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Investigation on the compression behavior of tetrahedral agglomerates

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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.

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Abbreviations

\(A\) :

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 (–)

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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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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Authors and Affiliations

  1. Mechanical Process Engineering, Otto-von-Guericke University Magdeburg, Universitätsplatz 2, 39106 , Magdeburg, Germany

    Peter Müller & Jürgen Tomas

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  1. Peter Müller
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  2. Jürgen Tomas
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Correspondence to Peter Müller.

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Müller, P., Tomas, J. Investigation on the compression behavior of tetrahedral agglomerates. Granular Matter 15, 863–872 (2013). https://doi.org/10.1007/s10035-013-0419-7

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