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Walk out of the rattan armor weaving camp. Lu Shi took Wang Xiao to the blacksmith shop behind the mountain non-stop. When Lu Shi came to the camp of the artisan camp. The artisan camp is now filled with fireworks. Running all night in full swing.

The artisan camp behind the mountain is an old-fashioned handicraft workshop from the original. A few hammers. A flood furnace. Dozens of blacksmith veterans. There is not a single bit of advanced tooling technology in sight. The only thing that has changed is according to Chunlan's meaning. There are a lot of men in their forties who are still strong. Sweaty wheels with sledgehammers clanging hard.

When I found Zhao Blacksmith. The captain was like a smoky King Kong, with only white fangs left. I couldn't help but be stunned when I saw the military division coming to the shed. hurriedly threw down the work in his hand and ran up to salute the military advisor. Respect comes from the bottom of my heart.

In the 5,000-year history of China. The literati and doctors despised the craftsmen and thought that they were the end of all their professions. There is no shame in meeting it. They will not come to the artisan's hut in person. I didn't expect that the military advisor, a representative of the literati, would put down his body and come to this lowly place full of fireworks. The mood is very excited. At the time of the ceremony, he fell on his knees according to the original rules. But Lu Shi immediately stepped forward to help him up. chuckled and said strangely; "Brother Zhao doesn't know anything. We've already talked about you and my brother. Inherently equal. Your skills are more dependent on us. If that's the case, isn't it time for me to see you again. I'll bow down to you first. It's good for our brother to give it up."

Blacksmith Zhao blushed when he heard this. The honest Na Na doesn't know what to say.

Respect and care for military advisors are the pride and motivation of their own beings. I was once told by my military advisor to be an example in front of my brothers. But I forgot about it. Hurriedly stood up and crossed his hand; "I don't know what guidance the military advisor can have."

It's just a polite way to say that. In this day and age. The literati boast that they have hills and valleys in their chests, and they point out the country while talking and laughing. But it's useless. Especially when it comes to craftsmanship, it's even more dismissive of it. Think that the hundred crafts are nothing but strange tricks and tricks, and they are unsightly. But the military division has been different from others. I don't underestimate myself and give myself great respect. He is also commensurate with his own brothers. That's the great care of where to expect anything else. This statement is nothing more than a statement of respect.

Lu Shi said with a smile; "I don't disturb Captain Zhao's work. Just take a look at the progress of building a prick. Now military training is in full swing. I'm afraid that I will delay the equipment and training of the gun. I don't know how Captain Zhao's work is progressing now. But what else is needed?"

Blacksmith Zhao said with a red face; "So that the advisor may know. Subordinates are incompetent. It's going very slowly. But I'm waiting to work day and night. Master Wanwang forgives you." Say it and be ashamed to give a deep salute. Thought it was reparation.

Looking at Blacksmith Zhao's sunken eyes and blackened face, Lu Shishen was deeply pity. Hurriedly picked up Blacksmith Zhao with his hand and smiled; "Captain Zhao, don't blame yourself too much. Things have to be gradual. I still know the truth that can't be pouted at once. Take me to see how well everyone is doing."

Blacksmith Zhao immediately said; "It's time for the military advisor to instruct. Advisor, please allow me to lead the way."

Lu Shi and Blacksmith Zhao walked into the spark-strewn shed. But I saw an open oven full of charcoal. A master blacksmith is instructing those helpers. Hammer and forge bare-chested in the winter. A hammer down is a handful of sparks. The shed was dazzling and bright. During this period, Blacksmith Zhao continued to explain the various process processes to the military advisor. But after Lu Shi walked around, he had a question in his heart for a long time. After the tour, go outside the shed to drink water and rest. Lu Shi asked Blacksmith Zhao his own questions.

"Captain Zhao. I watched the whole process. But I don't know anything, please Captain Zhao to solve my doubts." Lu Shi's humble way.

Blacksmith Zhao owes his body; "Knowing everything. Please ask the military advisor."

"I found that now we use charcoal fires. Why don't we use coke?"

Blacksmith Zhao thought that the military advisor would ask what kind of difficult question. See that is such a simple question not by Min Er.

A scribe is a scribe. I don't know all kinds of work. This basic question is also asked solemnly. But he didn't dare to slack off, and hurriedly explained to the military advisor; "I don't know what coke is in the mouth of a military advisor. Please show me the military advisor."

"Oh. That's it. Then Captain Zhao knows about coal. There must be a lot of mountains in this place."

Zhao blacksmith heard that it was coal. Then he suddenly realized, "I know this. The military advisor is talking about peat, which we call every day." Wait for the military division to give a positive reply. Then he frowned; "The military advisor doesn't know. We also know that peat is harder and longer-lasting than charcoal. But there is one thing that peat cannot compare to charcoal. That is, the iron forged by peat is more brittle than the iron forged by charcoal. And multi-cell. Weapons are naturally prone to breakage. That's why our ancestors have chosen charcoal for generations. That's why there's no way to increase production."

At this time, Lu Shi knew that it was difficult to make iron. In fact, at the end of the Ming Dynasty, there was already a world-leading steelmaking technology. But not massively popular. The bottleneck is in the smelting of pig iron and wrought iron.

There are very few records of steelmaking before the Song Dynasty, and after the Song Dynasty, at least three different types of processes can be found in the book.

