. Ceramics International. 2020; 47 (5):6139-6153.
Chicago/Turabian StyleBingbing Liu; Li Zhang; Yuanbo Zhang; Guihong Han; Bei Zhang. 2020. "Innovative methodology for co-treatment of mill scale scrap and manganese ore via oxidization roasting-magnetic separation for preparation of ferrite materials." Ceramics International 47, no. 5: 6139-6153.
In this study, high pure humic acid (HA) extracted from lignite was fractionated into four fractions according to their molecular weights by the ultrafiltration method. The structural characteristics of various HA fractions were investigated by UV-Vis, FTIR, and 3D fluorescence spectra and 13C/1H-NMR tests. The experiment results showed that the HA fractions with the molecular weight >50 KDa are major, containing 70.89%. The active hydrogen proportion declined from 43.96% to 21.27% with the increase of HA molecular weight, meaning the decrease of the large HA molecules’ acidic group content. On the other hand, 80.93% of the aromatic nucleus content and 12.5% of the alkyl carbon (aliphatic structure) were observed in the large HA molecules that are much higher than those in the small HA molecules. The NMR and spectra studies indicated that the small HA molecules have more acidic groups such as hydroxy, carboxyl. Meanwhile, the large HA molecules have more aromatic and aliphatic structures. The above research indicated that the HA fractions with low molecular weight could provide more active sites for the interaction between HA and iron minerals. Moreover, the carbon chain and aromatic nucleus in the high molecular weight HA fractions could keep the space structure of HA stable.
Manman Lu; Yuanbo Zhang; Zijian Su; Tao Jiang. The NMR and spectral study on the structure of molecular size-fractionated lignite humic acid. Resources, Environment and Sustainability 2020, 2, 100004 .
AMA StyleManman Lu, Yuanbo Zhang, Zijian Su, Tao Jiang. The NMR and spectral study on the structure of molecular size-fractionated lignite humic acid. Resources, Environment and Sustainability. 2020; 2 ():100004.
Chicago/Turabian StyleManman Lu; Yuanbo Zhang; Zijian Su; Tao Jiang. 2020. "The NMR and spectral study on the structure of molecular size-fractionated lignite humic acid." Resources, Environment and Sustainability 2, no. : 100004.
NdFeB permanent magnet scrap is regarded as an important secondary resource which contains rare earth elements (REEs) such as Nd, Pr and Dy. Recovering these valuable REEs from the NdFeB permanent magnet scrap not only increases economic potential, but it also helps to reduce problems relating to disposal and the environment. Hydrometallurgical routes are considered to be the primary choice for recovering the REEs because of higher REEs recovery and its application to all types of magnet compositions. In this paper, the authors firstly reviewed the chemical and physical properties of NdFeB permanent magnet scrap, and then carried out an in-depth discussion on a variety of hydrometallurgical processes for recovering REEs from the NdFeB permanent magnet scrap. The methods mainly included selective leaching or complete leaching processes followed by precipitation, solvent extraction or ionic liquids extraction processes. Particular attention is devoted to the specific technical challenge that emerges in the hydrometallurgical recovery of REEs from NdFeB permanent magnet scrap and to the corresponding potential measures for improving REEs recovery by promoting the processing efficiency. This summarized review will be useful for researchers who are developing processes for recovering REEs from NdFeB permanent magnet scrap.
Yuanbo Zhang; Foquan Gu; Zijian Su; Shuo Liu; Corby Anderson; Tao Jiang. Hydrometallurgical Recovery of Rare Earth Elements from NdFeB Permanent Magnet Scrap: A Review. Metals 2020, 10, 841 .
AMA StyleYuanbo Zhang, Foquan Gu, Zijian Su, Shuo Liu, Corby Anderson, Tao Jiang. Hydrometallurgical Recovery of Rare Earth Elements from NdFeB Permanent Magnet Scrap: A Review. Metals. 2020; 10 (6):841.
