Article
Green & Sustainable Science & Technology
Yue Cao, Yongsheng Sun, Peng Gao, Wenbo Li
Summary: This research proposes the use of straw-type biomass as a green and alternative reductant for the suspension magnetization roasting of iron ores. The results show that the biomass effectively reduces hematite ores to magnetite, leading to a significant increase in magnetization transformation. The study also investigates the microstructure evolution and thermal decomposition behavior of the iron ore, as well as the composition of organic gases produced during the process.
Article
Green & Sustainable Science & Technology
Xiaolong Zhang, Zhenya Zhou, Peng Gao, Yuexin Han
Summary: A novel method was proposed for enhancing iron extraction and dephosphorization from high-phosphorus limonite by suspension magnetization roasting-two stages of grinding and magnetic separation-flotation. The method achieved a flotation concentrate with an iron grade of 59.50% and a phosphorus of 0.317%. Compared with traditional methods, significant improvements were observed in iron grade and recovery.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Metallurgy & Metallurgical Engineering
Zhou Wen-tao, Sun Yong-sheng, Han Yue-xin, Gao Peng, Li Yan-jun
Summary: In this study, a microwave-assisted suspension magnetization roasting technology was proposed to recover and utilize oolitic hematite. The results showed that microwave pretreatment increased the iron grade and recovery of the magnetic concentrate. Microcracks formed during pretreatment promoted the selective transformation of weak magnetic hematite into strong magnetic magnetite.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2022)
Article
Metallurgy & Metallurgical Engineering
Zhang Qi, Sun Yong-sheng, Qin Yong-hong, Gao Peng, Yuan Shuai
Summary: This study investigates the in-situ kinetics and mechanism of siderite during suspension magnetization roasting (SMR) to improve its selective conversion to magnetite and CO, enriching the theoretical system of green SMR. The results show that siderite can be effectively converted to magnetite and CO within a certain temperature range, while the physical properties of the product are improved.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2022)
Article
Engineering, Environmental
Zhidong Tang, Qi Zhang, Yongsheng Sun, Peng Gao, Yuexin Han
Summary: The study demonstrates that the efficient extraction of iron from flotation tailings through suspension magnetization roasting and magnetic separation is a promising way to reduce emissions and efficiently treat mining tailings.
RESOURCES CONSERVATION AND RECYCLING
(2021)
Article
Engineering, Chemical
Xiao Liu, Wentao Zhou, Xiangai Guan
Summary: This study systematically calculated and analyzed the possible chemical reactions in the process of iron extraction from red mud by suspension magnetization roasting, and investigated the isothermal kinetic analysis of reduction reaction of the Na2OFe2O3-CO system. The results showed that Fe3O4 would be over-reduced to FeO or Fe easily if the CO concentration was high. The best kinetics model for the Na2O-Fe2O3-CO system was the D6 model, and the addition of sodium carbonate hindered the reduction process of hematite. This research provides important insights into the efficient and clean reduction of hematite in red mud.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Chemical
Zhenya Zhou, Yimin Zhu, Jianping Jin, Yuexin Han, Zhe Bai, Zhidong Tang
Summary: Vanadium is an important rare metal element that is stored in large quantities in shale ore in China. Muscovite-type vanadium shale, a typical refractory vanadium ore, can be effectively treated using roasting pretreatment to enhance vanadium extraction efficiency.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Chemical
Qiang Zhang, Yongsheng Sun, Shuai Wang, Yuexin Han, Wenbo Li, Yanjun Li
Summary: This research proposes a surface magnetization roasting technology that only requires partial reconstitution of hematite, reducing energy consumption and carbon emissions while achieving efficient iron recovery.
Article
Engineering, Chemical
Zhenya Zhou, Jianping Jin, Yimin Zhu, Yuexin Han, Zhe Bai, Zhidong Tang
Summary: This study systematically investigated the mechanism and influencing factors of vanadium extraction from shale ore during suspension oxidation roasting. The results showed that 900 degrees C was the optimal roasting temperature for obtaining a better vanadium leaching efficiency. XRD analysis and SEM analysis explained the reasons for the changes in vanadium leaching rate with roasting temperature.
ADVANCED POWDER TECHNOLOGY
(2023)
Article
Engineering, Chemical
Yaxiong An, Peng Gao, Jianwen Yu, Yuexin Han
Summary: The reduction behavior of different size fractions of high-purity hematite was investigated to address the asynchronous reaction issue in heterogeneous and complex refractory iron ore. The results indicated that reducing the ore size promoted the transformation from hematite to magnetite, with the newly formed magnetite exhibiting a loose porous structure. This structure facilitated the contact between CO gas and the new hematite surface. However, an increase in ore particle size increased CO diffusion resistance, resulting in an asynchronous reaction.
ADVANCED POWDER TECHNOLOGY
(2022)
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
Green & Sustainable Science & Technology
Chao Chen, Yuexin Han, Yushu Zhang, Yachuan Liu, Yingzhi Liu
Summary: This paper studies the efficient utilization of mixed iron ore with siderite and hematite, and proposes a method of suspension magnetization roasting followed by low-intensity magnetic separation. The results show that this method can achieve high iron grade and recovery rate. These findings provide reference for the development and utilization of mixed iron ore.
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
Chemistry, Multidisciplinary
Shuai Yuan, Ruofeng Wang, Qi Zhang, Yanjun Li, Peng Gao
Summary: By using suspension magnetizing roasting - magnetic separation technology, iron was successfully extracted from fine-grained complex hematite ore. The optimized conditions were a roasting temperature of 500 degrees Celsius, roasting time of 12 minutes, reductant concentration of 30%, and total gas flow of 200 mL/min. Analysis showed that hematite was transformed into magnetite during roasting, improving the porous structure of the product and enhancing internal gas diffusion and reduction rate.
KOREAN JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Qiang Zhang, Yongsheng Sun, Yuexin Han, Yanjun Li, Peng Gao
Summary: In order to develop limonite and reduce CO2 emissions, siderite is proposed as a clean reductant for suspension magnetization roasting (SMR) of limonite. The study successfully achieved the conversion of weak magnetic minerals to strong magnetic minerals through SMR, enabling the recovery of iron via magnetic separation. The use of siderite as a reductant in SMR has great potential and is encouraged.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2023)