| dc.description.abstract | Coal is still used in various industries with certain specifications, such as caloric value, ash content, sulfur content (Total Sulfur), flying substances (Volatile Matter) and water content (Total Moisture). Because the availability of coal with a variety of qualities is certainly not possible to meet the specification criteria that can be used by industry. Therefore we need a coal mixing system that can provide the quality desired by the industry or Market. In mixing coal there are several methods which are carried out and have different homogeneity. Coal blending using the chevron stockpile method and the windrow stockpile method were tested 5 times. Then the preparation of process was carried out using method of proximate analysis was carried out on the coal. The analysis results were then processed using the exel application. In the chevron stockpile method, the fluctuation value of coal quality analysis was as follows: total moisture had a range of 10.90, inherent moisture had a range of 14.58, ash content had a range of 39.76, votalite matter had a range of 4.71, fixed carbon had a range of 10.14, total sulfur had a range of 72.72 and calorie value had a range of 5.15. In the windrow stockpile method, coal quality fluctuation values were as follows: total moisture had a range of 6.84, inherent moisture had a range of 8.6, ash content had a range of 22.28, votalite matter had a range of 4.24, fixed carbon had a range of 8.18, total sulfur had a range of 31.82 and calorie value had a range of 1.61.
Keywords: coal mixing, chevron stockpile method, windrow stockpile method, coal preparation, coal
analysis, coal quality | en_US |
