Selective separation of iron and scandium from Bayer Sc-bearing red mud

Xiao, Junhui; Zou, Kai; Zhong, Nanlan; Gao, Deqiang

doi:10.1016/j.jre.2022.06.003

Cited by 27 publications

(8 citation statements)

References 37 publications

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“…Higher saturation magnetization means higher magnetic properties, making it easier to separate the products under the influence of an external magnetic field with equal strength. 53…”

Section: Resultsmentioning

confidence: 99%

“…Higher saturation magnetization means higher magnetic properties, making it easier to separate the products under the influence of an external magnetic field with equal strength. 53 Wet magnetic separation was employed to recover residual high-value metals from the ultrasonic-assisted water leaching residue. From Fig.…”

Section: Wet Magnetic Separation-sulfuric Acid Leachingmentioning

confidence: 99%

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Stepwise recycling of valuable metals from spent lithium-ion batteries based on in situ thermal reduction and ultrasonic-assisted water leaching

Ding,

Bao,

Zhang

et al. 2023

Green Chem.

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“…Higher saturation magnetization means higher magnetic properties, making it easier to separate the products under the influence of an external magnetic field with equal strength. 53…”

Section: Resultsmentioning

confidence: 99%

Section: Wet Magnetic Separation-sulfuric Acid Leachingmentioning

confidence: 99%

Stepwise recycling of valuable metals from spent lithium-ion batteries based on in situ thermal reduction and ultrasonic-assisted water leaching

Ding,

Bao,

Zhang

et al. 2023

Green Chem.

Self Cite

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“…The red mud produced by the production process of ear alumina in Wenshan city, Yunnan Province, and the test samples contained 31.11% TFe and 0.0045% Sc [7]. Scandium and iron could be extracted from red mud, the optimal leaching process conditions were determined and the leaching kinetics were determined.…”

Section: Recycling Scandium From Red Mud By Ion Exchange Methodsmentioning

confidence: 99%

Critical applications of scandium and progress in the extraction of different scandium resources

Su,

Tan,

Wang

2024

E3S Web Conf.

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Scandium can used in unique electronic or alloying materials such as aluminum-scandium alloys, magnesia-scandium alloys, laser glasses, superconductors and electronic components. However, there is no single scandium mine in the world. Scandium is usually associated with other minerals and is found in very low amounts. Therefore, it is very difficult to obtain scandium and it is of great significance to explore the appropriate extraction process for the production of scandium. This paper highlights key applications of scandium, resource characterization, and production advances with less polluting. It provides environmentally friendly methods for improve scandium product recovery, and optimize the existing process.

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“…As a major producer of alumina, China produced more than 120 million tons of red mud in 2022, with a cumulative stockpile of 1.7 billion tons. Red mud created with the Bayer process is used as an industrial by-product for other applications, such as building materials [1][2][3][4][5][6] and environmental [7][8][9][10], chemical [2,[11][12][13][14][15], agronomic [16][17][18][19], metallurgical [20][21][22] processes, and so on. Currently, building materials consume reused red mud the most.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Alkali in Bayer Red Mud: Content and Occurrence State in Different Structures

Wang,

Jing,

Zhang

et al. 2023

Sustainability

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The application of large amounts of red mud in the field of building materials is one of the main ways to reuse this material, but the high alkali content of red mud limits its application. In this paper, the washable alkali, removable alkali, and lattice alkali contents of Bayer red mud were studied, and the occurrence states of potassium and sodium in red mud were studied using XRD, IR, XPS, and NMR. On this basis, the removal mechanism for potassium and sodium in red mud was analyzed. The results showed that the Na in the red mud was mainly deposited in the shelf silicon voids of hydroxy sodalite (Na8(AlSiO4)6(OH)2(H2O)2) in the form of Si-O-Na or Al-O-Na. K is deposited in the shelf silico-oxygen void of potassium feldspar (KAlSi3O8) in the form of Si-O-K or Al-O-K. The washable Na and K contents of the mud were 13.7% and 4.47%; the alkali removal agent CaO removed 83.1% and 50.8% of Na and K in the red mud; and the lattice alkali Na and K contents were 3.20% and 44.8%, respectively. In the process of red mud dealkalization, Ca2+ ions can enter the internal voids of the hydroxyl sodalite and potassium feldspar silica skeleton and then replace Al3+ in the Si-O skeleton and Na+ and K+ in the skeleton voids. The replacement reaction changes the silica tetrahedron network structure, resulting in the disintegration of the frame-like silica tetrahedron in the hydroxyl sodalite and potassium feldspar, forming an isolated, island-like silica tetrahedron in hydrated garnet.

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Selective separation of iron and scandium from Bayer Sc-bearing red mud

Cited by 27 publications

References 37 publications

Stepwise recycling of valuable metals from spent lithium-ion batteries based on in situ thermal reduction and ultrasonic-assisted water leaching

Stepwise recycling of valuable metals from spent lithium-ion batteries based on in situ thermal reduction and ultrasonic-assisted water leaching

Critical applications of scandium and progress in the extraction of different scandium resources

Analysis of Alkali in Bayer Red Mud: Content and Occurrence State in Different Structures

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