At this time, the trench used for casting is wide open, and the mold has already been placed on the ground, and the molten iron from the large slag is removed, and flows into the mold from the trench to cast pig iron ingots.

In a short time, two hundred pig iron ingots were cast.

Niu Dali has been completely stupid, it is said that the largest military ironworks at that time, a furnace of iron thousands of gold, but there are nearly 10,000 catties of underground place.

He pinched his thigh and said in a trembling voice, "Uncle, I'm not mistaken, right? 10,000 catties of pig iron, the largest furnace in the world, has to be refined for ten days and a half months, this is less than half a day......"

Chen Jinwang felt the corners of his eyes throbbing uncontrollably, and he didn't know if he was roasted by the hot iron ingots, or if he was excited in his heart......

If there are three or five more blast furnaces, won't the country's military iron works be surpassed?

Pig iron is sufficient, and the molten iron in the furnace is of greater use.

The craftsman closes the trench used for casting and opens the trench that leads to the iron-frying furnace, which is nested below the horizon and the molten iron flows into the iron-frying furnace, which has been burning for half an hour.

This kind of iron stir-fry stove looks like a teacup of kung fu tea, but the bottom and wall of the cup are hollow, the molten iron is contained in the cup, the coal is burned at the bottom of the cup, and the flame reflects the heat into the cup through the arched teacup wall to heat the molten iron, and then it is drawn out of the chimney.

The part of the chimney that extends from the furnace is buried under the trench where the molten iron flows, and plays the role of preheating the molten iron.

Heating the molten iron in the furnace, preheating the molten iron on the groove of the furnace, heating the air blown into the bottom combustion chamber, the flame exerts residual heat all the way, maximizes its own energy, and finally becomes a wisp of smoke and dissipates in the air......

Gu Bei looked at this thick smoke and dust, and his heart was drumming, not knowing if he would pollute Ying Tianfu into the world's first fog capital.

The fuel and molten iron are completely isolated, and coal can be used, which can be used directly dug out, which is much lower than the cost of charcoal that needs to be fired in the kiln, anyway, it is not in contact with iron, and harmful substances such as sulfur and phosphorus will not be mixed into the molten iron.

Coal can be coking, as far as Gu Bei knows, coke refining is the most authentic way, but at the moment the time is really tight, and the cost of charcoal is high.

At this time, the molten iron has been heated, and it has already shone with a bright light - it is a fine slag mixed with the molten iron......

The craftsman started the mixing equipment, and the large disc on the top of the furnace slowly rotated, driving the wrought iron rod to rotate and stir in a circle in the molten iron, and the molten iron tumbled, which was obviously a hundred times stronger than the effect of manpower.

Once the molten pig iron smelted in the blast furnace is stirred, the carbon and the oxygen in the air react violently at high temperature to produce carbon dioxide, releasing a large amount of heat.

The melting point of pig iron is lower than that of pure iron, when carbon and oxygen are combined, the carbon content in the molten iron gradually decreases, and its melting point gradually increases, so the molten iron in the iron oven gradually becomes thicker, from the clear soup to the sauce, from the sauce to the jelly......

Finally, they gathered into a very cute iron ball, which was in the shape of a molten shape.

Stopping to stir, the craftsmen picked up a ball of iron with long-nosed pliers and placed it under the hammer to beat.

With a clanging sound, the carbon in the iron mass was squeezed out, and together with the fine scum inside and the iron oxide debris on the surface, it turned into sparks in the air due to the high temperature.

There is no technical content in this forging, just to remove impurities, the process is very simple, just use pliers to clamp it and beat it casually under the forging hammer, wrought iron is very soft at high temperatures, so the shape is easy.

The so-called "wrought iron" that has been beaten is not actually wrought iron in the sense of modern textbooks. There is no such thing as raw and wrought iron in the international metallurgical community.

In the folk, pig iron is smelted directly from iron ore in a blast furnace, and "wrought iron" is smelted in an iron furnace or steel furnace.

In ancient times, ironmaking was fried steel, but the process was difficult to grasp, and the finished product was mainly iron and medium and low carbon steel, and shit could get one or two pieces of high-carbon steel - the probability was not much different from winning the lottery......

