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.
Experimental investigation of the geotechnical properties and microstructure of lime-stabilized saline soils under freeze-thaw cycling
Abstract The Song-Nen Plain in northeastern China holds one of the three largest expanses of soda saline-alkali soil in the world. Due to its disadvantageous geotechnical properties, the saline soil in this area is unable to meet the needs of construction projects. This study evaluates the stabilizing effect of adding lime to such soils. Specifically, it investigates how the physicochemical and mechanical properties and microstructure of soda saline-alkali soil are altered by lime and how these changes are affected by both freeze-thaw cycling and the duration of curing. The results reveal that adding lime to saline soil transforms clay particles into sand and silt particles and causes the pore size distribution (PSD) to become bimodal, with small-pore and macropore populations. An increase in lime content leads to an increase in the unconfined compressive strength (UCS) but a gradual decrease in both the cation exchange capacity (CEC) and plastic index. Freeze-thaw cycles break up coarse particles and aggregate finer particles, increasing the diameter of macropores and decreasing the USC; however, the effect on specimens with >9% lime is negligible. It is further shown that the geotechnical properties of the soil change immediately after the addition of lime, indicating that the cation exchange reaction takes place very quickly. Furthermore, the pozzolanic reaction leads to an increase in the percentage of sand-sized particles and a decrease in porosity after 28 days of curing. Overall, these results indicate that it is feasible to use lime to improve the engineering properties of soda saline-alkali soil in this area.