Comportamiento reológico de pulpas de cuarzo a diferentes concentraciones del sólido

Abstract

The viscous behavior of quartz pulp from mills was characterized by measuring their viscosities at different times for several grinding times and solid concentrations, using a Brookfield viscometer. The rheology modifier hydroxyethylcellulose (HEC) was used for preparing the suspensions, for avoiding the problem of sedimentation and for evaluating the influence of the concentration of solids on the pulp as well as on the difference in particle size. The results indicate that the Newtonian characteristic of a solution of 0.3% HEC is affected by the increase of solids in the suspension. This effect is more notorious for a solid concentration of 60%. It was also observed that for the same concentration, the solid size reduction parameter of the sample does not produce significant changes in the rheological behavior of the pulp, for low percentages (lower than 40%).