Chicago/Turabian StyleYuanbo Zhang; Foquan Gu; Zijian Su; Shuo Liu; Corby Anderson; Tao Jiang. 2020. "Hydrometallurgical Recovery of Rare Earth Elements from NdFeB Permanent Magnet Scrap: A Review." Metals 10, no. 6: 841.
Ferronickel slag is a hazardous industrial waste containing a relatively high amount of chromium, which poses a great potential threat to the environment. It is of great significance to recover chromium from the slag for both economic and environmental benefits. In this study, recovery of chromium from ferronickel slag via alkaline roasting followed by water leaching was investigated, with an emphasis on the effect of roasting atmosphere on the phase transformation of ferronickel slag during the alkaline roasting process.
Foquan Gu; Yuanbo Zhang; Zhiwei Peng; Huimin Tang; Manman Lu; Shuo Liu; Zijian Su; Mingjun Rao; Guanghui Li; Tao Jiang. Recovery of Chromium from Ferronickel Slag via Alkaline Roasting Followed by Water Leaching: Effect of Roasting Atmosphere. The Minerals, Metals & Materials Series 2020, 359 -368.
AMA StyleFoquan Gu, Yuanbo Zhang, Zhiwei Peng, Huimin Tang, Manman Lu, Shuo Liu, Zijian Su, Mingjun Rao, Guanghui Li, Tao Jiang. Recovery of Chromium from Ferronickel Slag via Alkaline Roasting Followed by Water Leaching: Effect of Roasting Atmosphere. The Minerals, Metals & Materials Series. 2020; ():359-368.
Chicago/Turabian StyleFoquan Gu; Yuanbo Zhang; Zhiwei Peng; Huimin Tang; Manman Lu; Shuo Liu; Zijian Su; Mingjun Rao; Guanghui Li; Tao Jiang. 2020. "Recovery of Chromium from Ferronickel Slag via Alkaline Roasting Followed by Water Leaching: Effect of Roasting Atmosphere." The Minerals, Metals & Materials Series , no. : 359-368.
Chromium was selectively recovered from ferronickel slag by roasting the slag with addition of Na2O2, followed by water leaching. The thermodynamic analysis revealed that in the presence of Na2O2 at appropriate temperatures, the Cr2O3 in the ferronickel slag can be converted to NaCrO2, instead of Na2CrO4, which prevents the formation of highly toxic Cr (VI). The experimental results confirmed that under optimum alkaline roasting and water leaching conditions at mass ratio of ferronickel slag to Na2O2 of 1, roasting temperature of 600 °C, roasting time of 1 h, leaching temperature of 50 °C, leaching time of 1 h, and liquid-to-solid ratio of 10 mL/g, 92.33% of Cr was leached with 64.28% of Na, and 11.16% of Si and only 0.06 wt % of Cr was left in the leaching residue. The high leaching percentage of Cr was a result of the transformation of Cr2O3 in the ferronickel slag to NaCrO2 with a loose structure during alkaline roasting that was beneficial to water dissolution. Compared to the traditional alkaline roasting process, the proposed more environmentally friendly method did not produce toxic Cr (VI) during recovery of chromium and the resulting residue has potential to be used as a good construction material.
Foquan Gu; Yuanbo Zhang; Zhiwei Peng; Zijian Su; Huimin Tang; Weiguang Tian; Guoshen Liang; JoonHo Lee; Mingjun Rao; Guanghui Li; Tao Jiang. Selective recovery of chromium from ferronickel slag via alkaline roasting followed by water leaching. Journal of Hazardous Materials 2019, 374, 83 -91.
AMA StyleFoquan Gu, Yuanbo Zhang, Zhiwei Peng, Zijian Su, Huimin Tang, Weiguang Tian, Guoshen Liang, JoonHo Lee, Mingjun Rao, Guanghui Li, Tao Jiang. Selective recovery of chromium from ferronickel slag via alkaline roasting followed by water leaching. Journal of Hazardous Materials. 2019; 374 ():83-91.
