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[article]
Titre : |
Wet clay adhesion to antistick coatings : effects of binder type and surface roughness |
Type de document : |
texte imprimé |
Auteurs : |
Andrea Fasano, Auteur ; Liliana Madaleno, Auteur ; Svava Davidsdottir, Auteur ; Lars S. Jensen, Auteur ; Josep Palasi, Auteur ; Claus Erik Weinell, Auteur ; Kim Dam-Johansen, Auteur ; Søren Kiil, Auteur |
Année de publication : |
2020 |
Note générale : |
Bibliogr. |
Langues : |
Américain (ame) |
Catégories : |
Acier L'acier est un alliage métallique utilisé dans les domaines de la construction métallique et de la construction mécanique.
L'acier est constitué d'au moins deux éléments, le fer, très majoritaire, et le carbone, dans des proportions comprises entre 0,02 % et 2 % en masse1.
C'est essentiellement la teneur en carbone qui confère à l'alliage les propriétés du métal qu'on appelle "acier". Il existe d’autres métaux à base de fer qui ne sont pas des aciers comme les fontes et les ferronickels par exemple. Angle de contact Argile Caractérisation Chimie analytique Frottements (mécanique) Humidité Liants Matériaux cimentaires Mesure Métaux -- Revêtements Revêtements anti-adhésion Rhéologie
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Index. décimale : |
667.9 Revêtements et enduits |
Résumé : |
The handling of sticky raw material can cause problems during operation of process equipment in the cement production industry. These handling problems are generally observed when raw material (e.g., wet clay) sticks to machine walls and causes blockage of outlets. This leads to frequent production shutdowns and expensive cleaning operations. In this work, the effects of surface material and process parameters on the friction forces between wet clay and surface were investigated. Various surface materials and clay impact speeds were investigated. The results demonstrate that not only the equipment surface material but also the surface roughness influences the observed frictional behavior. The ranking of the materials in terms of effective static friction coefficients fell in two groups with equal performance within the group: (1) Two Teflon-based coatings (Accofal 2G54 and Accolan LB), polished AISI 304 stainless steel, Matrox lining, and a polyurethane-based coating (best performing surfaces), (2) Mild steel, a silicone-based coating, and AISI 304 stainless steel (worst performing surfaces). However, the friction coefficients of the two groups only varied by a factor of two, suggesting that adhesion of wet clay to surfaces is difficult to avoid by the use of coatings. |
Note de contenu : |
- INTRODUCTION : Mechanisms of wet clay adhesion to surfaces
- PILOT PLANT DESIGN AND MEASUREMENT SYSTEM : Pilot plant design - Calculation of the effective static friction coefficient
- STEEL DISKS, LINING, AND COATINGS : Contact angle measurements
- CHARACTERIZATION OF THE CLAY USED : X-ray analysis of the clay - Particle size analysis of the clay - Chemical analysis of clay - Mineral composition of clay - Rheological analysis of clay - Water content of clay
- RESULTS AND DISCUSSION : Effect of clay lump mass - Effect of repositioning of clay lump - Effect of surface material - The combined effect of surface material and roughness - Contact angle measurements |
DOI : |
10.1007/s11998-019-00240-3 |
En ligne : |
https://link.springer.com/content/pdf/10.1007/s11998-019-00240-3.pdf |
Format de la ressource électronique : |
Pdf |
Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33728 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 1 (01/2020)
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