"Our iron is made from iron ore, and iron ore exists on the outside, and in addition to iron, there are many other things inside, and these things are impurities."

After Lin Yi explained Peach Twelve's question, he smiled and nodded at him, then looked at Peach Eleven again, and said, "Eleven, you are right, in addition to the carbon element in this iron, there are also some other things hidden, and these impurities are the things hidden in the iron ore, although they have been melted and purified at high temperatures, they still can't be separated out."

It's just that we can't see with our eyes, but we can judge what elements are contained in it through other methods. ”

Peach Eleven suddenly realized and said, "I see, but I don't know, how can I judge what is contained in it?" ”

Lin Yi said: "Don't talk about anything else, I'll tell you first, how to observe the amount of carbon in this piece of iron." ”

Speaking of this, Lin Yi paused slightly, and looked at the three of them, all three of them were engrossed, staring at Lin Yi without blinking to listen to her speak.

Lin Yi continued: "The method of detecting the carbon content of the iron block, as you have just seen, is to put the iron block on the rapidly rotating grinding wheel and grind it, and then observe the sparks, you can simply judge the carbon content of the iron.

Generally speaking, iron with a very low carbon content has a spark spray that is very far, and the directionality is also very strong, and there is little pollen, while the iron with a slightly more carbon content will have a shorter spark spray distance, a larger area, and more pollen.

Iron with a higher carbon content will have a short spark and a popping sound, and it is also the brightest, so if you see the iron rubbing against the grinding wheel and bursting like a firecracker, it means that it contains more carbon. ”

The three of them suddenly realized, and Li Yu said with emotion: "It's really better to listen to the owner's words, than to read for ten years, so the owner, is the iron rod we just had just qualified?" ”

Lin Yi nodded and said, "Qualified, it can be put into use, Li Yu, have you recorded the steps and methods of refining before, so that you can smelt iron according to the same method next time." ”

Li Yu was overjoyed when he heard Lin Yi say that he was qualified, he nodded and said, "I have recorded it all." ”

Lin Yi nodded and said, "Okay, starting tomorrow, look at refining such iron, and I will give you the size in a while." ”

"Yes, host."

Lin Yi said again: "Li Yu, you recruit two more blacksmiths to come over and work here, you teach them the method first, and when they can refine qualified iron, you can withdraw to do other things." ”

"Yes." Li Yu nodded in agreement, he hesitated for a moment, and said, "Dongjia, I have a question, I don't know if I can ask the Dongjia?" ”

"What is carbon, you want to ask?" Lin Yi remembered the question he had just asked and said.

Li Yu nodded and said, "I also want to know about this, but there are other things besides this." ”

Lin Yi smiled and said, "If you don't understand anything, just ask, as long as I know, I will tell you." ”

Li Yu listened to Lin Yi talking to himself so cordially, and he didn't look unhappy at all, he was very happy, he was busy and said: "My method of smelting iron was taught by my master, and before, my master also refined it for a long time, but why is the iron he smelted unqualified?" "I want to talk with more like-minded people about "The Idiot of the Hot Wife of the Farmer's Gate and the Foolish Husband Chasing His Wife", and pay attention to "Youyue Literature" on WeChat, talk about life, and find a confidant~