1, the calorific value of No.1 coal mine is high, and the standardized assessment score of safety production of Class I coal mine is above 90, with less environmental pollution. The combustion is tasteless, grayish white, less ash, low ignition point, easy to ignite, light specific gravity, and the calorific value is 7000 kcal.

2. The second coal mine has a high calorific value, and the standardized assessment score of the first-class coal mine safety production is only above 80 points, and its performance is linked to charcoal, which is the best product to replace charcoal. Suitable for pure blue carbon or mixed carbon to make barbecue machine charcoal.