Yang Zilu said with a deep face: "Yu, you have to understand how great the ability is and how much the burden is." Well done! ”

Mi's eyes widened and he said, "I mean ......"

Yang Zilu turned around, sighed and said, "I understand what you mean, Xia Hu has the ability to roar, but he doesn't bother to pay attention to the matter of papyrus. Don't talk about the black bear, let people do it, you can get ten pieces of straw paper a month, I'm afraid it's the blessing of the god of Kui Niu! Don't talk about it, you're the best candidate! ”

After Yang Zilu finished speaking, he quickly slipped away, looked at Yang Zilu's back, and said with a sad face: "Master, I mean that you will be responsible for it, master!" ”

However, although Yang Zilu made a small pit, he did not relax because of this. As soon as he ran away, he met the palace ion that came to find him.

Gong Ion's right hand had already untied the sackcloth at this time, but he just twisted his wrist, and he had nothing to do after resting for seven or eight days. However, Gong Ion didn't come to Yang Zilu for the sake of his own hands, but for the matter of ironmaking. And Gong Ion's face is not very good, seeing his face makes people feel that they owe him tens of thousands of money, and it is the kind that has been in arrears for decades.

Gong Ion darkened his face and said, "Chief, you can't use coal for iron smelting!" The iron made from coal actually has more impurities than charcoal, and the iron bricks shatter when they are struck, like mud bricks. Those who don't know think it's mud bricks! ”

"Won't it?" Yang Zilu was a little dumbfounded, could it be that the iron smelting of later generations fooled people? Using charcoal as coal? Immediately, Yang Zilu put aside this unrealistic idea, and it is certain that he will use coal to make iron in later generations, but the question is why his use of coal is not as good as charcoal?

Yang Zilu hesitated for a while, found out a problem that I don't know if it is caused by the impurities of iron bricks, and asked: "Isn't the coal firepower fierce enough?" ”

"It's not!" Gong Ion shook his head and said: "Coal is indeed good, it takes about six hours for a furnace of iron ore to be burned into molten iron, but it takes more than four hours to burn into molten iron with coal, and it takes almost five hours to burn into molten iron, which is one hour faster than using charcoal!" I even doubt that coal will cut corners! ”

When Yang Zilu heard this, his head was full of black lines, and he could still cut corners in the matter of refining molten iron? It's all at that melting point, it can't melt if it doesn't reach the melting point, how to cut corners?

But Yang Zilu had no solution, so he had to go to the Ordnance Supervision to investigate in person, and after looking at the iron-making furnace, Yang Zilu found that it was not coal burning, but charcoal, and Yang Zilu couldn't help frowning.

Gong Ion rubbed the back of his hands with some embarrassment, and said with a wry smile: "Chief, I'm not afraid of delaying the quality, so I changed to charcoal!" ”

Yang Zilu frowned and said, "How long did it take to get coal?" ”

"It took three days to find out that the weapons were all made of iron bricks left over from the winter, or charcoal, but fortunately, there are not many people who have just started collecting coal, and they have only recently been used! It's a pity that there are more than 300 catties of iron bricks! ”

Yang Zilu said to Gong Ion: "Go to the armory and get a piece of coal-smelted iron brick and a charcoal-smelted iron brick and come to me!" I'll see what went wrong! ”

"Yes! Chief, you're waiting here! That little tiger, go pour a cup of hot water for the chief! Gong Ion said, and did not forget to let people greet Yang Zilu.

The Armoryman himself had a reading armory, which was built next to it, and the smelted iron bricks would be stored there. Even the weapons that had just been built were stored in the armory of the Armory, and when a certain number was reached, they were transferred to the specially built armory of the Nine Kui Ministry. So Gong Ion didn't let Yang Zilu wait for a long time, Yang Zilu just dipped her lips in the hot water poured by the apprentice named Xiaohu, and Gong Ion had already taken the two iron bricks.

Yang Zilu put down the teacup before he was able to take the two iron bricks in his hand.

On the surface, there is nothing special about the two iron bricks, the only difference is that the iron bricks made of coal are carved with a circle. However, Yang Zilu knocked the two iron bricks together, and the iron bricks smelted by coal were obviously a lot more fragile, and immediately broke some iron particles, revealing a collapse on the edge, while the other charcoal smelted iron block also had traces, but only a shallow trace appeared in the collision, and the hardness of the two was not proportional at all.

Although the iron smelted from this coal is not as exaggerated as Gong Ion said, like mud bricks, it is definitely inferior iron.

Yang Zilu picked up the iron brick smelted by coal and brought it to his eyes to take a closer look, but he didn't see anything yet, but he suddenly smelled a pungent smell of sulfur that was not too much to talk about but not too strong.

Yang Zilu couldn't help but feel a little strange, picked up another piece of charcoal-smelted iron brick, and smelled it, but there was no such sulfur smell, only a faint charcoal smell.

Yang Zilu stood up and asked Gong Ion, "Did you add sulfur when you made iron?" ”

"No! It was burned with coal or charcoal, and nothing was added! When Gong Ion heard this, he immediately swore and said. Seeing him like that, it seems that he can't wait to swear to the sky.

Yang Zilu couldn't help but wonder when he heard this, how did this iron come from sulfur? Suddenly, Yang Zilu saw the coal stacked near the iron furnace, and Yang Zilu was stunned for a while, and suddenly understood. slapped his thigh and said, "I understand!" It's sulfur! There is no desulphurization of this coal! Therefore, the smelted iron naturally contains sulfur, no wonder this iron has so many impurities and is so brittle! ”

"Brimstone? How can there be sulfur in this coal? Gong Ion was also a little dumbfounded.

Yang Zilu lives in Guangdong, and many people know that Guangdong's electricity is very tight, and even the power supply of the Three Gorges Project is mainly supplied to Guangdong. Guangdong's electricity supply used to be mainly based on burning coal, which had not yet been desulphisated, which led to many protests at the time. Yang Zilu still remembers that because the coal burned has not been desulfurized, it is easy to cause acid rain. Because of this, he knew that coal contained sulfur, and how could this iron contain sulfur without brittleness?

But how to desulfurize? Yang Zilu was a little dumbfounded all of a sudden. He can be sure that modern ironworks must use desulfurization in high-quality coal, the question is, how to desulfurize?

Yang Zilu is not from science and engineering, and more importantly, he only graduated from high school, that is, he has learned a little bit of chemistry. How does this coal desulfurize?

However, Yang Zilu thought about it for a long time and came up with a little clue, this desulfurization will definitely not be difficult. Because the use of coal to smelt steel was not said to have existed in the Qing Dynasty, and even the Ming Dynasty could have it!

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