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| Hoffmann, Thomas. |
| Hammer mills or roller mills are used to grind grain for feed for animal husbandry. The grinding process in hammer mills is based on impact stress on the grain kernels. Roller mills, however, apply pressure and shear stress. The different working principles in hammer mills and roller mills lead to different physical properties of the ground material. The aim of the project was to quantify the physical properties of barley which was ground by a hammer mill or a roller mill. Therefore, the particle size distributions of the ground material were determined by sieving. The particle form was characterized by a form factor. Shear experiments according to Jenike were carried out to determine the flowability. The bulk density was obtained from the quotient of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Flow properties; Particle size; Hammer mill; Roller mill. |
| Ano: 2015 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3449 |
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| Hoffmann, Thomas. |
| Several methods were developed to assess the flowability of bulk material. Jenike introduced flowability values toassess the flowability of bulk material like mineral raw material under given loads. A method developed by Carr usesseveral granulometric parameters to describe the flow properties without influence on the load. The aim of the own studywas to evaluate the recommendations of Jenike and Carr regarding to their application onto crushed grain. Thereforemeasurements with grainy and powdery grain products were carried out to determine flow properties regarding Jenike andCarr. Additionally unloading tests with a level model silo were performed to find out the influence of the outlet diameter.The evaluations of the flow properties according to Jenike... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crushed grain; Flow properties; Jenike shear cell; Carr index. |
| Ano: 2015 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3448 |
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