Evaluation of the Effects of Coal Jigging by Means of Kruskal–Wallis and Friedman Tests

Coal beneficiation processes are often based on gravitational enrichment techniques. Therefore, various types of jigs used in this area. A number factors determine the quality final product. proper and systematic monitoring such a process is necessary. The present work examined effect hutch water amount processed coal (system capacity) yield ash grade individual density–size fractions. statistical method form Kruskal–Wallis test Friedman was to evaluate process. These tests were proposed as universal reliable alternatives classical analysis variance (ANOVA) analysis. performed allowed for determination what conditions should be selected order obtain certain effects. it us apply combinations amount, system capacity particle characteristics maximize expected application methods efficiency creates new possibilities monitor optimize jigging both context product very important not only mining enterprise but also from an environmental point view.