Recovery of ferric oxide from bayer red mud by reduction roasting-magnetic separation process

2016 ◽  
Vol 31 (2) ◽  
pp. 404-407 ◽  
Author(s):  
Yanjie Liu ◽  
Kesheng Zuo ◽  
Guang Yang ◽  
Zhe Shang ◽  
Jianbin Zhang
Keyword(s):  
Magnetic Separation ◽  
Ferric Oxide ◽  
Red Mud ◽  
Separation Process ◽  
Reduction Roasting ◽  
Bayer Red Mud

Comprehensive Recovery of Iron and Aluminum from Ordinary Bayer Red Mud by Reductive Sintering–Magnetic Separation–Digesting Process

JOM ◽  
2019 ◽  
Vol 71 (9) ◽  
pp. 2936-2943 ◽  
Author(s):  
Feng Gao ◽  
Jihao Zhang ◽  
Xinjie Deng ◽  
Kaituo Wang ◽  
Chunlin He ◽  
...  
Keyword(s):  
Magnetic Separation ◽  
Red Mud ◽  
Bayer Red Mud ◽  
Comprehensive Recovery

Study on Recovering Iron from Shandong Red Mud Based on Gas Reduction Reaction

2015 ◽  
Vol 1092-1093 ◽  
pp. 1041-1045
Author(s):  
Xing Wu Hou ◽  
Yu Min Wu ◽  
Ding Guo Huang ◽  
Yan Yang Gao ◽  
Jian Guo Liao ◽  
...  
Keyword(s):  
Magnetic Separation ◽  
Red Mud ◽  
Direct Reduction ◽  
Reduction Reaction ◽  
Raw Material ◽  
Magnetic Separations ◽  
Bayer Red Mud ◽  
Roasting Temperature ◽  
Reduction Effect ◽  
Basic Characteristics

Based on Shandong Renping Bayer red mud as the raw material, analyzing its basic characteristics, the result is that the content of total iron in red mud is 29.55%. Gas-based high-temperature direct reduction experiments are made by using a gas mixture of CO and H2O as a reducing agent. And then the reduction effect was investigated by magnetic separation experiments, to realize that separation of iron minerals from red mud. The results show that the consequent of the magnetic separation is improved obviously with the temperature rising. Under these conditions, namely, the roasting temperature being 1050°C, the roasting time lasting 90 minutes, the reduction gas rate being 0.7 m3/min, the magnetic field being 2.2A, and three magnetic separations, the iron recovery ratio in red mud is over 97%.

scholarly journals Influence of Na2CO3 and K2CO3 Addition on Iron Grain Growth during Carbothermic Reduction of Red Mud

Metals ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1313 ◽  
Author(s):  
Dmitry Zinoveev ◽  
Pavel Grudinsky ◽  
Andrey Zakunov ◽  
Artem Semenov ◽  
Maria Panova ◽  
...  
Keyword(s):  
Magnetic Separation ◽  
Grain Growth ◽  
Red Mud ◽  
Carbothermic Reduction ◽  
Reduction Roasting ◽  
Alumina Production ◽  
Iron Aluminum ◽  
Bauxite Ore ◽  
Hsc Chemistry ◽  
Sodium And Potassium

Red mud is a by-product of alumina production from bauxite ore by the Bayer method, which contains considerable amounts of valuable components such as iron, aluminum, titanium, and scandium. In this study, an approach was applied to extract iron, i.e., carbothermic reduction roasting of red mud with sodium and potassium carbonates followed by magnetic separation. The thermodynamic analysis of iron and iron-free components’ behavior during carbothermic reduction was carried out by HSC Chemistry 9.98 (Outotec, Pori, Finland) and FactSage 7.1 (Thermfact, Montreal, Canada; GTT-Technologies, Herzogenrath, Germany) software. The effects of the alkaline carbonates’ addition, as well as duration and temperature of roasting on the iron metallization degree, iron grains’ size, and magnetic separation process were investigated experimentally. The best conditions for the reduction roasting were found to be as follows: 22.01% of K2CO3 addition, 1250 °C, and 180 min of duration. As a generalization of the obtained data, the mechanism of alkaline carbonates’ influence on iron grain growth was proposed.

