Results 1 to 10 of about 74,781 (265)

Leaching Behavior of Lithium-Bearing Bauxite with High-Temperature Bayer Digestion Process in K₂O-Al₂O₃-H₂O System

Metals, 2021
Lithium is one of the secondary mineral elements occurring in bauxite. The behavior of lithium-bearing bauxite in the digestion process was investigated, and the effect of digestion conditions on the extraction rates of lithium was studied.
Dongzhan Han, Zhihong Peng, Erwei Song, Leiting Shen   +3 more
doaj   +1 more source

Incident Cause Pattern Analysis at Bayer

Chemical Engineering Transactions, 2016
A detailed investigation of each occurred LoPC incident is essential for Bayer to improve safety, avoid future incidents and to strengthen safety awareness.
Jan Weppelmann
doaj   +1 more source

A Self-Consistent, High-Fidelity Adsorption Model for Chromatographic Process Predictions: Low-to-High Load Density and Charge Variants in a Preparative Cation Exchanger

Separations
The development of ion exchange chromatography to polish biopharmaceuticals requires extensive experimental benchmarking. As part of the Design of Experiments (DoE), statistical models increased efficiency somewhat and are still state of the art; however,
Gregor M. Essert, Marko Tesanovic, Sonja Berensmeier, Isabell Hagemann, Peter Schwan   +4 more
doaj   +1 more source

Enhanced Precipitation of Gibbsite from Sodium Aluminate Solution by Adding Agglomerated Active Al(OH)₃ Seed

Metals, 2023
The addition of active seed for increasing the precipitation rate leads to the formation of fine Al(OH)3 particles that complicates separation of solid from the mother liquor.
Andrei Shoppert, Dmitry Valeev, Konstantin Alekseev, Irina Loginova   +3 more
doaj   +1 more source

Estimation of Cleaning Efficiency of Clay Removal from Bauxite [PDF]

International Journal of Economic and Environment Geology, 2018
Bauxite ore is used as the raw material for the production of alumina in the Bayer hydrometallurgical process. Clay agglomerates on the bauxite surface create lot of complications in the Bayer process. Its concentration in the ore is decreased by washing
Ishaq Ahmad, Sajjad Hussain, Anwar Qadir, Naseer Muhammad Khan   +3 more
doaj  

Structure of amorphous aluminosilicates obtained from mineral transformation: Potential path for partial remediation of alkaline bauxite residues

Environmental Advances, 2021
Highly alkaline wastes known as bauxite residue are the abundant byproducts of refining bauxite into alumina through the Bayer process, and worldwide estimates of these bauxite residue stockpiles exceed 3 billion tons, with hundreds of millions of tons ...
David L. Bollinger, Jessica Erickson, Nicholas Stone-Weiss, Arumala Josiah Lere-Adams, Sam Karcher, Idil Deniz Akin, John S. McCloy   +6 more
doaj   +1 more source

Obtaining of transition phases of alumina starting from sodium aluminate in Bayer process [PDF]

Hemijska Industrija, 2011
Transition (active) phases of alumina were synthesized starting from sodium aluminate solution prepared out of Bayer liquor. The neutralisation of sodium aluminate solution was performed by sulphuric acid.
Obrenović Zoran, Filipović Radislav, Milanović Marija, Stijepović Ivan, Nikolić Ljubica M.   +4 more
doaj   +1 more source

Processing of low-quality bauxite feedstock by thermochemistry-Bayer method

Записки Горного института, 2016
The modern production of aluminum which by its global output ranks first among the non-ferrous metals includes three main stages: ore extraction, its processing into alumina and, finally, the production of primary aluminum.
O. A. Dubovikov, E. E. Yaskelyainen
doaj   +1 more source

Acid and Acid-Alkali Treatment Methods of Al-Chloride Solution Obtained by the Leaching of Coal Fly Ash to Produce Sandy Grade Alumina

Metals, 2020
Sandy grade alumina is a valuable intermediate material that is mainly produced by the Bayer process and used for manufacturing primary metallic aluminum.
Dmitry Valeev, Andrei Shoppert, Alexandra Mikhailova, Alex Kondratiev   +3 more
doaj   +1 more source

The Characterization of a Bauxite Waste From The Bayer Process

Sakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2001
The Bayer process for the alumina frombauxite produce a high quantity of waste in the formof mud. This waste -red mud- ııresent seriousproblems on environmental pollution.
Nevin Yalçın, Vahdettin Sevinç
doaj   +1 more source