Article
Materials Science, Ceramics
Xinyu Zhu, Na Sun, Yang Huang, Yangge Zhu, Weiqing Wang
Summary: Foam ceramics were prepared using vanadium-titanium magnetite tailings, feldspar tailings, and kaolinite-type pyrite tailings as raw materials, with the addition of SiC as foaming agents. The study investigated the effects of raw materials content and sintering temperature on the composition, structure, and properties of the foam ceramics, highlighting the auxiliary foaming effect of VTMT. The sample with 60% VTMT content exhibited high porosity, low bulk density, and moderate compressive strength, demonstrating the potential for cost-effective foam ceramics production.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Green & Sustainable Science & Technology
Lin Li, Tao Jiang, Bojian Chen, Jing Wen, Guangdong Yang
Summary: This study systematically investigated the effects of SiO2 and CaO content on the properties of foamed ceramics based on vanadium-titanium magnetite tailings. The results showed that increasing CaO content increased the bulk density of the samples, while excessive SiO2 content negatively affected pore quantity and interconnectivity.
JOURNAL OF SUSTAINABLE METALLURGY
(2022)
Article
Engineering, Chemical
Yosep Han, Seongmin Kim, Byunghun Go, Sujeong Lee, Seongkyun Park, Ho-Seok Jeon
Summary: An optimized magnetic separation process was proposed to improve the recovery of high-content vanadium and titanium concentrates from vanadium-titanium magnetite ore. By crushing and grinding the ore samples, an optimum grinding time and magnetic intensity were determined, leading to satisfactory grade and recovery of vanadium and titanium concentrates.
Article
Engineering, Environmental
Chun-dan Gan, Qi-xuan Tang, Hao Wang, Jin-yan Yang, Aleksander Nikitin
Summary: The microbially-and chemically-mediated redox process plays a crucial role in controlling the fate of vanadium in tailing environment. This study focused on the coupled biotic reduction of vanadium mediated by Shewanella oneidensis MR-1 and oxalic acid. The results showed that oxalic acid promoted the microbial release and redistribution of vanadium in solid-phase, suggesting the significance of organic agents in the vanadium biogeochemical cycle in natural systems.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Environmental Sciences
Zhijie Long, Haijian Bing, He Zhu, Yanhong Wu
Summary: Soil covering is an effective measure to reduce pollutant release and promote vegetation restoration in tailings reservoirs. A soil column leaching experiment showed limited migration and leaching of vanadium (V) in the system of vanadium titano-magnetite tailings (VTMTs) covered by soils with different depths. The results provide significant guidance for vegetation restoration in V-rich tailings reservoirs.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Engineering, Chemical
Wenbo Li, Xiao Liu, Dongquan Liu, Yuexin Han
Summary: In this paper, magnetization roasting low-intensity magnetic separation was conducted to separate titanium and vanadium from an Australian hematite concentrate. The results showed that high-grade iron concentrate and iron tailings with desirable recovery rates could be obtained under optimal roasting conditions. XRD analysis and magnetic analysis confirmed the transformation of minerals during magnetization roasting, enabling the easy separation of ilmenite and vanadium through magnetic separation.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Green & Sustainable Science & Technology
Yuansheng Peng, Xiaoduo Ou, Xiangsheng Chen, Xingtao Lin, Xiang Shen
Summary: In this study, discarded bauxite tailings (BTs) were transformed into eco-friendly foamed mixture lightweight soil (FMLS) without high temperature calcination. The properties of FMLS with BTs (FMLSB) were investigated at different replacement percentages. The results showed that the replacement of BTs reduced the wet density and compressive strength of the material, but water stability remained good.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Crystallography
Weibin Chen, Zhaoqi Dong, Yang Jiao, Lili Liu, Xidong Wang
Summary: The use of bentonite as a binder for VTM pellets can improve their compressive and dropping strength, while roasting the pellets is essential for enhancing their metallurgical properties. The optimal roasting conditions are a calcination temperature of 1523 K and a calcination time of 20 minutes.
