However, everyone didn't know Li Yewu's thoughts, and when they saw Li Yewu coming in, they spontaneously sorted out their clothes, for fear that they would surprise the little lady.

During this period, Xingge showed Li Yewu various raw materials and iron-striking tools in the factory, and also demonstrated the whole process of molten iron and iron-making.

In fact, the biggest difference between white iron and gray iron is that the carbon and silicon content of the material is different, and the other quenching processes are basically the same.

However, there is another difference, white iron can be turned into gray iron, but gray iron cannot be turned into white iron.

To change its properties, the method is also very simple, as long as a certain ratio of carbon and silicon is added to the smelting of white iron, white iron can be turned into gray iron with good resistance.

However, this method, like the discovery of gunpowder, is the result of hundreds of thousands of years of evolution and unintentional collision.

Normal people smelting iron will at most think about sacrificing individuals to the furnace, but they will not think about adding chemical elements.

Of course, it is also because people did not know much about chemical elements during this period.

Even if you happen to add carbon, you can't add silicon, because ...... Silicon needs to be refined.

However, Li Yewu is an excellent student in chemistry, and it is difficult for her to refine chemical elements.

It's just that there are no tools to take advantage of, and there is no suitable venue.

Li Yewu was a little helpless, it seemed that she had to build a chemistry laboratory before she was striking iron.

Time is pressing, and she can't afford to measure whether it's worth getting a laboratory, and at this time, she can only cross mountains and rivers and rivers.

Li Yewu rolled up his sleeves and drew a bunch of test tube utensils in the laboratory, and then told Zicui to go to the city to find similar things, and if she couldn't buy them, she would find a way to find someone to burn them.

Zicui nodded without hesitation, and ran outside.

At this time, Li Yewu was not idle, and began to look for sand all over the ground.

Seeing this, everyone couldn't help but wonder: "What is the little lady going to do?" ”

"Make some gadgets."

Li Yewu replied casually, but everyone couldn't help but feel stunned.

Good...... What a familiar line......

They heard Erge say that the little lady said before that she would make some things for her daughter's house, but the gunpowder came out and killed Ryuuji.

Now, the little lady said that she wanted to make a gadget...... Could it be ...... Gunpowder again?

Could it be that the secret recipe for iron-making that the little lady said should use gunpowder!!

Everyone inexplicably felt the threat of death, and their throats were a little astringent.

"Madame...... Is your ironmaking method reliable? ”

Gunpowder explodes when exposed to open flames, which is extremely dangerous, and I have never heard of anyone using gunpowder to make iron, and even if there were, all those people died......

The little lady is going to push everyone into the fire pit......

Everyone looked bitter.

Li Yewu didn't know what everyone thought, but when they didn't know the bottom of their hearts, he patiently comforted: "Don't worry, I will not fail if I try this method." ”

"......" people: I hope ...... Bodhisattva bless!

However, who allowed himself to sell his life to his master! Now the little lady not only saved the master, but also helped the master pay off the debt, and even got back the land and property that the master had lost!

With such kindness, what else can they do but die and accompany them!

The crowd could only join in the search for sand as if they were dead.

Although the Iron Smelting Bureau has a lot of iron materials, the sand and gravel do not.

Li Yewu could only hit his own palace again.

Fortunately, in addition to the hot springs, there is also a large practice ground.

The training ground is covered with thick sand, firstly to train the strength of the feet, and secondly, to protect the feet from being injured by hard ground.

It is also said to be one of Xiao Jiuxi's favorite places.

According to the description of the novel, although this person is in the second middle school, he is very talented in learning kung fu, and he likes it himself, so he has his own martial arts training ground everywhere.

I usually like to go to the hot spring to take a bath after practicing.

Li Yewu did not hesitate and went directly to the martial arts training ground to dig sand.

Anyway, Xiao Jiuxi won't come back, and instead of wasting this land, it's better to make the best use of it for her.

Speaking of which, the earthen stove used to boil nitrate last time has not been dismantled, and Li Yewu commanded them to carry the sand to the hot spring.

Everyone did not doubt that he was there, and they cooperated to carry it over.

On the way through the cloister to the hot springs, the crowd discovers strange places.

The palace used to be just a house with four walls, but now there are no people anymore, and it is empty everywhere!

Brother Yan couldn't help but wonder where the others were.

"They all went to work in the construction team, and they were happy to do 200 wen a day."

"......" sings.

"But you don't have to worry, helping me now is equivalent to helping the construction team, and I will count 200 wen a day for you." Li Yewu smiled heartily.

"Uh...... King...... The little lady doesn't have to give it to us, the money is not easy to come by, you can just keep it. ”

The song waved his hand again and again.

They went out to work to help the palace, how could they ask for money from the palace again.

Li Yewu nodded movingly: "Okay, I won't treat you badly!" ”

Where did Xiao Jiuxi dig up these treasures, look at the consciousness of these workers, they are really models for our generation.

The reason why I feel this way is because the group of people who went out to work also said the same thing.

Li Yewu insisted on giving money, so they consciously handed it over to the old housekeeper, saying that they didn't want to suck the blood of the palace.

moved Li Yewu to a great extent.

However, everyone didn't understand why the little lady was so moved, they just did their part.

As a dead soldier, life belongs to the master, let alone money, isn't it?

Ancient and modern ideas are destined to be unable to seek common ground, and the two sides have been talking for a while and have begun to get down to business.

When it comes to the method of extracting silicon, it is actually simple.

The compound produced by mixing sand and coke and heating at high temperatures is crude silicon.

Crude silicon and chlorine can be heated at high temperature to obtain silicon tetroxide, and then hydrogen gas can be replaced with hydrogen to continue heating at high temperature to obtain pure silicon.

This is the common knowledge of chemistry in middle and high school, as long as you listen to chemistry class well, you will know the formula.

However, although the formula is simple, it is not easy to operate.

After all, there is no decent laboratory here, and it is better to say that it is more troublesome to collect gases such as hydrogen and chlorine.

However, the object is dead and the person is alive, and there are always more ways than difficulties.

Li Yewu plans to make a batch of coarse silicon first, use coarse silicon to test the performance of steel, and then slowly purify it.

Anyway, Zicui's bottles and cans shouldn't be so easy to find.

So, Li Yewu began to be busy playing house.

I saw her boiling the pot red, pouring sand and charcoal into it, and then covering the lid and simmering over high heat.

When everyone was worried that the iron pot was about to be burned, Li Yewu finally stopped adding firewood and happily opened the lid.

When the lid was opened, a miraculous scene occurred, and the sand actually fused with the charcoal to form a strange medium, which was not like sand or carbon, and turned into strange stone particles.

Everyone was a little indescribable, the little lady was really a weirdo, and she actually played a game of mud stir-fry that a child can play.

Seeing this, everyone was a little hesitant, this thing can really practice iron?