The first is the pig iron trapping method. Shen Kuo Mengxi pen talks about the three clouds: "The so-called iron and steel in the world are bent with soft iron, but they are trapped in the middle of it with pig iron and sealed in mud. Forging orders are into, which is called group steel, and is also called steel filling."

The second is the pig iron mulching method. This operation is a step forward from the pig iron trapping method: the pig iron is placed on the "wrought iron", and after melting, it seeps downward, which increases the chance of contact reaction between the raw and "wrought" iron, and reduces the probability of pig iron loss. There is no need to seal the mud, but the upper cover is broken with grass and the bottom is coated with mud, which simplifies the operation." "Wrought iron" is flaked, which increases the reaction surface and improves productivity.

The third is the pig iron pouring method. About was founded in the middle of the Ming Dynasty, in the Qing Dynasty in Wuhu, Anhui, Xiangtan, Hunan and other places are more prosperous, because it is said that Jiangsu craftsmen founded, also known as "Suzhou Steel".

Nowadays, the reason why coal is not used instead of charcoal fire is that Chinese coal has high sulfur content. During calcination, sulfur is added to the iron to make the iron brittle. Can't be made into steel. China's biggest example of failure is the Hanyang Iron and Steel Plant in the late fine weather. The investment is huge but there is no qualified steel. In the end, it had to go out of business.

Now the rice fat captured in the First World War is known as fine iron. But it's still in the category of wrought iron. But it's not steel. It takes a lot of effort to build a spear. Not to mention the more demanding weapon of the sabre.

Lu Shi thought about his superficial knowledge of physics, as well as the drunkards who had seen it, and said in the text. I have a way to increase production and reduce labor. I don't know if Master Zhao thinks it's feasible."

The blacksmith was taken aback. I didn't think that a military advisor could also dabble in his own iron-making skills. It is really unseemly. But I don't know how skilled the military division is. Don't draw a tiger into an anti-dog.

Lu Shi saw Blacksmith Zhao's hesitant and suspicious expression. I don't think it's weird. All the literati in this world can only recite poems and rhetoric. What's really going on there. But Lu Shi was not among them.

So Lu Shi explained in detail to Master Zhao the difference between coke, charcoal and coal. In fact, it is a desulfurization process to make coal and coke. There is no sulfur in coke when making iron. This makes the iron no longer brittle. Then improve the furnace structure to increase the furnace temperature. The furnace that Lu Shi looks at now is still an old-fashioned open furnace. When the temperature reaches 1300 degrees, it will not rise again. A key issue here is that the air inlet of the old furnace is blowing cold air. Not only can the furnace temperature not increase, but it limits the increase of the furnace temperature. So the first step is to improve here. In this way, Lu Shi squatted day and night in the craftsman camp to guide the craftsmen to make steel.

The original furnace of this iron furnace did not have time to change and used the original shaft furnace. There are three meters high. The thickness of the five measurements. Made of refractory bricks.

The first thing Lu Shi did was to order someone to raise the chimney. Then add a small stove next to it. It's lying down. This one is different from a shaft furnace. It's a structure that blacksmiths have never seen before. The middle is made of refractory bricks. Lu Shi called it a regenerator. The residual temperature of the steelmaking furnace and the peat heating are used. Heat the cold air blown out of the blower. There is also a water tower on the side of the casting trough of the open-hearth. Ask the carpenter to build the mechanism. Use the trap to control the speed of the water. It is used to cool molten iron. During this time, Lü Shi taught Zhao blacksmiths how to burn peat for coke. Let them bring people to do it. In fact, peat coking is also very simple. It's just to make a stuffy kiln. Pile up the peat inside. Then ignite and seal. Then seal the kiln mouth. For a while, smoke and dust billowed out. The sky was blackened. This is the first big polluter in the Ming Dynasty. Lu Shi also knew that in fact, this billowing smoke was also a treasure. But limited to their own knowledge and current craftsmanship, they can only watch it be abandoned in vain.

Finally wait until the blast furnace is completed. The coke has also been trained. Lu Shi ordered people to put down layers of scrap iron and coke. Lu Shi ignited. When he landed, his eyes were full of red light. Billowing smoke from the chimney into the blue sky. Blacksmith Zhao and others all know the truth of a chimney and a fire. Look at the chimney of this shaft furnace of the military division. It is estimated that even the Great Luo Golden Immortal can be refined. Wait for the fire to stabilize. Everyone knows that the method of the military advisor has been completed.

The next day, with the sound of Zhao Blacksmith, it was baked. Guys, turn on the traps. Molten iron is rolling out. When the fire shines on the sky. Red star chaotic purple smoke. Blacksmiths have been making iron for half their lives. I've never seen anything like it. This furnace. There were more than 1,000 catties of miscellaneous iron. Then push the miscellaneous iron into the small furnace. And keep adding charcoal to it. In this way, wrought iron was practiced at one time. This is the carbonization method in disguise. Although this is not good steel. But it's already considered steel. It's enough to make a saber with this. What's more, the use of wrought iron to make good steel does not need those times of forging. Greatly saving efficacy. At that time, the five bodies admired by Zhao blacksmith and others were thrown to the ground. Now I want to worship Lu Shi as a master. Lu Shibu refused. And said that time is tight now, so it is not easy to build a blast furnace. When you finish the forging of the gun, you will have time to build a furnace with a few thousand catties of good steel for the sunrise.

Thousands of pounds of good steel. What is this concept. After this time, no one suspected that it was the military advisor's nonsense. I can't wait for this.

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