„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

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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

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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

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Multiscale Modelling the Dynamics of Particle Packing 2. Philosophy

„Research Topics of the Chair MPE“ Mechanical Process Engineering - Prof. Dr.-Ing. habil. Jürgen Tomas

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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

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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

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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

„Research Topics of the Chair MPE“ Mechanical Process Engineering - Prof. Dr.-Ing. habil. Jürgen Tomas

Slide 18/14 Survey 6/2011 Magdeburg

Micromechanics: Mechanical Stressing of Single Agglomerates – Product Quality Assessment

3. Contact Mechanics