Granular Matter

, Volume 15, Issue 6, pp 863–872 | Cite as

Investigation on the compression behavior of tetrahedral agglomerates

Original Paper
First Online:
Received:

Abstract

Using a lab-scale pelletizing pan defined tetrahedral agglomerates have been produced from macroscopic spherical primary particles by adding a liquid binder. Defined tetrahedral agglomerates consist of four spherical primary particles, three particles forming the base area on which the fourth particle is arranged centrally. The compression and breakage behavior has been experimentally studied by compression tests. The influences of particle size and binder concentration have been investigated. Moreover, a first approach regarding the theoretical description of the contact deformation of tetrahedral agglomerates has been derived.

Keywords

Compression test Material behavior Agglomerate Tetrahedron 

List of symbols

\(A\)

Area (\(\hbox {m}^{2}\))

\(c\)

Concentration (Ma-%)

\(d_{50}\)

Mean diameter (mm)

\(E\)

Modulus of elasticity (Pa)

\(F\)

Force (N)

\(h_{t}\)

Height of a tetrahedron (m)

\(k\)

Stiffness (N/m)

\(p\)

Pressure (Pa)

\(R\)

Radius (m)

\(r\)

Radius (m)

\(S_{m}\)

Specific area (\(\hbox {m}^{2}/\mathrm{kg}\))

\(s\)

Displacement (m)

\(v_{B}\)

Stressing velocity (m/s)

\(\alpha \)

Angle (degree)

\({\beta }\)

Angle (degree)

\(\varepsilon \)

Porosity (–)

\(\nu \)

Poisson’s ratio (–)

\(\rho \)

Density (\(\hbox {kg/m}^{3}\))

\(\sigma \)

Strength, stress (\(\hbox {N/m}^{2}\))

\(\psi \)

Sphericity (–)

Indices

B

Breakage

c

Contact

el

Elastic

F

Yield

g

Granule

low

Lower

m

Mean

max

Maximum

n

Normal direction

up

Up

P

Plate

PP

Primary particle

p

Particle

pl

Plastic

s

Solid

tot

Total

1, 2, 3, 4

Particle, contact partner 1, 2, 3, 4

\(^{*}\)

Effective parameter

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Notes

Acknowledgments

The support of Prof. H. Altenbach of the Institute of Mechanic of the Otto-von-Guericke University Magdeburg is appreciated for a fruitful collaboration and discussion.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  1. 1.Mechanical Process EngineeringOtto-von-Guericke University MagdeburgMagdeburgGermany

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