PS: Thank you for the support of Emperor Jimmu and the lion of the stars!

[The following text]

After Fang De, a famous general of the border army, commanded the Wuyang army, Lin Yuyan once again fell into an embarrassing situation with nothing to do.

However, looking at Shanglin Yuan, whether it is an official or a civilian, they are all busy in full swing, and it is not good for him to be idle.

Especially when he learned that Shangshu Mansion had reached the point of forgetting to sleep and eat, Lin Yuyan was even more difficult to be lazy.

Thinking about it, Lin Yuyan set his sights on the foundry on the left bank of the Tang River.

Nowadays, this foundry, because Shanglin Yuan needs a large number of iron farming tools, the blacksmith shop is built.

Lu Feng, the original blacksmith shop in Miyang City, moved over with some people first.

The foundry director is also a very talented person, even the expert ironsmith Lu Feng came to cast the iron-striking furnace for it.

Lu Feng came over this time, and he also brought a few. Good news.

First, after more than 1,000 people and half a month of exploration, another mining point of the Miyang Iron Mine has been found, and it is buried under the surface of the earth, which is very easy to mine.

The second is that the three iron-making blast furnaces built in the iron-making base not far from the Miyang Iron Mine are already producing molten iron and forging iron embryos, and the speed is more than three times faster than usual.

Now, the Wuyang Army has sent more than 100 soldiers to organize the 2,000 subordinates who had opened the Miyang Iron Mine in advance to carry out large-scale iron smelting.

Now the task of the foundry is to cast a large number of iron farm tools, and as for the weapons of the Wuyang Army, they were pushed by Lin Yuyan to the next year.

The drawings drawn by Lin Yuyan are not complicated, and with a little pluck in the hands of a master like Lu Feng, he will be completely clear.

For example, the [bellows] drawings that Lin Yuyan took out today.

Lu Feng pondered this [bellows] for a long time before he looked at Lin Yuyan and asked, "Your Highness is saying that this kind of thing can replace the blast tube?!" ”

Lin Yuyan nodded, he also knew this pneumatic tube, it was a copper tube about several feet long, when the fire in the iron furnace was burning, it was to stretch this copper pipe into the furnace, and the person blew at the other end, so as to increase the temperature in the furnace.

However, this method is stupid and bad, and its disadvantage is that the wind power of the blast pipe is small and uneven, and it is not very beneficial to iron forging, and the other is that this thing is really not very safe, once you gasp, the hot temperature in the furnace can easily break a person's throat.

Therefore, even the master craftsman Lu Feng rarely uses this thing.

Seeing that His Royal Highness took out the drawing of this [bellows], Lu Feng was also quite curious, and immediately asked people to build one according to the words of the sixth prince.

This was followed by a hole in the existing furnace and a pipe for the bellows.

"Add to the fire!" Lu Feng instructed the craftsman to add fire to the furnace.

After a while, the fire burned the walls of the furnace red.

Lu Feng took a palm-sized piece of iron in his hand, which was a leftover material forged on weekdays, and instructed the craftsman behind the furnace to use the bellows to blow the air.

It was at the moment when the bellows sounded that Lu Feng saw the flames in the furnace quickly soaring, and a scorching temperature rushed to his face.

"Does it really work?!" Lu Feng put down the hand that covered his face because of the fire wave, and threw the slap big iron ore in his hand into it.

Lu Feng breathed, and it could be found that this was the experience of being an old craftsman, Lu Feng's breathing was extremely even, and it seemed that each breath took the same time.

One, three, three...... Seven breaths!

In just seven breaths, Lu Feng saw that the outside of the iron piece was slowly turning red, and in normal times, when it reached such a hot temperature, it would take at least twenty breaths!

Eight, nine, ten...... Twenty-six breaths!

At the twenty-sixth breath, Lu Feng stretched out the iron tongs in his hand, grabbed the burned red iron and took it out.

The reddish iron that was burned in this way was already the first time that it could be forged.

And in normal times, it would take at least nearly 100 breaths to get to this point!

There is no doubt that the [bellows] taken out by His Highness is really useful.

Throwing the red iron block caught by the pliers in his hand into the ash pool, Lu Feng asked in a deep voice, "Where is Your Highness?!" ”

A craftsman replied, "At the bronze smith's shop." ”

Lu Feng nodded, recently, he had discovered that His Royal Highness the Sixth Emperor seemed to have a special understanding of the art of casting.

At that moment, Lu Feng groaned and walked towards the bronze shop.

The bronze smith shop is in charge of a bronze craftsman named Qi Xian, and Lin Yuyan came here, naturally he didn't come in a panic.

Rather, it came for a particularly important thing.

Qi Xian asked, "What does Your Highness mean by using the template to cast small round copper plates?" ”

"Well, is it difficult?!" Lin Yuyan asked.

Qi Xian thought for a while and replied: "It's not difficult to cast a small round copper plate, but according to what His Highness said, the front and back are engraved on the front and back, and the inlays are clear, this is not easy." ”

"Can it be done?!" Lin Yuyan asked.

Qi Xian thought for a long time and said: "Your Highness, I can give it a try, but I can't be sure, if my brother is here, there must be a way!" ”

"Brother Sen?!" Lin Yuyan asked.

Qi Xian said: "My second brother, Qi Sen, is in charge of the copper smelting workshop under the rule of the right minister, by the way, Your Highness, if you write a letter to the right minister, he will definitely give you this face." ”

"Right Phase...... Ming Zifu ......" Lin Yuyan wiped the corners of his mouth, he didn't have deep contact with the three phases, but in his impression, this right minister Ming Zifu was a very good talker.

At that moment, Lin Yuyan wrote down this matter and will go back to do it later.

