charcoal!

Charcoal is a dark brown or black porous solid fuel that remains when wood or wood raw materials are incompletely burned or pyrolyzed under air isolation conditions.

From bronzes in the Shang Dynasty to the smelting of iron in the Spring and Autumn Period and the Warring States Period, charcoal is used to use its hygroscopicity to observe climate change, etc.

The firing of charcoal is very simple. There are roughly two methods. One is the kiln firing method. Build a kiln with soil, fill it with wood, and burn it from the kiln door or fire door, so that the wood is charred in the kiln, and volatiles escape and the remaining charcoal is left.

The second type is dry distillation method, that is, wood distillation. According to the method of extinguishing the fire of the kiln, there are two types: black charcoal and white charcoal.

Although it is easy to cook, it is difficult to make charcoal. The rate of charcoal is too low. Most of them are six to one, or even ten to one. Moreover, in autumn, the grass and trees fall yellow, so the firewood is cut into charcoal.

From this we can see that if you want to burn charcoal, you have to wait until autumn.

This naturally leads to the lack of charcoal fire among the people and even the palace. If there is coal to replace it, according to Ying Zheng, the coal mine in Pingcheng is very large.

If so, this will be a huge change for the Qin Empire.

The reason why Ying Zheng insisted on developing Yanmen County was because he learned from Li Kang's memory that Pingcheng Coal Mine, which is the Datong Coal Mine in later generations, was the largest coal mine in China.

It has large reserves, many coal seams can be mined, with an average thickness of 30 to 40 meters. It has low ash content, few sulfur and phosphorus impurities, high calorific value, and stable coal seams and easy to mine.

For Ying Zheng at this moment, the most important thing is that it is close to Xianyang, the capital of the Great Qin Empire, and it is also less impurities and is easy to mine. At this stage, the Great Qin Empire has not yet entered the Iron Age, so naturally it can only mine easily.

Moreover, the Pingcheng coal mine veins were mined in later history. Ying Zheng learned from Li Kang's memory that Li Daoyuan wrote in the Northern Wei Dynasty to record the spontaneous combustion of coal seams and the development and utilization of coal in Pingcheng area in writing.

By the Song Dynasty, coal was widely used as fuel in metallurgy, ceramics and other industries, and the status of coal in the social economy became increasingly important, and coal in Pingcheng area had been widely burned.

During the Liao, Jin and Yuan dynasties, the coal mining industry in Pingcheng area was already very developed, and the iron smelting industry has lasted for a long time, which promoted the development of the coal mining industry.

Until the Ming and Qing dynasties, coal in Pingcheng had been widely used in iron smelting, coin casting, sulfur refining, lime, bricks, ceramics, wine making, pharmaceuticals, black alum refining, etc.

These information in Li Kang's memory made Ying Zheng decide at the first time. He knew in his heart that the current Qin Empire could only mine the simplest mineral veins.

At the same time, this is also the reason why Ying Zheng set the mining of the first coal mine in the Great Qin Empire in Pingcheng.

The coal mines here do not require later technology and can be mined with manpower. Moreover, the coal mines in Pingcheng are large reserves, which are enough to satisfy the Qin Empire.

The most important thing is that Pingcheng has a special geographical location, which can be used to transport coal to the maximum extent and enter Xianyang, and then transport it through the northeastern Longxi tunnel, the east sea channel of Sanchuan, the Guangyang Road of Henoi, the Nanyang Nanjun Road of Nanjun Road, and the Kuaiji Road of western Liaoning.

In this way, the five major roads of the empire can be completely activated. Once the future is in the future, a charging point can be established and merchant vehicles can be charged. In this way, the repair of the five major roads will no longer need to pay money from the imperial treasury.

As the king of a country, you must consider it carefully. The development of Yanmen County was Ying Zheng’s decision after thinking about it. Of course, the development of Yanmen County is definitely not just a coal mine.

Things such as land reclamation and road construction in Yanmen County must be put on the agenda.

When talking about road construction, Ying Zheng remembered cement. If the cement was made out and the road paved would be extremely durable.

However, Ying Zheng has not yet found the firing of cement in Li Kang's memory. Even if he wanted to remind Shanggongfang, he would be powerless.

This matter can only be delayed again and again to see if it is possible in the future, or in other words, Shanggongfang has developed it by itself.

As soon as he thought of this, Ying Zheng quickly suppressed the random thoughts in his heart. He knew in his heart that if this continued, he would think about it for a day and it would not end.

"Left Prime Minister, I summoned you this time to mention the development of Yanmen County. After going down, the State Government Office will send someone to Yanmen County to go to the countryside with the governor of Yanmen County to learn more about it, and then formulate a development plan for Yanmen County."

"promise."

Seeing Ying Zheng attaching so much importance, Wang Wan nodded: "Don't worry, Your Majesty, I will go here in person to ensure that there is no accident!"

At this moment, Ying Zheng looked at Wang Wan with a look of a torch and said, "Let Xiao He go, you are still in Xianyang. If you are not here, Li Si is far away in the Three Jins. I'm afraid Xiao He and Xiang can't handle it."

"Old minister understand!"

Ying Zheng was very confident in Wang Wan's ability. After all, he had been in charge of the Qin Empire for many years and had already gained experience in some things.

At this stage, although the Qin Dynasty needs to change, the basic market should still be based on stability.

...

Wang Wan left the study and Ying Zheng walked into the bedroom. He was a little tired and needed a rest.

Nowadays, the decision-making of the Great Qin Empire cannot be negligent. He is the most critical emperor and must accumulate strength. Only in this way can he make the smartest decision.

...

Doctoral Academic.

Although the Doctoral Academy is no longer qualified to participate in politics and make decisions, they are still an official office and an official office responsible for history writing.

Since Chunyu Yue was killed by the horse thief, Confucians have temporarily stabilized.

"Brother Fu, when will our day be the end? Now, people in the world have long forgotten us!" Mao Jiao's eyes were deep, and he was obviously not satisfied with the current situation.

He came to Daqin to make a name for himself, rather than studying history in obscurity.

"Now Your Majesty is pushing the remnants of the six countries, the Central Plains are determined, and the land reform has reached the land of the Three Jins. If we are not aware of the qualities, the next one will be the people of the qualities and the qualities."

Shusun Tong shook his head, and it seemed that he was just plain, but the mockery in his tone was too obvious.

In Shusun Tong's view, the reason why the Office of the Doctorate Palace has fallen into its current situation is simply because Mao Jiao, Chunyu Yue and others are committed to death.

After all, Emperor Ying Zheng of the First Emperor has always treated them very well, and even pointed at meritorious generals in the court, the Qin Dynasty and the people would not fight back.

However, Chunyu Yue and others wanted too much, but they met a peerless and powerful emperor. Now most of them can live, which is the kindness of the First Emperor.

As a result, at this time, people are still unwilling to accept it and want more power. Faced with a domineering emperor like the First Emperor, they are really not afraid of being doomed.
Chapter completed!