Effect of Thermal Treatment of Bauxite Ore on Carbon (Organic and Inorganic) Content and Solubility in Bayer Process Liquor

2013 ◽  
Vol 52 (4) ◽  
pp. 1434-1438 ◽  
Author(s):  
Max A. Wellington
Keyword(s):  
Thermal Treatment ◽  
Bayer Process ◽  
Inorganic Content ◽  
Bauxite Ore ◽  
Process Liquor

scholarly journals Effect of red mud addition on the corrosion parameters of reinforced concrete evaluated by electrochemical methods

2012 ◽  
Vol 5 (4) ◽  
pp. 451-467 ◽  
Author(s):  
D.V. Ribeiro ◽  
J.A. Labrincha ◽  
M.R. Morelli
Keyword(s):  
Electrical Resistivity ◽  
Reinforced Concrete ◽  
Red Mud ◽  
Corrosion Potential ◽  
Corrosion Process ◽  
Bayer Process ◽  
Alumina Production ◽  
High Ph ◽  
High Electrical Resistivity ◽  
Bauxite Ore

Red mud, the main waste generated in aluminum and alumina production from bauxite ore by the Bayer process, is considered "hazardous" due to its high pH. The high pH also provides greater protection of rebars, which is reflected in the low corrosion potential and high electrical resistivity (filler effect) of concrete. The corrosion potential was monitored by electrochemical measurements and the electrical resistivity was evaluated using sensors embedded in concrete test specimens. The results showed that the addition of red mud is beneficial to concrete, reducing its corrosion potential and increasing its electrical resistivity. Red mud proved to be a promising additive for concrete to inhibit the corrosion process.

scholarly journals Extraction of gallium from simulated Bayer process liquor by Kelex 100 dissolved in ionic liquids

2020 ◽  
Vol 49 (11) ◽  
pp. 3532-3544 ◽  
Author(s):  
Stijn Raiguel ◽  
Wim Dehaen ◽  
Koen Binnemans
Keyword(s):  
Ionic Liquids ◽  
Bayer Process ◽  
Process Liquor

Ionic liquids are shown to beneficially influence the extraction of gallium by Kelex® 100 from alkaline Bayer process liquors.

Determining silica solubility in bayer process liquor

JOM ◽  
1998 ◽  
Vol 50 (11) ◽  
pp. 44-49 ◽  
Author(s):  
H. Müller-Steinhagen
Keyword(s):  
Bayer Process ◽  
Process Liquor

Separation of Humic Acids from Bayer Process Liquor by Membrane Filtration∗

1994 ◽  
Vol 29 (8) ◽  
pp. 1011-1028 ◽  
Author(s):  
FAROUT T. AWADALLA ◽  
OLEH KUTOWY ◽  
AL TWEDDLE ◽  
JOHN D. HAZLETT
Keyword(s):  
Humic Acids ◽  
Membrane Filtration ◽  
Bayer Process ◽  
Process Liquor

Impact of Bayer Process Liquor Impurities on Causticization

2007 ◽  
Vol 46 (15) ◽  
pp. 5094-5099 ◽  
Author(s):  
Max Wellington ◽  
Franklin Valcin
Keyword(s):  
Bayer Process ◽  
Process Liquor

Solvent extraction of gallium from an Indian Bayer process liquor using Kelex-100

1996 ◽  
Vol 9 (10) ◽  
pp. 1049-1058 ◽  
Author(s):  
G.V.K. Puvvada ◽  
K. Chandrasekhar ◽  
P. Ramachandrarao
Keyword(s):  
Solvent Extraction ◽  
Bayer Process ◽  
Process Liquor

Recovering gallium from residual bayer process liquor

JOM ◽  
1991 ◽  
Vol 43 (6) ◽  
pp. 37-39 ◽  
Author(s):  
Maria Elizabeth Afonso de Magalhães ◽  
Matthieu Tubino
Keyword(s):  
Bayer Process ◽  
Process Liquor

scholarly journals Unraveling the Properties of Biomass-Derived Hard Carbons upon Thermal Treatment for a Practical Application in Na-Ion Batteries

Energies ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3513
Author(s):  
Carolina del Mar Saavedra Rios ◽  
Loïc Simonin ◽  
Arnaud de Geyer ◽  
Camelia Matei Ghimbeu ◽  
Capucine Dupont
Keyword(s):  
Thermal Treatment ◽  
Wheat Straw ◽  
High Performance ◽  
Coulombic Efficiency ◽  
Low Cost ◽  
Calcium Content ◽  
Reversible Capacity ◽  
Hard Carbon ◽  
Inorganic Content ◽  
Precursor Composition

Biomass is gaining increased attention as a sustainable and low-cost hard carbon (HC) precursor. However, biomass properties are often unexplored and unrelated to HC performance. Herein, we used pine, beechwood, miscanthus, and wheat straw precursors to synthesize HCs at 1000 °C, 1200 °C and 1400 °C by a two-steps pyrolysis treatment. The final physicochemical and electrochemical properties of the HC evidenced dissimilar trends, mainly influenced by the precursor’s inorganic content, and less by the thermal treatment. Pine and beechwood HCs delivered the highest reversible capacity and coulombic efficiency (CE) at 1400 °C of about 300 mAh·g−1 and 80%, respectively. This performance can be attributed to the structure derived from the high carbon purity precursors. Miscanthus and wheat straw HC performance was strongly affected by the silicon, potassium, and calcium content in the biomasses, which promoted simultaneous detrimental phenomena of intrinsic activation, formation of a silicon carbide phase, and growth of graphitic domains with temperature. The latter HCs delivered 240–200 mAh·g−1 of reversible capacity and 70–60% of CE, respectively, at 1400 °C. The biomass precursor composition, especially its inorganic fraction, seems to be a key parameter to control, for obtaining high performance hard carbon electrodes by direct pyrolysis process.

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