PARAMETRIC EVALUATION OF THE VIBRATING SCREENS FOR PERFORMANCE ASSURANCE IN SORTING MINERAL AGGREGATES

Marilena Cristina NIŢU

Abstract


The scope of the research presented in this paper is that of establishing the parametric performance of the inertia vibrating screens used in sorting the mineral aggregates extracted from water basins (river gravel) or, from stone carriers. Essentially, the quality of processing mineral aggregates for construction consists in assurance the purity of sorts on granular classes so that deviation from the medium size of the granulometric particle stands within the limits mentioned by specific standards. In order to achieve this, it is necessary for the inertia vibrating screen, with one or more sieves, to have the optimum values for the throwing coefficient of material onto the screen, so that material passing through screen sieves to be done within the precision limits mentioned by the standard  on mineral aggregates. This is the case when fundamental parameters for determining the throwing coefficient are the amplitude and pulsation of the technological vibrations. This paper presents the values of optimum range for the technological vibration’s pulsation, so that to achieve constant and stable amplitude and, therefore, the throwing coefficient values to be within the limits of 3-15 for sieve meshes of 5mm – 25 mm.

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References


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