Rheology and heat transfer during mineral residue phosphatation in a rheo-reactor
Identifieur interne : 000708 ( PascalFrancis/Corpus ); précédent : 000707; suivant : 000709Rheology and heat transfer during mineral residue phosphatation in a rheo-reactor
Auteurs : A. Nzihou ; B. Bournonville ; P. Marchal ; L. ChoplinSource :
- Chemical engineering research & design [ 0263-8762 ] ; 2004.
Descripteurs français
- Pascal (Inist)
English descriptors
- KwdEn :
Abstract
The rheo-reactor consists of a cylindrical vessel equipped with a double helical ribbon impeller installed in a RS150 controlled stress rheometer. It was used to investigate the rheological behaviour and the heat transfer in aqueous mineral residue suspensions during the phosphatation process. The absolute viscosity was determined using a Couette analogy allowing the quantitative analysis of the torque-rotational speed. The results show that the suspensions exhibit a viscoplastic or Binghamian behavior. The experimental operating conditions for the phosphatation process were then selected in order to ensure a good macromixing, even in laminar regime (Re < 30). Heat was generated as the combined result of the exothermic phosphatation process and the viscous dissipation inside the rheo-reactor. The heat produced needed to be efficiently removed to reduce its effect on the behaviour of the suspension. This was evaluated using the Nusselt number and the heat transfer coefficient h.
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Format Inist (serveur)
NO : | PASCAL 04-0428842 INIST |
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ET : | Rheology and heat transfer during mineral residue phosphatation in a rheo-reactor |
AU : | NZIHOU (A.); BOURNONVILLE (B.); MARCHAL (P.); CHOPLIN (L.) |
AF : | LGPSD, UMR CNRS 2392, Ecole des Mines d'Albi-Carmaux/Albi/France (1 aut., 2 aut.); Francc GEMICO, ENSIC/Nancy/France (3 aut., 4 aut.) |
DT : | Publication en série; Niveau analytique |
SO : | Chemical engineering research & design; ISSN 0263-8762; Coden CERDEE; Royaume-Uni; Da. 2004; Vol. 82; No. 5; Pp. 637-641; Bibl. 14 ref. |
LA : | Anglais |
EA : | The rheo-reactor consists of a cylindrical vessel equipped with a double helical ribbon impeller installed in a RS150 controlled stress rheometer. It was used to investigate the rheological behaviour and the heat transfer in aqueous mineral residue suspensions during the phosphatation process. The absolute viscosity was determined using a Couette analogy allowing the quantitative analysis of the torque-rotational speed. The results show that the suspensions exhibit a viscoplastic or Binghamian behavior. The experimental operating conditions for the phosphatation process were then selected in order to ensure a good macromixing, even in laminar regime (Re < 30). Heat was generated as the combined result of the exothermic phosphatation process and the viscous dissipation inside the rheo-reactor. The heat produced needed to be efficiently removed to reduce its effect on the behaviour of the suspension. This was evaluated using the Nusselt number and the heat transfer coefficient h. |
CC : | 001D07G; 001D07H |
FD : | Transfert chaleur; Phosphatation; Réacteur; Agitateur ruban; Viscosité; Analyse quantitative; Macromélangeage; Dissipation visqueuse; Nombre Nusselt; Coefficient transfert chaleur |
ED : | Heat transfer; Phosphating; Reactor; Ribbon agitator; Viscosity; Quantitative analysis; Macromixing; Viscous dissipation; Nusselt number; Heat transfer coefficient |
SD : | Transferencia térmica; Fosfatación; Reactor; Agitador cinta; Viscosidad; Análisis cuantitativo; Macromezcla; Disipación viscosa; Número Nusselt; Coeficiente transmisión calor |
LO : | INIST-4284.354000110309300100 |
ID : | 04-0428842 |
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Pascal:04-0428842Le document en format XML
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<ET>Rheology and heat transfer during mineral residue phosphatation in a rheo-reactor</ET>
<AU>NZIHOU (A.); BOURNONVILLE (B.); MARCHAL (P.); CHOPLIN (L.)</AU>
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<EA>The rheo-reactor consists of a cylindrical vessel equipped with a double helical ribbon impeller installed in a RS150 controlled stress rheometer. It was used to investigate the rheological behaviour and the heat transfer in aqueous mineral residue suspensions during the phosphatation process. The absolute viscosity was determined using a Couette analogy allowing the quantitative analysis of the torque-rotational speed. The results show that the suspensions exhibit a viscoplastic or Binghamian behavior. The experimental operating conditions for the phosphatation process were then selected in order to ensure a good macromixing, even in laminar regime (Re < 30). Heat was generated as the combined result of the exothermic phosphatation process and the viscous dissipation inside the rheo-reactor. The heat produced needed to be efficiently removed to reduce its effect on the behaviour of the suspension. This was evaluated using the Nusselt number and the heat transfer coefficient h.</EA>
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