Prospects for using screens with double vibration-impact excitation for size separation and dewatering of wet mineral raw materials that are difficult to classify

One of the most labor-intensive and energy-consuming processes is the process of particle size separation and removal of moisture from products of wide particle size classes with a high content of small classes less than 0.2 mm in size. Such raw materials are dehydrated by traditional methods to 18-22% and are practically not classified. A review of methods for intensifying these processes showed the promise of vibration impact, which can be applied to both the sieving surface and the processed raw materials. The designs of screens with double vibration-impact excitation for particle size separation and dewatering of wet mineral raw materials are considered. The influence of operating parameters and screening time on the technological performance of these processes was experimentally studied. It was established that the use of a disintegrator simultaneously with an activator and disintegrating elements made it possible, without the use of additional power, to reduce the moisture content of the over-grid product to 4-5% while extracting the -0.1+0 mm class into the under-grid product to 83-85%. The results obtained confirmed the prospects of using screens with double vibration-impact excitation for size separation and dehydration of wet mineral raw materials that are difficult to classify.