Laboratory of Particulate Materials

Faculty of Mechanical Engineering

Department/Institute: Institute of Chemical and Hydraulic Machines and Equipment
Contact person:         prof. Ing. Marián Peciar, PhD.
Contact:                   +421 2 5296 2454
e-mail:                      marian.peciar@stuba.sk
web page:                 http://www.sjf.stuba.sk/generate_page.php?page_id=3264

Description:

It is the department which is engaged in research of the mechanics of particulate materials and hydro - mechanical processes. The research is aimed to studying and design of processes and equipment for characterization, treatment and processing of powder materials and suspensions.

Department consists of several separate laboratories including the special instrumentation.

Laboratory for characterization of powder materials. Laboratory is equipped with the special devices, allowing the characterization of the following properties of granular materials:

• shape and morphology of the particles
• particle size distribution
• absorption properties of powders
• porosity
• rheology of powders
• compressibility

The instrumentation was purchased through EU projects:

• Competence center for new materials, advanced technologies and energy. ITMS: 26240220073
• University science park STU in Bratislava. ITMS: 26240220084

Laboratory for processing of powders.  It is a laboratory with the instrumentation that is mainly focused on the research of the process and design of technologies for processing of granular materials. The properties of powder materials that have been measured using the instruments for their characterizing are utilized here. On this basis, the research of processes and design of technology for processing powder materials is realized (silos design, briquetting equipment, conveyors, screeners, mixers, mills, extruders, etc.).

The instrumentation allows this research:

• powder grinding (breaker jaws, hammer mill, pin mill, ball mill)
• sieving (vibrating sieve, rotating sieve)
• mixing (homogenizer with a cylindrical chamber and different shapes of blades, cubic chamber with rectilinear movement of the blade)
• roll pressing and briquetting (compactor with the smooth or profiled rolls)
• granulator (low-speed granulator, low-speed granulator with flat matrix and blades)
• extruder for paste extrusion (screw extruder with a bladed rotor of a special design, screw extruder with a rotating head of a special design, radial extruder)
• Jenike shear tester
• ring shear tester

Laboratory of separation processes. It is focused on the research of processes, design of equipment and technology for the separation of the different phases by the physical - mechanical operations.

The instrumentation allows this research:

• hydrocyclone
• aerocyclone
• membrane separation

This working team is oriented towards to:

• applied research of unit operations for a powder processing
• process design of equipment for these operations
• process design of complex technologies
• the design and preparation of drawings for each operation
• project design and preparation of drawings for technology nodes

Projects:

• Competence center for new materials, advanced technologies and energy, ITMS: 26240220073 (08/2011 - 11/2014)

• Creation of a center of excellence for research and development of structural composite materials for engineering, construction and medical applications, ITMS 26240120006,  akronym CEKOMAT I., 2009-2011.

• Building a center of excellence for research and development of structural composite materials – 2nd phase, ITMS 26240120020, akronym CEKOMAT II., 2010-2012.

• University science park STU in Bratislava, ITMS: 26240220084 (03/2013 - 06/2015)

• Basic processes research in the mechanics of particulate materials VEGA 1/0652/13(01/2013 – 12/2016)

Patents:

• Garrecht, Harald [inventor] - Götz, Joachim [vynálezca patentu] - Linsel, Stefan [inventor] - Peciar, Marián [inventor]: Verfahren und Vorrichtung zur Feststoffumhüllung. - , 2008. - Nr.: EP 2 006 062 A2. - Date: 16.06. 2008. - Nr.: DE 10 2007 028 445 A1. - Awarded: 24. 12. 2008.

 

• Garrecht, Harald [inventor] - Geissler, Adam [inventor] - Götz, Joachim [inventor] - Peciar, Marián [inventor]: Verfahren zur Formgebung gleitfähiger Massen durch Druckförderung und Vorrichtun zur Durchführung des Verfahrens. - , 2005. - 8 s. - Nr.: DE 100 24 762 B4 - Awarded: 23.6. 2005.

