Results 261 to 270 of about 79,481 (302)
Some of the next articles are maybe not open access.
Organic Control Technologies in Bayer Process
2016Many Bayer plant problems originate from organics contamination of the Bayer liquor. Organics can decrease liquor productivity either by increasing alumina solubility or by covering active sites on alumina hydrate seeds. Organics also induce coloration of the liquor, cause excessive foaming, and increase liquor viscosity, density and boiling point. All
Gervais Soucy +2 more
openaire +1 more source
Alumina Yield in the Bayer Process
2016The 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
Bayer Process Efficiency Improvement
2016The process efficiency has a great influence on the production yield, energy consumption, investment and operation cost in Bayer process.
openaire +1 more source
Investigation of scale formation in the Bayer process [PDF]
, 2003 Aluminosilicate ‘scales’ of the general formula Na8[AlSiO4]6X2.nH2O, X= ½CO3, OH that form during the Bayer process have been investigated. The ‘scales’ are composed of two main aluminosilicate phases, cancrinite and an intergrowth of sodalite and cancrinite, termed “intermediate”. Synthetic scales were prepared from kaolin, sodium hydroxide and sodium
openaire +1 more source
Investigation of zeolite scales formed in the Bayer process
Microporous and Mesoporous Materials, 2000Abstract Synthetic sodium aluminosilicate Bayer refinery scale has been prepared in 8 and 4.2 M sodium hydroxide solutions at four temperatures in the temperature range 80–240°C. The effect of different anions (CO32−, OH− SO42−, Cl− and C2O42−) and varying anion concentrations (10−2–10−1 M) on the type of aluminosilicate phase formed has also been ...
J.A Armstrong, S.E Dann
openaire +1 more source
Assessment of strength development in Bayer-process residues
Journal of Materials Science, 1992The 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
Dynamic Simulation and Control of the Bayer Process. A Review
Industrial & Engineering Chemistry Research, 2001In the Bayer process, used for the production of alumina from the bauxite ores, there are frequent disturbances and a large number of interacting processes which incorporate considerable dead time....
openaire +1 more source
Determining silica solubility in bayer process liquor
JOM, 1998The 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 ...
openaire +1 more source
Innovative Process for Boehmite Precipitation in Bayer Circuit
Journal of Sustainable Metallurgy, 2019JNARDDC 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 +7 more
openaire +1 more source
Sodalite Scale Control in Alumina Bayer Process
CORROSION 2007, 2007Abstract A series of silane-containing polymers with specific characteristics has been developed for complete elimination of sodalite scale in Bayer process. With practical dosages of those reagents effective protection against scale has been demonstrated in an alumina pilot plant and subsequently in several production plants.
H-L. Chen +8 more
openaire +1 more source