In steel products, the lower the carbon content, the softer, and the higher the carbon, the more brittle and hard.

Medium and low carbon steel is soft, and it is not sharp when used to make swords, that is, "wrought iron", and the ancients could only make ordinary iron tools such as agricultural tools. Only if the toughness, hardness, and strength of high-carbon steel meet the needs of making weapons, then it is steel......

The carbon content determines the hardness and softness of steel, so an experienced blacksmith can tell which piece is soft iron and can only make a hoe, and which piece can be good steel and can forge a sharp sword and sword......

Whether it can come out of good steel, Gu Bei doesn't know, he only understands this knowledge, but he has no practical experience, in this regard, he is not even as good as these Xia Dynasty craftsmen who have been fighting iron all their lives.

"Master, master! Come and see, this piece I'm hitting could be steel!"

A little apprentice was yelling over there, attracting all the idle people to it.

Niu Dali went over in person, picked up the piece of iron with long-beaked pliers, put it under the forging hammer and knocked it a few times, and said in a deep voice: "It's still far away, it's okay to hit a kitchen knife, but it's not possible to make a sword and a sword!"

"Oh!"

The little apprentice was slightly disappointed and replied sullenly.

Seeing this, Niu Dali stretched out his slap and slapped the back of the apprentice's head fiercely, scolding: "Hanhan, why are you so dissatisfied? Master, I have beaten iron all my life, how many pieces of steel have I seen? It's a piece of money in your hand, and it's a rare good thing!"

The apprentice next to him snickered, and the little apprentice covered the back of his head with a bitter face, and he didn't dare to speak.

At this time, Niu Dali's big apprentice shouted sullenly: "Master, come and see this piece!"

He clamped a piece of wrought iron, and struck it repeatedly under the forging hammer, and with each striking of the forging hammer, sparks flew everywhere, but no trace was left, this piece of iron was tough and hard, and it was obviously a good piece of steel!

"Forehead ......"

Niu Dali's eyes were red, he was shaking excitedly, and his voice was trembling: "Uncle, you are simply amazing...... The old man has been fighting iron all his life, but he has never seen the first furnace of fried iron fried steel, incredible!"

Regarding this question, Gu Bei didn't think so, pouted and said, "It's just a probability, how much iron did you produce in a furnace before, and how much is a furnace of iron now?" There are so many wrought irons, and the craftsmen have been sandwiched out of the iron furnace for different times, and the carbon content is more or less, and there should always be one or two pieces of good steel, which is not worth being too happy!

What you have to pay attention to is where and when the piece of iron that produces good steel is baked, and turn this probability into a technology that can be controlled! After that, you can have as much steel as you want. ”

Niu Dali was stunned for a while, and suddenly woke up, and shouted out with a "whoop", and his eyes were red with excitement!

In the past, the pig iron was hammered into pieces and put into this iron-making furnace with charcoal, and the bellows were blown from the top of the furnace.

After burning for a long time, the pig iron melts, and then take a stick and stir it until the iron. It is condensed into a ball, and finally the forging and squeezing slag are removed.

In this way, there are only more than a few dozen catties of iron at a time, and my uncle's iron furnace is directly made of molten iron from blast furnace iron, and the iron is tens of thousands of catties at a time, which is equivalent to the iron of more than 100 furnaces in the past, and one or two pieces of stainless steel are produced, which is not surprising.

Add to that the law of groping experience...... Isn't that how much steel you want?

"Who can write, hurry up and write it down for Lao Tzu......"

Niu Dali's eyes widened angrily, and the little apprentice next to him raised his hand trembling in fright: "That...... Master, I learned to write from my husband in the school, but I don't know much......"

Niu Dali slapped it over: "Criticism, if you can't write, draw circles......"

Gu Bei glanced at the craftsmen around him, faded his smile, and said: "This method is the foundation of my Baifu, and it will be passed down from generation to generation, and you will also be the craftsmen of Baifu for generations, with this craft, you will be respected and respected by the world."

Therefore, this law must be kept strictly secret, and if someone leaks it, don't blame someone for not being emotional!"

Everyone changed color in unison.

