Modeling Physicochemical Properties of Mold Slag

2014 ◽  
Vol 59 (1) ◽  
pp. 149-155 ◽  
Author(s):  
D. Kalisz
Keyword(s):  
Mathematical Modeling ◽  
Surface Tension ◽  
Computer Simulation ◽  
Physicochemical Properties ◽  
Calcium Fluoride ◽  
Slag Composition ◽  
Structural Model ◽  
Slag Viscosity ◽  
Basic Slag ◽  
Mold Slag

Abstract This paper deals with the mathematical modeling of physicochemical properties of mold slag such as: viscosity, surface tension, temperature liquidus, basicity. Computer simulation of slag viscosity was made by the Nakamoto structural model. The effect of addition CaF2 to the mold slag was estimated by using of Urbain model. The results were compared with the results of the experiment. Surface tension for the basic slag composition: CaO - SiO2 - Al2O3 was calculated with using Nakamoto model. The results of calculations indicate that the content of the SiO2 lowers the surface tension, but increase the content of CaO and Al2O3 in the slag increases its value. Calcium fluoride (CaF2) reduces the viscosity of the slag. The increase in temperature reduces the viscosity of the slag, simultaneously increasing the surface tension.

The Effect of Calcium Fluoride on Slag Viscosity

2011 ◽  
Vol 42 (5) ◽  
pp. 928-931 ◽  
Author(s):  
Liushun Wu ◽  
Jimmy Gran ◽  
Du Sichen
Keyword(s):  
Calcium Fluoride ◽  
Slag Viscosity

scholarly journals Mathematical Modeling And Computer Simulation Of Fire Phenomena

1994 ◽  
Vol 4 ◽  
pp. 185-193 ◽  
Author(s):  
H. Baum ◽  
K. Mcgrattan ◽  
R. Rehm
Keyword(s):  
Mathematical Modeling ◽  
Computer Simulation

scholarly journals Estimation of Various Physicochemical Properties of Walnut Oil from Different Areas of Northern Kpk, Pakistan

2021 ◽  
Vol 65 (4) ◽  
Author(s):  
Yasir Uddin ◽  
Nasir Mehmood Khan ◽  
Farman Ali ◽  
Shujaat Ahamd ◽  
Zia Ullah Khan ◽  
...  
Keyword(s):  
Surface Tension ◽  
Oleic Acid ◽  
Linoleic Acid ◽  
Physicochemical Properties ◽  
Olive Oil ◽  
Food Processing ◽  
Juglans Regia ◽  
Acid Value ◽  
Walnut Oil ◽  
Iodine Values

Abstract. In this study, the physicochemical properties of walnut (Juglans regia L.) oils collected from different sites in Khyber PakhtoonKhwa (KPK), Pakistan were investigated. The obtained walnut oils showed variation in viscosity, surface tension, density, acid, saponification, and iodine values. The oil obtained from the Madyan (Sample E) showed the lowest density (0.981 g/cm3), surface tension (34.76×10-3 N/m), viscosity (15.0595 cp) saponification values 84.15 (mg KOH/g of oil) and acid value 3.5 (mg KOH per gram oil) amongst all. The physicochemical properties of all the oils were also compared to olive oil (standard) where sample E showed similarities in such properties compared to olive oil. Moreover, higher concentrations of oleic acid (41 %) and linoleic acid (9 %) were detected in the walnut oil of sample E in GC/MS analysis. The similarities of walnut oil obtained from Madyan to that of standard (olive oil) thus affirm it as best quality oil and suitable for food processing purposes.      Resumen. En este estudio se investigaron las propiedades fisicoquímicas del aceite de nuez (Juglans regia L.) recolectado de diferentes sitios en Khyber PakhtoonKhwa (KPK), Pakistán. Los aceites de nuez obtenidos mostraron variación en los valores de viscosidad, tensión superficial, densidad, acidez, saponificación e índice de yodo. El aceite obtenido del Madyan (Muestra E) mostró la menor densidad (0.981 g/cm3), tensión superficial (34.76 × 10-3 N/m), viscosidad (15.0595 cp), valores de saponificación 84.15 (mg KOH/g de aceite) y valor ácido 3.5 (mg KOH por gramo de aceite) entre otros. Las propiedades fisicoquímicas de todos los aceites también se compararon con el aceite de oliva (estándar); la muestra E mostró similitudes en las diferentes propiedades en comparación con el aceite de oliva. Además, se determinaron concentraciones más elevadas de ácido oleico (41 %) y ácido linoleico (9 %) en el aceite de nuez de la muestra E mediante el análisis GC/MS. Las similitudes del aceite de nuez obtenido de Madyan con el estándar (aceite de oliva) lo afirman como aceite de mejor calidad y adecuado para el procesamiento de alimentos.

Physicochemical properties of sodium lignosulfonates (NaLS) modified by laccase

Holzforschung ◽  
2012 ◽  
Vol 66 (7) ◽  
pp. 825-832 ◽  
Author(s):  
Haifeng Zhou ◽  
Dongjie Yang ◽  
Xiaolei Wu ◽  
Yonghong Deng ◽  
Xueqing Qiu
Keyword(s):  
Surface Tension ◽  
Physicochemical Properties ◽  
Opposite Effect ◽  
Adsorption Process ◽  
Gel Permeation Chromatography ◽  
Sodium Lignosulfonate ◽  
Substitution Pattern ◽  
Cement Pastes ◽  
Gel Permeation ◽  
Initial Decrease

Abstract The ability of commercial laccase for improvement of the physicochemical properties of sodium lignosulfonate (NaLS) without any mediator has been investigated. Surface tension, adsorption characteristics, rheological behaviors and fluidity of cement pastes were in focus. Gel permeation chromatography (GPC) shows an initial decrease and then an extensive increase of molecular weight (MW) of NaLS after incubation with laccase. Parallel to MW decrement, the content of phenolic groups is increasing, while an MW increment has the opposite effect. The UV-Vis spectra and the zeta potential of NaLS do not indicate further modification of the substitution pattern on the aromatic ring. The surface tension of NaLS and the adsorbed amount of NaLS on MgO particles is elevated after laccase treatment. The electrostatic attraction between MgO particles and NaLS is the main driving force during this adsorption process. The dispersion efficiency of laccase modified NaLS on the MgO slurry and cement paste is improved.

Effect of oxygen and bismuth impurities on the structural and physicochemical properties of nickel melts

2021 ◽  
Vol 1 ◽  
pp. 73-83
Author(s):  
K.S. Filippov ◽  
Keyword(s):  
Surface Tension ◽  
Physicochemical Properties ◽  
Pure Nickel ◽  
The State ◽  
Combined Effect ◽  
Negative Deviation ◽  
Raoult’S Law ◽  
Compression Effect ◽  
Heat Resistant ◽  
Effect Of Oxygen

There are practically no data in the literature on the combined effect of oxygen and bismuth impurities on the structural and physicochemical properties of nickel melts or heat-resistant alloys based on it. In the presented work, the state of pure nickel and nickel melts containing (0.005-0.01) bismuth and oxygen is considered in the process of refining from oxygen and bismuth impurities. The influence of these impurities on the structural and physicochemical properties was studied, which was evaluated by the parameters of the density and surface tension of the melts. In nickel melts with bismuth and oxygen, a compression effect and a negative deviation from Raoult’s law were observed. The effect of an increase in the surface tension of a nickel melt containing oxygen with an increase in the concentration of bismuth is found, which corresponds to the isotherm of desorption of excess substance from the surface into the bulk.

Sign in / Sign up

Export Citation Format

Share Document