Article
Mining & Mineral Processing
Liuyi Ren, Zheyi Zhang, Weineng Zeng, Peipei Wang
Summary: This paper investigates the occurrence of vanadium in stone coal and proposes a potential technology for vanadium preconcentration. The mineralogical characterization of vanadium-bearing stone coal from Tongshan, Hubei, PR China was conducted using various analytical methods. The study finds that vanadium primarily exists as roscoelite in the stone coal, intergrown with other minerals. The results suggest that a roasting-gravity separation-classification process may be promising for pre-concentrating vanadium from stone coal.
JOURNAL OF MINING SCIENCE
(2022)
Article
Green & Sustainable Science & Technology
Jie Zhang, Kunpeng Liu, Baijun Yan
Summary: A new synergetic and cleaner method was proposed and verified to alleviate the difficulties of extracting vanadium from high-carbon stone coal and solve the associated pollution problems. The experimental results showed that the method effectively increased the gasification ratio and rate of carbon, and a high-grade vanadium concentrate was obtained through magnetic separation.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Metallurgy & Metallurgical Engineering
Shuai Yuan, Yong-hong Qin, Yong-peng Jin, Yan-jun LI
Summary: An innovative suspension roasting-leaching technology in the atmosphere has been proposed to improve vanadium extraction from refractory stone coal. The technology achieved a vanadium leaching rate of 47.14% at a roasting temperature of 800 degrees C, a roasting time of 20 min, and a gas flow rate of 400 mL/min, compared to a previous rate of 20%. The surface of the stone coal became rough and irregular during the suspension roasting process, increasing the specific surface area of the particles and destroying the lamellar structure of silicate minerals, resulting in the release of vanadium. Additionally, the vanadium in the stone coal was oxidized to V(V) or V(IV). The results indicate that the improved leaching rate is attributed to the release and transformation of vanadium during suspension roasting.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2023)
Article
Engineering, Chemical
Shuai Yuan, Mengyu He, Ruofeng Wang, Yongpeng Jin, Yanjun Li
Summary: An innovative multistage suspension roasting technology is proposed for vanadium leaching from stone coal. The results show that carbon removal of 53.13% is achieved in the first-stage roasting, accompanied by disruption of the vanadium-bearing mica lattice and production of dehydrogenated mica through the release of hydroxyl groups and vanadium. In the second-stage roasting, carbon is almost completely removed, and the mica structure is further destroyed and partially converted to feldspar. Under optimal conditions, the vanadium leaching rate increases from 20% using conventional technology to 51.42% using the presented technology.
Article
Mining & Mineral Processing
Hui Li, Yuexin Han, Jianping Jin, Peng Gao, Zhenya Zhou
Summary: The purpose of this study is to use process mineralogy as a practical tool to investigate the causes of low leaching rates in the curing-leaching process of vanadium-bearing stone coal and propose solutions or improvements to optimize the leaching index. By analyzing the effects of particle size, mineral composition, and sulfuric acid curing on different stages of the curing-leaching process, it was found that thorough washing after sieving and optimizing the curing process are necessary for improving the leaching rate. The analysis and detection of key products are helpful for identifying problems and enhancing the curing-leaching circuit process.
INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Yingbo Dong, Shijia Chong, Hai Lin
Summary: The recovery of vanadium from stone coal using bioleaching is a promising method. This study investigated the adsorption characteristics of Bacillus mucilaginosus on vanadium-bearing stone coal through bioleaching and biosorption experiments. The results showed that the pH value, bacterial concentration, and bacterial growth phase affected the biosorption of B. mucilaginosus on stone coal. The adsorption behavior was well described by the Freundlich model and the pseudo-second-order kinetic model.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(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
Engineering, Environmental
Lucie Bartonova, Helena Raclavska, Jan Najser
Summary: This paper evaluates the important aspects of V in coal and its behavior during combustion, with a focus on its extraction from ash and slag waste. It also evaluates the co-combustion of coal and waste fuels and their corresponding ash and slag counterparts. The paper summarizes V levels in coal and other materials, discusses V speciation in ash and slag residues, and compares theoretical predictions with experimental results. It also discusses oxy-fuel combustion conditions and separation methods for extracting V from ash and slag residues. The paper concludes with remarks on promising trends and limitations for future research.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Metallurgy & Metallurgical Engineering
Shuai Yuan, Yong-hong Qin, Yong-peng Jin, Yan-jun Li
Summary: The thermodynamics, kinetics, phase transformation, and microstructure evolution of vanadium-bearing stone coal during suspension roasting were systematically investigated. The carbon in the stone coal burned and produced CO2 during roasting. The mass loss of stone coal mainly occurred within the temperature range from 600 to 840 degrees C. The thermal decomposition reaction of stone coal was described by the Ginstling-Brounshtein equation, with an apparent activation energy of 136.09 kJ/mol and pre-exponential factors of 12.40 s(-1). The structure of the stone coal changed and severe sintering occurred at higher temperatures.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2022)
Article
Environmental Sciences
Yingbo Dong, Shijia Chong, Hai Lin
Summary: Biochar has been found to significantly increase the leaching rate of vanadium and copper by Thiobacillus ferrooxidans in stone coal tailings. Its main promoting effects include providing a habitat for microorganisms, storing nutrients, and facilitating electron transfer.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Review
Engineering, Chemical
Allan Gomez-Flores, Sadia Ilyas, Graeme W. Heyes, Hyunjung Kim
Summary: This article reviews the application of artificial intelligence in various unit operations for mineral concentration. Using AI for yield prediction can add value to control, as the yields are not necessarily linearly correlated with input variables. The current research neglects fundamental variables as inputs, and instrumentation and industrial simplicity have hindered their consideration.
MINERALS ENGINEERING
(2022)
Article
Energy & Fuels
Huiyong Niu, Yanxiao Yang, Shuopeng Li
Summary: This paper investigates the influence of pre-oxidization temperature and pre-oxidization oxygen concentration on the secondary oxidation of coal. The results suggest that both temperature and oxygen concentration have effects on the burning process of oxidized coal, particularly in the first three stages. Importantly, different pre-oxidized coals have different risks in different stages of the secondary oxidation process.
Article
Engineering, Chemical
Yingbo Dong, Jinyu Zan, Hai Lin
Summary: To improve the efficiency of vanadium bioleaching from stone coal, this study explored different enhanced bioleaching methods. Results showed that adding 1 g of biochar had the best effect on vanadium leaching, with a 9.8% higher leaching rate compared to the control group. A compound enhanced treatment method including plasma treatment and the addition of 0.1 g/L biochar further improved vanadium leaching, with a 21.7% higher leaching rate compared to the control group. The use of biochar facilitated bacterial attachment and the plasma pretreatment modified the surface of stone coal to enhance the reaction between bacteria and vanadium ore.
MINERALS ENGINEERING
(2023)
Review
Multidisciplinary Sciences
Theerayut Phengsaart, Palot Srichonphaisan, Chinawich Kertbundit, Natatsawas Soonthornwiphat, Somthida Sinthugoot, Nutthakarn Phumkokrux, Onchanok Juntarasakul, Kreangkrai Maneeintr, Apisit Numprasanthai, Ilhwan Park, Carlito Baltazar Tabelin, Naoki Hiroyoshi, Mayumi Ito
Summary: Affordable and clean energy is crucial for sustainable development, and coal is widely used due to its abundance and simplicity for low-income and developing countries. However, coal contains impurities and pollutants, making coal cleaning technology essential to reduce environmental impacts.
Article
Engineering, Environmental
Rakesh Saini, Santosh Deb Barma, Danda Srinivas Rao, Suddhasatwa Basu, Sanjay M. Mahajani
Summary: This study performs applied mineralogical characterization of coal gasification ash (CGA) from a commercial fixed bed downdraft gasification plant in eastern India. The results show that SiO2 and Al2O3 are the major components of CGA, accounting for about 85% of the total composition. The dominant mineral phases, such as quartz and mullite, have potential applications in construction and refractory material manufacturing. Moreover, the presence of rare and valuable earth elements (RVEEs) in CGA suggests a new opportunity for meeting the demand in RVEEs-starved countries like India.
