Granulation of mineral fertilisers

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Granulation of mineral fertilisers

1 Bedarf an Pfanzennährstoffen [2] # The need for plant nutrients [2]

2 Fließbild der Granulierung mineralischer Düngemittel # Flow sheet for granulation of mineral fertilisers

3 Rohmateriallager / Materialvorbereitung # Feed-material storage / material preparation

4 Granuliertrommel # Granulation drum

5 Granulierteller HAVER SCARABAEUS SC4200 während der Inbetriebnahme • HAVER SCARABAEUS SC4200 disc granulator during the commissioning

6 Schematische Darstellung eines Granuliertellers mit Klassiereffekt der Agglomerate [8] # Schematic view of a pan granulator incorporating a classifying effect on the agglomerates [8]

7 Schematische Darstellung einer Granuliertrommel – ohne Klassiereffekt # Schematic view of a granulation drum – with no classifying effect

8 Vergleich der Korngrößenverteilungen (jeweils nach Klassierung) # Comparison of particle-size distributions (after classifying in each case)

9 Definition des Äquivalentdurchmessers (oben) und der Zirkularität (unten) # Definition of equivalent diameter (top) and circularity (bottom)

10 Darstellung der Zirkularität der Granulate aus Granulierteller und -trommel (jeweils nach Klassierung) # Circularity of granulates from the pan granulator and from the granulation drum (after classifying in each case)

Aufgabematerial (links) und Düngemittelgranulat (rechts) # Feed material (left) and fertiliser granulate (right)

Summary: HAVER ENGINEERING GmbH (HEM) is an independent engineering consultancy, and is also part of the international HAVER & BOECKER group. HEM is, in addition, an Associated Institute of TU Bergakademie Freiberg. The company’s core capabilities are in the development of customised solutions and machinery for agglomeration and cleaning. Feasibility studies are an important part of the company’s portfolio, as well as plant and system audits and staff training activities. This article examines an example in order to discuss new approaches to the granulation of mineral fertilisers.

The “Law of the Minimum” was formulated by the agronomist Carl Sprengel and the chemist Justus von Liebig as long ago as the mid-19th century. The discovery that the yield of a plant is determined by that nutrient of which the smallest amount is available is an important basis for the use of fertilisers. The term “use of fertilisers” signifies here the addition of substances to the soil and/or to the crop plant, with the aim of promoting plant growth and crop quality, which can be equated with increasing yield.

Since nutrients are removed “from the farmstead” with the harvested crop, they must...

Dipl.-Ing. Jan Lampke
HAVER ENGINEERING GmbH
Meißen/Germany
www.haverengineering.de

M.Sc. Cornelia Messerschmidt
TU Bergakademie Freiberg, Institut für Aufbereitungsmaschinen
Freiberg/Germany
www.tu-freiberg.de/fakult4/iam

Dr.-Ing. Thomas Folgner, Beratungsingenieur
Freiberg/Germany
HAVER ENGINEERING GmbH
Prof. Dr.-Ing. Holger Lieberwirth, Institutsdirektor
TU Bergakademie Freiberg, Institut für Aufbereitungsmaschinen
Freiberg/Deutschland