Do you dare to believe me to check the information until now? Tears broke down.....

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Pei Yuming looked at a design drawing in front of him, frowning and thinking about how to cover the things on the design drawing

"Shhhh Chief, why is this thing so demanding? Fire-resistant, strong, and even the vents are well defined. Pen Fun Pavilion wWw. ｂiquge。 ｉｎfo”

Three days had passed since the last rally, and at Nuwa's insistent request, everyone changed their address to Li Fan, no longer using the word village chief, but replacing it with chief.

"Of course, this is used for steelmaking, and it must be resistant to high temperatures, otherwise the temperature is not enough to practice good steel, not to mention, and it is prone to accidents, everyone is precious now, and I don't want to lose anyone. Li Fan said

Pei Yuming nodded

"I see, okay, I see, chief, I'll go back and think about it first. ”

Li Fan waved his hand and continued his design drawing. Then he remembered something and hurriedly shouted

"Becky, help me call Thor!"

"Yes, Chief!"

.........

Old Thor opened the book called "Compendium of Metallurgy" with curiosity and confusion, and the fragrance of ink and the slightly misty handwriting on it indicated that the book had just been written.

After only a few glances, old Thor's eyes widened and his breath became rapid, and then he closed it again, as if he was wondering if he was dreaming.

"Village... Chief, this... Is this a new way to make iron?"

Li Fan stretched out his index finger and waved

"No, no, no, this is not ironmaking, this is steelmaking!"

"Steel ..... What is it?"

"You don't even know what steel is?" Li Fan asked as he turned his head in surprise

Old Thor shook his head in embarrassment and whispered

"I... I really don't know.... Village Chief, am I useless?"

Li Fan stood up and walked in front of him and patted Thor on the shoulder

"Old Thor, how can you make the texture of the iron better when you used to strike iron?"

Old Thor thought for a moment and whispered

"I always forge a piece of iron repeatedly, sometimes dozens of times, so that the texture of the iron will be much better!"

Li Fan smiled

"Look, don't you know?"

Old Thor was stunned, "Village Chief, is that steel?"

Li Fan nodded, "That's right, in the process of forging block iron and wrought iron, people need to constantly and repeatedly heat, iron absorbs the carbon in the charcoal, improves the carbon content, reduces impurities, so that the iron becomes more excellent, and the performance of more aspects has been greatly improved, this is steel!"

You take these two books back and read them first, be sure to understand them, and pay attention to confidentiality, probably the day after tomorrow, I will start smelting the first furnace of steel, and then you will just look at it on the side, and in the future, we will skip ironmaking and go straight to steelmaking!"

Old Thor came in a daze, and went back in a daze, carrying the "Metallurgical Summary" that he had taken as the root of his life in his arms, and even when he was sleeping, the three big words "Steel Filling Law" were floating in Old Thor's dream.

......

Two days later, Li Fan stood in front of a strangely shaped square object, and there was a dark cauldron in the square object.

Li Fan first stuffed the cauldron with some iron ginseng pieces that had been cut into small pieces by the dog's eggs and threw them into the cauldron, then began to heat them, and kept blowing in them with a homemade blower.

The air around the stove began to twist faintly, and Thor asked in surprise as he looked at the walls of the stove, which began to turn red after a while

"Chief, why does the furnace heat up so quickly? In the past, even if there was a blower, it would take a long time to blow the temperature before it could get up... But this...."

Li Fan said while instructing the dog to continue squeezing the airbag behind the blower

"Because I'm blowing oxygen, you just need to know that oxygen can support combustion, and blowing in a lot of oxygen can also play a role in isolating other gases, so that the steel has less impurities. ”

Thor's eyes lit up, and he asked

"Chief, where do you get the oxygen?"

Li Fan smiled bitterly

"The current oxygen is all a by-product of the last airship and electrolysis of water, and I also got an airbag to store it, and it will be gone when it runs out.

By the way, Thor, the steelmaking method I use now is called the crucible steelmaking method, uh... Of course, now it can only be called the semi-soil crucible steelmaking method, compared with the steel filling method, the output of the crucible is small, but because it is liquid molten steel, the quality is much better.

......................”

The crucible steelmaking method, as the name suggests, is a cauldron of steelmaking, which is not difficult to say, and it is not easy to say simple. The mystery of this method lies in the crucible, the crucible made of graphite mixture is not only resistant to high temperatures, but also the iron continues to absorb the carbon in the graphite and melt into high-carbon molten steel, and when the steel melts in the crucible, the graphite carbon can also act as a reducing agent.

Oxygen can be removed from the steel, and various inclusions can also be removed from the liquid steel. The crucible method was also the first method of producing liquid steel in human history.

However, the crucible is initially poured with molten steel and then forged into the desired shape.

Li Fan, as an unprecedented master of mechanics, of course, could not use a hammer to knock it out so lowly, he was ready to use a mold, and it was a kind of tall mold - "investment mold".

The product produced by investment casting has high precision, with the help of dog eggs, it can far exceed the accuracy of the sand mold, and the surface is smooth, which is not intended to be the best choice for making cylinders.

Before discovering these things.

Li Fan was already planning to use the steel made by the steel-filling method to make a steam engine, but when he was wandering around the Emerald City, he was surprised to find several interesting and continuing things, that is, graphite, and the secretion of a D4 planetary creature, except that the amount was relatively small, almost the same as rubber!

Li Fan suddenly became interested, if it weren't for the fact that the machine tool couldn't keep up, with the precision cutting and laser measurement of the dog's egg, he would even want to skip the steam engine and get the internal combustion engine or the Stirling external combustion engine directly.

However, this is destined to be YY.

For this reason, Li Fan has also sighed countless times, with his ability and such a big golden finger, it is extremely difficult to make a steam engine, and the otaku protagonists in the novel have made a lot of things not long after they go back to the past, which is simply a humanoid 3D printer!

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Li Fan's Diary

Three years in Sheep Village

............ I always thought that as long as I had countless knowledge, I could do anything in ancient times, but it wasn't until I came to this era of nothingness that I realized how difficult it was for China to get to the present.

Tech trees aren't the only thing to climb.

What really affects human manufacturing capacity is the scale of society.

If the scale of society is not reached, the supply of social infrastructure is not solid, and there is no need to invent or produce many things, even if I have more, I will always find that what I want to build lacks one or two key things, and there is not enough economic supply to support it.

The basic industries that support advanced technology are quite large, which makes the technology that can expand the population the backbone of these high technologies, and I need everything that I didn't care about before, I need basic industry!

If it goes well, I may be able to build a small industrial base in five years.......

Now we are moving forward from the beginning..... From the beginning......