Article
Materials Science, Multidisciplinary
Shenxu Bao, Yongpeng Luo, Yimin Zhang
Summary: The aim of this investigation was to prepare a geopolymeric precursor from vanadium tailing through thermal activation and modification. The research found that during thermal activation, the vanadium tailing was corroded by sodium hydroxide, forming a sodium silicate coating. When water was added, the sodium silicate coating dissolved and released silicon species, creating an alkaline solution environment. Metakaolin dissolved in the alkaline environment to generate aluminum species, which then underwent geopolymerization to produce a geopolymer with excellent mechanical performance. This investigation improves the feasibility of using geopolymer technology for large-scale and in-situ applications, and promotes the utilization of vanadium tailing and other silica-rich solid wastes.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2022)
Article
Electrochemistry
Xueli Wan, Shenxu Bao, Yimin Zhang
Summary: The carbonization process of 2-methylimidazole zinc salt to obtain ZDPC porous carbon was explored. The ZDPC/AC composite electrode showed a high electrosorption capacity for V(V). The results indicate the huge potential application of ZDPC in the field of capacitive adsorption for metals.
JOURNAL OF APPLIED ELECTROCHEMISTRY
(2022)
Article
Green & Sustainable Science & Technology
Bo Chen, Shenxu Bao, Yimin Zhang, Liuyi Ren
Summary: In this study, a novel and environmentally friendly technique of using ultrasound to enhance the ammonium salt precipitation process of vanadium was proposed. The results showed that the ultrasound precipitation method can achieve similar vanadium precipitation rate and purity compared to the regular precipitation method, while significantly reducing the reaction time and ammonium salt consumption. The products obtained by ultrasound precipitation method also exhibited more uniform particle size distribution and regular crystal shape.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Engineering, Chemical
Wei Ding, Shenxu Bao, Yimin Zhang, Junhui Xiao
Summary: This study systematically investigated the effect and mechanism of ultrasound on the leaching of gallium and zinc from corundum flue dust (CFD). The results showed that ultrasound could significantly increase the leaching efficiencies of gallium and zinc. The enhancement of ultrasound was attributed to the breaking of particle agglomerates, improving sulfuric acid diffusion, and accelerating the reaction between sulfuric acid and amorphous silicate.
MINERALS ENGINEERING
(2022)
Article
Materials Science, Ceramics
Linhui Luo, Peng Du, Yun Lei, Yongqin Wang, Beibei Du, Can Li, Yuncui Wu, Shenxu Bao, Wenmao Tu, Bingsuo Zou
Summary: In this study, GQDs/W18O49/WO3 (WCW) were loaded on g-C3N4 with defects (CN1-x) using hydrothermal synthesis. The CN1-x@WCW composites exhibited improved photoelectric efficiency, interfacial electron transfer, and electron lifetime compared to WCW.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Chi Ma, Shenxu Bao, Yimin Zhang, Yongpeng Luo, Yaqiong Gui, Yanzeng Ren
Summary: The recycling of sewage sludge and fly ash is important for solid waste disposal. In this study, non-sintered ceramsite was prepared using alkaline activators and room temperature curing. The composite activation by sodium hydroxide and calcium oxide showed better results than individual activation. The formed sodium silicate hydrate and hydrated calcium silicate gels helped in forming a denser structure. The ceramsite met the standard requirements with high compressive strength.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Environmental
Ilidio Deocleciano Salomao Dos Santos, Shen Xu Bao, Baba Imoro Musah
Summary: In this study, a low-cost metakaolin-based geopolymer (MKG) was synthesized and applied to remove mercury from model wastewater. The results showed that MKG had good adsorption capacity and stability, and it was effective in removing mercury.
WATER ENVIRONMENT RESEARCH
(2022)
Article
Engineering, Chemical
Guohao Chen, Liuyi Ren, Yimin Zhang, Shenxu Bao
Summary: This study aims to improve the recovery of fine muscovite by introducing nanobubbles (NBs), which can increase the flotation recovery by about 7% and reduce reagent dosage by 25% in the dodecylamine flotation system. NBs pretreatment reduces adsorption capacity and electrostatic repulsion, promotes particle agglomeration, accelerates the formation of three-phase contact line, and enhances the flotation efficiency of fine muscovite.
