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  • Essay / Binder Viscosity - 1025

    Binder viscosity has been changed by temperature change. The initial dispersion of the binder in the powder depends on the viscosity and the applied shear rate. (Schaefer, 1996) The viscosity of the binder also controls the rate of consolidation and therefore the subsequent growth by coalescence. (Ennis et al., 1991). The results of Rough et al (2005) showed that at higher temperatures (lower viscosity), the regimes are reached more quickly because the binder is able to distribute itself more efficiently in the mixture at a given shear rate, which is consistent with work reported by Schaefer et al. al (1996). As the amount of LAS paste increased, the mixing time required to form the designated diets decreased. Work by Hibare (2012) showed that the maximum modal granule diameter remains similar in reactive and non-reactive high viscosity binder systems, which is believed to be due to mixing time. Mort et al (2001) stated that the method of introducing/adding the binder could influence the width of the particle size distribution of an agglomerate. A smaller binder droplet size can result in a narrower particle size distribution. According to Schongut et al (2013), particle size distributions depend weakly on the agitation rate (wheel speed) but depend more strongly on the state of the binder. Schongut et al (2013) presented size distribution results at three different temperatures, with the highest temperature having the narrowest size distribution. The experimental research work carried out by Schongut et al (2013) was carried out in a stirred glass reactor with a bed of sodium carbonate powder and the binder (dodecyl-benzenesulfonic acid) injected into the bed. The powder bed was in stoichiometric excess and each powder bed was used for two kinetic experiments before being discarded. Use the powder bed twice before... the middle of the paper... the particles move closer together in the paste. Due to the viscosity and therefore reduced flow of the binder through the interparticle spaces, the consolidation process is slowed, thereby delaying any excessive bead growth. This research aims to study the granulation mechanisms involved in a high viscosity detergent system in order to understand how a high viscosity binder is dispersed compared to a low viscosity binder. This research would not work with low viscosity binders and would compare the research results with published work done on low viscosity binder granulation systems. More importantly, the research would focus on the effects of process parameters such as binder injection point (on which no literature was found) and granulation time as well as turbine speed and quantities binder (with much more published literature).).