In this matter, a series of footsteps sounded behind him, and Lin Yuyan looked back at it, it was Lu Feng.

"Lu Feng has seen His Highness."

"Hmm......" Lin Yuyan nodded, and then asked, "The bellows experiment is over?!" ”

"Hmm," Lu Feng nodded, and then said, "As His Highness said, after using the bellows, the furnace temperature has been greatly increased!" ”

"Hmm......" Lin Yuyan nodded, he had already expected this result.

"Your Highness doesn't seem to care?" Lu Feng also asked rhetorically.

"It's just that the furnace temperature has been raised to make the iron burn red faster, so what's there to care about......" Lin Yuyan replied as well.

When Lu Feng heard this, he also sneered in his heart, insiders and outsiders saw it differently, but His Royal Highness the Sixth Emperor was the son of Emperor Wu, and it was normal for him not to know about wrought iron.

At that moment, Lu Feng couldn't help but say excitedly: "Your Highness, not only to make the iron burn red faster, Your Highness, the increase in furnace temperature is of great benefit to the wrought iron!" ”

"Oh?" Lin Yuyan looked back at Lu Feng and said, "You say yes." ”

"Wrought iron by furnace fire, two by forging, three by quenching, among them, furnace fire is the first step, but also the most important step, the best wrought iron technology in Wuguo today is seven wrought iron, and His Royal Highness is common is five wrought iron, as for the Central Plains wrought iron technology is developed, can reach more than ten wrought iron, legend Wu Yue land is even more harmful, has reached the realm of twenty wrought iron!"

"Wrought iron? What kind of doorway is this?! Lin Yuyan asked, he didn't know much about wrought iron.

Lu Feng explained: "This step of each wrought iron is to first burn the iron red, repeatedly beat to a certain extent, and then quench, this step is called [a wrought iron], each time after the wrought iron, it is weighed, if the weight is reduced, it is considered a wrought iron success, counted as a wrought iron, if there is no reduction, it can not be regarded as a wrought iron success, five wrought iron is a successful wrought iron five times, and so on, seven wrought iron, ten wrought iron, and even twenty wrought iron are the same. ”

Lu Feng paused, continued: "Every time it is forged, there are fewer impurities in this iron, correspondingly, the weapon cast is harder and harder, the most famous forged iron technology in the Central Plains is South Korea, once the border army captured the broadsword of the Korean people on the battlefield, and it has reached the realm of fifteen forging, so the world often says, [The land breaks the cattle and horses, the water intercepts the birds and geese, and when the enemy is the enemy, the iron curtain is cut into the armor] refers to the broadsword in the Korean army! ”

"Hmm......" Lin Yuyan asked, "If the furnace temperature increases, the number of forgings can be increased?!" ”

"Of course!" Lu Feng nodded heavily, and then explained: "In the past, the biggest restriction on the number of forgings was the furnace temperature, and now His Highness has taken out a sharp weapon such as a bellows, thinking that we can also reach more than ten forgings, or even twenty forgings, it seems that it is not impossible to ......."

"Then why is South Korea able to have fifteen forging skills?!" Lin Yuyan also asked, it is true that South Korea does not have such a sharp weapon as bellows.

Lu Feng thought for a while and said: "The structure of the iron furnace in South Korea seems to be different, it is very easy to gather temperature, and furthermore, the material of the primer of the Koreans is also different, and it is a thing called [Black Stone], as for what it is, the Koreans are very strict, and it has not been leaked, so it is unknown." ”

【Blackstone】

As soon as Lin Yuyan heard this name, combined with its identity as a primer material, he knew what it was......

Coal!

It should be coal, and the temperature of coal burning is indeed higher than that of wood.

Thinking of this, Lin Yuyan nodded, there must be coal mines in the territory of Wuguo, but it is unrealistic to find it in a short time, so he only wrote down the matter, and then looked at Lu Feng and asked: "What about the land of Wuyue, what about their twenty forgings?!" ”

Hearing this, Lu Feng deliberately explained: "Your Highness, I would like to make a special note that although the Han people have now found fifteen forging skills on the battlefield, it does not mean that the Han people have only mastered fifteen forging, maybe they also have twenty forging, but it is time-consuming and labor-intensive, and it cannot be used in the army on a large scale." ”

"But the land of Wu Yue is to occupy the time and place, and there are many famous craftsmen, but it is able to make the twenty forging skills applied to the army on a large scale, among which the famous generals of the Wu State are all forging iron masters, they use the fire of heaven and earth to condense the iron embryo and forge it into a tool, and the peerless sword cast by it can be cut even if it is twenty forging."

"The fire of heaven and earth?!" Lin Yuyan was surprised by this name.

"Hmm......" Lu Feng nodded and said: "Wu Yue barren mountain, every time before the rainstorm, the thunder splits into the mountain, and a pond somewhere in the mountain goes to ignite the ground fire, which can be endlessly for decades, Wu Yue's famous iron forging craftsman is using this to forge iron, and the sword he makes is beyond the reach of even the iron forging skills of the Central Plains!" ”

"Thunder and fire?!"

These five words suddenly popped up in Lin Yuyan's mind.

Lin Yuyan knew that this might be the barren mountains of Wuyue land, where there were many gas outlets or oil and gas outlets, and thunder and lightning could be ignited when they were sent to the fire, and if there was no accident, this kind of gas or oil and gas ports could burn for decades without a problem.

It seems that this wrought iron bottom fire is best with gas and oil and gas, followed by coal, and firewood is the second.

As soon as he thought of this, Lin Yuyan felt that oil and coal and other things were too far away from now, and after thinking about it, the bonus of the bellows should be able to make up for the gap with the Korean iron forging skills, at most, starting from the fire-gathering structure of the furnace, it may not be impossible to catch up with the Jin Han clan.