To build a coke oven, this cement is naturally indispensable, as well as refractory bricks.

Fortunately, the production of cement has been carried out near Luoyang for more than a year, and it has also been promoted in nearby states. The craftsmen have accumulated a lot of experience.

As for refractory bricks, there is no difficulty, after all, copper and iron smelting have a history of more than a thousand years, and they have mastered this technology. It is to use special stones to fire this refractory brick.

And Wu Yanzhi is studying this major, and this thing is pediatrics.

However, it is not easy to design and build a coke oven or steel furnace. Although all Wu Yanzhi needed was a simple coke oven and steel furnace.

It does not use the most primitive soil method of coking, the furnace is not closed, the temperature is not high, and it depends on its own combustion, the quality of coke is very poor, there are many impurities, and the coking rate is low.

The coke oven that Wu Yanzhi was going to build was between the earth-based coking and the mechanized coking of later generations. He demanded that it must be sealed to improve the coke output and coke quality.

The coke oven is composed of a carbonization chamber, a combustion chamber, a regenerative chamber, a ramp area, a furnace top, a foundation, a flue, etc. In the carbonization chamber, the coal is heated to coke under the condition of isolated air.

After seeing the cement kiln, Wu Yanzhi made arrangements and asked them to burn the cement as soon as possible. In addition, the kiln is selected to fire a batch of refractory bricks of better quality.

This refractory brick is mostly made of clay bricks, and China is rich in clay ore. Clay bricks are mainly composed of mullite (25%~50%), glass phase (25%~60%) and cristobalite and quartz (up to 30%). Usually hard clay is used as raw material, calcined in advance, and then mixed with soft clay, molded by semi-dry or plastic method, and fired into clay brick products at a temperature of 1300~1400 °C.

……

Wu Yanzhi returned to the county seat and took out the drawings of the coke oven and converter that had been drawn long ago and looked at them carefully.

These drawings were made day and night during his travels and at home in the past few months. Because he is usually busy and has no time.

His drawings were drawn in strict accordance with the formal cartographic standards, and almost no one in this world could understand them.

Blank paper, charcoal, rulers and compasses, and his homemade protractor.

"Lang Jun, what are you painting?" Li Yin asked beside her, her face was not very good, she began to vomit a little, and after the doctor took the pulse, he said that she was pregnant.

Wu Yanzhi felt that he was lucky, Pan'er and Li Yin were pregnant one after another, which was of course a good thing.

"You can't understand this thing, it's simply a big stove! This one is for burning coal! This barrel-shaped furnace is made of steel!

By the way, you are pregnant, so you should pay attention to rest. Now that the weather is warm and cold, it's easy to catch a cold! Wu Yanzhi spoke softly.

Hopefully she'll have a son! He thought to himself.

Although he didn't particularly like the idea of his son, Li Yin was his wife, and his son was a concubine and had the highest status.

Other people's sons are concubines, of course, if the main wife dies, the stepwife's children are also concubines.

"Lang Jun, the concubine thinks that the house is a little small as a palace, why don't you redesign another house?" Li Yin lay on Wu Yanzhi's back and said coquettishly. She knows that now that she and Wu Yanzhi's family background, no matter how big the house is, it can be repaired!

She has lived in the palace since she was a child, and usually travels very frequently between the East Palace and the palaces in the palace. She didn't buy the house that Wu Yanzhi spent a lot of money on, and she didn't buy it too much.

Actually, that house is not bad. It's just that because there were many people in the family at that time and their identities were different, it was not easy to live in the house that Gu Zhiwen helped to see before. He bought a large house temporarily.

Of course, this house does not match Wu Yanzhi's current status as the king of the county.

"Okay, it's easy to design a house! Come and I'll teach you how to draw a house......" Wu Yanzhi taught Li Yin to draw a picture.

Where does he want to change houses for the time being! He thought that if he became a prince, the court would reward the house as usual, so why spend it himself. That's tens of thousands!

Although tens of thousands of guan is not a big amount for himself, since he wants to be on the throne, this money has to be spent on the blade! It costs money to make subordinates and make friends, so how can this money be used indiscriminately?

……

In the afternoon, Shahe County Post House.

Wu Yanzhi called all his subordinates and county officials to explain to them the coke oven and the converter used for steelmaking.

He first explained the coke oven: "You must also know that the iron made from charcoal will be very brittle and have a lot of impurities.

Therefore, we need to refine this coal first, and remove the things that are not needed in it. It's charcoal and it's coke! And then use this coke to make iron, and it is very good. As you know, this coke is much hotter than charcoal! ”

When he said this, most people could understand it. The ancient smelting technology is nothing more than one word: "burning"!

As for why it was burned, and what was the difference in the chemical composition of gold, silver, copper, and iron, they did not know.

"However, this burning is not a simple matter, there is still a great danger, especially in the gas in the furnace, which can not only burn, but also explode, so what about it......" He first talked about safety.

As for the construction of the furnace, there are naturally craftsmen brought by Shang Fangjian himself, these people are all veterans and have very high skills.

Although they didn't make Wu Yanzhi's furnace, they had built a lot of other furnaces.

These people couldn't understand their own diagrams, but after they were engaged in engineering, after carefully explaining to him a few times, those people suddenly understood.

Finally, when it comes to the converter used for steelmaking, it is a bit troublesome. Although Wang Jin and several officials of the smelting supervisor are all masters of iron smelting and copper smelting, they don't know why this molten iron turns into steel in the converter.

(Steel: Steel, is a general term for iron-carbon alloys with a mass percentage of carbon content between 0.02% and 2.11%. If the carbon content is lower than this, it is wrought iron, such as iron wire. Pig iron is naturally higher than this. ）

As for the legendary technique of frying steel (that is, constantly heating and stirring the molten iron to turn the molten iron into steel), it is said that this technology may not have existed in ancient times. And even if there were, it was probably used by individual craftsmen by chance. Because they discovered that by constantly stirring, pig iron will soften and turn into steel (silicon, manganese, phosphorus, sulfur, carbon, etc., will be constantly reduced, because he will be oxidized).

However, in fact, there is also a problem with frying steel, what tools are used to fry it? Stir-frying while warming? How do you maintain the temperature?

Anyway, in ancient times, the real large-scale steelmaking used the "steel filling method".

This method of filling steel is based on a record that can be found in books.

Let's talk about the steel filling method again: to put it simply, the molten pig iron with a high carbon content is poured on the wrought iron with very low carbon content, and the charcoal in the pig iron will penetrate into the wrought iron through continuous smelting and hammering, so that it becomes steel.

This technology is one of the most outstanding achievements of China's early steelmaking technology. Invented by the famous metallurgist of the Northern Qi Dynasty, Qimu Huaiwen, this person also served as a thorn.

However, it should be pointed out that it can be seen from his steelmaking process that the speed of steelmaking with this method is extremely slow and the output is extremely low.

It is mainly used to craft weapons such as swords. Please Baidu "Throw Book Network" Thank you for your support!