FACTSAGE 6.2 FREE DOWNLOAD

Despite the financial crisis, the steelmaking sector has returned to the high growth rates recorded in the first decade of the 21st century, with demand growing in terms of both quantity and quality. Nevertheless, it was not possible to experimentally determine the viscosity values for the slags and, as such, the SVP was considered adequate to calculate viscosity. As a result, the search for alternatives that ensure less impurities, greater cleanliness, improved process control and better surface quality in finished and semi-finished casting products, reoxidation control and reduced thermal losses. Our specific objectives are to: Chemical Reaction Engineering, 3rd ed. Thus, the general objective of the present study is to validate concepts from the literature regarding the removal of inclusions by slag in industrial practice.

Uploader:	Maudal
Date Added:	3 July 2011
File Size:	64.44 Mb
Operating Systems:	Windows NT/2000/XP/2003/2003/7/8/10 MacOS 10/X
Downloads:	99652
Price:	Free* [*Free Regsitration Required]

Thus, the third step in inclusion removal is the most pronounced for solid inclusions. Despite the financial crisis, the steelmaking sector has returned to the high growth rates recorded in the first decade of the 21st century, with demand growing in terms of both quantity and quality.

Table 2 shows the average factszge for each steel heat as input data, as well as the stable phases that were calculated in the simulations conducted using FactSage 6. Once these adjustments have been made, another batch of samples is collected X2Y2 from the ladle furnace and the ladle then proceeds to vacuum degassing. Samples X1 and Y1 are not suitable because they were taken at the beginning of the process, when both the slag and steel have a less homogeneous composition and have not yet been adjusted.

Fuel, The chemical composition of slag samples was measured by XRF X-ray fluorescence and subsequently submitted to thermodynamic simulations using FactSage 6. To that end, the results of industrial steel and slag samples collected during the different stages of secondary refining were analyzed. Given that dissolution is subject to the action of slag, this study aims to clarify the inclusion absorption capacity of industrial slags and factors that influence slag properties in absorbing inclusions, as well as the impact of each factor on the cleanliness of the steels analyzed.

This is followed by treatment with wires of calcium silicate, aluminum and sulfur according to the specifications of each steel grade. Fqctsage the stoichiometric oxide solids were selected and among the available factsabe, the following were chosen: Studies show that the separation phase for solid inclusions takes place very quickly. One of the functions of secondary refining in steelmaking is to remove non-metallic inclusions produced through deoxidation of the steel bath during the process.

As such, the removal behavior of solid inclusions is subject to control by mass transfer, reaction kinetics and chemical interactions with the slag.

Another solution for describing the variables that govern dissolution considers the dissolution rate, in accordance with the expression proposed by Choi factsahe al. Nevertheless, it was not possible to experimentally determine the viscosity values for the slags and, as such, the SVP was considered adequate to calculate viscosity.

Thus, the general objective of the present study is to validate concepts from the literature regarding the removal of inclusions by slag in industrial practice. It is also important to underscore that the composition of Y3 is very factsxge to that of Y2since there is no significant intervention in the slag between these stages.

Alumina is pertinent because it is the diffusion-controlling species for all the partially solid samples found.

What's New in FactSage

Were the first samples to be considered, the chemical composition values and inclusion numbers would not be representative. This database stores thermodynamic constants for the pure stoichiometric components and the oxide solutions, as well as the parameters experimentally validated for thermodynamic calculation.

Should the final two steps fail to occur, the inclusion will be subject to factsagd into the molten steel bath through entrapment, depending on the flow patterns in the ladle or tundish. Global steel production has seen continued growth.

Effective viscosity of the slags modified by the Roscoe-Einstein equation as a function of viscosity Riboud and the volumetric fraction of solids.

FactSage Download (Free) -

Samples X2Y2 and X3 were selected to factwage inclusion removal as a function of slag. It can be observed that there is no clear trend for the points in Fig. The graph in Fig. Dissolution therefore becomes the controlling step for the removal of solid inclusions and analyzing the factors in play during this phase is essential to elucidate the inclusion absorption capacity of slags. Moreover, X4 already shows the effects of inclusion modification CaO and Al 2 O 3 so that variations in inclusion numbers are not solely the result of afctsage action.

Dependence of inclusion removal efficiency on the average solid fraction of samples X2. On the other hand, the X4 samples were not selected because they correspond to steel already in the tundish, when in contact with another slag. The first collection X1Y1 takes place when the ladle has just reached the ladle furnace, after deoxidizers and fluxes have ffactsage added.

Experimental evaluation and thermodynamic assessment of the LiF–LuF3 phase diagram

As a result, the search for alternatives that ensure less impurities, greater cleanliness, improved process control and better surface quality in finished and semi-finished casting products, reoxidation control and reduced thermal losses.

However, in addition to the stable phases of slags, this study also requires viscosity data. Ironmaking Steelmaking29 Our specific objectives are to: The efficiency of absorption inclusion by the industrial slags was found to be greater in the presence of high thermodynamic driving force between slags and inclusions, low slag effective viscosity and when inclusions were not liquid.