Review
Materials Science, Multidisciplinary
Yufeng Guo, Kuo Liu, Feng Chen, Shuai Wang, Lingzhi Yang, Dongyue Li, Yu Zheng
Summary: High-pressure grinding roll (HPGR) technology can be used to pretreat vanadium-titanium magnetite (VTM) concentrate, which helps solve the low consolidation strength and high energy consumption problems. Compared with other technologies, HPGR pretreatment offers high efficiency and low energy consumption. This study discovered that VTM concentrate mainly consists of titaniferous magnetite particles with coarse size and regular shape. The lower surface area leads to lower microcrystalline and recrystallization bonding strength of titaniferous hematite in VTM pellets. HPGR pretreatment technology increases the total contact area between particles, promoting the formation of more microcrystalline and recrystallization connections of titaniferous hematite, significantly improving the performance of VTM pellets.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Green & Sustainable Science & Technology
Chengxu Liao, Lin Liu, Zuolong Shi, Xinfeng Zhang, Li Zou, Zhihui Chen, Yawen Liu, Yonghua Sun
Summary: In this study, a composite material was prepared using vanadium titanomagnetite (VTM) tailings, kaolin, and sodium silicate, and used as a photocatalyst for the degradation of organic dyes. The photocatalytic material exhibited excellent performance in degrading rhodamine B within a short period of time. The synthesized materials were characterized using various techniques, and the effects of solution pH and preparation conditions on the photocatalytic efficiency were investigated. The results indicated the feasibility of utilizing VTM tailings as photocatalysts and provided insights for their comprehensive utilization.
JOURNAL OF SUSTAINABLE METALLURGY
(2023)
Article
Materials Science, Multidisciplinary
Gongjin Cheng, Lanjie Li, Xiangxin Xue, He Yang, Weijun Zhang, Ruiguo Bai
Summary: The effects of extracted-vanadium residue (EVR) and MgO on the fundamental sintering characteristics of High-chromium vanadium-titanium magnetite (HCVTM) were studied. The optimal blending ratio was found to be 6 wt% EVR and 1 wt% MgO.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Bo Wang, Xueyong Ding, Tianhua Ju, Xiaofei Zhang, Gongjin Cheng
Summary: The novel smelting reduction process shows promise in reducing environmental pollution in the ironmaking industry. Parameters such as reduction temperature, holding time, and coal ratio significantly affect the metallization rate. Achieving a metallization rate of over 70% is possible under certain conditions, but increasing the parameters further may lead to reoxidation.
Article
Chemistry, Physical
Shuangping Yang, Shouman Liu, Shijie Guo, Tiantian Zhang, Jianghan Li
Summary: In this study, the enrichment conditions of titanium element during the melting process of vanadium-titanium magnetite were optimized using experimental methods. The study clarified the form and migration law of titanium element in the slag under different melting conditions.
Article
Materials Science, Multidisciplinary
Hailu Wang, Yuanbing Li, Bo Yin, Shujing Li, Ruofei Xiang, Han Luo, Shiqi Li, Zimeng Zhou
Summary: In this study, cordierite foam ceramics were prepared using kyanite tailings and other materials, and the effects of different process parameters on their properties were investigated. Additionally, the dynamic heat transfer of cordierite foam ceramics in different seasons was simulated using software, providing a reference for similar applications.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Construction & Building Technology
Fanghui Fu, Nanyan Hu, Yicheng Ye, Guan Chen, Jinpeng Jia
Summary: By adjusting the sintering time and heating rate, phosphorus tailings and coal gangue were used to prepare lightweight foam ceramics with optimized performance. The effects of sintering time and heating rate on the phase evolution, pore structure, physical properties, and heavy metal solidification were investigated. The results showed that the best processing conditions were sintering at 1150°C for 60 minutes with a heating rate of 5°C/min, resulting in lightweight foam ceramics with uniform pore structure, high porosity, low density, satisfactory compressive strength, and low water absorption. This technology not only provides guidance for manufacturing high-performance lightweight foam ceramics, but also achieves the high value-added utilization of phosphorus tailings and coal gangue.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Environmental
Xingxing Hu, Lingjie Liu, Yanmeng Bi, Lu Li, Chunsheng Qiu, Jingjie Yu, Shaopo Wang
Summary: In this study, the impact of exogenous folate on the start-up process of single-stage partial nitritation-anammox (SPNA) was evaluated using two lab-scale reactors. The results showed that folate addition can enhance nitrogen removal rate, extracellular polymeric substances production, hydrazine oxidase and dehydrogenase activity, as well as the relative abundance of Candidatus Brocadia.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2024)
