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„Research Topics of the Chair MPE“ Mechanical Process Engineering - Prof. Dr.-Ing. habil. Jürgen Tomas
Slide 1/14 Survey 6/2011 Magdeburg
Prolog: From „Macro to Micro“ by Comminution
DEM simu-lation of impact crusher
Rotor tip speed
vU = 25 m/s
Jeschke, H., Poppy, W. und W. Schubert, Betonzerkleinerung im Prallbrecher - Experiment und Simulation, Aufbereitungs-Technik 47 (2006)6, 4-21
„Research Topics of the Chair MPE“ Mechanical Process Engineering - Prof. Dr.-Ing. habil. Jürgen Tomas
Slide 2/14 Survey 6/2011 Magdeburg
Combination of Apparatus and Plant Technology with Modern Material Sciences (Physics, Biology, Chemistry) + Mathematical Methods of Mechanics and Process Systems
Particle Technology Process Engineering of Complex Material Circuits
1. Energetically Efficient Processing of Ultrafine to Nanoscaled Particle Systems
• Physical product properties, particle processing, product design, formulation, particle mechanics and powder handling
• Physical fundamentals, microprocesses & process design of comminution, precipita-tion, particle separation (sorting, classifica-tion), press filtration
• Functional (process) design of apparatuses, machines & combinations in process groups
2. Environmental Protection and Recycling Technologies
• Solid waste processing (liberation and separation of valuables)
• Waste water treatment (suspension dewatering & sewage sludge reuse)
• Building material recycling • Material recycling processes, product
design and formulation
„Research Topics of the Chair MPE“ Mechanical Process Engineering - Prof. Dr.-Ing. habil. Jürgen Tomas
Slide 3/14 Survey 6/2011 Magdeburg
Staff of Mechanical Process Engineering
Nicolle Degen Secretary
Prof. Dr.-Ing. habil. Jürgen Tomas
Head
Dr.-Ing. Andreas Schlinkert
Lab engineer
Dipl.-Ing. Bernd Ebenau
Consultant
Dipl.-Ing. Sebastian Kleinschmidt
Scientific co-worker
Micro - Macroprocesses Process Engineering of Material Circuits
Dr. rer. nat. Werner Hintz
Scientific co-worker
Dipl.-Ing. Katja Mader
Scientific co-worker
Dr. rer. nat. Sergej Aman
Scientific co-worker
Dipl.-Ing. Hendrik Mainka
Scientific co-worker
Nanoparticle Engineering
Dipl.-Ing. Sören Stein
Scientific co-worker
MSc. Salman
Research student
Dr.-Ing. Peter Müller
Scientific co-worker
Dipl.-Ing. Martin Pieper Sci. co-worker
Andrea Tausch Research secretary
Dr. Azamat Omarov Sci. co-worker
MSc. Olakunle Olatunji Research student
Dipl.-Ing. (FH) Antje Keitel
Lab assistant
„Research Topics of the Chair MPE“ Mechanical Process Engineering - Prof. Dr.-Ing. habil. Jürgen Tomas
Slide 4/14 Survey 6/2011 Magdeburg
Particle Technology Process Engineering of Complex Material Circuits
Nanoparticle Engineering
Production of nanoparticles by crystal-lization and precipitation, process dynamics, population balances
Physical characterization of nano-particle systems
Production of ultrafine particles by combination of precipitation and intensive milling
Micromechanics of particle adhesion, powder mechanics, microprocesses of particle adhesion
Micro – Macroprocesses
Improvement of flowability of cohesive powders by nanoscaled flow agents
Vibrations, hopper discharge & flow properties of cohesive ultrafine powders
Radio waves & light emission at contact deformation & particle breakage
Deformation & breakage of granules, crystals & wheat corns at compression & impact stressing
Modelling and DEM simulation of breakage behaviour of particle compounds
Recycling of EAF dust by an innova-tive leach-grinding process*
Cryogenic comminution for liberation of re-growing biological raw materials to reclaim valuables*
Press filtration of saturated, compressed, ultrafine particle packings
Sebastian Kleinschmidt
Sergej Aman
Sören Stein Olakunle Olatunji
Werner Hintz Martin Pieper Hendrik Mainka
Martin Pieper
Bernd Ebenau Andreas Schlinkert
Jürgen Tomas Katja Mader
N.N.
* 2006 - 2010
Multistage aero sorting and recycling of PET bottles, hemp fibres etc.
