The issue of papermaking was of great importance. Not only did Li Mengxi believe that the sooner he could break through the difficulties of papermaking, the better. Guan Yu, a martial artist, was also extremely concerned about papermaking.

Just after lunch, Li Mengxi sent his younger brother Xiaozhuan to class. After returning, Li Mengxi and Guan Yu had a discussion to clarify the division of labor.

Li Mengxi went to summon the craftsmen.

There are many craftsmen in the army, but Li Mengxi is the most skilled.

Guan Yu went to look for iron tools.

To make a pressure cooker, you naturally have to forge iron and find enough iron materials.

Li Mengxi went to find the craftsmen and directly found where the blacksmiths were. Then he said hello, and a large number of strong blacksmiths followed him.

Li Mengxi knew a little about what blacksmithing required, but he didn't know it completely, so he still seriously asked the blacksmiths for advice.

The blacksmiths said that they need an anvil, a hammer for making iron, pliers, a chisel for hammer holes, a set of grinding tools, a bellows, and an iron-smelting furnace.

Li Mengxi immediately scratched his head.

There are no anvils in the army either.

"Which of you has a hammer for making iron?" Li Mengxi asked the craftsmen.

Li Mengxi originally thought that the craftsmen were all empty-handed and had long forgotten their blacksmithing tools, so he planned to go to the carpenter's camp to borrow a few small hammers to use them.

As a result, quite a few craftsmen said that the hammer was in the tent and they should go back and get it.

Only then did Li Mengxi realize that those who dared to fight and fight would be refugees, and the craftsmen would take their eating utensils with them.

Even if they become yellow turbans or refugees, these blacksmiths still hide their hammers well when it comes to hammers that are so heavy.

There is no shortage of hammers for blacksmithing.

There are also fire pliers, which are fixed tools that hold iron blanks. They are important auxiliary tools. There is no shortage of fire pliers.

There is no shortage of chisels for hammer holes, as well as knives for polishing.

Bellows, this thing. Li Mengxi was sure that there was no bellows in the whole army.

Although there is no bellows, there are many carpenters in the army and there is no shortage of wood. It is not difficult to make a bellows, and one can be made in a day.

Only the iron smelting furnace and anvil are difficult to solve.

But just a brief inference, the iron smelting technology of the Han Dynasty is extremely developed and popular. There are government iron smelting workshops all over the world. Julu City is the capital of Julu County. There is no need to guess. There must be iron smelting furnaces and iron smelting furnaces in Julu City.

Things like anvils are not possible, but definitely exist.

Li Mengxi thought about the layout of Julu City again, but after thinking about it, where is the iron workshop? Where is it?

Is it because I haven't figured it out yet?

With doubts, Li Mengxi went to find the iron workshop and anvil.

Soon, the soldier responsible for searching came back and said he had found it.

When Li Mengxi went to the ground and saw, he was a little dumbfounded. The iron smelting workshop and the iron smelting furnace were all destroyed. It was a pile of ruins, no different from other ruins.

Looking around the original site of the ironworks workshop, Li Mengxi saw, as expected, a vast area of ​​foundations, which were different in size from ordinary residential buildings. The foundations of the ironworks workshop were very regular and neat, and looked like government land.

Who was so heartless that he smashed up the ironworks and the ironmaking furnace?

At the site of the iron-making furnace, Li Mengxi clearly saw broken clay that burned red, all over the ground.

The broken base of the iron-making blast furnace is very large, as big as a factory chimney. Twenty people might not be able to hug it. You can imagine how big the iron-making blast furnace must be when it is intact.

But now, everything is ruined.

Li Mengxi can probably guess why the iron-smelting furnace was destroyed. Almost all the buildings in the city were destroyed. This was probably when Zhang Jiao was defending Julu City. When the city was in emergency and there was no defense materials, the Yellow Turban Army smashed the iron-smelting furnace.

, transporting earthworks to defend the city.

The city was indeed defended, but the city became dilapidated.

Without the iron-smelting furnace, we had to build another one.

Regarding the iron smelting technology of the Han Dynasty, history textbooks say that the blast furnace iron smelting technology was invented in the Han Dynasty, and iron production was greatly increased.

Li Mengxi looked at the huge broken furnace in front of him, and he knew in his heart that the broken furnace in front of him was the legendary blast furnace.

I asked the blacksmiths if anyone knew how to build a furnace. Fortunately, someone knew how to build a blast furnace.