Article
Engineering, Environmental
Shaocang He, Tingting Shen, Jing Sun, Haoqi Pan, Chenxu Sun, Tianpeng Li, Runyao Li, Enshan Zhang
Summary: A novel process of acid leaching neutralization was developed for the preparation of inorganic polymeric composite ferric aluminum silicate coagulant (CFAS) using solid waste coal gasification coarse slag (CGCS). The optimized preparation process was determined through single-factor experiment and the performance of CFAS was evaluated for domestic sewage treatment. The results showed that CFAS exhibited excellent coagulation ability and achieved significant removal efficiency for turbidity, ammonia nitrogen, and chemical oxygen demand.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2024)
Article
Engineering, Environmental
Kinga Szatmari, Sandor Nemeth, Alex Kummer
Summary: In this article, a resilience-based reinforcement learning approach is proposed to address the potential thermal runaway issue in batch reactors. By calculating the resilience metric for reactors and utilizing Deep Q-learning to decide when to intervene in the system, resilient-based mitigation systems can be effectively developed.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2024)
Article
Engineering, Environmental
Bingyou Jiang, Qi Yao, Mingqing Su, Jingjing Li, Kunlun Lu, Dawei Ding, Han Hong
Summary: This study investigates the inhibitory characteristics and mechanisms of ABC powder on coal powder explosion. The addition of ABC powder significantly decreases the maximum explosion pressure and can completely suppress coal dust explosions. The study also reveals the thermal decomposition characteristics and reaction kinetics of the mixed system.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2024)
Article
Engineering, Environmental
Kubilay Bayramoglu, Mustafa Nuran
Summary: This study examines the feasibility of using pyrolytic oil from waste tires as fuel in diesel engines, and evaluates its energy, exergy, and sustainability. The results indicate that pyrolytic oil has potential as a renewable fuel source with relatively high thermal efficiency.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2024)
Article
Engineering, Environmental
Xinru Duan, Yejia Lv, Jiaxing Hong, Jianzhong Wu, Jia Zhang, Yang Yue, Guangren Qian
Summary: This study successfully prepared a tube reactor with optimized catalyst formula, which showed good performance in removing dioxins and other pollutants in the experiments.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2024)
Article
Engineering, Environmental
Jiaoyang Du, Xueming Dang, Xiaorong Gan, Xin Cui, Huimin Zhao
Summary: In this study, a photocatalyst-enzyme hybrid system was constructed, which solved the issue of enzyme inactivation caused by high concentration of H2O2 through photocatalytic in-situ H2O2 production, and improved the stability and catalytic efficiency of the enzyme. The effectiveness of the system in treating phenolic EDCs was confirmed through experiments.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2024)
Article
Engineering, Environmental
Fu-Rong Xiu, Longsheng Zhan, Yingying Qi, Xinyue Lei, Jiali Wang, Haipeng Zhou, Wenting Shao
Summary: This study developed a synergetic and high-efficiency treatment of waste tantalum capacitors (WTCs) and polyvinyl chloride (PVC) using subcritical water process. The treatment significantly reduced the temperature and reaction time for metal tantalum recovery from WTCs, and improved the dechlorination efficiency of PVC. The optimized conditions resulted in 100% resin conversion efficiency of WTCs and 97.39% dechlorination efficiency of PVC. The interaction between decomposition products of WTCs and PVC produced a high level of benzoic acid.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2024)
Article
Engineering, Environmental
Bingda Li, Jiaming Song, Yuting Li, Chaoying Meng, Shuxian Wang, Linghao Zong, Honggang Ye, Yishuai Jing, Feng Teng, Peng Hu, Haibo Fan, Guangde Chen, Xin Zhao
Summary: CdPS3 nanosheets, especially those exfoliated by sodium cholate, have shown highly efficient photocatalytic degradation performance. The strong dark adsorption and dye-sensitized photocatalytic properties of CdPS3 nanosheets contribute to high degradation efficiencies of various pollutants.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2024)
Article
Engineering, Environmental
Dongxu Ouyang, Yimei Pang, Bo Liu, Zhirong Wang
Summary: This study investigates the thermal runaway features of lithium-ion cells under tunnel conditions, considering different states of charge and tunnel ceilings. The results show that the tunnel visibility is affected by the smoke generated during thermal runaway, and the shape of the tunnel ceiling influences the temperature rise differently.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2024)
