Low-Rank Coal and Self-Combustion of Coal in Indonesia Edy Nursanto, Dessyanto Boedi Prasetyo, Bambang Supriyanta and Heru Suharyadi
Universitas Pembangunan Nasional Veteran Yogyakarta
Abstract
Indonesia^s low-rank coal, also known as lignite, is a type of coal with a relatively low energy content, high moisture content, and high volatility. These characteristics make it more susceptible to spontaneous combustion, a significant challenge in coal mining and storage. Characteristics of Low-Rank Coal that is High Moisture Content: Typically contains 30-40% moisture, which can lead to a higher risk of spontaneous heating. High Volatility: The presence of volatile matter increases the tendency of the coal to ignite spontaneously. Low Energy Content: Lower calorific value compared to higher-rank coals like bituminous and anthracite. Self-combustion, or spontaneous combustion, occurs when coal heats up due to oxidation without an external heat source. The oxidation process generates heat, and if the heat is not dissipated, it can cause the coal to ignite. Factors Contributing to Self-Combustion Coal Properties: High moisture and volatile content increase susceptibility. Storage Conditions: Large coal piles with poor ventilation trap heat. Environmental Factors: High ambient temperatures and humidity can accelerate the oxidation process. Handling Practices: Crushing and transporting coal can expose fresh surfaces to oxidation. Managing the risks associated with low-rank coal and spontaneous combustion is crucial for safety and efficiency in the coal industry. By understanding the factors that contribute to self-combustion and implementing appropr
Keywords: low-rank coal, self-combustion, mitigation of coal self-combustion
