Construction of screener oriented on application of parametric resonance

Abstract

The problem with obtaining high efficiency screening process in the coal, metal mining, building and other industries lead to invent new constructions of the screeners. The rapid progress of screening techniques and screen design was observed in the past and nowadays the development of screen is stabilized and most of equipment produced by various machines companies is very similar. In spite of this, there is always a need to improve the performance of screens. Increase capacity and efficiency of screening process on the one hand, and decrease its ecological footprint are the main goals of development of a new screening equipment. The screening machines inventive method is parametric resonance excitation of the screen sieve mesh. The model of laboratory screener based on parametric resonance for fine granular materials is presented in this paper. The working principle of the screener is included showing, that the parametric resonance screener could obtain a complex motion of the sieve, which is desirable with processing naturally wet fine granular materials.

A study of variations of areal parameters on machined surfaces

“…Similar to other surfaces, the variability of the S mr parameter was large. The non-stable character of this parameter was confirmed by other research [29,30]. S xp was also a non-stable parameter.…”

“…The cv of the spatial parameters S al and S tr were similar to those of the height parameters (excluding S v ). The coefficient of variation cv for slope S dq was smaller than that for the developed interfacial area ratio S dr , and this behavior was also found for other analyzed surfaces in different studies [29,30]. The variations in the feature parameters were comparatively high, particularly S dv .…”