They are not fools, such an accurate mastery of the craft of steel refining will surely make those iron factories red-eyed, and the coercion and temptation must be countless.

Not to mention the gratitude of everyone to Gu Bei, that is, he was poached by other iron factories, can Gu Bei let him go?

Niu Dali hurriedly said: "Our craftsmen, since we are the subordinates of Baifu (from Luobeigang), it is impossible for us to defect to other places. Besides, although it is not difficult to blow this method, but the important links are operated by old apprentices, even if they do, they only know it and don't know why, and they will never leak this method, uncle, but please rest assured!

If there is a little bit of a difference, Lao Yu will take a few apprentices and compensate his uncle for dozens of lives of each family. ”

Gu Bei said with a smile: "Master Niu doesn't have to be like this, he just gave a word of advice, be careful to sail the ship for ten thousand years."

But from now on, you must report in advance when you enter and leave the compound, and you must have more than three people traveling together to supervise each other, I hope Master Niu can understand. ”

Niu Dali said with relief: "Uncle, don't worry, the old man will understand, it should be, it should be, if anyone dares not listen, you don't have to do it, the old man will personally discount their legs." ”

Such a secret thing must be strictly guarded against, and my uncle is already kind-hearted when he does this. If it is changed to another family, I will not be able to sign a life and death contract with you, and I will never want to step out of the iron factory for the rest of my life......

Niu Dali looked at the piece of steel and asked, "Uncle, this piece of steel ...... Can you let the old decay fight? ”

Gu Bei's face was black: "Is it possible to fight by yourself?" ”

It's just a piece of steel, and what will be there in the future, what's so rare? This old man is rare and strange, and his heart is itchy at this time, and it won't be long before he is afraid that such work will have to be arranged for his apprentices, and he doesn't bother to look at it......

"Great!"

Niu Dali smiled happily, happily picked up the steel ingot, first put it on the fire to burn red, and then knocked off a piece weighing about three catties, and put it under the precision forging hammer to beat.

The steel ingot was hammered into a thin piece, and Niu Dali put it on the calciner to burn it red-hot, and then struck a few times in the middle, and as soon as the iron tongs were forced, they were bent and stacked together in the middle, and then put it under the furnace to beat.

The apprentices who came around while beating explained: "This kind of forging method is to make a hundred steels, made into a treasure sword and sword, which can break gold and cut jade, cut off heads, and kill people without blood."

But good steel is rare, I have been fighting iron with my master for 20 years, and I haven't beaten it a few times in total, you boys are blessed, you all keep my eyes open and staring, don't be distracted!"

The group of apprentices hurriedly gathered closer, their eyes widened, and they refused to miss any detail.

That's a hundred steels!

Those legendary magic weapons that cut iron like mud and cut gold and jade, but they were all created in this way!

The steel sheet is thinner, folded again, and when it is cold, it is placed on the calciner to be heated...... The so-called 100 steelmaking, refers to each furnace heating is called a refining, and the furnace is called 100 times of refurnace, of course, it is only an approximate number, which is somewhat exaggerated.

In the era when there was no hydraulic forging hammer, it was generally the master who took the iron tongs to clamp the steel sheet, the apprentice took the hammer to beat, the manpower hammer knocked slowly, and the steel billet was cold after a few knocks, and it must be heated back to the furnace, and it was often necessary to return to the furnace four to six times when folded once, so the top of the sky was only thirty or fifty refining, if it was really a hundred refining, a knife was estimated to take three years and five years......

The hydraulic forging hammer strikes dozens of times per minute, fast and powerful, and beats on the steel billet like a drumbeat.

Niu Dali exclaimed: "It's so fast! You iron people are blessed, standing and watching the master strike the iron. I think that when your ancestor made 100 steels, the master and I picked up the hammer on the side, and I didn't close my eyes for three days and two nights, and my shoulders were swollen and translucent......"

None of the apprentices accosted him, and his eyes were firmly fixed on Niu Dali's hand, for fear that he would not be able to learn the craft of steelmaking.

Niu Dali taught the apprentices, the work in his hands did not stop, the hydraulic forging hammer hit fast, the steel billet was folded once and returned to the furnace once, and the furnace was folded twenty times after twenty times, reaching the level of 100 steelmaking.

