Emperor Yong'an silently waited for Su Jinli's filial piety, but he waited until the evening, and Su Jinli didn't say anything to send things to the palace!

Emperor Yong'an was a little unhappy.

Daughter-in-law: What does this mean?

Even if you don't honor his father, you have to honor Queen Zhang!

But it was too late, and he couldn't send someone to ask.

It was another thing that made him more concerned.

The ironworks are built!

This ironworks is only used to make agricultural tools, but Emperor Yong'an still cares about it.

Especially after hearing that Su Jinli worshiped an old immortal as a master.

Fortunately, the ironworks were watched day and night by the people he had sent, so he didn't have to worry too much.

Now that the ironworks have finally been built, they can finally build farm tools.

He wants to see what kind of flowers his daughter-in-law can play!

In fact, the ironworks have been built for a few days, but the house cannot be used immediately after it is built, so it has to be dried for a few days, and some detailed inspections have to be done.

Otherwise, it is easy to have safety accidents.

Emperor Yongan also deliberately sent a trusted person to carefully inspect it, for fear that something would happen and involve his son and daughter-in-law.

However, Su Jinli didn't know Emperor Yong'an's thoughts.

On this day, she asked Cinnabar to send Zhang Changsheng scar removal cream, and then "retreated" again.

It wasn't until late in the evening that I came out for dinner.

On the second day, the steward of the ironmaking workshop personally went to the Qin Wangfu and asked Su Jinli when to start making iron and building agricultural tools, saying that the iron ore and craftsmen were ready, so they had to open the furnace.

Su Jinli changed into men's clothes and prepared to go to the ironworks in person.

However, she didn't tell the steward, but lied and claimed to be a staff member of the Qin Palace.

She was very well disguised, and she looked like a handsome young man, and she didn't see that she was a woman at all.

The steward didn't expect her to have such courage, so she was easily deceived.

When he arrived at the ironworks, Su Jinli first checked the iron ore and found that the quality was very good.

But listen to the steward, these iron ores are not the best, and the best iron ore is used to craft weapons.

It's just a way to build farm tools, and the iron ore used is too good and wasteful.

Su Jinli was not disappointed, for her, these iron ores were enough.

She hadn't made steel herself, but her grandfather had a friend who was a master of steel mills.

He has been refining steel all his life, and when he got older, he was not in good health, so he went to his grandfather for treatment.

Grandpa took her to live in the old man's house.

During that time, she lived a very fulfilling life.

The old man had a lot of models at home, and he also collected various iron ore samples, and he took her to visit them in person.

The old man is old, and his children and grandchildren are not around, probably because he is too bored, after seeing her, he treats her as his own granddaughter and talks to her about steelmaking.

Later, she also met the old man's own grandson, who was a weapon fan and tossed a small workshop to build cold weapons.

Like bows, crossbows, swords or something, and she was invited to visit.

Su Jinli has been exposed to it, and she has learned a lot of dry goods.

For example, the quality of iron ore is what the old man has popularized with her.

There is also how to make steel, how much temperature should be controlled, the ratio and so on.

As soon as the old man opened his mouth, it was full of all kinds of dry goods, he said it excitedly, and even mentioned a lot of professional things, regardless of whether Su Jinli could understand it or not.

So Su Jinli knows a lot now.

Although it can't be compared with a skilled cow like the old man, it is definitely more than enough to build farm tools.

After inspecting the quality of the iron ore, she went to inspect the blast furnace used in steelmaking.

This blast furnace was built according to Su Jinli's intentions, which was a little different from the blast furnace of the War Bureau.

When iron is smelted, the iron ore is heated in a furnace and melted into molten iron.

The blast furnace that Su Jinli asked people to build should be more advanced in design.

When making iron, raw materials such as iron ore, coke, and limestone, which are processed into slag, are added from the top of the furnace.

The air vent is located at the lower part of the furnace.

In order to improve efficiency, the air blown into the furnace is preheated before it is blown in through the tuyere.

After high-temperature calcination, a series of chemical reactions occur in the furnace.

For example, the carbon in coke reacts with oxygen in the air to become carbon monoxide.

Carbon monoxide reacts with iron oxide in iron ore to reduce iron.

Whereas, iron melts at high temperatures and turns into molten iron. The final molten iron is the so-called pig iron.

Iron ore also has a lot of impurities in it, and when these impurities are mixed with limestone, they will turn into slag.

Because of the high proportion of molten iron, the mixed slag will float on the surface of the molten iron.

Therefore, as long as the position of the slag outlet is controlled, the slag can be hooked out with a hook.

In the end, only a relatively clean molten iron remained.

There is also an observation port on the blast furnace to facilitate viewing of the situation in the furnace.

In addition, the coke gas can also be exported from the furnace and used as fuel for the next heating furnace after being dusted by the filter.

Not far below the iron-making furnace, a prepared casting model is placed, and a square pond is built on the other side, after the molten iron is discharged from the tap port, part of it will flow into the casting fan and cast into a pig iron plate, and the other part will flow into the square pond.

There is a low wall next to Fangtang, when the pig iron water flows into the square pond, the craftsmen will stand on the low wall, sprinkle the pig iron water with fine mud powder, and then use willow sticks to quickly stir to decarburize the pig iron.

At this time, if the degree of decarburization can be controlled, high-carbon steel or low-carbon steel, or even wrought iron, can be directly obtained.

It is a pity that the ancient conditions were backward, and the craftsmen relied on experience to deal with it, and there was basically no scientific means to strictly control the carbon content in the molten iron, so they would directly process the mature iron, and then use the steel filling method for carburizing to obtain steel.

Although Su Jinli had heard the old man say a lot of dry goods, she had never refined it herself, and she couldn't strictly control the carbon content for a while.

Only a relatively clumsy method can be used, and after many experiments and records, and then the type and quality of iron are measured, a set of relatively strict steelmaking methods can be formulated.

However, it will definitely take a lot of time to conduct multiple experiments, so before the results of the experiments, it is natural to let the craftsmen follow the old method and fry wrought iron.

After Su Jinli checked the furnace and found that there was no major problem, he checked the mold again.

Then let the craftsmen start making iron.

The craftsmen here were all found by the stewards, and some of them were even transferred from the military bureau in the palace.

These people have long studied the blast furnace that Su Jinli let people build, they are all old craftsmen of ironmaking, and when they look at the furnace, they find that it is not the same as what they usually use, and it looks weird.

It's just that they haven't tried it yet, and they don't know if the stove is good or not.

Now that Su Jinli has opened his mouth, they can't wait to start.

vertex