Modeling of binary molten-salt phase diagrams via neural networks

1995 ◽  
Vol 16 (6) ◽  
pp. 493-500 ◽  
Author(s):  
S. Dai ◽  
B. G. Sumpter ◽  
D. W. Noid
Keyword(s):  
Neural Networks ◽  
Molten Salt ◽  
Phase Diagrams ◽  
Salt Phase

Computation of Ternary Molten Salt Phase Diagrams

1979 ◽  
Vol 62 (7-8) ◽  
pp. 414-422 ◽  
Author(s):  
P.-L. LIN ◽  
A. D. PELTON ◽  
C. W. BALE
Keyword(s):  
Molten Salt ◽  
Phase Diagrams ◽  
Salt Phase

Regularity and Prediction of Molten Salt Phase Diagrams of Monovalent and Quadrivalent Metal Halide Binary Systems

1996 ◽  
Vol 12 (01) ◽  
pp. 67-70
Author(s):  
Wang Xue-Ye ◽  
◽  
Kang De-Shan ◽  
Li Chong-He ◽  
Qin Pei ◽  
...  
Keyword(s):  
Molten Salt ◽  
Phase Diagrams ◽  
Binary Systems ◽  
Metal Halide ◽  
Salt Phase

Calculation of phase diagrams and thermodynamic properties of 14 additive and reciprocal ternary systems containing Li2CO3, Na2CO3, K2CO3, Li2SO4, Na2SO4, K2SO4, LiOH, NaOH, and KOH

1984 ◽  
Vol 62 (3) ◽  
pp. 457-474 ◽  
Author(s):  
A. D. Pelton ◽  
C. W. Bale ◽  
P. L. Lin
Keyword(s):  
Phase Diagram ◽  
Thermodynamic Properties ◽  
Molten Salt ◽  
Phase Diagrams ◽  
Binary Systems ◽  
Ternary Phase ◽  
Ternary Phase Diagram ◽  
Ternary Systems ◽  
Maximum Error ◽  
Critical Assessment

Phase diagrams and thermodynamic properties of five additive molten salt ternary systems and nine reciprocal molten salt ternary systems containing the ions Li+, Na+, [Formula: see text], OH− are calculated from the thermodynamic properties of their binary subsystems which were obtained previously by a critical assessment of the thermodynamic data and the phase diagrams in these binary systems. Thermodynamic properties of ternary liquid phases are estimated from the binary properties by means of the Conformal Ionic Solution Theory. The ternary phase diagrams are then calculated from these thermodynamic properties by means of computer programs designed for the purpose. It is found that a ternary phase diagram can generally be calculated in this way with a maximum error about twice that of the maximum error in the binary phase diagrams upon which the calculations are based. If, in addition, some reliable ternary phase diagram measurements are available, these can be used to obtain small ternary correction terms. In this way, ternary phase diagram measurements can be smoothed and the isotherms drawn in a thermodynamically correct way. The thermodynamic approach permits experimental data to be critically assessed in the light of thermodynamic principles and accepted solution models. A critical assessment of error limits on all the calculated ternary diagrams is made, and suggestions as to which composition regions merit further experimental study are given.

Dynamical phase diagrams of neural networks with asymmetric couplings

1997 ◽  
Vol 55 (6) ◽  
pp. 7344-7353
Author(s):  
M. N. Tamashiro ◽  
O. Kinouchi ◽  
S. R. Salinas
Keyword(s):  
Neural Networks ◽  
Phase Diagrams ◽  
Dynamical Phase

scholarly journals Formation of Chromium-Containing Molten Salt Phase during Roasting of Chromite Ore with Sodium and Potassium Hydroxides

2016 ◽  
Vol 16 (4) ◽  
pp. 215-225 ◽  
Author(s):  
Lidia Escudero-Castejon ◽  
Sergio Sanchez-Segado ◽  
Stephen Parirenyatwa ◽  
Animesh Jha
Keyword(s):  
Molten Salt ◽  
Extraction Yield ◽  
Water Soluble ◽  
Sodium Chromate ◽  
Water Leaching ◽  
Chromite Ore ◽  
Wide Range ◽  
Salt Phase ◽  
Sodium And Potassium ◽  
Equilibrium Calculations

AbstractChromium has a wide range of applications including metals and alloys manufacturing, pigments, corrosion resistance coatings and leather tanning. The production of chromium chemicals is based on the oxidative alkali roasting of chromite ores, which leads to the formation of water-soluble alkali chromates. Previous investigations reported that when chromite is roasted with soda-ash, a molten salt containing chromium, which is mainly composed of sodium carbonate and sodium chromate (Na2CO3-Na2CrO4 binary mixture), forms under typical roasting conditions. The physical properties of the liquid phase, which are dependent on the temperature, charge and gangue compositions, play an important role on the oxidation reaction and may limit the chromate recovery by hindering the oxygen transport to the reaction interface. This investigation focuses on the alkali roasting of chromite ore at 1,000 oC using NaOH and KOH, followed by water leaching. The influence of the alkali ratio on the chromium extraction yield is analysed, and the results obtained with both hydroxides are compared. Sample characterisation and thermodynamic analysis, including phase diagrams, equilibrium calculations and computation of liquidus curves, are combined with the purpose of studying the formation of the molten salt phase under different roasting conditions and its effect on the final chromium recovery.

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