When Su Xun heard this, he couldn't help but be startled. Wasn't he talking to him about fertilizer production? Why did it suddenly get involved in the coal mine?
But Su Xun did not hesitate, shook his head slightly and said: "Back to Your Highness, I have not heard that there are coal fields around Kunyang. I wonder why Your Highness asked?"
Ask why? Of course I have to make fertilizer myself.
Because in the process of refining coal into coking coal, a large amount of ammonia will be produced. This is because the coal itself contains certain nitrogen-containing heterocycles. During the coking process, these nitrogen elements will be released in the form of ammonia and mixed with In the coke oven gas, adsorption media is used to collect the ammonia gas, and after a little processing, it becomes nitrogen fertilizer.
This method is not difficult, and the raw materials required are also very simple. As long as you have an unlimited source of coal to continuously refine coking coal, you can produce a large amount of nitrogen fertilizer.
The most important thing is that the nitrogen fertilizer produced by this method is obviously much higher in purity and efficiency than the manure and urine fertilizers made before.
And there is a very important point, that is, the coking coal that is refined at the same time will have more uses in the future.
You must know that the highest temperature that ordinary charcoal can provide is only 1300 degrees, while the temperature caused by coking coal combustion can easily reach 1800 degrees. At such a temperature, if you develop smelting technology in the future, you will get twice the result with half the effort.
However, since there is no coal available now, this idea can only be shelved for the time being.
However, Li Ke secretly thought that he still had to find a coal mine as soon as possible. After all, this was related to the success of his future development of metallurgy.
Steelmaking is the only way for Li Ke to develop in the future. After all, Li Ke will build his own armed force in the future. By then, whether it is armor or weapons, he will need a lot of steel. If he plans to develop industry, he will need Steel is an astronomical figure.
However, Li Ke also knew very well that he was just starting out and could not eat a fat man in one bite. Now that he was broke, he could only take one step at a time.
The next three days were the most comfortable three days that Li Ke had lived since he traveled to the Wei Dynasty, because it finally rained.
The high temperature and drought that lasted for more than a month had already tortured Li Ke to exhaustion.
But now the rain has taken away the high temperature, which not only makes Li Ke feel more comfortable, but also completely alleviates the drought in Kunyang.
While Li Ke was enjoying this rare and comfortable time, a young eunuch hurried in from outside and brought bad news to Li Ke.
"Your Highness is in trouble. Because of the heavy rain for days, a large area of the southeastern city wall suddenly collapsed!"
Hearing this, Li Ke's heart suddenly jumped up.
In fact, in the past few days, he had already received a report from Qi Rusong, saying that several groups of Khitan reconnaissance cavalry had been discovered near Kunyang. It was possible that the Khitan was going to make some small moves recently.
And now that the city wall suddenly collapsed, wouldn't this provide the Khitans with an excellent opportunity to invade?
Agricultural civilization mainly relied on solid cities and advanced defensive weapons to deal with the invasion and harassment of nomads.
Now that the enemy has not invaded, his own barrier has disappeared. If the Khitans seize the opportunity to launch a surprise attack, I am afraid that they will die without a burial place.
Without any time to think, Li Ke immediately put on his clothes, asked the young eunuch to lead the way, and went out on horseback to ride straight to the southeast of Kunyang.
When Li Ke rushed to the place where the city wall collapsed, he found that the place was already crowded with people, including people watching the excitement, and more of them were government officials and garrison soldiers at the government office.
Li Ke saw that Su Xun and Qi Rusong were also there, but their expressions were extremely gloomy, and they seemed to be discussing something.
Almost at the same time, the two also discovered Li Ke and walked over quickly.
"Your Highness..."
"I have met His Highness."
Li Ke just nodded in response, and then moved forward to see how serious the collapse of the city wall was.
But at one glance, Li Ke took a deep breath.
Because he saw that the city wall suddenly collapsed with a gap of more than 20 meters.
With such a big gap, even the cavalry can easily penetrate.
"This city wall is fine, why did it suddenly collapse?" Li Ke looked at Qi Rusong aside with a worried face and asked.
Qi Rusong just shook his head helplessly and replied: "It has been in disrepair for a long time, and coupled with the constant harassment by the Khitans in recent years, the city wall has actually been overwhelmed. The heavy rain for three consecutive days directly destroyed the city wall."
After a pause, Qi Rusong hurriedly added: "Now the city wall must be repaired as soon as possible. Khitan scouts have been wandering nearby in recent days. If the city wall collapses, it will inevitably lead to an attack by the army. Then the situation will be dire. It’s even more critical!”
However, as soon as Qi Rusong finished speaking, Su Xun on the side said: "Hey, it is not easy to repair the city wall in a short time. Calculating the length of the collapse, if you want to completely repair it and make the quality the same as before, It will take at least two months."
"Two months is too long! The Khitans will not give us that long." Qi Rusong shook his head and said, "Isn't there a faster way?"
"No." Su Xun spread his hands and said helplessly, "Since ancient times, building a city has not been a matter of quick success. If you want the city wall to be unbreakable, you must give it enough time."
Things seemed to have reached a deadlock all of a sudden.
Qi Rusong looked at the collapsed city wall anxiously, and suddenly felt a lot of pressure.
Now Kunyang's defenders are already scarce, and now the city wall has collapsed again and will not be repaired for a while.
At this time, these soldiers and the people of Kunyang were simply lambs that the Khitans could cook at any time.
It seems that Kunyang cannot escape this disaster.
Qi Rusong was thinking when he suddenly saw Li Ke passing over him and walking onto the collapsed city wall. After a moment, he slowly said to him and Su Xun: "Perhaps, I have a way to repair the city wall in the shortest time." stand up."
