Liquidus temperature effect

The electrolysis temperature affects the electrolyte conductivity, the overpotential, and the solubility of the electrodeposit in aqueous as well as in molten salt systems. The effect of temperature is particularly important in the latter case. The lower limit of the temperature of operation is set by the liquidus temperature of the bath and the solubility of the solute. Generally, the temperature chosen is at least 50 °C above the melting temperature of... 

To test the effect of using a solution model in the calculation of 0,j the simple-solution model was used in conjunction with either method I or method III to fit sets of data consisting of the liquidus temperature alone (146), liquidus temperature and enthalpy of mixing (147), liquidus temperature and activity (147), and all three types of data combined. With the parameters determined from the fit, values of 0 as a function of temperature were calculated and compared with the recommended value. 

The effects of the minor components on the quantity of liquid have, however, not been thoroughly studied. Swayze s results (SIO) indicate that the MgO depresses liquidus temperatures by about 50°C and increases the Al203/Fe203 ratio in the liquid at the C3S-C2S-C3A-C4AF eutectic to 1.63. Alkalis and sulphate may depress the liquidus temperatures further, but the effects of liquid immiscibility must be considered. 

FIG. 38. The effect of AI2O3 on the liquidus temperature of soda—lime— silica glass (Morey, 1930). 

Sometimes unravelling the separate effects of temperature and composition can be difficult, especially where the liquidus temperature of a melt is a function of composition. Such is the problem with Ni partitioning between olivine and a basaltic melt. Two experimental studies, published at the same time, seem to show conflicting results. Leeman and Lindstrom (1978) showed that the prime control on the olivine partition coefficient for Ni in a natural basaltic melt was temperature whilst Hart and Davis (1978) showed that there is clear inverse correlation between the melt composition and partition coefficient. To resolve the apparent conflict... 

Kim] Kim, H.P., Hwang, S.S., Lim, Y.S., Kuk, I.H., Kim, J.S., Effect of Heat Treatment and Chemical Composition on Caustic Stress Corrosion Craeking of Alloy 600 and Alloy 690 , Key Eng. Mater., 183-187, 707-712 (2000) (Electrochemistry, Interface Phenomena, 10) [2000Mie] Miettinen, J., Howe, A.A., Estimation of Liquidus Temperatures for Steels Using Thermo-... 

An attempt to consider the effect of small amounts of carbon on the C-Cu-Fe liquid phase using the thermodynamic analysis was made in [1976Wag]. When the dependence of liquidus temperature on concentration is small it indicates considerable positive deviations from ideal solution in case of the C-Cu-Fe system somewhat larger amounts of carbon result in the formation of two liquid phases. 

Of the compositional modifiers, B2O3 is unique. As a flux, it reduces the liquidus temperature of a melt and the fiber forming temperature, while not materially affecting the mechanical properties of the fiber. Addition of fluorine (CaF2) has a similar effect. 

The objective of this research is to study the effect of the iron carbon nuggets carburization and coalescence on reduction process in an experimental rotary kiln. For this purpose, it was developed four self-reducing mixtures with different slag liquidus temperature as it is shown in table IV. 

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