Chicago/Turabian StyleFoquan Gu; Yuanbo Zhang; Zhiwei Peng; Zijian Su; Huimin Tang; Weiguang Tian; Guoshen Liang; JoonHo Lee; Mingjun Rao; Guanghui Li; Tao Jiang. 2019. "Selective recovery of chromium from ferronickel slag via alkaline roasting followed by water leaching." Journal of Hazardous Materials 374, no. : 83-91.
Lead (Pb) ions are chronically detected in soil, underground and natural water, there is a need for low-cost in situ remediation techniques. A novel mineral based magnetic adsorbent, consisting of natural vanadium, titanium-bearing magnetite particles coated by humic acid (abbr. VTM-HA), was developed for removing Pb(II) from wastewater. In this study, adsorption-desorption characteristics and mechanisms of Pb (II) on the VTM-HA adsorbent were investigated. The regeneration and reuse feasibility of the VTM-HA adsorbent were also conducted. The adsorption tests further verified that Pb(II) was removed rapidly and efficiently by the VTM-HA adsorbent. Moreover, Pb (II) adsorbed on the VTM-HA adsorbent could be easily eluted using a small amount of acidic eluent, and the desorption of Pb (II) could reach 99.3 wt% in 0.1 M HNO3 (pH = 1). After five adsorption-desorption regeneration cycles, the magnetism and Pb(II) adsorption capacity of the regenerated VTM-HA adsorbent almost kept unchanged. The results indicated that the VTM-HA adsorbent had excellent adsorption capacity and regenerative ability, which could be used as ideal adsorbents for removing Pb (II) from acid wastewater in commercial application. The mechanisms of Pb (II) adsorption and desorption were explored by FTIR, XPS analysis and DFT calculation.
Manman Lu; Yuanbo Zhang; Youlian Zhou; Zijian Su; Bingbing Liu; Guanghui Li; Tao Jiang. Adsorption-desorption characteristics and mechanisms of Pb(II) on natural vanadium, titanium-bearing magnetite-humic acid magnetic adsorbent. Powder Technology 2018, 344, 947 -958.
AMA StyleManman Lu, Yuanbo Zhang, Youlian Zhou, Zijian Su, Bingbing Liu, Guanghui Li, Tao Jiang. Adsorption-desorption characteristics and mechanisms of Pb(II) on natural vanadium, titanium-bearing magnetite-humic acid magnetic adsorbent. Powder Technology. 2018; 344 ():947-958.
Chicago/Turabian StyleManman Lu; Yuanbo Zhang; Youlian Zhou; Zijian Su; Bingbing Liu; Guanghui Li; Tao Jiang. 2018. "Adsorption-desorption characteristics and mechanisms of Pb(II) on natural vanadium, titanium-bearing magnetite-humic acid magnetic adsorbent." Powder Technology 344, no. : 947-958.
There are abundant ferruginous manganese ores (abbr. Fe-Mn ores) in many parts of the world. For example, almost half of the manganese ore resources in India are ferruginous and more than 73% of the manganese ores in China belong to Fe-Mn ores with a low Mn/Fe mass ratio (<3). With the depletion of high grade manganese ore resources, the Fe-Mn ores are becoming important substitution resources for extracting manganese. In general, the production of Mn alloy from manganese ores requires that the Mn grade is more than 30% and the Mn/Fe mass ratio is greater than 5. During the production of electrolytic manganese or manganese chemical products, the issue of co-leaching of Mn and Fe complicates the purification procedure for the MnSO4 solution if Fe-Mn ores are used as raw materials. Numerous approaches are reported to realize the selective extraction and separation of Mn and Fe from the Fe-Mn ores. The extraction and separation technologies cover physical beneficiation, chemical beneficiation (hydrometallurgy and pyrometallurgy) and physico-chemical combined processes. This present work reviews the technical principles, parameters and recovery efficiencies of diverse processes on the aspect of selective extraction and separation of Mn and Fe from Fe-Mn ores. This review can provide guidance for selecting appropriate methods to exploit Fe-Mn ores or other secondary resources containing Fe and Mn oxides. The authors also put forward a new route to produce manganese ferrite materials using Fe-Mn ores as the raw materials.
