PRODUCTION OF HIGH-CALORIC COAL BRIQUETTES FROM THE EKIBASTUZ COAL DEPOSIT

The article provides information on the coal briquetting process, the briquetting process, and establishes the mechanism of coal briquettes structure formation taking into account the physicochemical and structural-rheological properties of coal. Of great importance is the uniform distribution of elementary size classes in the briquette charge. It is achieved by choosing a coal classification process flow chart and appropriate equipment. The coal size determines the total surface area of the briquetting mass particles. The more developed this surface area is, the greater the number of particle contacts inside the briquettes and the more intense the action of molecular adhesion forces. The increase in the total surface area of the grains can be achieved by crushing. The main factors influencing the coal briquetting process are: coal moisture and moisture distribution in individual classes, coal size, distribution of elementary size classes in the briquette charge, granulometric composition, pressure, pressing duration and temperature, water content.