I received my adopted son in the Three Kingdoms

Chapter 115 Coal

Finally entering the innermost smelting room, a wave of heat rushed towards his face, instantly making Cai Yan's face turn red.And when he saw the molten iron in the furnace, he was even more surprised and speechless.

"Uncle, uncle... How, how is this possible?" She was puzzled, she was surprised, and she felt that her three views had been subverted again: "What can melt pig iron into juice?"

It is no wonder that Cai Yan was surprised. Although the technology of forging steel has existed in this era, the method of frying steel like this has not yet appeared.

Craftsmen can only smelt iron ore into a spongy solid block, that is, after a block of iron is smelted, it can be forged repeatedly to obtain steel.

The more times of repeated heating, folding and forging, the finer the structure of the steel, the more uniform the composition, and the less impurities. It is found in the records of "five refinements", "nine refinements", "thirty refinements" and "fifty refinements". , '72 Refining' and 'Hundred Refining'.

For example, Boss Cao ordered Yousi to make five Baipi knives, which are the sharp weapons of Bailian.Two of them are most likely the legendary 'Yitian' and 'Qingzhi'.

Sun Quan has three treasured swords, one of which is directly named 'Bailian'.

Liu Bei is a bit shabby here, and there is a precious sword made for him by Pu Yuan, which is engraved with '72 Lian'.

It takes hundreds of craftsmen three to five years to manufacture such a precious knife, and the cost is simply sky-high.The effect is of course cutting gold and jade, cutting iron like mud, which can be called a treasure of the country.

Old Dong reckoned with the above three, even if he wouldn't sleep with them at night.It will also be locked up in a precious place, so that ordinary people cannot see it.

Of course, swords forged in this way cannot be equipped in large quantities for soldiers to use.Ordinary soldiers still use wrought iron plates, which will become blunt after a short period of confrontation on the battlefield.

The ancient Roman soldiers of the same period were even worse. The wrought iron sheet in their hands would bend when they were stabbed, and they had to straighten their feet before continuing to fight.

The emergence of the method of frying steel just solved this problem.

Just add an appropriate amount of fine iron ore powder into the pig iron solution, and keep stirring at the same time, after the slag is removed and cooled, a large amount of cheap and high-quality steel can be directly obtained.

Although it is not as good as Hundred Refining or 72 Refining, it is more than a little bit stronger than wrought iron films of the same period.

"Chairman, please try the knife." At this time, the test worker order had already fetched a ring knife, and ordered people to put two pairs of leather armor on the wooden stake.

Old Dong held the knife in his hand and flipped it back and forth a few times.Immediately, he closed his eyes and inhaled in front of the wooden stake, showing Yuan Ting Yue Zhi's calm demeanor and demeanor of a master.

Cai Yan's eyes couldn't help but start to shine, feeling that the old Dong Shuai was dumbfounded at this time.Even that fat body is full of indescribable beauty, which makes her unable to help but like it.

Then, she suddenly stopped breathing.

Because at this time, Old Dong had already raised his knife high!

The next moment, in the expectant eyes of the examination officer, Old Dong suddenly... handed the knife to Dian Wei who was at the side, and said, "Awei, you should come, I'm afraid that the old man will lose his waist..."

The light in Cai Yan's eyes suddenly disappeared, and a burst of anger rushed straight to Tianling Gai.If it wasn't for the presence of others, I would have wanted to go up to Bangbang and punch him a few times.

Kao Gongling's face was also a little stiff, with his hands in his sleeves sometimes turning into fists and sometimes turning into palms, he wished he could know how to baguazhang, and with one palm he could shatter Lao Dong's celestial cap.

The next moment, the two suddenly fell silent.

Dian Wei, who doesn't talk too much, took the knife, imagining the wooden stake as Old Dong, and suddenly slashed down with the knife, the wooden stake and leather armor were instantly split into two!
"Ah!..." Cai Yan covered her mouth and exclaimed.

She thought instantly, if that stake was a living person on the battlefield, what a bloody and horrible scene it would be.

Dian Wei was stunned for a moment, and then couldn't help grinning: "My lord, this knife is not bad!... If you have time, why don't you replace your iron halberd with a steel halberd?"

"Would you like to replace the door of your house with steel, it will be so strong!"

"Okay!" Dian Wei readily agreed before he could react.