Bingbing Liu; Yuanbo Zhang; Manman Lu; Zijian Su; Guanghui Li; Tao Jiang. Extraction and separation of manganese and iron from ferruginous manganese ores: A review. Minerals Engineering 2018, 131, 286 -303.
AMA StyleBingbing Liu, Yuanbo Zhang, Manman Lu, Zijian Su, Guanghui Li, Tao Jiang. Extraction and separation of manganese and iron from ferruginous manganese ores: A review. Minerals Engineering. 2018; 131 ():286-303.
Chicago/Turabian StyleBingbing Liu; Yuanbo Zhang; Manman Lu; Zijian Su; Guanghui Li; Tao Jiang. 2018. "Extraction and separation of manganese and iron from ferruginous manganese ores: A review." Minerals Engineering 131, no. : 286-303.
Investigations on the MnO2-Fe2O3 system roasted in air has been reported in our previous work. This study further investigated the MnO2-Fe2O3 system roasted under CO-CO2 atmosphere. Extensive investigations were concentrated on the reduction of simplex iron oxides or manganese oxides, and little attention were paid on the reduction of MnO2-Fe2O3 system regarding to interactive reactions between them. In this work, it was found that spinel-type MnxFe3−xO4 with high magnetism formed easily under CO-CO2 atmosphere. The reduction and thermodynamic analysis of pure MnFe2O4 were also researched to better understand the reduction behaviors of MnO2-Fe2O3 system. Phase study showed that a series of Mn-Fe composite oxides, including MnxFe3−xO4 and (MnO)y(FeO)1−y, generated during the reduction of MnO2-Fe2O3 system. MnxFe3−xO4 was readily generated under CO content of 2.5–25 vol% at 1000 °C. With further increase of CO content, MnxFe3−xO4 was reduced to (MnO)y(FeO)1−y and then to MnO and metallic iron. Reduction of manganese oxides, iron oxides and manganese ferrites happened concurrently during the reduction of MnO2-Fe2O3 system. The reduction of MnO2, Fe2O3, Fe3O4 and MnFe2O4 were compared by TG and thermodynamic analyses. In addition, the morphology evolution and magnetism change of the MnO2-Fe2O3 system reduced under different CO contents were also studied.
Bingbing Liu; Yuanbo Zhang; Jia Wang; Juan Wang; Zijian Su; Guanghui Li; Tao Jiang. A further investigation on the MnO2-Fe2O3 system roasted under CO-CO2 atmosphere. Advanced Powder Technology 2018, 30, 302 -310.
AMA StyleBingbing Liu, Yuanbo Zhang, Jia Wang, Juan Wang, Zijian Su, Guanghui Li, Tao Jiang. A further investigation on the MnO2-Fe2O3 system roasted under CO-CO2 atmosphere. Advanced Powder Technology. 2018; 30 (2):302-310.
Chicago/Turabian StyleBingbing Liu; Yuanbo Zhang; Jia Wang; Juan Wang; Zijian Su; Guanghui Li; Tao Jiang. 2018. "A further investigation on the MnO2-Fe2O3 system roasted under CO-CO2 atmosphere." Advanced Powder Technology 30, no. 2: 302-310.
