Polish-type jigs designs for coal and mineral processing

The purpose of this paper is to review recent designs of polish pulsating jigs for hard coal and gravel-and-sand preparation which have been developed in Poland. In last years the design of such jigs has undergone complete modification. Many producers of electronic control systems have also made a real contribution to the automation of the cleaning process. The polish jigs have become fully competitive with other types of gravity separators. This article shows basic technical parameters of polish jigs on the basis of its high capacity per unit with high imperfection in coal preparation plant or high efficiency separate gravel and sand in mineral preparation plant. The adoption of a computer-controlled system in the design of the jigs have provided several advantages, for example control of water pulsation within any selected cycles, automatic control over the collection of the bed, automatic control over the loosing of the bed, relatively low costs of cleaning and its overall "clean" technology with potential ability to reuse "waste". The latter aspect of coal and rocks separation or gravel, sand and organic or mineral contaminants separation is particularly important for environment protection.