High-calorie coal means that burning coal produces more energy, which reflects the heat released when coal is burned, that is, the calorific value index of coal. The index can be divided into calorific value and high calorific value according to different analysis processes. and low calorie value units are kcal.
The quality indicators of coal include calorific value, volatile matter, ash content, moisture and sulfur content.
Raw coal is directly mined coal. The standard calorific value of coal is 7000 kcal, and the low-calorie raw coal of 1000-2000 refers to the raw coal with a calorific value of only 1000-2000 kcal. Because of its low calorific value, it is called “low-calorie raw coal”.