Combination of Apparatus and Plant Engineering with Actual Material Sciences (Physics, Chemistry, Biology) + Mathematical Methods of Mechanics and System Engineering
Peter Müller
Peter Müller Sergej Aman Azamat Omarov Salman
Antje Keitel
„Research Topics of the Chair MPE“ Mechanical Process Engineering - Prof. Dr.-Ing. habil. Jürgen Tomas
Slide 5/14 Survey 6/2011 Magdeburg
Particle Technology
Process Engineering of Complex Material Circuits
Particle Characterisation: Screening, laser diffrac-tion & scattering instruments, microscope with image processing, BET & Blaine analyser, Zeta-potential instruments, ultrasonic spectrometers; permeability, mercury, water vapour & gas sorp-tion porosimeters; helium, powder pycnometers
Reactors & Comminution Machines: Lab stirred vessel reactors, pneumatic cannon, jaw crushers; hammer, turbo-rotor, ball, impact, cut, friction, roller mills; disintegrator, stirred medium mills, jet mill circuit, photo & mechano-luminescence instruments
Powder Mechanics: Translational, oscillating & ring shear cells, press-shear cell, time consolidation benches with drying & heating ovens, air condi-tioning chamber, moisture testing, fluidized bed tester, tapping density
Sample Preparation: Sample division and mixer (agitator, rotating drum, lab-stir-rer, dispersion agitator)
Mechanical Dewatering: Sedimentation cylinders, centrifuges, ultra-centrifuge, cake filtration apparatus, compression filter cells, press-shear filter, membrane filters with plate and tube modules, filter medium testing apparatus
Particle Separation: Classification machi-nes (vibration screens, centrifugal air classifiers), sorting apparatuses (zigzag air separator, sorting table, lab flotation cell)
Equipment of Mechanical Process Engineering
„Research Topics of the Chair MPE“ Mechanical Process Engineering - Prof. Dr.-Ing. habil. Jürgen Tomas
Slide 6/14 Survey 6/2011 Magdeburg
Particle Technology Process Engineering of Complex Material Circuits
1. Mechanical Process Engineering • Characterisation of physical product properties (granulometry & porosi- metry) • Characterisation of mechanical powder properties and flow behaviour • Design of processes (machines) and process groups (comminution, precipitation, classification, sorting, storage & handling)
2. Environmental Protection Engineering & Recycling
• Sample preparation of solids (liberation, classification, division, separation of valuables, mixing)
• Waste water treatment (suspension & sludge dewatering and reuse)
• Building material recycling • Development of recycling processes
and products
Services of Chair for Mechanical Process Engineering
„Research Topics of the Chair MPE“ Mechanical Process Engineering - Prof. Dr.-Ing. habil. Jürgen Tomas
Slide 7/14 Survey 6/2011 Magdeburg
Lectures to the Combination of Apparatus and Plant Engineering with Modern Material Sciences (Physics & Chemistry) and Mathematical Methods of Mechanics
Particle Technology Process Engineering of Complex Material Circuits 1. Mechanical Process Engineering
• L Mechanical Process Engineering • Lab-Exerc.: Granulometry I, Comminution, Air Classification, Powder Mechanics • L Fundamentals & Processes of Chemical E. • L Particle & Powder Mechanics • L Nanoparticle Syntheses • L Simulation of Mechanical Processes by Simulink & MATLAB • L Discrete Element Method • Lab-Exercises: Granulometry II, Porosimetry, Ultrafine Particle Milling,
2. Environmental Protection Engineering & Recycling
• L Mineral Processing & Material Recycling
• Lab-Exerc.: Multistage Cross Flow Separation, Flotation
• L Mechanical Separation Processes (Waste Water Treatment)
• Lab-Exerc.: Sedimentation, Cake & Press Filtr., Cross Flow Filtration
„Research Topics of the Chair MPE“ Mechanical Process Engineering - Prof. Dr.-Ing. habil. Jürgen Tomas
Slide 8/14 Survey 6/2011 Magdeburg
Block Flow Chart of Particle Processing System 1. Survey Balance boundary of material, energy, information and costs flows
Raw materialsE I E I E I E I E I E I
I E I E I E I I I
E I E I
H E I
E H I
Store (R)
Store (H)
Raw materialprocessing
Materialconversion
Materialseparation
Auxiliarymaterialsupply
Auxiliarymaterialprocessing
Store (W)Recycling process(Reuse)
Raw materials(R)
Auxiliarymaterials (H)
Infor-mation (I)
Energy (E)
Costs (K)
Product A
Product B
Waste
Mainproduct
By-product
Waste
Infor-mation
Energy
Store (A)
Store (B)Store (W)
E I I
E I E I
Productformu-lation
Proceeds
„Research Topics of the Chair MPE“ Mechanical Process Engineering - Prof. Dr.-Ing. habil. Jürgen Tomas
