Results 251 to 260 of about 235,115 (280)

Silicate bonded unsintered ceramics of Bayer process waste

Journal of Materials Research, 1991
Sodium silicates are investigated to enhance the strengths of Bayer process muds and develop structural ceramics without sintering. With an impregnation of sodium silicate from 2% to 10% concentration in red mud, the fracture toughness is enhanced from 0.2 to 0.9 MPa.
Wagh, A.S., Douse, V.E.
openaire   +1 more source

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
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Innovative Process for Boehmite Precipitation in Bayer Circuit

Journal of Sustainable Metallurgy, 2019
JNARDDC is intensely working toward the development of boehmite product hydrate as an intermediate product to reduce energy consumption in the calcination step. The innovative process of modifying the gibbsite seed property to boehmite and using it in precipitation has been thoroughly explored in the study.
Suchita Rai, M. J. Chaddha, K. J. Kulkarni, M. T. Nimje, K. Rajshekhar Rao, P. Mahendiran, R. J. Sharma, A. Agnihotri   +7 more
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Assessment of strength development in Bayer-process residues

Journal of Materials Science, 1992
The strength which develops naturally in dried-out lumps of Bayer-process residue (red mud) is investigated for possible use in building material. The ease with which this strength can be reproduced, and its resistance to wet and dry conditions, are assessed in practical-sized building blocks.
W. R. Pinnock, J. N. Gordon
openaire   +1 more source

Review of Bayer Organics-Oxalate Control Processes

2016
Since the mid-forties, the Aluminum Company of Canada Arvida Research Centre jointly with the Technical Departments of the Bayer Plants have been actively searching for suitable methods of controlling Bayer organics, in general, and sodium oxalate, in particular.
B. Gnyra, G. Lever
openaire   +1 more source

Impact of Bayer Process Liquor Impurities on Causticization

Industrial & Engineering Chemistry Research, 2007
Spent liquor from a high-temperature Jamaican alumina refinery was analyzed to determine levels (g/L) of the following impurities (p = 0.05):  oxalate, 2.74 ± 0.52; sulfate, 23.23 ± 3.00; chloride, 6.36 ± 0.50; fluoride, 2.49 ± 0.05; thiosulfate, 2.47 ± 0.62; ethanoate, 5.16 ± 0.72; and organic carbon, 23.68 ± 1.99.
Max Wellington, Franklin Valcin
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.
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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.
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Determining silica solubility in bayer process liquor

JOM, 1998
The efficient precipitation of dissolved silica from Bayer process liquor is essential for the production of high-quality alumina and the reduction of excessive scaling in the heat exchangers in the evaporation building of Bayer processes. The accurate prediction of silica solubility in Bayer liquor is one of the key parameters in improving the design ...
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Continuous Process for Photodegradation of Industrial Bayer Liquor

Industrial & Engineering Chemistry Research, 2001
Photodegradation of spent Bayer liquor has been carried out in an 18-L pilot-scale continuous annular photoreactor. The performance of the reactor was studied with respect to various process parameters such as the gas flow rate, liquid flow rate, initial solution pH, initial substrate concentration, light intensity, and catalyst loading.
V. K. Pareek, M. P. Brungs, A. A. Adesina   +2 more
openaire   +1 more source