: Stir-fried Steel Method The hot red molten iron flowed out, which immediately shocked everyone, even the craftsmen working here.

They have all been engaged in iron smelting for many years, and it is rare that they can directly melt molten iron.

"It happened in such a short time?" Li Zheng said in surprise.

"Have you noticed that the molten iron flowing out is very clean and does not seem to be contaminated with too many impurities?" Master Xi said in surprise after taking a closer look.

Wang Kang, who was standing aside, smiled and remained silent. This was possible because of the unique design of the furnace.

In the construction of this underground furnace, Wang Kang was heavily involved in the design of modern flat-rotating steelmaking furnaces.

During the smelting process of iron ore, the fuel slag or the residue after ironmaking and the molten iron will be separated and filtered, and the molten iron will gradually seep down and enter a special container.

Then it flows into the extended diameter tube and leads to another furnace, thus forming a complete production line.

Master Xi said: "Master Kang, if you can smelt iron ore to such an extent, when the molten iron solidifies, it will already be a high-quality iron embryo. If it is hammered and tempered, the quality will be even better!"

He is responsible for smelting iron in the Smelting Bureau, so he naturally understands this truth.

Wang Kang shook his head: "This is not enough!"

If we really follow what Master Xi said, we can indeed obtain steel, but it will be a waste of manpower and time.

The essential difference between steel and iron is actually the difference in carbon content. Iron with a carbon content of more than 2% is called pig iron; iron with a carbon content of less than 2% is called wrought iron; carbon content is between 0.05% and 2%.

The iron in % is called steel.

For example, after the molten iron melted out now solidifies, it becomes pig iron. The carbon content of pig iron exceeds the standard, so it needs to continue to be refined.

Several people continued to watch. At this moment, the molten iron had flowed to another furnace. This furnace was different from the previous one.

Because there is no layered structure inside this furnace, it is similar to a closed barrel.

At this moment, the fire in this furnace has been lit for a long time, and after such a long period of suffocation, the temperature is already extremely high.

At this time, a craftsman poured iron powder into the furnace through the opening on one side.

Seeing this scene, Li Zheng was shocked and said hurriedly: "You have already melted the iron to this extent, why do you still need to add iron powder?"

"Isn't this unnecessary? Will it destroy the original smelting?"

"Master Kang, this is a failure, let them stop!" Master Xi also said hurriedly, they couldn't understand it at all.

Hearing this, Wang Kang said calmly: "What is refined in the first furnace can be called pig iron. The carbon content of pig iron is high, so it needs a second smelting."

"What's the carbon content? What is this?" Li Zheng and others were a little confused after hearing this.

"The carbon content is a criterion for judging the refined material." Wang Kang said.

But these words made them even more confused.

Wang Kang slapped his forehead and said, "You'd better watch it first. I'll explain it to you later."

At this moment, the dumping of iron powder has ended. Since they are working close to the furnace, the craftsmen are so hot that they are sweating...

"What is that doing again?"

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"This is for stirring." Wang Kang explained.

"What are you stirring?" Master Xi asked. What they saw today really confused them.

They couldn't understand every step Wang Kang made. They must know that the three of them are all veteran craftsmen of the Smelting Bureau, and they are all experts in the field of iron smelting.

At this moment, they were asking Wang Kang questions, and even they themselves were not aware of this.

Wang Kang explained: "Add iron ore powder and stir continuously at the same time. Use the oxygen in the air to remove part of the carbon in the pig iron to reduce the carbon content in the pig iron!"

“The reason for high-temperature smelting is to remove the slag so that steel can be obtained directly!”

Wang Kang said solemnly: "I call this steel-making method the steel-frying method!"

It has to be said that the working people in ancient times were great. Iron and steel smelting have always been in a leading position in the world. The general development process has gone through several stages.

The earliest method used was the steel filling method.

Then there is the block smelting method, which is to smelt iron ore into sponge-like solid blocks.

Because the refining is rough, the texture is soft, and it contains a lot of residue, so it needs to be forged. Simply put, it means burning, beating, beating, burning, and so on...

This increases the carbon content, distributes it evenly, and forges steel.

This is also the origin of how steel is made into steel!

In the era that Wang Kang lived in, this method was roughly used, but they were not aware of the existence of steel yet.

Master Xi once purified the quality of the iron embryo, which should be like this.

Wang Kang used a more advanced method, the steel frying method, which first appeared in the middle and late Western Han Dynasty. The invention of this technology was a major breakthrough in steelmaking technology.

Combined with the current conditions and environment, it was adopted by Wang Kang, but in the process Wang Kang combined some knowledge from previous lives, such as the construction of the furnace...

"Steel frying method?" Several people were stunned.

"Is steel the material you said is harder than iron?" Li Zheng asked.

"right!"

Several people's questions interrupted Wang Kang's thoughts.

Master Xi took a deep breath and said, "Then we will wait and see. If you can really succeed, that will be a pioneering work!"

At this moment, their suspicions were reduced a lot, because Wang Kang's new refining method and many theories they had never heard of made them convinced.

The iron powder and molten iron are fused and penetrated during stirring. This process is equally important, and the time and temperature must also be controlled well.

If the carbon content is increased, it will have no effect. If it is exceeded, it will become wrought iron, which is equivalent to being useless.

However, Wang Kang had already thought of this problem beforehand, and the ratio of iron ore powder to molten iron was just right!

After a short time like this, Wang Kang personally went over and commanded, "Stop, turn on the furnace!"

Hearing this, all the craftsmen were startled, because the final result is about to come out, whether it is success or failure, right now!

Under Wang Kang's instruction, all the craftsmen moved a rocker arm. This was a mechanism that could open a hole in the inner furnace and let the molten iron flow out!

Soon after some operations, the molten iron after secondary smelting flowed out along the pre-arranged channel.

The location of the flow direction is a soil mold!

This soil mold is circular and more than three meters long. If anyone pays attention, they will find that this length is exactly the same as the height of the excavated tunnel!

"Master Kang, do you want to make the finished product directly? No need to temper it?" Master Xi asked in surprise.

"No need!" Wang Kang responded with a smile.

"The first one has been completed, change to the next mold, hurry up!" the foreman shouted.

Soon someone immediately placed a new mold and continued to pour molten iron.

But at this time, Master Xi directly took off his shirt and said loudly to Wang Kang: "Master Kang, I want to personally test whether this refining is as hard as iron as you said!"

"Ha ha!"
Chapter completed!