Now the steel billet is to be formed with a forging hammer, and finally it is heated back to the furnace once, and the ox vigorously takes it under the forging hammer, and the ping pong bang gradually shows its shape.

The originally round iron ball turned into a flat and narrow iron bar, and a horizontal knife with a narrow blade and a sharp head could be seen.

Although it is only a semi-finished product, the cloud pattern of the blade is looming, like flowing water, cold light, and knife energy......

Niu Dali stopped working at this time.

Gu Bei looked at it with relish, and said curiously: "Why don't you fight?" ”

Niu Dali wanted to despise his uncle, but he didn't dare to ...... I had to explain: "Such a good steel, you can't be blind in vain, you have to wrap a layer of toughness wrought iron in addition to this blade, and quench it after the blade is opened, so as to get the best quality treasure knife!"

Gu Bei nodded, he also wanted to see how the treasure knife made of super-era steel combined with the best technology would behead and kill without blood......

Leaving the iron factory and returning to Baifu, Gu Bei suddenly leaned on the rocking chair, his eyelids were fighting, and he just wanted to sleep.

These days of tinkering with this ironworks, coupled with the overuse of the kidneys a few days ago, have almost exhausted his hard work.

Since he is not a professional smelter, he can only start with theoretical principles for all technologies, and then grope for a scientific and technological path based on his own memory......

There is some feeling of exhaustion.

Fortunately, the results are good, although there are still deficiencies and flaws, so that those craftsmen can slowly discover and improve in the process of practice.

In a drowsy state, two soft little hands put on his shoulders and neck, massaged them slightly, and Gu Bei groaned comfortably.

A faint aroma followed, and a soft body was attached to his side when his clothes flickered......

As soon as Gu Bei stretched out his hand, he accurately stopped a slender waist, Qing'er was taken aback by surprise, let out a coquettish cry from her mouth, and turned her head nervously to watch.

People come and go outside, and from time to time there are maids passing by, if you are bumped into by the lady, how embarrassing?

Knowing that this was inappropriate, he still couldn't refuse with a hard heart, so he leaned on Gu Bei, and let him hug him tightly, his pretty face was slightly dizzy.

"Hehe, so impatient? It seems that Uncle Ben has to take you down as soon as possible......" Gu Bei chuckled, opened his eyes and teased.

"Why!"

Qing'er was embarrassed, gently slapped him on the shoulder, and said slightly: "Qing'er is looking at my uncle who is too tired these days, so I just want to relax for you."

However, my uncle was inappropriate and caught someone's body, how could Qing'er break free? ”

Hearing her emphasize the word 'tired', Gu Bei smiled and said nothing.

Qing'er blushed her cheeks, bit her cherry lip, looked at Gu Bei with watery apricot eyes, knowing that her mind couldn't hide from her uncle, so she asked softly, "Why...... Why don't you look for Qing'er that day? ”

This sentence has been held in Qing'er for a long time.

Gu Bei's generous palm rubbed her delicate and smooth back through the thin shirt, feeling the moving toughness, and said with a smile: "You are still young, when Qing'er is older, it's good that my uncle is asking for you, and it is not good for you to ask for your body too early." Besides, my uncle likes Qing'er so much, how can he only care about his own happiness and ignore you? ”

Uncle cares so much about himself?

Qing'er only felt a surging fire of love rising in her heart, and she completely burned herself in an instant......

Burn and burn!

Even if you burn everything, you will never be able to leave him again, and you will have to accompany your aunt when you find your mother in the future......

Qing'er was moved, leaned down, and offered her red lips.

After a long time, the lips parted, and a transparent liquid line was opened, if it weren't for the uncle's body, Qing'er was really reluctant to push her uncle away.

How lucky I am, when I was a child, my family suffered, my father died in battle, and my mother was nowhere to be found. After entering the White Mansion, the people in the house also took care of her, and the eldest lady cared for her, so she thought that she would live like this in this life.

Accompanied the young lady to marry in the past, as a maid in the room, she made compromises and lived in a panic.

But unexpectedly, God also took pity on me and taught me to meet such a broad-minded and superb uncle......

In this life, what else can you ask for?