Proposal for an Improvement of Hard Coal Enrichment Accuracy in Systems with Secondary Beneficiation

Abstract

There are various ways to improve the accuracy of hard coal enrichment. This article discusses the possibility of improving the accuracy of beneficiation by using the same enrichment machines located in the processing plant, introducing only the multiple (secondary) enrichment of raw coal feed. Secondary enrichment is a technology that allows for an improvement of the accuracy of mineral separation. The main advantage of this solution compared to that currently used is the lack of the necessity of introducing the crushing process. Secondary enrichment without crushing is a simple solution, and at the same time beneficial from the point of view of obtaining a commercial product with specific quantitative and qualitative parameters. This article shows the effect of this type of enrichment on the improvement of the shape of partition curves in an example of systems with two-product jigs. On the basis of the results of simulation studies, it was shown that the use of secondary enrichment results in obtaining a higher yield of concentrate of a given quality and thus increasing production value. The article uses the method of digital modelling of coal processing operations and technological systems, which should be treated as one of the possible methods of creating new knowledge, in particular knowledge about the behavior of concentrator group systems under different production assumptions and with different raw coal characteristics.

Keywords

• hard coal enrichment
• two-product jigs
• method of digital modelling