MINERALS ENGINEERING
(2022)
Article
Geochemistry & Geophysics
Zheyi Zhang, Liuyi Ren, Yimin Zhang, Shenxu Bao
Summary: This paper studied the application of benzohydroxamic acid and sodium silicofluoride in the flotation of rutile and garnet. The results showed that benzohydroxamic acid had good collecting performance for both rutile and garnet, while sodium silicofluoride inhibited garnet. These reagents had certain effects on the chemical environment of rutile and garnet.
Article
Construction & Building Technology
Muyang Huang, Shenxu Bao, Yimin Zhang, Yongpeng Luo, Xianqing Xu, Ilidio Deocleciano Salomao Dos Santos
Summary: In this study, cementitious materials (CM) were prepared using burnt coal cinder (BCC) as the raw material, and the compressive strength of BCC-based CM reached 45.53 MPa. The absorption of P was inhibited by adding sufficient exogenous Si. Microstructure analysis revealed a more homogeneous distribution of gel phases in the ternary system of Ca-Si-P, resulting in a more compact and stronger microstructure.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Review
Energy & Fuels
Shenxu Bao, Chunfu Xin, Yimin Zhang, Bo Chen, Wei Ding, Yongpeng Luo
Summary: Water resources are essential for human survival and development, but water pollution and scarcity pose major challenges. Capacitive deionization (CDI) has emerged as a promising water treatment technology, offering advantages such as low energy consumption, high efficiency, low cost, and environmental friendliness. This paper provides a comprehensive overview of CDI's applications in water treatment, including heavy metal and organic contaminant removal, water softening, phosphate and nitrate removal, and water disinfection. It also discusses the latest research progress on energy recovery and consumption assessment in the CDI process, as well as the challenges and future opportunities for CDI technology.
Article
Materials Science, Multidisciplinary
Jiong Chen, Yuncui Wu, Yun Lei, Peng Du, Can Li, Beibei Du, Yongqin Wang, Linhui Luo, Shenxu Bao, Bingsuo Zou
Summary: ZnxCd1-xSe and ZnxCd1-xSe/GQDs nanocomposites were synthesized using a hydrothermal method. The performance of ZnxCd1-xSe could be adjusted by changing the Zn/Cd ratio and introducing GQDs. The introduction of GQDs significantly improved the photoelectric performance of the semiconductor.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2022)
Article
Chemistry, Applied
Qianqian Wang, Haofeng Zhang, Yanling Xu, Shenxu Bao, Cheng Liu, Siyuan Yang
Summary: Native starches and their phosphates were used as depressants for the flotation of quartz from hematite. Starch phosphates exhibited stronger depressing abilities than native starches. The proposed adsorption model insights will significantly promote the development of starch-based depressants for iron ore flotation and other mineral processing applications.
CARBOHYDRATE POLYMERS
(2023)
Article
Geochemistry & Geophysics
Chenyu Fan, Liuyi Ren, Yimin Zhang, Shenxu Bao, Zhilu Yang
Summary: In this study, different doses of sodium hexametaphosphate (SHMP) were added as grinding aids in the process of muscovite grinding, and the effect of SHMP on the grinding efficiency of muscovite was investigated. The results demonstrated that the grinding efficiency increased significantly with the increase in SHMP dosage. Various test methods were used to analyze the mechanism of SHMP in improving the grinding efficiency of muscovite. It was found that SHMP physically adsorbed on the muscovite powder, resulting in the destruction of the ordered structure of muscovite crystals, surface roughening, and the appearance of cracks. This improved the pulp environment and dispersion of muscovite powder, leading to enhanced grinding efficiency.
Article
Geochemistry & Geophysics
Liuyi Ren, Ziwei Jiao, Yimin Zhang, Shenxu Bao
Summary: In this study, the crystal cells of muscovite were optimized using Materials Studio 7.0 software. Some properties of the (002) crystal plane and (131) crystal plane were calculated to analyze their influence on flotation behavior. XRD and flotation analysis revealed that the (002) crystal plane had higher surface energy and was more easily exposed compared to the (131) crystal plane. Simulation results suggested that exposing more (131) crystal planes during the grinding stage can improve flotation efficiency.
