Jozef Vlček
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View article: Valorization of Steelmaking Slag for Circular Economy Applications: Adsorptive Removal and Recovery of Ni(II) and Cu(II) from Aqueous Systems
Valorization of Steelmaking Slag for Circular Economy Applications: Adsorptive Removal and Recovery of Ni(II) and Cu(II) from Aqueous Systems Open
The transition toward a circular economy requires innovative strategies for valorizing industrial by-products. This study investigates the potential of steelmaking furnace slag (SFS) as a low-cost adsorbent for the removal and recovery of …
View article: Use of ladle furnace slag as filler replacement in magnesium oxychloride cement: Towards sustainable 3D-printable building composites
Use of ladle furnace slag as filler replacement in magnesium oxychloride cement: Towards sustainable 3D-printable building composites Open
In response to the global demand for CO2 emissions reduction, Portland cement (PC) replacement with more eco-friendly materials has been focused on in material studies. One of the studied alternatives is magnesium oxychloride cement (MOC),…
View article: Utilization of Magnetic Fraction Isolated from Steel Furnace Slag as a Mild Abrasive in Formulation of Cu-Free Friction Composites
Utilization of Magnetic Fraction Isolated from Steel Furnace Slag as a Mild Abrasive in Formulation of Cu-Free Friction Composites Open
Magnetic fraction isolated from steel furnace slag was tested as a component of Cu-free friction composites. The friction–wear performance and production of wear particles during their testing using a pin-on-disc tester against a cast iron…
View article: Characterization of hybrid silicate materials based on ceramic glazes and waste London underground dust
Characterization of hybrid silicate materials based on ceramic glazes and waste London underground dust Open
View article: The Corrosion Effect of Fly Ash from Biomass Combustion on Andalusite Refractory Materials
The Corrosion Effect of Fly Ash from Biomass Combustion on Andalusite Refractory Materials Open
The main problem affecting the life of refractory linings in furnaces is alkaline corrosion formed during biomass combustion, especially in systems with SiO2–Al2O3. This corrosion effect is very intensive compared to using conventional tec…
View article: Design of protection of contactless identification system for ladles
Design of protection of contactless identification system for ladles Open
To eliminate manual inputs that negatively affect the monitoring system of casting ladles, the method of contactless identification of ladles was proposed in Liberty Ostrava a.s. It is an RFID method based on the principle of radio data tr…
View article: Use of Neural Networks for Lifetime Analysis of Teeming Ladles
Use of Neural Networks for Lifetime Analysis of Teeming Ladles Open
When describing the behaviour and modelling of real systems, which are characterized by considerable complexity, great difficulty, and often the impossibility of their formal mathematical description, and whose operational monitoring and m…
View article: Alkali-Activated Metakaolins: Mineral Chemistry and Quantitative Mineral Composition
Alkali-Activated Metakaolins: Mineral Chemistry and Quantitative Mineral Composition Open
The reaction products resulting from the alkali-activation of metakaolin are impacted by the composition of the initial kaolin, and amount of alkali-activated kaolinite and water. The present study focused on analyzing these parameters on …
View article: Utilization of Metallurgical Slags in Cu-free Friction Material Formulations
Utilization of Metallurgical Slags in Cu-free Friction Material Formulations Open
The aim of our research was to indicate the suitability of metallurgical slags (two blast furnace slags and one steel furnace slag) as the components of Cu-free friction materials. The base mixture consisted of nine components including ph…
View article: Corrosive Effect of Wood Ash Produced by Biomass Combustion on Refractory Materials in a Binary Al–Si System
Corrosive Effect of Wood Ash Produced by Biomass Combustion on Refractory Materials in a Binary Al–Si System Open
In terms of its chemical composition, biomass is a very complex type of fuel. Its combustion leads to the formation of materials such as alkaline ash and gases, and there is evidence of the corrosive effect this process has on refractory l…
View article: Use of Numerical Methods for the Design of Thermal Protection of an RFID-Based Contactless Identification System of Ladles
Use of Numerical Methods for the Design of Thermal Protection of an RFID-Based Contactless Identification System of Ladles Open
A method of contactless identification is proposed for steel ladles to eliminate manual inputs that negatively affect the monitoring system of ladles. It is an RFID (Radio Frequency Identification) method based on the principle of radio da…
View article: Corrosion Resistance of MgO and Cr2O3-Based Refractory Raw Materials to PbO-Rich Cu Slag Determined by Hot-Stage Microscopy and Pellet Corrosion Test
Corrosion Resistance of MgO and Cr2O3-Based Refractory Raw Materials to PbO-Rich Cu Slag Determined by Hot-Stage Microscopy and Pellet Corrosion Test Open
Chemical resistance of commercial refractory raw materials against Cu slag is critical to consider them as candidates for the production of refractories used in Cu metallurgy. In this study, we show the comparative results for the corrosio…
View article: Wet magnetic separation OF iron from FINE-GRAINED steelmaking slags
Wet magnetic separation OF iron from FINE-GRAINED steelmaking slags Open
Large volumes of slags are formed as by-products during the refinement of pig iron and steel manufacturing.Generally, the steel slag (steel furnace and ladle furnace slags) contains an appreciable amount of magnetic substances such as meta…
View article: Metakaolin-Based Geopolymers: Influence of Metakaolins on Quantitative Phase Composition and Mechanical Properties
Metakaolin-Based Geopolymers: Influence of Metakaolins on Quantitative Phase Composition and Mechanical Properties Open
View article: Cement Substitution in High-Temperature Concrete
Cement Substitution in High-Temperature Concrete Open
