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Abstract
Article concerns problem of jig beneficiation of mineral aggregates and focuses especially on problem of separation of hard-enrichable materials. Investigative programme covered tests in laboratory and semi-plant scale and material with different content of regular and irregular particles, along with various particle size fractions, was under analysis. Two patented solutions were utilized as methodological approach and densities and absorbabilities of individual products were determined and major novelty of approach consist in separate beneficiation of regular and irregular particles. Results of laboratory investigations showed that more favorable separation effectiveness was observed for the narrow particle size fractions of feed material. In terms of absorbability difference between separation products from I and IV layer was 0.4–0.5% higher for regular particles, and up to 0.5% higher for irregular grains. Differences in densities of respective products were 0.1% higher for regular particles. Results of semi-plant tests confirmed the outcomes achieved in laboratory scale. The qualitative characteristics of separation products in terms of micro-Deval and LA comminution resistance indices were one category higher for regular particles, and two categories higher for irregular grains, comparing to the raw material.
Highlights
Jig beneficiation is a simple and economical method of raw materials enrichment.It is especially efficient for separation of minerals with relatively high differences of their densities
Analysis of results obtained for tests I and II shows that absorbability achieved for the bottom layer I was the lowest
Product from layer I with regular particles had the highest content of quartz particles comparing to the other products, especially to irregular particles, where a sandstone predominated
Summary
Jig beneficiation is a simple and economical method of raw materials enrichment. It is especially efficient for separation of minerals with relatively high differences of their densities. The environmental footprint of jig beneficiation is low, especially in terms of dust and noise pollution and due to relatively low water and energy consumption, comparing to flotational separation or chemical beneficiation, and selected operations of mechanical enrichment [1,2,3]. An up to date review of the jigging operation fundamentals and outlines of directions for future research and developments were presented in [4]. The configuration, operational principles, and main applications of different jig types have been comprehensively reviewed. In general, quite simple method of raw material beneficiation and quite well documented in literature
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