Article
Chemistry, Multidisciplinary
Qi Zhang, Yongsheng Sun, Yuexin Han, Yanjun Li, Peng Gao
Summary: A green self-magnetization roasting technology for producing magnetite without additional additives was proposed and investigated in this study. The study revealed the regulatory mechanisms of main factors on the roasting process and showed that the process can be divided into two stages based on kinetic and phase transformation results. High-quality iron concentrate was obtained under optimal roasting conditions.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
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
Materials Science, Multidisciplinary
Dingzheng Wang, Jian Pan, Deqing Zhu, Zhengqi Guo, Congcong Yang, Zhuang Yuan
Summary: In this study, a new process for separating and recovering iron from siderite ore with high magnesium and manganese was developed, achieving a high-grade iron concentrate through pre-oxidation and magnetization roasting. Pre-oxidation improved the reduction efficiency in magnetization roasting, leading to the removal of most gangue minerals while retaining manganese and some magnesium in the final concentrate.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
Yanxin Chen, Chao Yang, Shaowu Jiu, Bo Zhao, Qiang Song
Summary: This study investigated the magnetic properties of roasted siderite ores and analyzed their washability under weak-magnetic-field conditions. The findings provide important reference for the development and application of siderite suspension magnetization roasting technology.
Article
Engineering, Chemical
Shaowu Jiu, Mingkang Lin, Bo Zhao, Yanxin Chen, Chao Yang
Summary: Realizing the large-scale development and utilization of siderite, a difficult iron ore reserve, has great practical significance in ensuring the supply of iron ore resources. Therefore, a new in-house conveyor bed magnetization roasting-dry cooling process was pilot-tested using low-grade siderite from the Daxigou iron ore mine.
Article
Materials Science, Multidisciplinary
Haoyan Sun, Zheng Zou, Meiju Zhang, Dong Yan
Summary: This study proposes a fluidized preoxidation-low-temperature reduction magnetization roasting process for the utilization of low-grade refractory siderite-containing iron ore. Through experiments, it was found that the γ-Fe2O3 generated during air oxidation roasting would further convert into weakly magnetic FeO. Stable magnetite can only be obtained through reduction of γ-Fe2O3 at low temperatures. The optimal process parameters for fluidized magnetization roasting were determined to be preoxidation at 610°C for 2.5 min, followed by reduction at 450°C for 5 min. The iron ore concentrate obtained through weak magnetic separation had a grade of 62.0wt% and an iron recovery rate of 88.36%. Compared to conventional direct reduction magnetization roasting, the weak magnetic separation greatly improved the iron recovery by 34.33%. The proposed roasting process enables efficient utilization of low-grade refractory siderite-containing iron ore without wustite generation, and it is not limited by the proportion of siderite and hematite in the ore.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Xinlei Wei, Yongsheng Sun, Yanjun Li, Peng Gao
Summary: This paper investigates the reduction roasting and magnetic separation of cobalt oxide ore, and obtains the optimal magnetic separation performance. It also explores the phase transformation and surface structure changes of the sample during roasting.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(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
Engineering, Chemical
V. Nunna, S. Hapugoda, M. I. Pownceby, G. J. Sparrow
Summary: Microwave-assisted reduction roasting of reject iron ore waste stream rich in goethite was used to produce high-grade concentrate, with optimal conditions leading to conversion of goethite to synthetic magnetite. Higher reduction temperatures led to greater conversion of goethite to magnetite, but caution is needed to avoid over-reduction which could complicate subsequent beneficiation processes.
MINERALS ENGINEERING
(2021)
Article
Chemistry, Physical
Shaowu Jiu, Bo Zhao, Chao Yang, Yanxin Chen, Fuan Cheng
Summary: Upgrading and utilizing low-grade iron ore is important for improving iron ore resource supply security. This study investigated the reaction mechanism and kinetics of Daxigou siderite using a thermal analysis-infrared analysis-in-situ IR method. The results show that magnetite can be formed by decomposing iron carbonate in siderite under certain conditions. Magnetization roasting at specific temperatures and time can achieve high magnetic conversion rate of the iron minerals in the siderite. A beneficiation process was adopted to obtain high-grade concentrate.
Article
Green & Sustainable Science & Technology
Junhui Xiao, Wenliang Xiong, Kai Zou, Tao Chen, Hong Li, Zhen Wang
Summary: By investigating magnesia-nickel silicate ore, it was found that adding red mud enhanced the transformation of nickel silicate to a strongly magnetic mineral mainly comprising metallic Ni. Through chloride roasting and magnetic separation, a Ni concentrate with Fe3O4, metallic Fe, and metallic Ni as the major minerals was obtained, with good agreement between thermodynamic calculations and test results.
JOURNAL OF SUSTAINABLE METALLURGY
(2021)
Article
Green & Sustainable Science & Technology
Xinran Zhu, Qiang Zhang, Yongsheng Sun, Yanjun Li, Yuexin Han
Summary: This study presents a fluidization roasting technology for siderite-bearing iron ore without the use of carbon additives. The effects of different parameters on the magnetic separation performance were explored, and the samples were characterized using various methods. The results showed that it is possible to obtain high-grade and high-recovery iron concentrate under specific conditions.
