VSB – Technical University of Ostrava

Selected parts of LSH research 17. Listopadu 15, Ostrava – Poruba, 708 33,Tel:+420597324379

IČO: 61989100, DIČ: CZ61989100

Prof. Jiri Zegzulka, Dr. Jan Necas

Lucie Jezerska, Jan Vyletelek, Jiri Rozbroj

Daniel Gelnar, Martin Žídek et al

Content:

1. Basic equipment of LSH - introduction

2. DEM Simulations and practical applications

3. Another research

19th International Conference, Energy and Environment 2015

LABORATORY OF BULK MATERIALS

Measuring of mechanical-physical properties

Powders are used to produce many of products. The

first part is focused on the following questions:

1. What aspects of powder behavior are interesting

from an industrial perspective? For various

industries.

2. Why do powders flow, or stop flowing? What is

their flowability?

3. What parameters affect how powders behave in a

process, during transport or as a product?

POWDERS

This universal powder tester combines the Freeman patented technology for

measuring of flow energy with a range of shear cells, wall friction modules and other

accessories for measuring of bulk properties. The methodology allows measurement

of:

• Flow energy in relation to many variables and all packing states.

• Shear properties of consolidated and unconsolidated powders.

• Bulk properties – precision bulk density, compressibility and permeability.

• Process variables such as moisture, attrition and segregation.

FT4 POWDER RHEOMETER SYSTEM

LABORATORY OF BULK MATERIALS

Powder rheometer FT4

www.freemantech.co.uk

Flowability, angle of internal friction

PARTICLE SIZE ANALYZER CILAS - 1190

• Particle size distributions

(cumulative and distribution

curve, median, mode, etc.)

• Measuring the number of

particles

• Particle Shape analysis

• Statistical assessment

• Ultrasonic treatment

LABORATORY OF BULK MATERIALS

The particle-size-analyzer sets with its integrated

wet and dry dispersion modes, CCD camera and

short optical path make it the most versatile

instrument available anywhere. The unique design

of the Cilas 1190 provides a measurement range

from 0.04 to 2,500 µm while maintaining an

extremely small footprint.

Particle size analyzer Cilas 1190

The particles are measured by capturing the diffraction

pattern and applying Fraunhofer or Mie theory.

www.cilas.com

Rotating nosepiece

MEASUREMENTS RESULTS

ROTATIONAL RHEOMETER KINEXUS

Shear cell Rotational rheometer Kinexus

LABORATORY OF BULK MATERIALS

A rheometer is a laboratory device used to measure the way in which a liquid,

suspension or slurry flows in response to applied forces. Kinexus enables to

precisely analyze the rheology, or flow and deformation properties of materials:

• From liquids to solids.

• From processability to product performance.

• From temperature to time dependence.

• From simple viscosity to complex viscoelastic parameters.

www.malvern.com/kinexus

User interaface

Dependence of viscosity on temperature

HIGH SPEED CAMERA LAVISION

High speed camera Lavision

LABORATORY OF BULK MATERIALS

The camera is equipped with PIV (Particle Image Velocimetry) technique. It is

a non-destructive laser optical measurement technique for research and diagnostics

into flow, turbulence, microfluidics, spray atomization and combustion processes.

www.lavision.de/en/index.php

MEASUREMENTS RESULTS

• Whole velocity fields.

• Distance individual

particles travelled within

time.

• Set of images.

• Visualizations of particle

motion.

• Video sequences.

• Analysis of bitmaps.

Data processing

Flow of the powder mixture

DEM SIMULATIONS

Discharge of bulk materials

LABORATORY OF BULK MATERIALS

The Discrete Element Method is used for simulation of transportation, procedural

and storage processes in the field of renewable resources, metallurgical industries,

energy, pharmaceutical industries etc.

• Models of particles movement, dynamic

properties with regard to the transport system

response.

• Optimization models of particles shapes and

surfaces and equipment.

• Modeling of friction, friction control bulk

materials transfer in limited space with shape

optimization.

Outputs:

Simulation of particles movement

in the redler conveyor

DEM SIMULATIONS

Real model of screw conveyor

LABORATORY OF BULK MATERIALS

The First example of application:

Simulation model of screw conveyor

DEM SIMULATIONS

Simulation of the cooling process in the vertical screw conveyor.

This screw conveyor is used in industry for cooling of cement materials.

Simulation was used for functionality test of device with regards to materials transportation – Filing and discharging

process.

LABORATORY OF BULK MATERIALS

The first example of application:

DEM SIMULATIONS

LABORATORY OF BULK MATERIALS

The second example of application:

Simulation of material movement in a horizontal screw conveyor.

Will transport capacity be sufficient for the proposed screw speed?

DEM SIMULATIONS

LABORATORY OF BULK MATERIALS

The third example of application:

Redler feeder

The endless

migratory member

with carrier

Reversing

station

Tensioning

device

Measuring trough

The upper branch

Driving station

The drive unit The lower branch

Virtual 3D model

Real laboratory model of redler conveyor

DEM SIMULATIONS

LABORATORY OF BULK MATERIALS

The third example of application:

Geometry 1 Geometry 2

• DEM application detects

changes in velocity vectors

and particle movement using

two different geometry

carriers.

• Effect of carrier shape.

Contact surface of particles in a continuous flow of spherical shape materials with two different geometry carriers.

DEM SIMULATIONS

LABORATORY OF BULK MATERIALS

The fourth example of application – bucket elevator:

Particles movement in the validation bucket elevator.

This transport speed is too quick for evaluation.

• It is possible to

evaluate the

movement of

individual

particles and

understand the

ongoing action.

DEM SIMULATIONS

LABORATORY OF BULK MATERIALS

The fourth example of application – using high-speed camera:

DEM SIMULATIONS

LABORATORY OF BULK MATERIALS

The fourth example of application – evaluation with the PIV method:

ANOTHER RESEARCH

LABORATORY OF BULK MATERIALS

- Mechanical material properties effect on pelletization

The relation between the mechanical physical properties

of raw input materials and pelletization process. The QbD

methodology was used for this purpose.

- Characterization of metal powders

Metal powder were characterized with size, shape

and distribution of particles, flowabillity, aeration

and compression. For surface topography of

samples (Cu, Al, Fe) EDF Z profile was used.

Microscopic photos and 3D surface plot images of Cu sample

Spruce sawdust

Crushed compost

ANOTHER RESEARCH

LABORATORY OF BULK MATERIALS

- R&D parts of agricultural machinery, 110 TA04021078

Modeling of soil behavior and application of results in view of agricultural

machines.

Innovation solution for geometry of cultivators, plows and

another tools for working with soil.

- Possibilities to improve the mechanical and physical properties of slag

for its secondary utilization

Investigation the possibility of upgrade

of the technological line at the company Calumite.

Agricultural soil sample

Blast furnace slag from various suppliers. 1 - ArcelorMittal Ostrava a.s., 2 - Calumite® Ostrava,

3 - Ukraine (Krivoy Rog), 4 - India (Maharashtra)

1 2 3 4

VSB – Technical University of Ostrava

LABORATORY OF BULK MATERIALS 17. Listopadu 15, Ostrava – Poruba, 708 33,Tel:+420596991283

IČO: 61989100, DIČ: CZ61989100

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