Modeling of processes and technologies of the Concentrating Raspadskaya Factory for assessing the impact of dilution of raw coal on the technological performance of enrichment products

Abstract

The paper presents a brief literature review on the impact of the dilution of mined coal from complex structural deposits on losses during selective and gross excavation of layers. The increase in dilution leads to a reduction in coal losses during mining. The effect of dilution on the loss of coal with beneficiation was established. A method is proposed for calculating sieve and fractional composition of coal depending on the ash content of the diluted coal using the example of sample No. 9 of the reservoir developed at Mine cut Raspadsky CJSC. The effect of ash content of diluted coal, enriched according to the technology of the Raspadskaya Processing Plant, is shown on the technological indicators of the enrichment products in the practical balance. It has been established by computational experiments that when the ash content of ordinary coal changes from 17.8% to 25.2% and the condition that the concentrate should have an ash content in the practical balance of not more than 6.8%, its output decreases from 84.4% to 73.3%, i.e. 11.1% of concentrate is irretrievably lost with rock shipped to the dump; the ash content of the rock decreases, which can lead to its ignition at the dump. An increase in rock yield, in turn, will lead to additional transport costs and even greater environmental damage.