However, Cai Yan blushed with embarrassment, and quietly approached Old Dong through the cover of his wide sleeves, and gently twisted his waist, but his face was as usual: "Uncle, I haven't told my niece how to melt the pig iron. For the juice?"

Old Dong frowned at the time, and then, using the cover of his sleeve robe, he patted Cai Yan's buttocks lightly: "My niece actually saw it when she came, it's coal."

Cai Yan's delicate body trembled suddenly, and subconsciously screamed again, her face was so red that it was almost bleeding.But seeing the shocked eyes of the people around him, he could only hold back and let go of the tormenting old Dong's hand.

Kao Gong Ling, Dian Wei and other craftsmen are certainly not blind, but at the same time, they are not fools either.

Even though they clearly saw the small movements of the two of them, they were only a little startled and looked at their noses and hearts, as if they hadn't seen anything.

"Coal?..." Now, Cai Yan really didn't understand.But for some reason, the gray-white slag buried by the slaves when he first came in came to his mind.

"Oh, it's graphite or charcoal... that's not right, it might still be called Shi Nie at this time." Old Dong pointed to a pile of coal in front of the furnace and said.

"Shi Nie?" Cai Yan still showed a rare puzzled expression.

As a famous talented woman, her knowledge almost kills any woman in this era.But like ordinary scholars, her main knowledge point is still in the "six arts", and she is proficient in explaining scriptures and classics.

Fortunately, there is an old man who is well-versed in ancient and modern times. After studying these studies thoroughly, he delved into some strange knowledge. With her, he also knows the origin of the world's elite soldiers, the annual production of the people, the lifespan of war horses and the production line of the Qin Dynasty. etc.

Maybe even know a little bit about mare postpartum care...

However, the knowledge point of coal is too biased.

Even though China was the first nation to use coal, it was used for iron smelting in the Western Han Dynasty.But the folk and book records are really too few, so few that Cai Yan, who has a photographic memory, can't remember it.

It can only be explained that she has never seen any records of coal.

After all, mining in this era was very difficult. Even though the Western Han Dynasty court had records of using it for iron smelting, it experienced Wang Mang's usurpation of the Han Dynasty and the chaos of the Green Eyebrow Army, and a large number of historical materials in the palace were destroyed.So much so that charcoal was still used for iron smelting at the end of the Eastern Han Dynasty, and coal was not mined and used on a large scale until the Northern Song Dynasty.

Old Dong was about to explain, but Cai Yan spoke again immediately: "But it is recorded in "Han Shu": Stones produced in Yuzhang, can they be burned as salary?"

"Ah, yes, yes, this is it!" When meeting such a high-quality human female, Old Dong really wanted to kiss her hard: This is called a professional!

"Shi Nie is also called coal. Don't ask why, it's because the old man likes to call it that."

Old Dong began to slander people again, saying: "The burning temperature of coal is not at the same level as that of charcoal. Charcoal can't melt pig iron because the temperature can't reach it, but coal can."

"And the higher the temperature, not only can the pig iron be melted into juice, but also the more impurities can be removed, and the steel produced will naturally be more pure." After saying this, Old Dong obediently shut up.

After all, why adding refined iron powder to molten pig iron and stirring it will result in steel. This involves a lot of chemical knowledge points, and it is very complicated to explain.

The most important thing is that this point of knowledge...he doesn't understand either.

He just heard about this from the turbulent female history teacher, and then let the craftsmen experiment again and again, and after spending a lot of coal and iron ore, he restored the method of frying steel.

"Well, uh... There is another point to pay attention to when using coal to smelt molten iron. It is to build a flue to let the poisonous gas produced by insufficient combustion of coal escape. Otherwise, people's lives will be in danger."

After holding back this sentence again, seeing the suspicion in Cai Yan's eyes getting stronger and stronger, it was the first time that Old Dong felt that he was at the end of his rope.

Just as he was about to perform the Dafa of changing the subject again, he suddenly heard a noise coming from outside.

"The important place of the military factory, idlers and others are not allowed to trespass, and those who violate the order will be killed without mercy!"

"So, so, so..." The other voice was a little immature, as if he was still stuttering. 'X' for a long time, but did not say a complete sentence.

Old Dong was overjoyed, and quickly pretended to be displeased, saying: "Bring that person in..."

(End of this chapter)