Marco Commodities Traders

Coal described as Premium Quality, with specifications guaranteed on an "as received" basis. Its characteristics make it a coal with high energy value, low in impurities and good industrial performance. ________________________________________ Premium Quality Characteristics Calorific Value Coal has a high calorific value, essential for energy generation and industrial processes. • Its Gross Calorific Value (GCV) is typically 12,900 BTU/lb (or 7,166 KCal/kg), with a very narrow range of 12,800 to 13,100 BTU/lb. Low Ash and Sulfur Content One of the keys to its classification as Premium is its low level of contaminants and inert material, which results in less equipment maintenance and a lower environmental impact: • The ash content is remarkably low, with a typical value of 7.00% and a range of 6.50% to 7.50%. • The Total Sulfur content is low, at only 0.80%, minimizing sulfur dioxide (SO2) emissions. ________________________________________ Detailed Analysis (As Received Basis) Proximate Analysis This analysis confirms a balanced composition ideal for combustion: • The Fixed Carbon content is high, typically 52.00%, ensuring sustained heat release. • Volatile Matter is at 34.00%, indicating that a good portion of the energy is released quickly at the start of combustion. • Total Moisture remains low, at a typical value of 7.00%. Physical and Melting Properties • Free Swell Index (FSI): No typical value is specified, but it is listed as a quality parameter. • Ash Melting Temperatures: Ash is highly resistant to melting, with pour points above 1,275∘C in both reducing and oxidizing atmospheres, reaching up to 1,510∘C. This prevents slag formation and protects furnaces. Ash Composition: Ash is predominantly siliceous-alumina, which is common in good quality coals: • Silicon Dioxide (SiO2): 49.42-62.10%. • Aluminum Oxide (Al2O3): 17.12-28.32%. • Magnesium Oxide (MgO) content, relevant for refractoriness, is between 1.19% and 4.97%. • Phosphorus content is extremely low, only 0.004, a critical contaminant in metallurgy.