Iron Recovery from Red Mud by Reduction Roasting-Magnetic Separation

2013 ◽  
pp. 125-130 ◽  
Author(s):  
Mingjun Rao ◽  
Jinqiang Zhuang ◽  
Guanghui Li ◽  
Jinghua Zeng ◽  
Tao Jiang
Keyword(s):  
Magnetic Separation ◽  
Red Mud ◽  
Reduction Roasting ◽  
Iron Recovery

Recovery of alumina and ferric oxide from Bayer red mud rich in iron by reduction sintering

2009 ◽  
Vol 19 (5) ◽  
pp. 1342-1347 ◽  
Author(s):  
Xiao-bin LI ◽  
Wei XIAO ◽  
Wei LIU ◽  
Gui-hua LIU ◽  
Zhi-hong PENG ◽  
...  
Keyword(s):  
Ferric Oxide ◽  
Red Mud ◽  
Bayer Red Mud

Iron Recovery from Red Mud by Reduction Roasting-Magnetic Separation

2016 ◽  
pp. 125-130 ◽  
Author(s):  
Mingjun Rao ◽  
Jinqiang Zhuang ◽  
Guanghui Li ◽  
Jinghua Zeng ◽  
Tao Jiang
Keyword(s):  
Magnetic Separation ◽  
Red Mud ◽  
Reduction Roasting ◽  
Iron Recovery

scholarly journals Recovery of γ-Fe2O3 from copper ore tailings by magnetization roasting and magnetic separation

2021 ◽  
Vol 19 (1) ◽  
pp. 128-137
Author(s):  
Bing Luo ◽  
Tongjiang Peng ◽  
Hongjuan Sun
Keyword(s):  
Magnetic Separation ◽  
Magnetic Field Intensity ◽  
Sodium Dodecyl ◽  
Separation Process ◽  
Sodium Dodecyl Sulfonate ◽  
Copper Ore ◽  
Yield Rate ◽  
Optimum Parameters ◽  
Roasting Temperature ◽  
Mineralogical Phase

Abstract To comprehensively reuse copper ore tailings, the recovery of γ-Fe2O3 from magnetic roasted slag after sulfur release from copper ore tailings followed by magnetic separation is performed. In this work, after analysis of chemical composition and mineralogical phase composition, the effects of parameters in both magnetization roasting and magnetic separation process with respect to roasting temperature, residence time, airflow, particle size distribution, magnetic field intensity, and the ratio of sodium dodecyl sulfonate to roasted slag were investigated. Under optimum parameters, a great number of γ-Fe2O3 is recycled with a grade of 66.86% and a yield rate of 67.21%. Meanwhile, the microstructure, phase transformation and magnetic property of copper ore tailings, roasted slag, and magnetic concentrate are carried out.

scholarly journals Influence of Sodium Sulfate Addition on Iron Grain Growth during Carbothermic Roasting of Red Mud Samples with Different Basicity

Metals ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1571
Author(s):  
Pavel Grudinsky ◽  
Dmitry Zinoveev ◽  
Denis Pankratov ◽  
Artem Semenov ◽  
Maria Panova ◽  
...  
Keyword(s):  
Magnetic Separation ◽  
Grain Growth ◽  
Red Mud ◽  
Sodium Sulfate ◽  
Phase Distribution ◽  
Solid Phase ◽  
Alumina Production ◽  
Metallic Particles ◽  
Iron Phase ◽  
High Alkalinity

Red mud is an iron-containing waste of alumina production with high alkalinity. A promising approach for its recycling is solid-phase carbothermic roasting in the presence of special additives followed by magnetic separation. The crucial factor of the separation of the obtained iron metallic particles from gangue is sufficiently large iron grains. This study focuses on the influence of Na2SO4 addition on iron grain growth during carbothermic roasting of two red mud samples with different (CaO + MgO)/(SiO2 + Al2O3) ratio of 0.46 and 1.21, respectively. Iron phase distribution in the red mud and roasted samples were investigated in detail by Mössbauer spectroscopy method. Based on thermodynamic calculations and results of multifactorial experiments, the optimal conditions for the roasting of the red mud samples with (CaO + MgO)/(SiO2 + Al2O3) ratio of 0.46 and 1.21 were duration of 180 min with the addition of 13.65% Na2SO4 at 1150 °C and 1350 °C followed by magnetic separation that led to 97% and 83.91% of iron recovery, as well as 51.6% and 83.7% of iron grade, respectively. The mechanism of sodium sulfate effect on iron grain growth was proposed. The results pointed out that Na2SO4 addition is unfavorable for the red mud carbothermic roasting compared with other alkaline sulfur-free additives.

Recovering metals from red mud by thermal treatment and magnetic separation

JOM ◽  
1996 ◽  
Vol 48 (1) ◽  
pp. 25-28 ◽  
Author(s):  
Paolo Plescia ◽  
Dante Maccari
Keyword(s):  
Thermal Treatment ◽  
Magnetic Separation ◽  
Red Mud

Re-enactment of retrieving lithium ion batteries by sensor ore and magnetic separation process

2020 ◽  
Author(s):  
R. A. Sunmati ◽  
S. V. Tarini ◽  
S. Pooja ◽  
V. Swetha ◽  
S. Thaarini ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Magnetic Separation ◽  
Lithium Ion ◽  
Separation Process
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