Jun Shutong glanced at Yingying, then smiled mysteriously and said:

"Coal has many benefits. I'll tell you when I have time."

"good."

Hearing the young lady say this, Yingying knew that this matter should not be made public for the time being, otherwise the young lady would have announced it to the public long ago.

Except for Xia Xue and the ten guards, no one here knows the specific use of coal.

After following Jun Shutong for so many years, they already knew what to say and what not to say. Even if it was Yingying, their own family, they would not reveal a single word unless the young lady brought it up.

It’s not that Jun Shutong is keeping it a secret, it’s just that now is not the right time.

Among those guards, there were countless spies planted by the noble families. Even Emperor Shunde had more than one or two spies.

From the beginning, Jun Shutong pretended not to know about these things and asked them to report the current situation back. Fortunately, apart from building houses and making friends with a few mysterious beasts, she had not made any other achievements, so those people were not jealous of her.

When the major families received the news of the Mysterious Beast Forest, they were all dumbfounded. They just thought that Jun Shutong was crazy and couldn't stand the blow of being driven out of the royal capital, so he wanted to keep the mysterious beasts as companions and even built a house in the forest.

Jun Shutong didn't care about other people's feelings. She was busy directing the workers to classify the coal into several types.

So that when selling in the future, there is no need to make temporary distinctions. Classifying them at the source will save a lot of trouble in the future.

Different qualities and prices are distinguished by the degree of coalification.

The following is an introduction to how to distinguish coal. If you are not interested, jump to the next chapter directly!

Lignite: It has a low degree of coalification, is brown in appearance, contains high moisture and volatile matter, is easy to burn, and is mainly used for thermal power generation and chemical raw materials.

Bituminous coal: It has a high degree of coalification and is further divided into lean coal, lean coal, lean coal, coking coal, fat coal, gas coal, etc. according to its volatile matter and coking properties. It is mainly used for coking and power.

Anthracite: It has the highest degree of coalification, is black in appearance, shiny, hard in texture, and has low volatile matter. It is mainly used in civil and chemical industries.

Classification by purpose:

Thermal coal: used for thermal power generation, steam locomotives, building materials, etc., requires high calorific value and is commonly found in large thermal power plants.

Coking coal: used for coking to produce coke, it is an important raw material for the steel industry, including coking coal, fat coal, lean coal, gas coal, etc.

Anthracite: Mainly used in civil and chemical industries, it has a high carbon content and produces almost no black smoke when burned.

Classification by coal seam thickness:

Thin coal seam: thickness is less than 1.3 meters.

Middle coal seam: thickness is between 1.3-3.5 meters.

Thick coal seam: thickness is more than 3.5 meters.

Classification by coal quality characteristics:

High sulfur coal: has a higher sulfur content.

Low sulfur coal: has a lower sulfur content.

High ash coal: has a high ash content.

Low ash coal: has a lower ash content.

Different types of coal differ in their properties and uses.