Upgrading of qualitative characteristics of Yakutia brown coals

Abstract

In Yakutia the fuel-and-energy balance involves low-grade brown coals originated from Kangalas, Kirov and Kempendyay deposits. The techniques to improve the efficiency of utilization and conservation of these coals involve classification of coals and burning of coarse-size products, enrichment, and briquetting of fine coal products. The last technique permits to upgrade the poor-grade coals of low demand and to produce the full-value fuel coal, convenient for transportation, long storage and effective combustion. The experimental results are given on the agglomeration of Kirov brown coal by briquetting with the introduction of polyethylene crumbs into the briquetting blend. This addition promotes 20 % increase in combustion heat as compared to this parameter for the original coal. The researchers propose the technological scheme for classification, preparation, follow-on briquetting of brown coals. The urgency of a local classification-and-briquetting plant is pointed out.