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Featured researches published by L. Blacha.


WIT transactions on engineering sciences | 2017

IMPURITIES REMOVAL PROCESS FROM THE VACUUM INDUCTION FURNACE CHARGE: A NUMERICAL STUDY

Piotr Buliński; Jacek Smolka; Slawomir Golak; R. Przyłucki; Michal Palacz; G. Siwiec; Jakub Lipart; L. Blacha

The technology of mental melting in a vacuum induction furnace enables the efficient removal of impurities and provides an opportunity to melt refractory metals, such as titanium. These materials can be applied in cutting edge technologies, such as aviation (turbine blades) and biotechnology (prosthesis and implants). To control metallurgical heat and mass processes within an induction furnace, measurements and a numerical analysis can be conducted. In this paper, numerical approaches are discussed. Simulation requires the development of vacuum induction furnace coupling between fluid dynamics and electromagnetic fields. The proposed numerical domain was modelled as a threedimensional slice with a properly defined periodic boundary condition. To define the analysed electromagnetic problem, a set of Maxwell differential equations was specified. A fluid dynamics sub-model was composed of the mass and momentum conservation equations using the volume of fluid multiphase formulation, two-equation k- turbulence model and species transport to track the inclusion position within the melt. The main purpose of this study was an examination of the impurities removal process via the free surface of the melt within an induction furnace. The coupled computations were performed for five operating conditions, including different power inputs of the inductor. The results indicated a strong influence of the inductor power on the free surface area and therefore on the purification process intensity.


Solid State Phenomena | 2013

Aluminium Evaporation from Titanium Alloys in the VIM Process

B. Oleksiak; L. Blacha; Lubomir Pikna; R. Burdzik

In the paper, results of the study on aluminium evaporation from the Ti-Al alloy (6.5%mass) during smelting in a vacuum induction furnace (VIM) are presented as well as the kinetics of the process is discussed. The experiments were performed at 51000 Pa for 1972 K and 2023 K. Based on the determined values of aluminium overall mass transfer coefficient, the mass transfer coefficient in the liquid phase and the evaporation rate constant, the stages that determined the investigated process were defined. It was demonstrated that Al evaporation from the aluminium-titanium alloy is kinetically controlled.


Metalurgija | 2013

Loss of aluminium during the process of Ti-Al-V alloy smelting in a vacuum induction melting (VIM) furnace

L. Blacha; G. Siwiec; B. Oleksiak


Metalurgija | 2014

The effects of mass transferin the liquid phase on the rate of aluminium evaporation from the Ti-6Al-7Nb alloy

L. Blacha; J. Mizera; P. Folęga


Metalurgija | 2012

Utjecaj parametara indukcijske elektro peći na brzinu masenog prijenosa u tekućoj fazi

R. Przyłucki; S. Golak; B. Oleksiak; L. Blacha


Archives of Metallurgy and Materials | 2013

Effects of pressure on the kinetics of manganese evaporation from the OT4 alloy

L. Blacha; R. Burdzik; A. Smalcerz; T. Matuła


Metalurgija | 2012

Factors determining the rate of the process of metal bath components evaporation

L. Blacha; J. Łabaj


Metalurgija | 2013

Wastes from the coal-enrichment process as alternative reducers for lead smelting from lead-acid accmulator scrap

J. Lipart; T. Matuła; M. Niesler; L. Blacha; J. Filipczyk


Applied Thermal Engineering | 2017

Numerical and experimental investigation of heat transfer process in electromagnetically driven flow within a vacuum induction furnace

Piotr Buliński; Jacek Smolka; Slawomir Golak; R. Przyłucki; Michal Palacz; G. Siwiec; Jakub Lipart; Ryszard A. Białecki; L. Blacha


Archives of Metallurgy and Materials | 2015

Effect of turbulence modelling in numerical analysis of melting process in an induction furnace

Piotr Buliński; Jacek Smolka; Slawomir Golak; R. Przyłucki; L. Blacha; Ryszard A. Białecki; M. Palacz; G. Siwiec

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G. Siwiec

Silesian University of Technology

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Jacek Smolka

Silesian University of Technology

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R. Przyłucki

Silesian University of Technology

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B. Oleksiak

Silesian University of Technology

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Piotr Buliński

Silesian University of Technology

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Slawomir Golak

Silesian University of Technology

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A. Smalcerz

Silesian University of Technology

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Michal Palacz

Silesian University of Technology

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T. Matuła

Silesian University of Technology

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Jakub Lipart

Silesian University of Technology

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