An alternative binder to calcium aluminate cement (CAC) was prepared by the sol-gel method. Chemically pure systems such as tetraethylorthosilicate (SiC8H20O4) and nonahydrate of alumina nitrate (Al(NO3)3·9H2O) were used as major raw mater…
View article: Effects of Kaolin Additives in Fly Ash on Sintering and Properties of Mullite Ceramics
Effects of Kaolin Additives in Fly Ash on Sintering and Properties of Mullite Ceramics Open
The effective utilization of fly ash (FA) as a raw material for ceramics production is performed on the FA-kaolin mixtures containing kaolins 10% by mass. The mixtures in comparison with FA and three raw kaolins were annealed to mullite ce…
View article: Characterization of Waste Sludge Pigment from Production of ZnCl2
Characterization of Waste Sludge Pigment from Production of ZnCl2 Open
This study is focused on the treatment of waste sludge from a zinc chloride production in order to prepare iron-rich pigments usable for a production of glazes. In galvanizing plants, yellow waste sludge containing significant amount of Zn…
View article: Alkali-Activated Metakaolin and Fly Ash as Unfired Ceramic Bonding Systems
Alkali-Activated Metakaolin and Fly Ash as Unfired Ceramic Bonding Systems Open
Metakaolin (MK) prepared by the calcination of kaolin at 550 °C and fly ash (FA) from the combustion of black coal in a granulating boiler were used to prepare unfired ceramic bonding systems via the alkali activation process. A long-term …
View article: SIMULATION OF SELECTED PARAMETERS IN CONTINUOUS STEEL CASTING
SIMULATION OF SELECTED PARAMETERS IN CONTINUOUS STEEL CASTING Open
The presented paper focuses on numerical modelling of temperature fields of a continuously cast billet.The ProCAST software system, which is based on the finite element method, was used as a simulation tool.The finite element method (FEM) …
View article: Separation of the magnetic fraction from the slags originated during steel production
Separation of the magnetic fraction from the slags originated during steel production Open
Metallurgical slags originating during pig iron and steel manufacturing, are valuable sources of the inorganic materials.The limitation of their recycling is usually connected to the expensive methods of the separation of the components.Th…
View article: bonding ability of ladle slags
bonding ability of ladle slags Open
Both Energetic and Metallurgy industry produce large amount of fine grain waste products.Thanks to their properties and composition these waste substances can be recycled back in their original production, where they become from.A typical …
View article: Airborne Wear Particle Emissions Produced during the Dyno Bench Tests with a Slag Containing Semi-Metallic Brake Pads
Airborne Wear Particle Emissions Produced during the Dyno Bench Tests with a Slag Containing Semi-Metallic Brake Pads Open
The aim of the present paper is to investigate the level of airborne wear particles released during the dyno-bench tests with the brake pads consisting of alkali-activated slag as an abrasive. Airborne wear particles are generated with a f…
View article: The Effect of Temperature and Milling Process on Steel Scale Utilized as a Pigment for Ceramic Glaze
The Effect of Temperature and Milling Process on Steel Scale Utilized as a Pigment for Ceramic Glaze Open
This study is focused on the evaluation of the re-utilizability of scale originated during the steel casting and steel rolling processes as a pigment for glazes. Non-oiled scale with Fe3O4 as the major phase were used as a coloring compone…
View article: Modification of the hydration processes of alkali activated blast furnace slag
Modification of the hydration processes of alkali activated blast furnace slag Open
Granulated blast furnace slag exhibits latent hydraulic properties and its binding properties can be evoked by the addition of the alkali activator.Subsequent hydration processes during the setting and hardening processes let to originatio…
View article: EVALUATION OF THE USABILITY OF THE ALKALI ACTIVATED INDUSTRIAL WASTES AS A MATRIX AND SUPPORT OF PHOTOCATALYSTS
EVALUATION OF THE USABILITY OF THE ALKALI ACTIVATED INDUSTRIAL WASTES AS A MATRIX AND SUPPORT OF PHOTOCATALYSTS Open
The aim of this study was to evaluate the possibility of the metallurgical wastes (slags and fly ash) utilization as a support for photocatalyticaly active composites.Metallurgical slags (MS) represent large volume group of by-products ori…
View article: EXPERIMENTAL STUDIES OF GRANULATED BLAST FURNACE SLAG
EXPERIMENTAL STUDIES OF GRANULATED BLAST FURNACE SLAG Open
Blast furnace slag is generated as a by-product of the metallurgical industry and can be called "multifunctional waste".It can be used in the building industry, reused in production or landfilled.Recovery of waste brings both economical an…
View article: Effective Ecological and Cheap Heating of Dwelling Spaces
Effective Ecological and Cheap Heating of Dwelling Spaces Open
The sustainability of human civilization depends largely on green energy management. This work represents one way to achieve this goal. The work is devoted to converting microwave radiation to heat. The article analyses different ways of h…
View article: Reduction of unwanted zinc content in metallurgical wastes and design of rotary kiln
Reduction of unwanted zinc content in metallurgical wastes and design of rotary kiln Open
View article: Refractory materials for biomass combustion
Refractory materials for biomass combustion Open
Thermal processing of biomass, which belongs to renewable resources, is one option to reduce CO2 production and replace the classical combustion of fossil fuels. In comparison to coal, which ensures a stable combustion process, biomass has…
View article: Utilization of ceramic materials in the process of electromagnetic wave conversion to heat usable for space heating of residential facilities
Utilization of ceramic materials in the process of electromagnetic wave conversion to heat usable for space heating of residential facilities Open
The work is dedicated to converting microwave radiation to heat. The article analyses different ways of heating residential and utility areas. Attention is paid mainly to infrared heating. Ceramic materials suitable for converting microwav…