A MILLING REVIEW
This review deals with equipment, operation and performance of mills in a tandem or as dewatering units as presently found in the South African sugarindustry. With milling tandems gradually being replaced by diffusers the emphasis will be particularly on the last mill. On the equipment side items that are considered are the number of mills, mill rolls, roll grooving, feeding devices, trash plates and mill drives. On the operation side they are the mill settings, hydraulic loading, mill speed, arcing and control that are investigated. The most common performanceindicators for the extraction plant as a whole are extraction and bagasse moisture with little or no indicators for individual mills. Some performance parameters for these mills are suggested.
Improving the Efficiency of Extraction of Sugar Cane Mills Using Rollers with Compound Triple Pitch
Sugar cane mills are the equipment used in extracting sugar solution from sugar cane plant. The effect of the roller pitch has been studied as one of the constituent parts of the mills by modifying the universal pitch to the triple pitch compound and experimenting with extracting different sugar cane weights ( total nine samples ) . On both mills , universal and triple compound pitch on the mills rollers under the same conditions and control of the correct setting taking into account with the uniformity of samples and it was recorded the results were positive by increasing the weight of the squeezed sugar cane in the three pitch compound rollers mills of extracted juice which increasing percentage up to 3.02 % in contrast to the extraction of single pitch rollers mills which was positive only on low weights.
Mathematical Simulation of Combustion of Boron Powder Gas Suspension
Based on a two-phase two-velocity model of a reacting gas-dispersed medium, a mathematical model of combustion of a boron powder gas suspension has been formulated. The results of numerical solution of the problem are presented. The influence of the composition of the gas suspension, its size, size distribution of particles, mass concentration of particles, as well as of the presence of aluminum powder in the suspension on the visible and normal velocities of flame propagation in the gas suspension, is shown. A comparison of the results of calculation with the well-known experimental and theoretical data is carried out. Satisfactory agreement of the predicted results with experimental data is shown.