The current situation in the Israeli military is that there is no stable source of iron ore, and there is no possibility of refining large quantities of iron tools in the short term. Therefore, only a small furnace for researching technology is enough, and there is no need to build a large one.

Li Mengxi discovered that the ground under the ruins at the site of the ironworks was very smooth and solid, so he decided to build the ironmaking furnace at the site of the ironworks.

The blacksmiths were left busy, preparing to move the rubble all over the ground to make some open space.

Li Mengxi went to find the craftsmen from the construction team again. The craftsmen from the construction team came over to help carrying shovels, hoes, wooden buckets and water.

While a group of craftsmen were busy building iron smelting furnaces, Li Mengxi was busy with the logistical matters of the craftsmen.

It was necessary to build a small temporary ironmaking workshop in the ironmaking workshop. There was no house in the ironmaking workshop, it was snowing, and bricks, earth and wood were needed to build the house, so we could only hastily mix some cloth and let the women and children

The women in the camp temporarily sewed a huge linen tent roof to serve as a work shed.

When the craftsmen dug out the yellow mud with difficulty, built a small iron-making furnace with a height of one and a half people, and used firewood to burn the iron-making furnace. After this work was completed, it was almost evening.

Guan Yu moved all the iron tools he could find in his army, such as broken knives, broken spears, and some badly worn arrowheads, into large baskets full of iron tools.

Soon, it got dark.

After being busy all day, the preparations for iron-making have not yet been completed.

The next day is the 18th day of the twelfth lunar month.

The next day, the iron furnace was completed.

At this time, a craftsman came over and told Li Mengxi that he needed charcoal.

Li Mengxi was almost irritable at that time. He thought to himself that if he wanted charcoal, he didn't tell him yesterday. If he said it yesterday, he would prepare it together. Why waste another day?

Li Mengxi endured it. After calming down, Li Mengxi rewarded the craftsman who gave his opinion.

The fact that the craftsman did not mention charcoal yesterday was not due to negligence on the part of the craftsman. On the contrary, when the craftsman mentioned charcoal today, it was the craftsman’s suggestion that merited it.

The reason why the craftsmen took the initiative to come here is because of the reward system in the army. Craftsmen in the army all know that if they can provide a useful suggestion, they will be rewarded, so the craftsmen came here specially.

This chapter is not over yet, please click on the next page to continue reading! As for why no one mentioned charcoal yesterday, it may be that the craftsmen did not pay attention yesterday and thought there was charcoal. However, when they saw it today, there was no charcoal, so they mentioned it today.

come out.

Ironmaking requires charcoal, and Li Mengxi roughly knows the principle. The burning temperature of charcoal is higher than that of firewood, and it is easier to melt iron ore, so charcoal is used.

What makes Li Mengxi curious is how carpenters make carbon.

I saw that the process of making charcoal required craftsmen to use yellow mud to build a huge tomb. What Li Mengxi thought was a tomb was actually a charcoal kiln.

During the construction process of the charcoal kiln, Li Mengxi saw many familiar construction techniques, such as arching and mold shaping.

The purpose of building the charcoal kiln in an arched shape is to increase the strength and make the arch less likely to collapse.

The most curious part about Li Mengxi's charcoal burning was that the craftsmen first filled half the kiln's worth of dry firewood into the kiln, and then lit the fire. When the kiln was full of firewood, they sealed the kiln mouth with mud.

Li Mengxi suddenly wondered, if the kiln is so sealed, there will be no oxygen in the kiln after a while, and the fire will be extinguished in a short time.

Then very quickly, after being confused for a long time, Li Mengxi suddenly realized.

No wonder some craftsmen say stuffy charcoal. The principle of making charcoal is to turn wood into charcoal in a high-temperature, high-pressure, oxygen-free environment.

Therefore, first light the firewood in the kiln, and when it is half-burned, seal the chisel. Then, the remaining oxygen in the kiln will continue to burn for a while, and because the kiln mouth has been sealed, the kiln will

The fire continued to burn, which caused the temperature in the kiln to rise rapidly and the air in the kiln to expand rapidly. In an instant, the kiln became an extreme environment of high temperature, high pressure and isolation from the air.

It is said that diamonds are formed from carbon in an extremely high temperature, high pressure and oxygen-isolated environment.

The principle of turning wood into charcoal is actually similar to the principle of diamond formation. It is a change that occurs under high temperature and high pressure. Without oxygen, if oxygen is added to the high temperature, the charcoal will burn directly into ashes.

Therefore, burning charcoal is actually boring charcoal.

The word "sultry" means no combustion, high temperature and high pressure.
Chapter completed!