The composite agglomeration process (CAP) aims at sintering a pelletized feed and a matrix feed together to produce a high-quality burden for a blast furnace. The pelletized feed is balled from fine iron concentrate or refractory iron-bearing resources, while the matrix feed is granulated from iron ore fines, fuels, fluxes and so on. Through mathematical calculation, heat accumulation regularity and heat-homogenizing of the sinter bed are acquired in CAP when pelletized feed is uniformly distributed. Then they are studied in the composite agglomeration process with optimized pelletized feed distribution, which is a novel and perfect sinter bed structure. Results show that large heat input gaps exist in the sinter bed under condition of even sinter mixture distribution, and it is very difficult to realize bed heat-homogenization by directly varying the solid fuel dosage among each layer. An optimized pelletized feed distribution realizes more heat in the upper layer together with heat-homogenization of the middle-lower layer when the proportions of pellets increase first in the middle-upper layer and then decrease in the middle-lower layer of the sinter bed. Under these circumstances, the sinter bed has much better available accumulation ratios with a maximum value of 78.29%, and possesses a greater total heat input of 6754.27 MJ when the coke breeze remains at the original dosage. To make full use of the available heat accumulation and adjust the pellet distribution, a good energy saving effect is obtained because the coke breeze mass declines by 13.91 kg/t-sinter. The current gross heat inputs of each unit are reduced remarkably, leading to a total heat input decrease of 25.95%. In pot tests of CAP, the differences of thermal parameters in whole bed are obviously reduced with the optimized pelletized feed distribution, which contributes to sinter homogeneity and energy savings.
Guanghui Li; Chen Liu; Zhengwei Yu; Mingjun Rao; Qiang Zhong; Yuanbo Zhang; Tao Jiang. Energy Saving of Composite Agglomeration Process (CAP) by Optimized Distribution of Pelletized Feed. Energies 2018, 11, 2382 .
AMA StyleGuanghui Li, Chen Liu, Zhengwei Yu, Mingjun Rao, Qiang Zhong, Yuanbo Zhang, Tao Jiang. Energy Saving of Composite Agglomeration Process (CAP) by Optimized Distribution of Pelletized Feed. Energies. 2018; 11 (9):2382.
Chicago/Turabian StyleGuanghui Li; Chen Liu; Zhengwei Yu; Mingjun Rao; Qiang Zhong; Yuanbo Zhang; Tao Jiang. 2018. "Energy Saving of Composite Agglomeration Process (CAP) by Optimized Distribution of Pelletized Feed." Energies 11, no. 9: 2382.
In the present study, porous alumina/silica materials were prepared by selective leaching of silicon/aluminum constituents from thermal-activated kaolinite in inorganic acid or alkali liquor. The correlations between the characteristics of the prepared porous materials and the dissolution properties of activated kaolinite were also investigated. The results show that the specific surface area (SSA) of porous alumina/silica increases with silica/alumina dissolution, but without marked change of the BJH pore size. Furthermore, change in pore volume is more dependent on activation temperature. The porous alumina and silica obtained from alkali leaching of kaolinite activated at 1150 °C for 15 min and acid leaching of kaolinite activated at 850 °C for 15 min are mesoporous, with SSAs, BJH pore sizes and pore volumes of 55.8 m2/g and 280.3 m2/g, 6.06 nm and 3.06 nm, 0.1455 mL/g and 0.1945 mL/g, respectively. According to the adsorption tests, porous alumina has superior adsorption capacities for Cu2+, Pb2+ and Cd2+ compared with porous silica and activated carbon. The maximum capacities of porous alumina for Cu2+, Pb2+ and Cd2+ are 134 mg/g, 183 mg/g and 195 mg/g, respectively, at 30 °C.
Jun Luo; Tao Jiang; Guanghui Li; Zhiwei Peng; Mingjun Rao; Yuanbo Zhang. Porous Materials from Thermally Activated Kaolinite: Preparation, Characterization and Application. Materials 2017, 10, 647 .
AMA StyleJun Luo, Tao Jiang, Guanghui Li, Zhiwei Peng, Mingjun Rao, Yuanbo Zhang. Porous Materials from Thermally Activated Kaolinite: Preparation, Characterization and Application. Materials. 2017; 10 (6):647.
Chicago/Turabian StyleJun Luo; Tao Jiang; Guanghui Li; Zhiwei Peng; Mingjun Rao; Yuanbo Zhang. 2017. "Porous Materials from Thermally Activated Kaolinite: Preparation, Characterization and Application." Materials 10, no. 6: 647.