Slide 9/14 Survey 6/2011 Magdeburg
Multiscale Order of Particle Conversion Processes 2. Philosophy
„Research Topics of the Chair MPE“ Mechanical Process Engineering - Prof. Dr.-Ing. habil. Jürgen Tomas
Slide 10/14 Survey 6/2011 Magdeburg
Multiscale Modelling the Dynamics of Particle Packing 2. Philosophy
„Research Topics of the Chair MPE“ Mechanical Process Engineering - Prof. Dr.-Ing. habil. Jürgen Tomas
Slide 11/14 Survey 6/2011 Magdeburg
Adhesion & Microprocesses of Particle Bonds 3. Adhesion
Tomas, J.: Modellierung des Fließverhaltens von Schüttgütern auf der Grundlage der Wechselwirkungskräfte zwischen den Partikeln und Anwendung bei der Auslegung von Bunkeranlagen, (Dissertation B, Habilitation), TU Bergakademie Freiberg 1991
„Research Topics of the Chair MPE“ Mechanical Process Engineering - Prof. Dr.-Ing. habil. Jürgen Tomas
Slide 12/14 Survey 6/2011 Magdeburg
Contact Stressing Modes of Compression, Sliding, Rolling & Spinning for Load Dependent Adhesion
3. Contact Mechanics
„Research Topics of the Chair MPE“ Mechanical Process Engineering - Prof. Dr.-Ing. habil. Jürgen Tomas
Slide 13/14 Survey 6/2011 Magdeburg
National Priority Program 1486 “Particles in Contact - Micro- mechanics, Microprocess Dynamics and Particle Collectives”
5. Summary & Outlook
- Problems, Goals and Interdisciplinary Methods
- Project Groups:
A Physico-chemical Basic Principles within Contact Zone (3 projects)
B Particle-Particle and Particle-Wall Contacts (16 projects)
C Particle Impacts and their Dynamics (1 project)
D Constitutive Material Laws for Particle Collectives on Macro Level (4 projects)
- Subsidies (since 5/2010): 2,37 Mill. €/a www.piko.ovgu.de/
„Research Topics of the Chair MPE“ Mechanical Process Engineering - Prof. Dr.-Ing. habil. Jürgen Tomas
Slide 14/14 Survey 6/2011 Magdeburg
5. Expressing my Thanks for … Discussions, experimental contributions, relevant information and tips of co-workers, e.g. S. Aman, S. Antoniuk, T. Gröger, B. Ebenau, L. Grossmann, T. Günther, A. Haack, W. Hintz, G. Kache, M. Khanal, T. Kollmann, C. Mendel, T. Mladenchev, P. Müller, T. Nikolov, A. Petrova, B. Reichmann, W. Schubert, R. Tykhoniuk, … Intensive collaboration with H. Kalman (BGU Beer Sheba) at GIF project “Particles and
Granules Breakage during Various Loadings: Compression, Impact and Shear ”.
Fruitful collaborations between Mechanics, Physics, Materials and Mathematics with e.g. H. Altenbach, A. Bertram, U. Gabbert, K. Kassner, D. Regener, P. Streitenberger, L. Tobiska, G. Warnecke, M. Zehn, … within DFG-Graduiertenkolleg 828 (graduate school) “Micro-Macro Interactions in Structured
Media and Particle Systems”. The advices from S. Luding (TU Twente) and H.-J. Butt, M. Kappl (MPI Mainz) during the collaboration of the project “Shear Dynamics of Cohesive, Fine-Disperse Particle Systems“ of the joint research program “Behaviour of Granular Media“ of German Research Association (DFG).
„Research Topics of the Chair MPE“ Mechanical Process Engineering - Prof. Dr.-Ing. habil. Jürgen Tomas
Slide 15/14 Survey 6/2011 Magdeburg
Additional Slides … 6. Supplements
„Research Topics of the Chair MPE“ Mechanical Process Engineering - Prof. Dr.-Ing. habil. Jürgen Tomas
Slide 16/14 Survey 6/2011 Magdeburg
af
d
c
be
i
g
h
d – Thermostat e – Gearwheel pump f – Educt feed g – Thermo element h – Temperature registration
i – Sampling
Precipitation of Barium Sulphate Test machine – stirred tank reactor Test Procedure
Promotionskolloquium Petrova, 26.09.2008
a – Agitator
b – Controlled agitator drive
c – Reactor
• BaCl2 + K2SO4 BaSO4 + 2 KCl
• Batch tests
• BaCl2 – solution is fed in reactor first
• K2SO4 – solution is added by pump
• Dispersing agent is added to BaCl2 – solution
• Particle size analysis after precipitation
by dynamic light scattering
→
„Research Topics of the Chair MPE“ Mechanical Process Engineering - Prof. Dr.-Ing. habil. Jürgen Tomas
Slide 17/14 Survey 6/2011 Magdeburg
Milling and Mechanical Disintegration Test machine – Ring gap mill Test procedure
Promotionskolloquium Petrova, 26.09.2008
• Batch tests
• Milling medium – barium sulphate (precipitated and agglomerated)
• Mearurement of milling kinetics by laser diffraction instrument
• Measurement of powder consumption
• Measurement of specific surface area
• Adding dispersing agent to prevent re-agglomeration effects
Stator
Rotor
MahlkörperWelle
Eintritt Kühlflüssigkeit
Austritt
Mahlguteintritt
Mahlgutaustritt
Spaltsieb
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