Rheological models for calcium carbonate/ kaolin suspensions for papercoating applications

• Autorzy: Papo A. , Piani L.
• Konferencja: Proceedings of the International Conference on Engineering Rheology ICER '99
• Języki publikacji: EN

Abstrakty

EN

The rheological behaviour of calcium carbonate/kaolin aqueous suspensions has been studied. The mixes were prepared with a vane stirrer at various solid volume fractions (0.32 to 0.43). The tests were carried out at 25oC by using the rate controlled coaxial cylinder viscometer Rotovisko-Haake 20, system M5-osc., measuring device MV1P with serrated surfaces. Flow curves were determined by varying the shear rate from 0 to 1000 s-1 at constant shear acceleration. All systems show shearthinning flow behaviour. Some rheological models which correlate relative viscosity with shear rate and solid volume fraction were taken into consideration with the purpose of selecting one model suitable for describing the shear-dependent behaviour of calcite/kaolin suspensions. The Eilers-Robinson equation written in a modified form was checked at any solid volume fraction. An excellent fitting of the experimental data was also performed with the Quemada equation.

Słowa kluczowe

EN

suspensions; rheological model; calcium carbonate; kaolin

PL

reologia

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: Applied Mechanics and Engineering
• Rocznik: 1999
• Tom: Vol. 4, no spec.
• Strony: 387--392
• Opis fizyczny: Bibliogr. 8 poz., tab., wykr.

Twórcy

autor

Papo A.

autor

Piani L.

• Dipartimento di Scienze e Tecnologie Chimiche. Universita degli Studi di Udine. Via Cotonificio, 108. I-33100 Udine. Fax: [phone]. ITALY