The return of the elite combat team did not have much impact on Baiyun Village, and the people of the village continued to devote themselves to the busyness of spring planting after they were happy.

After all, this is a major event in the village, and it is also related to everyone's rations in the second half of the year, not to mention the villagers, even the members of the combat team have also returned to the rural farming mode.

The tranquility and vitality of Baiyun Village were as if the previous worries and chaos had never happened, and this beauty was in stark contrast to the outside world.

At present, the attention of the whole village is focused on spring planting, completely unaware that the outside world has been raging and panicked.

On the second day after Song Shaoqin returned to the village, he started his regular work mode, and the heart of An An'an's family was almost the same after a day of rest at home, not to mention that there was nothing wrong with his body.

**

At this time, the coal mining area of the back mountain.

"Second master, do you see if this is what you want?"

Cao Tianrong suppressed his excitement and pointed to the black thing on the wooden table and asked.

After a year, he and Mai Dong took over the errand of the coal mining area, and they almost stayed in the coal mining area for a month and a half to do two things, one was to continuously excavate the underground coal, and the second was to reasonably process the excavated coal.

The coal they excavated from the underground coal mines can be divided into four categories: gross coal, raw coal, mixed coal, and lump coal.

Both of them came into contact with coal mining for the first time, and they also learned a lot of knowledge points that they didn't know before.

The so-called gross coal is the coal dug out of the coal mine without any processing, while the raw coal refers to the crude coal mined from the ground, and the coal after screening and processing to remove gangue, pyrite, etc.

The main role of this raw coal is in the industrial raw materials and civil raw materials, the raw coal is sifted, and the blocks of different sizes are screened out, that is, lump coal.

As for mixed coal? It is a blended coal made by blending several different types of coal with different properties according to a certain proportion.

In the first half of the month, they urged the labor reform workers to dig coal, and directly filled the two factory sheds at the foot of the mountain, and then they began to follow the instructions of the second master and began to try to process the coal.

Their main research and production is coal and briquettes.

Although the freshly mined coal can be burned directly, this kind of coal contains impurities, which will cause certain pollution to the environment, and must be washed with water.

That is, through stirring, separation and dissolution, etc., the coal is crushed into smaller particles in order to be better mixed with water, and then the coal particles are soaked in water so that the water can penetrate into the inside of the coal, so that the impurities and ash in the coal are removed in this operation process.

This improves the quality and flammability of the coal.

They had no experience in the first operation process, and the whole process was very sloppy, but after the experience, the operation process was much simpler, and now they not only processed good coal, but also successfully made briquettes.

In fact, it is not difficult to make briquettes, mainly how to control the proportion of raw materials.

Although the second master gave them the recipe, the words that can be recorded are one thing, and the operation is another.

Compared with the processed coal, the process of making this briquette is much simpler, that is, it is mixed with water to mix pulverized coal and yellow clay in proportion, and then directly pressed into forming with a briquette mold, and finally dried.

At first, they had no experience, so they didn't use the mold directly, but cut it into small pieces, added pulverized coal to the dustpan, and rolled it directly into the shape of a briquette by hand.

Now that the briquettes have been made, they have tried them, and the effect is very good, but he and Mai Dong have also successfully become black charcoal people.

"Very good, what is the result I want?" Song Shaoqin looked at the coal and briquettes on the table with a satisfied expression, which were consistent with what he saw in the book.

Mai Dong said, "Don't worry, Second Master, we have already used it, and it is similar to what you said before, but this coal still has a certain amount of soot during the combustion process." ”

"Well, let's think about this coal well, and try to make it burn with less soot." Song Shaoqin continued to encourage his subordinates.

Although coal cannot reach the most perfect smoke-free level at present, it itself is processed to follow the route of the common people, and the target group is the poor people who do not have too many warm clothes in winter.

This coal does have some drawbacks, but it is much more resistant to burning than charcoal.

As for the briquettes, this thing is also called honeycomb coal in modern times, and it can be used for merchants doing business and large households in the middle and high-level stages, after all, with this briquette, there is no need to bother to pile up firewood, and it is not too convenient to use.

"Yes, Second Master."

Cao Tianrong and the others responded in unison, and accepted the new task very simply, which was also a challenge for them, and through this period of contact and cognition, they now have a great interest in this coal.

I heard that the most popular and simple use of this coal mine is to make coal and briquettes, and it has many uses and functions, and even has a very amazing effect.

Of course, they also heard about these from the second master, but they can't imagine what kind of amazing method it is, but their hearts are full of expectations and desire to explore.

For an afternoon, Song Shaoqin spent all his time in the coal mine, not only visiting each production link, but also discussing and doing research with Mai Dong.

It wasn't until the evening that he returned to the Song family's compound in black.

"Oops~ Shaoqin, what are you doing here? How did it get like this? ”

Xu Wanqing was washing her son's little hands in the yard, and as soon as she looked up, she looked at the second brother who had always been beautiful, and walked in in black, it was the first time she had seen such a dirty image.

"The second uncle has become a big black egg~"

Brother Cheng looked at the dark second uncle, pouted slightly, and instantly covered his small mouth and snickered.

There is a child in the village who is not only black, but even his clothes are always black, so the children in the village call him a black egg, and now there is a big black egg.

Song Jingze, who came out of the movement when he heard the movement, immediately laughed mercilessly, "Hahaha~ Second brother, you also have this time, did you go into the coal mine to pick up ashes?" Why is there black soot all over my body? ”

Song Shaoqin swept over with cold eyes, "Isn't it funny?" ”

Isn't it just that his clothes, face and hands are stained with soot, and he walks around the coal mining area, there is coal everywhere, and it is not normal to get contaminated.

He made a temporary trip up the mountain to inspect the results, and he did not change into suitable overalls, and it was difficult for his robe not to be stained with soot.