Influence of the Static Screen Inclination on the Effect-ive Separating Size and Concentration of Beach Sand Minerals

Abstract

In this paper an attempt has been made to evaluate the effect of inclination of micro screen on the effective separating size of beach sand minerals. The results of these investigations indicate that the cut sizes of 130pm, 122pm, 63pm, 55pm and 40pm could be obtained from a feed containing —1mm size range with a variable deck inclina-tion such as 35°, 40°, 67°, 70° and 75° respectively. The cut sizes are evaluated based on the partition curve according to Tromp. The typical size analysis data obtained at cut size of 63pm, indicate that the overflow and +300pm size fraction of the under flow contain rejec-table tailings amounting to 51% by weight with overall heavies loss contain 4.7%, Thus micro screen is effective for dual purpose such as classifications like hydrocyclone and preconcentration like a spiral concentrator. Hence, it can be concluded that the micro screen is not only an effective for classification at different cut points but also can work as a good preconcentrator for beach sands.