Liu Mu also explained: "Sage, once this furnace is opened, it will never stop, constantly pouring molten iron, taking slag and then adding materials, and the craftsmen are changing shifts every three hours, and four liners are turning over every day. This furnace is a trial production, a small furnace, and a larger furnace is improved according to the effect www.biquge.info of this furnace. ”

Li Dejian and Liu Mu's report made Li Yuan very satisfied.

This is already very powerful, and it can produce 3,500 catties of iron every day.

Then a year is more than 1.2 million catties, that is, 12,000 stones, which has exceeded half of the output of Datang iron, and if you build a few more furnaces, it will reach 100,000 stones as Liu Mu said.

"Sage, this one needs to be overhauled. My idea was that the molten iron would go directly to another furnace to produce the flex steel. ”

The soft steel that Yanagi said is wrought iron.

"Is it hard?"

"If you go back to the saints, it's very difficult, the molten iron melts so hot that once you touch someone, it's all melted. The process of this converter is being discussed by the craftsmen and is expected to be resolved within a month. ”

Li Yuan turned his head sideways and said to Peng Hai: "Tell me to go down and reward it." ”

"Yes." Peng Hai should be down.

The second furnace is actually to throw these pig iron bars that have turned dark red and have temperature into it for re-refining. The process on Datang's side has willow coke that can burn iron into liquid, which is much easier than the previous pure forging.

Previously, the pig iron was heated until it almost melted, and this can be done with charcoal.

Charcoal can produce a limited temperature, but coke can.

Li Yuan took off his silk clothes and put on an asbestos coat, and then stood in the distance and watched the process very quietly.

The second workshop is the converter, which can only refine less than 100 catties of iron at a time, and dozens of hardcover men are constantly stepping on the bellows, which is not to heat the coke but to blow clean air from the outside into the furnace.

Yanagi doesn't have the ability to blow oxygen, but he has to keep blowing in clean and misty air.

After several small converters continued to work, the first furnace of flex steel was finally produced.

When it came to the last workshop, the person who carried the iron bar put the iron bar at the door, and the person inside was responsible for transporting it in, and Li Dejian walked to the door and stopped.

Liu Mu said: "Dejian, you are already an official of the Ministry of Works, and you have the right to come in here." ”

"If there is steel directly, I will reward it heavily." Li Yuan also added.

The inside of this house is much cleaner than the outside, and there are all the best blacksmiths here, but without exception, they are all the standard of slaves, they are blacksmiths who were demoted to slaves after defeating Wang Shichong.

Here, they are still slaves, but each person has a pound of meat to eat every day.

"Sage, the method of frying steel has existed since the Han Dynasty, and it is made by repeated forging. The second step of refining outside replaces this step, and there are almost no impurities in this iron. This third step is called willow wood frying steel method. ”

When the name of the willow wood frying steel method was mentioned, the willow wood blushed on his face.

Li Yuan felt that something was wrong, because Liu Mu invented this method, and it was not wrong to call Liu Mu to fry steel.

Yanagi explained: "The saint is not named after himself, but in this last step, the willow stick is used to fry the steel, and then it is forged into steel. It is the stick of the willow tree, the willow wood, not the willow wood of the willow tree. ”

After listening to Liu Mu's words like tongue twisters, Li Yuan laughed: "Okay, I give the name of Liu Mu Frying Steel Method, and immediately fry it for me to see." ”

Datang Li Yuan had been standing for a full hour and a half, but he still didn't feel tired at this time, and asked to watch the whole process.

Almost pure pure iron, coupled with the stir-fry of wooden strips, quickly poured out is red molten steel.

Three groups of blacksmiths stepped forward, picked up their sledgehammers and began to forge them.

They were all skilled people, and a quarter of an hour later, a Tang horizontal knife with smooth fine lines appeared. A master-level blacksmith stepped forward and beat with a small hammer. In another quarter of an hour, after the red blade was on fire in the water, the two apprentices began to sharpen it.

That is, in an hour's time, a newly beaten Tang knife was held in front of the Tang Emperor Li Yuan by Yao Dejian's hands.

Li Yuan looked at the knife and turned his head and asked Liu Mu: "Those who are guarding outside, I think they are all clever warriors." ”

"Saint, this place is unknown. Guarding outside is Chai Shao's servant who grew up together since he was a child and practiced martial arts together, named Chai Hong and his subordinates. Willow reported.

"Call him in." Liu Mu heard the order and called Chai Hong in outside.

Chai Hong knelt down on one knee in front of Li Yuan: "Please command, sage." ”

"Are you extraordinary?" Li Yuan asked.

"Chai Hong doesn't dare to claim that his martial arts are extraordinary, he has trained for Lu Guogong in Hengzhou, and he can support fifty moves without defeat."

Li Yuanxin said that he could be undefeated in fifty moves under Cheng Zhijie, and he could be regarded as a master.

"Look at this blade, try it for me, I'll wait."

"Yes." Chai Hong took the knife with both hands and walked aside, some people helped to load the knife handle, some people brought fine wooden pillars, and some people brought very tight rolled mats.

Chai Hong tried his feelings, practiced a set of knife techniques, and then after lightly slashing twice on the wooden pillar, he came to Li Yuan with the knife in both hands.

"Sage, the feeling in your hand is better than that of an iron knife, but the feeling on the blade is not good, and the blade is a little rougher. The durability is definitely higher than the knives equipped in the army now, and the iron knife can't cut this one. Chai Hong made a judgment on the knife based on his own experience.

The craftsman in charge of the knife over there immediately flew over and knelt on the ground: "Xiaomin, Xiaomin." ”

When he heard that his sword was not good, his frightened soul flew away.

Liu Mu saluted Li Yuan, and after Li Yuan nodded, Liu Mu went over and said, "Don't be nervous, let you explain." ”

"Yes, yes. It's just a test of a knife with molten iron. But I don't know how to make a good knife, so there is only a knife shape but no knife soul, the blade has not been re-exercised with iron powder, and the blade has not been blistered with yellow alum water before making a knife pattern. The small people are at fault, and the small people are at fault. ”

"You're right, that's what I'm looking for. I ask you, is this directly poured molten iron molten steel? How much is the difference with 100 steel? Li Yuan asked in a gentle tone.

When it comes to professional issues, this blacksmith is a true professional.

"Reply, reply. This is already very close to 100 steel, Xiaomin thinks that we are proficient, and after changing the furnace, we can surpass 100 steel. But, but ...... But the process is too complicated, and it takes at least dozens of tries to make a little bit of improvement. The craftsman stammered nervously.

Liu Mu asked himself in front of Li Yuan.

After getting Li Yuan's consent, Liu Mu said to the craftsman: "You don't have to be nervous, it is a great achievement to be able to make 100 steels by making iron three times in three years." Now we have done a good job of the craftsmanship of soft steel, and if we can make crude steel, we will prepare 5,000 pairs of horseshoes in 20 days, and train 100 people who can make horseshoe nails, and I will arrange a mother-in-law for you. ”