Powder rheology and compaction behavior of novel micro-granulates for ceramic tiles
| Autor: | G. Cavani, Chiara Zanelli, A. Piancastelli, Michele Dondi, L. Battaglioli, Roberto Soldati, Cesare Melandri, Guia Guarini |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
General Chemical Engineering Hausner ratio Compaction Powder compaction food and beverages 02 engineering and technology 021001 nanoscience & nanotechnology Microstructure Bulk density Dry granulation 020401 chemical engineering Rheology Agglomerate visual_art Hybrid route visual_art.visual_art_medium Powder rheology Ceramic 0204 chemical engineering Composite material 0210 nano-technology Porosity |
| Zdroj: | Powder technology 374 (2020): 111–120. doi:10.1016/j.powtec.2020.07.039 info:cnr-pdr/source/autori:Soldati, R.; Zanelli, C.; Cavani, G.; Battaglioli, L.; Guarini, G.; Melandri, C.; Piancastelli, A.; Dondi, M./titolo:Powder rheology and compaction behavior of novel micro-granulates for ceramic tiles/doi:10.1016%2Fj.powtec.2020.07.039/rivista:Powder technology (Print)/anno:2020/pagina_da:111/pagina_a:120/intervallo_pagine:111–120/volume:374 |
| Popis: | Using spray-dried powders is widely consolidated in ceramic production, especially for porcelain stoneware tiles and slabs. However, a novel micro-granulation process can reduce the consumption of water and energy. It is based on wetting-agglomeration-drying operations that can be managed either as dry (dry-milled powders, micro-granulation) or hybrid route (wet-milled slurry and dry-milled powders, micro-granulation). The goal is to compare these new dry and hybrid micro-granulates with conventional spray-dried and dry-granulated powders by determining: grain size, shape and moisture distribution; static and dynamic angles of repose; poured and tap density, Hausner ratio; mass flow rate; compaction response; microstructure, pore size distribution and yield strength. The new micro-granulates exhibit improved rheological performances, approaching under some manufacturing conditions those of spray-dried powders, particularly in case of the hybrid route. Differences persist in compaction behavior: this is the consequence of distinct microstructure, porosity and stiffness of spray-dried agglomerates and dry/hybrid micro-granules. |
| Databáze: | OpenAIRE |
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