Effect of Four Anticaking Agents on the Bulk Characteristics of Ground Sugar

Abstract

Powdered sugars are known to be fairIy cohesive mater-I Fine silicon oxide, sodium aluminum silcate, tricalcium phosphate and calcium stearate powders were admixed with dry ground sugar at four concentration levels between 0.1 to 2%. Appreciable increase in loose -bulk density and decrease in compressibility were notice able at 0.1% concentration in alI four agents. Theeffect reached an apparent peak'or a flat maximum at an agent concentration of about OS-l%. With the exception of silicon oxide treated powders, increase in density was-accompanied by a corresponding decrease in compressibility. Bulk parameters (i.e., density and compressibility) were more sensitive indices to changes occurring in powders as compared to parameters determined in compacted specimens (i.e., yield in shear, internal friction and relaxation pattern). Results are explained in terms of possible bed arrays and their scatter by differences in particle size and shape distributions. Support for these explanations is' presented in scanning electron micrographs of sugar treated and untreated particles.

Effects of soybean oil, cellulose, and SiO2 addition on the lubrication and product properties of rice extrusion

“…This fact illustrated that these additives acted as flow agent or solid lubricant which could result in the slippage of raw materials leading to a decrease in feed rate. The effect of lubrication was also observed in previous powder industry studies, an appropriate level of flow agent addition could improve the flowability of the powder except an excessive level could prevent (Hollenbach, Peleg, & Rufner, 1982;Peleg & Hollenbach, 1984;Peleg, Mannheim, & Passy, 1973).…”

Effects of eggshell powder addition on the extrusion behaviour of rice

“…In previous powder industry studies, it was also observed that an appropriate level of flow agent addition could improve the flowability of powder but an excess level could prevent it (Hollenbach, Peleg, & Rufner, 1982;Peleg & Hollenbach, 1984;Peleg, Mannheim, & Passy, 1973). Therefore, the addition of excess eggshell powder decreased the effect of lubrication resulting in less decrease in feed rate leading to inverse changes in feed rate.…”

Flowability and Handling Characteristics of Bulk Solids and Powders - A Review

“…Above a certain inclusion rate, however, the conditioner can retard the overall flow of the material (Hollenbach et al, 1982;Nash et al, 1965;Irani et al, 1959). If the surface affinity between the host powder and conditioner is strong, then large effects will be present in the bulk density and compressibility at inclusion concentrations of 0.1 to 0.5%.…”

“…If the blends of the conditioning agents result in the filling of interparticle void space only, then the conditioner's bulk density is given by (Hollenbach et al, 1982):…”