 

Publications:

• Vavro, Karol - Peciar, Marián: Injektory a ejektory : Teória a systém počítačových programov INJEKTORY na výpočet a návrh injektorov. - Bratislava : Nakladateľstvo STU, 2011. - 55 s. , [3,836 AH] s. : CD ROM. - ISBN 978-80-227-3634-3 https://is.stuba.sk/vv/pub_priloha.pl?id=234793)

 

• Krok, Alexander - Fekete, Roman - Peciar, Marián: Kompaktovanie partikulárneho materiálu. - 1. vyd. - Bratislava : Nakladateľstvo STU, 2012. - 107 s. - ISBN 978-80-227-3836-1

 

• Götz, Joachim - Kreibich, Wolfgang - Peciar, Marián: Extrusion of pastes with a piston extruder for the determination of the local porosity and saturation and displacement profiles by means of NMR imaging. In: Rheologica Acta. - ISSN 0035-4511. - Vol. 41, No. 1-2 (2002), s. 134-143

 

• Fekete, Roman - Peciar, Marián - Hanzel, Marián: Influence of powder material moisture on the angle of wall friction. In: Particle and Particle Systems Characterization. - ISSN 0934-0866. - Vol. 24, No. 4-5 (2007), s. 276-283

 

• Fekete, Roman - Jaššo, Igor - Peciar, Marián - Molnár, Alexander: Influence of rotor on extrusion pressure. In: Powder technology. - ISSN 0032-5910. - Vol. 141 (2004), s. 210-218

 

• Fekete, Roman - Peciar, Marián - Gužela, Štefan: Process of extrusion in the unit of special design. In: Granular Matter. - ISSN 1434-5021. - Vol. 6, No. 2-3 (2004), s. 145-157

 

• Gužela, Štefan - Peciar, Marián - Fekete, Roman: Mixing of particulate materials - experimental input power estimation. In: Strojnícky časopis = Journal of Mechanical engineering. - ISSN 0039-2472. - Roč. 55, č. 6 (2004), s. 329-340

 

• Fekete, Roman - Peciar, Marián - Hanzel, Marián: Influence of moisture of powder material on the external angle of friction. In: CHoPS-05, 2006 : The 5th international conference for conveying and handling of particulate solids. - Sorrento/Italy/, August 27-31, 2006. - Tel Aviv : ORTRA, 2006. – nestr

 

• Fekete, Roman - Peciar, Marián - Gužela, Štefan: Process of the extrusion in the unit of special design. In: The 4th International Conference for Conveying and Handling of Particulate Solids : Proceedings. Vol. 1. - Tel Aviv : ORTRA, 2003. - S. 287-293

 

• Peciar, Marián - Fekete, Roman - Gužela, Štefan - Juriga, Martin: Agglomeration technologies in Slovakian industry. In: 31st Biennial conference : Proceedings. Vol. 31., San Antonio/Texas/, September 29-30, 2009. - b.m. : Institute for Briquetting and Agglomeration, 2009. - [14]

 

• Garrecht, Harald - Peciar, Marián - Linsel, Stefan - Götz, Joachim: Lightweight aggregate concrete with cement-encasing lightweight aggregate - Processability and performance capacity. In: BFT International. Betonwerk und Fertigteil-Technik. Concrete precasting plant and technology. - ISSN 0373-4331. - Vol. 75, No. 2 (2009), s. 114-116

 

• Fekete, Roman - Peciar, Marián - Gužela, Štefan - Peciar, Peter: Influence of the matrix shape on the fine granulation process. In: 2012 AAPS Annual Meeting and Exposition [elektronický zdroj] : Chicago, USA, October 14-18, 2012. - b.m. : American Association of Pharmaceutical Scientists, 2012 (https://www.aaps.org/AMContributedPapers/). - online, AM-12-00677

 

• Fekete, Roman - Peciar, Marián - Gužela, Štefan: Paste moisture variation during the extrusion. In: The AAPS Journal [online]. - ISSN 1550-7416. - Vol. 11, No. S2 (2009)

 

• Krok, Alexander - Peciar, Marián - Fekete, Roman: Observation of the movement of the material between rolles of the two-rollers compactor by using the high-speed CCD camera. In: PARTEC 2013 [elektronický zdroj] : International congress on Particle Technology. Nürnberg, Germany, 23.-25.4. 2013. - Düsseldorf : VDI, 2013. - ISBN 978-3-00-040578-5. - CD ROM, [1] s.

Photos:

Fig. 1: Roll press for the final processing or briquetting of powder materials.

Fig. 2: Screw extruder for extrusion of paste materials.

Fig. 3: Experimental apparatus for study of a homogenization process.