Introduction
Coal is one of the most important sources of energy. It is a combustible black or brownish sedimentary rock formed from the remains of plants preserved in sedimentary rocks. Over the centuries, coal has been used as a fuel source for many sorts of activities including manufacturing, heating, and even locomotive transportation. As the demand for coal continues to rise, its composition and quality are constantly evolving. One of the key factors that measure the quality of coal is the coals true density.
What is Coal True Density?
Coal true density is a measure of a coal samples mass per unit volume. This mass is calculated through the use of a specialized balance, also known as an appropriate balance. The coal sample is placed on the balance and the mass of the coal sample is determined. Density is then found by dividing the mass of coal by the volume, usually given in cubic centimeters. This measurement is most often used to assess coal quality, as the higher the true density of the coal, the higher the quality.
How to Measure True Density?
The true density of a coal sample can be determined in three steps. First, the coal sample must be dried so that all moisture is removed. This is done by placing the sample in an oven set to a temperature generally around 105￣C. The sample is then placed in the appropriate balance, which measures the mass of the sample. Finally, the volume of the sample is then measured using a graduated cylinder. With the mass and the volume, the true density can be calculated by dividing the mass by the volume.
The Significance of Coal True Density
The true density of coal is a very important measurement when assessing coal quality. The higher the true density, the higher the coal quality, which means it has higher thermal efficiency. This is because a higher true density indicates that the coal particle is denser and compact, meaning it contains more energy than coal of a lower true density. Additionally, the true density of coal helps to determine how much ash and moisture are present in the coal, as well as the energy content of the coal. This helps to determine if the coal sample is suitable for certain uses as well as what applications the coal sample is best suited for.
Conclusion
The true density of coal is an important measurement when assessing the quality of coal. A higher true density indicates a denser, more energy-rich coal sample and can significantly impact the grade of the coal sample. Additionally, the true density of a coal sample helps to determine its suitability for specific applications. Understanding the true density of coal is essential for selecting the best coal for certain applications and for assessing coal quality.
