Abstract. The role coal in power industry is predicted to be increased in future that is caused by its large stocks and depletion of oil and gas fields. Due to production growth, deterioration in mining and geological conditions and broad mechanization of production, the quality characteristics of coals as ash content, particle-size distribution, humidity and sulfur content worsen. Therefore, practically all mined coal requires enriching. The smallgrade and fine concentrates received after enrichment often happen to be unsuitable because of their fineness for further processing or direct use. Therefore briquetting is applied for possibility of further processing or increased utilization efficiency. Compared to the conventional fuel the briquetted fuel possesses higher calorific capacity and bigger stability during storage and transportation.
Выполнено исследование по установлению взаимосвязи петрографических особенностей и спекающихся свойств углей. Угли Кузнецкого бассейна крайне разнообразны по петрографическому составу и поэтому уголь каждого пласта следует рассматривать как естественную шихту, состоящую из плавких и отощающих компонентов. Объектом исследования были выбраны концентраты углей коксующихся марок обогатительных фабрик Кузбасса. По данным технического анализа образцы углей близки по зольности (A d = 7,6-11,8 %). Показатели выхода летучих веществ (V daf = 19,8-38,0) и толщина пластического слоя находятся в тесной связи с петрографическим составом и стадией метаморфизма углей. На основе петрографического параметра-показателя отражения витринита (Ro,r), угли по генетической классификации относятся к 07-13 классу, объединяющие угли коксующихся марок. Формы рефлектограмм, полученные на основании показателя отражения витринита, позволяют прогнозировать возможные изменения в производственном процессе при дальнейшем применении той или иной марки угля.
In this work, the objects of the study were CWC coals (coking weakly caking coals). The samples were characterized by technical analysis, which showed that the coals are close in ash content (Ad = 3.4-8.4%) and the yield of volatiles (Vdaf = 18.4-21.4%). Petrographic analysis determined the vitrinite reflection index (Ro, r), which showed that the studied coals, according to the genetic classification, belong to the 11-13 class, corresponding to the CWC grade coals. Based on the vitrinite reflectance index, reflectograms were compiled, which are an effective means of assessing the quality of coal.
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