Authors: Jason Cousins, Martin Roberge, Lope Tabil
Identifier: CSBE21405
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Published in: CSBE-SCGAB Technical Conferences » 5th CIGR and AGM Quebec City 2021 » Regular Sessions

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Description: Many agricultural fertilizers come in the form of bulk granular material. The improvement of equipment for handling, storage, and application of granular fertilizer requires a proper understanding of material properties and flow behavior. The propensity of fertilizers to cake (i.e. agglomerate) introduces additional challenges for storage and handling. While select information can be found in the literature, a full description of material properties for granular fertilizers suitable for design and modeling is not available. Unknown material properties must, therefore, be determined through experimental measurement. A series of laboratory scale experiments were conducted to measure select physical properties for granular urea (46-0-0) fertilizer. These included: gas pycnometer for material density, confined axial compression for elastic modulus, direct shear test, slump test for angle of repose, sieve analysis for particle size distribution, particle image analysis for shape characterization, and particle drop test for particle restitution. Density (1325 kg/m3) and size distribution (diameter, AVG 2.53 mm, STD 0.44 mm) for granular urea were found to be similar to published values from the literature. Novel quantities for urea of elastic modulus (6.32E+07 Pa), angle of internal friction (37?) and cohesion (0.9 kPa), angle of repose (15.6?), and circularity (AVG 1.15, STD 0.05) which are absent in the literature were determined. Coefficients of restitution for several materials, including urea-urea contact, were also measured and consistent with the literature were applicable. The experimental measurements obtained herein add to those available in the literature and contribute to an improved understanding of granular fertilizer flows.

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Date: 2021-06-11
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Conference name: 5th CIGR International Conference and CSBE-SCGAB AGM 2021, Quebec City,QC, 11-14 May 2021.
Session name: Machinery and Robotic Systems 1

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Type: Text.Abstract
Publication type: Presentation
Coverage: Canada
Language 1: en
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Rights: Canadian Society for Bioengineering
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