Article
Materials Science, Multidisciplinary
Ali Dad Chandio, Iftikhar Ahmed Channa, Asif Ahmed Shaikh, Shabbir Madad, Syed Bilal Hasan Rizvi, Aqeel Ahmed Shah, Jaweria Ashfaq, Muhammad Ali Shar, Abdulaziz Alhazaa
Summary: This research aims to upgrade indigenous Pakistani iron ore through common metallurgical processes. Magnetic properties of the ore were determined, and high-temperature reduction roasting process and magnetic separation process were used to increase the iron concentration. Results showed that the iron concentration increased from 34 wt. % to 56 wt. % at 900°C temperature, coal-to-ore ratio of 20 wt. %, and 2 hours of reduction time, and magnetic properties were induced.
Article
Engineering, Chemical
Liqun Luo, Xiaoxue Zhang, Hongyang Wang, Botao Zheng, Chenxi Wei
Summary: Iron in refractory iron ore was enriched through reduction roasting and magnetic separation, with the deep reduction-magnetic separation method found to be more suitable for iron enrichment. Phase transformations during reduction roasting were investigated, revealing the formation of main phases of magnetite and metallic iron in the reductively roasted product.
Article
Engineering, Chemical
Sunil Kumar Tripathy, Y. Rama Murthy, Nikkam Suresh, Lev O. Filippov
Summary: The study investigates the recovery of chromite from low-grade ferruginous ore using carbothermic magnetization route with conventional and microwave heating sources. Alteration of crystalline structure and magnetic property of gangue minerals enables the separation of low-grade ore through magnetic separation. The research achieved successful upgrading of the ore through optimal roasting conditions and under microwave radiation, with discussion of findings through characterization tools.
ADVANCED POWDER TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Tiejun Chun, Deqing Zhu
HIGH TEMPERATURE MATERIALS AND PROCESSES
(2016)
Article
Metallurgy & Metallurgical Engineering
T. Chun, H. Long, Z. Di, P. Wang, Q. Meng
IRONMAKING & STEELMAKING
(2017)
Article
Metallurgy & Metallurgical Engineering
Zhanxia Di, Tiejun Chun, Hongming Long, Qingmin Meng, Wang Ping, Jialong Yang
METALLURGICAL RESEARCH & TECHNOLOGY
(2017)
Article
Materials Science, Multidisciplinary
Hongming Long, Xuejian Wu, Tiejun Chun, Jiaxin Li, Ping Wang, Qingmin Meng, Zhanxia Di, Xiangyang Zhang
HIGH TEMPERATURE MATERIALS AND PROCESSES
(2017)
Article
Materials Science, Multidisciplinary
Tiejun Chun, Hongming Long, Zhanxia Di, Qingmin Meng, Ping Wang
HIGH TEMPERATURE MATERIALS AND PROCESSES
(2017)
Article
Engineering, Environmental
Tiejun Chun, Hongming Long, Zhanxi Di, Xiangyang Zhang, Xuejian Wu, Lixin Qian
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2017)
Article
Metallurgy & Metallurgical Engineering
Hongming Long, Tiejun Chun, Zhanxia Di, Qingmin Meng, Ping Wang
METALLURGICAL RESEARCH & TECHNOLOGY
(2017)
Article
Engineering, Environmental
Lixin Qian, Tiejun Chun, Hongming Long, Jiaxin Li, Zhanxia Di, Qingmin Meng, Ping Wang
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2018)
Article
Materials Science, Multidisciplinary
Li-xin Qian, Tie-jun Chun, Hong-ming Long, Qing-min Meng
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2020)
Article
Chemistry, Physical
Qi Shi, Ding Long, Hong-Ming Long, Tie-Jun Chun
Article
Engineering, Environmental
Lixin Qian, Yifan Wang, Mingliang Liu, Yulin Hu, Tiejun Chun, Qingmin Meng, Hongming Long, Ya Wang
Summary: The study found that industrial urea can significantly reduce the emission concentration of PCDD/Fs in municipal solid waste incinerators and lower costs, inhibiting the de novo synthesis of PCDD/Fs.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Geochemistry & Geophysics
Meng-Bo Dai, Bao-Shu Gu, Zhi-Yong Ruan, Zi-Hong Wang, Bang-Cao Luo, Tie-Jun Chun
Summary: High-pressure grinding roller (HPGR) can improve the specific surface area (SSA) of iron concentrate, enhancing the pelletability and quality of oxidized pellets. Increasing SSA improves the compressive strength of pellets and accelerates the oxidation of magnetite. Low porosity and hematite crystallization support the strength enhancement due to high SSA.
Article
Metallurgy & Metallurgical Engineering
T-J Chun, G-T Mu, Q-M Meng, H-M Long, P. Wang, C-G Bi
JOURNAL OF MINING AND METALLURGY SECTION B-METALLURGY
(2019)
Article
Metallurgy & Metallurgical Engineering
T. Chun, G. Mu, Z. Di, H. Long, C. Ning, D. Li
ARCHIVES OF METALLURGY AND MATERIALS
(2018)
Article
Metallurgy & Metallurgical Engineering
T. Chun, D. Li, Z. Di, H. Long, L. Tang, F. Li, Y. Li
JOURNAL OF THE SOUTHERN AFRICAN INSTITUTE OF MINING AND METALLURGY
(2017)
