Results 1 to 10 of about 269,018 (211)

Alkali-reduced Bauxite Residue as Novel SCM [PDF]

Nordic Concrete Research, 2020
Bauxite residue is a major waste stream available in large volumes globally that can cause risks to the surrounding environment (e.g. ecotoxicity) when disposed and stored by conventional methods.
Danner Tobias, Sletnes Malin, Justnes Harald   +2 more
doaj   +2 more sources

Extraction of scandium from bauxite residue by high-pressure leaching in sulfuric acid solution [PDF]

Heliyon, 2023
Rare earth elements, such as yttrium, scandium, neodymium, and praseodymium, have been reported to be associated with minerals in bauxite and transferred to the refining residue when bauxite is refined to alumina (Al2O3) by Bayer Process.
M.R. Kanekaputra, M.Z. Mubarok
doaj   +2 more sources

Co-Calcination of Bauxite Residue With Kaolinite in Pursuit of a Robust and High-Quality Supplementary Cementitious Material

Frontiers in Materials, 2022
The present article investigates the potential of co-calcination with kaolinite as a sector-wide solution for the transformation of bauxite residue into an effective supplementary cementitious material (SCM).
Arne Peys, Tobias Hertel, Ruben Snellings   +2 more
doaj   +1 more source

Recovery of Scandium, Aluminum, Titanium, and Silicon from Iron-Depleted Bauxite Residue into Valuable Products: A Case Study

Crystals, 2022
Bauxite residue is a high-iron waste of the alumina industry with significant contents of scandium, aluminum, and titanium. This study focuses on the recovery of Sc, Al, Ti, and Si from iron-depleted bauxite residue (IDBR) into valuable products.
Pavel Grudinsky, Liliya Pasechnik, Anfisa Yurtaeva, Valery Dyubanov, Dmitry Zinoveev   +4 more
doaj   +1 more source

The aggregation effect of organic matter on bauxite residue particles and its improvement mechanism

Frontiers in Environmental Science, 2023
Introduction: Understanding organic amendment and the agglomeration of bauxite residue particles is vital to soil amelioration of bauxite residues. In this study, a pot culture experiment was conducted to illustrate the aggregation of organic amendment ...
Mengyang Dong, Guizhen Wang, Zafran Gul Wazir, Jing Liu, Guoqin Hou, Xinyu Gao, Liang Chao, Fangxu Rong, Yuzhi Xu, Mingyue Li, Kai Liu, Aiju Liu, Hongliang Liu   +12 more
doaj   +1 more source

Reduction behavior of iron in the red mud [PDF]

Journal of Mining and Metallurgy. Section B: Metallurgy, 2021
Red mud or bauxite residue contains significant quantities of industrial metals such as Fe, Al, and Ti, as well as rare earth elements such as Sc, Ce, and La.
Eray S., Keskinkilic E., Topkaya Y.A., Geveci A.   +3 more
doaj   +1 more source

Direct Phosphoric Acid Leaching of Bauxite Residue for Selective Scandium Extraction

Metals, 2022
Bauxite residue, the high alkaline and fine-grained byproduct of Bayer process for alumina’s production, is a material rich in numerous minerals and elements of high value and techno-economical interest in high tech applications such as rare earths ...
Lamprini-Areti Tsakanika, George Panagiotatos, Theopisti Lymperopoulou, Elias Chatzitheodoridis, Klaus Ochsenkühn, Maria Ochsenkühn-Petropoulou   +5 more
doaj   +1 more source

An Investigation on Reduction of Calcium Added Bauxite Residue Pellets by Hydrogen and Iron Recovery through Physical Separation Methods

Metals, 2023
This study investigates the properties of H2-reduced calcium-added bauxite residue, self-hardened pellets, and the feasibility of iron recovery through electrostatic and magnetic separation methods.
Ahmad Hassanzadeh, Manish K. Kar, Jafar Safarian, Przemyslaw B. Kowalczuk   +3 more
doaj   +1 more source

Influence of free silica in the production of synthetic aggregates from bauxite residue

Cerâmica, 2023
The residue from the Bayer process has physicochemical characteristics that allow its use in the production of synthetic aggregate, although some characteristics such as low plasticity and water absorption still need better control.
M. B. de Vilhena, B. M. Viegas, J. A. S. Souza, E. N. Macêdo   +3 more
doaj   +1 more source

Lanthanides as impurities in the Bayer production cycle of the aluminum hydroxide from Sierra Leone bauxite

Romanian Journal of Ecology & Environmental Chemistry, 2022
This paper is describing a careful study on content and distribution of rare elements in the fluid and solid phases involved in dry and classified aluminum hydroxide production through Bayer process at Alum SA, Tulcea, Romania.
Lidia Kim, Gheorghe Dobra, Raluca Isopescu, Sorin Iliev, Lucian Cotet, Alina Boiangiu, Gina Alina Catrina, Laurentiu Filipescu   +7 more
doaj   +1 more source