Results 251 to 260 of about 10,616,062 (308)

Thermodynamic simulation of the Bayer process

International Journal of Materials Research, 2008
Abstract The Gibbs energy minimiser incorporated in the thermodynamic subroutine library ChemApp and a thermodynamically consistent, ten-component Bayer liquor model were applied to a simulation of the Bayer process employed worldwide for the refining of alumina from bauxite ores. As well as the liquor cycle from digestion, clarification,
Erich Königsberger
exaly   +2 more sources

Nanofiltration of Bayer process solutions

Journal of Membrane Science, 2006
Abstract The Bayer process is used for refining bauxite into smelting grade alumina (Al2O3), which is the precursor of aluminium. The process was developed and patented by Karl Josef Bayer 110 years ago and has become the cornerstone of the aluminium production industry worldwide.
Philippe Moulin
exaly   +2 more sources

Characterization of red mud derived from a combined Bayer Process and bauxite calcination method

Journal of Hazardous Materials, 2007
Red mud can be derived from the processing of bauxite using different methods. The chemical and mineralogical composition of the combined Bayer Process and bauxite calcination red mud (BPBCRM) differs markedly from those of the pure Bayer Process red mud
Lin, Chuxia, Liu, Yong, Wu, Yonggui
exaly   +2 more sources

Aspen Modeling of the Bayer Process

2016
The ASPEN simulator was used to model Alcoa’s Pt. Comfort Bayer refinery. All areas of the refinery including the lakes and powerhouse were modeled. Each area model was designed to be run stand alone or integrated with others for a full plant model .
J. M. Langa, T. G. Russell, G. A. O’Neill, P. Gacka, V. B. Shah, J. L. Stephenson, J. G. Snyder   +6 more
openaire   +1 more source

Perspective on Bayer Process Energy

2011
The three most important cost items in the production of alumina are bauxite, caustic soda, and energy. Alumina energy cost will likely rise more than other costs because of energy price increases and energy related environmental issues. As energy cost increases, refineries will need to adjust the process to maintain or improve their position on the ...
openaire   +1 more source

Preheaters and Digesters in the Bayer Digestion Process

2016
The existing preheaters and digesters applied in Bayer digestion processes are classified and investigated in this paper. The characteristics and mineral compositions of bauxite to be processed have great effects on the performance and operational efficiency of the preheaters and digesters. Therefore, the design concept and selection principle of Bayer
Gu Songqing, Yin Zhonglin
openaire   +1 more source

Alumina Yield in the Bayer Process

2016
The alumina industry has historically been able to reduce alumina production costs, by increasing the liquor alumina yield. To know the potential for further yield increases, the phase diagram of the ternary system Na2O-Al2O -H2O at various temperature levels was analysed.
openaire   +1 more source

Insoluble Organic Compounds in the Bayer Process

Industrial & Engineering Chemistry Research, 2001
During the dissolution of bauxite in a high-temperature (250−255 °C) Bayer process, which separates aluminum hydroxide and oxide in the ore from iron oxide and other impurities, a number of insolub...
Damian E. Smeulders, Michael A. Wilson, Lyndon Armstrong   +2 more
openaire   +1 more source

Heat Transfer in the Bayer Process

2016
Heat transfer equipment represents a significant portion of Bayer process plant capital and operating costs. Heater operation and maintenance activities can also create potential hazard exposure. Very early flowsheets tended to rely on direct heat transfer, i.e.
openaire   +1 more source

Chemical Reaction Engineering in the Bayer Process

2016
Chemical reaction engineering provides an important link between chemistry (kinetics, thermodynamics) and economics (capital cost, productivity, efficiency). The key elements are interpretation of (batch) laboratory data, application of the resultant models to continuous operations, and industrial equipment selection (and costing).
Daniel Thomas, Benyan Pei
openaire   +1 more source