Walking into the steel plant, in Yunyi's sight, a number of iron-making "soil" blast furnaces rise from the ground, most of the "soil" blast furnaces are in a working state, billowing smoke rises from the "soil" blast furnace, making the sky a little gloomy, and the molten iron flows out from under the "soil" blast furnace, which is the pig iron smelted by the "soil" blast furnace.

Pig iron is an iron-carbon alloy with a carbon content greater than 2%, pig iron is hard, wear-resistant, good castability, but pig iron is brittle and can not be forged, pig iron in addition to iron, but also contains carbon, silicon, manganese, phosphorus and sulfur and other elements, these elements have a certain impact on the performance of pig iron.

At present, the iron and steel plant can produce 6,000 catties of pig iron per day, in fact, the pig iron output will be greater, but the iron ore use of manual mining efficiency is relatively slow, it is difficult to provide more iron ore for the iron and steel plant, only when the steam-powered mining equipment and gunpowder (explosives) are put into use, the mining efficiency of iron ore can be effectively improved.

Pig iron has a lot of functions, the most important role is to make an iron pot, but Yunyi does not need pig iron very much, and now Yunyi needs steel the most.

In addition to the "earth" blast furnaces for ironmaking, there are also some steelmaking furnaces that are lower than the "earth" blast furnaces, but since the start of the steel plant, steelmaking has not been carried out, and the steelmaking furnaces have been put aside.

At present, the Dali Empire and even other countries on the land of Shenzhou widely use the block refining method, and then to create a sharp sword, the block refining method will gradually develop to the point of 100 steelmaking, under normal circumstances, the steel used to build a good weapon needs to go through hundreds of times, thousands of times of folding and forging.

The basic method is to heat the pig iron into semi-liquid and liquid form, and then add iron ore powder, while constantly stirring, using iron ore powder and oxygen in the air to remove part of the carbon in the pig iron, so that the carbon content in the pig iron is reduced, slag is removed, and the steel is directly obtained.

However, the steelmaking method of Qingshan Iron and Steel Plant is a more advanced steel filling method than the steel frying method, and the steel filling method is a little more than the steel frying method, and the most important thing is that the steel filling method is easy to master, so Yunyi came up with the steel filling method.

For Yunyi, the importance of steel is countless times greater than pig iron, only by refining steel, can we manufacture qualified steam engines and other machinery, in order to manufacture firearms, refining steel is a vital thing, but Yunyi and even Yun's hands lack relevant technical personnel, Yunyi can only go out in person.

Yun Yi, Yang Yuan and his entourage walked in the steel plant, looking at the orderly interior of the steel plant, Yun Yi nodded with satisfaction, ironmaking and steelmaking are high-risk industries that are prone to accidents, and only by formulating strict rules for the people below to abide by can the possibility of accidents be reduced.

The number of workers in the steel plant is as many as hundreds, mainly young and strong, and there are also middle-aged and elderly people in the middle, these young and strong people used to be farmers, and now they are responsible for all kinds of hard work, and those middle-aged and elderly people are basically blacksmiths, but now they are skilled workers in the steel plant.

Yunyi lacks technical talents, which is something that cannot be solved in a short time, but blacksmiths have been dealing with iron all their lives, and some things may not be clear, but they know in their hearts that it is more suitable for them to become workers in steel mills.

In front of each "earth" blast furnace, there are middle-aged and elderly skilled workers directing several or even more than a dozen young people to complete the steps of blast furnace ironmaking.

Yun Yi and his entourage walked around the steel plant, and finally returned to the gate of the steel plant, Yun Yi turned around and said to Yang Yuan in a deep voice: "Ji Chang, you have done a good job, continue to keep it up, there must be no carelessness, one mistake may lead to the destruction of many families." ”

Hearing Yun Yi's words, a trace of cold sweat broke out behind Yang Yuan's back, and the complacency in his heart dissipated.

"If you obey the Lord's teachings, you will be careful."

Yun Yi's eyes looked at the inside of the steel plant, and then shook his head slightly, not knowing what he was thinking, but saw Yun Yi say to Yang Yuan again: "You go and prepare, tomorrow we will start steelmaking." ”

Yang Yuan: "No." ”

……

The next day came, Yun Yi, who had rested for a night in Qingshan Town, came to the steel factory again, and behind Yun Yi was Yang Yuan and Li Xiu, who had almost recovered physically.

The group walked towards a steel-making furnace, Yang Yuan had already handled the preparations before steelmaking, and there were dozens of people standing near the steel-making furnace, nearly half of them were young people who had no skills, responsible for hard work, and the rest were blacksmith-born technicians.

Among these people, two people standing together are more eye-catching, one is a middle-aged man with a sturdy body, who looks less than forty years old, and the other is a burly young man, not yet twenty years old, standing together like a father and son, and the appearance is somewhat similar.

In fact, the two are a father and son, the father's name is Xu Fang, Chinese New Year's Eve, and the son's name is Xu Liang, the character Xiaoxian, eighteen.

Under normal circumstances, it is impossible for ordinary people like blacksmiths to have words, but Xu Liang, who was born as a blacksmith, has words, but there is a reason for it.

Xu Fang originally didn't want his son to follow him to make iron, he wanted Xu Liang to read and write, Xu Liang was indeed literate in reading, and he had a table of words, but he didn't have much enterprising heart, he watched his father strike iron since he was a child, Xu Liang also wanted to become a blacksmith and continue to make iron, and when Xu Liang grew up, Xu Fang couldn't change his son's mind, so he could only learn to make iron with his son.

So there was a strange thing in the blacksmith who could read.

However, Yunyi values Xu Liang's wonder, and is ready to train Xu Liang, maybe he will be an important technical talent in the future, after all, Xu Liang is still young, and his thinking is not fixed, and he can become a talent if he trains him well.

Under the gaze of Yunyi, an old technician instructed Qingzhuang to add wrought iron as material iron to the steelmaking furnace, and then ignited the coal to heat, and waited until the wrought iron melted, the pig iron plate was placed at the mouth of the furnace, because of the high temperature, the pig iron plate also began to melt, and then there were young people who used fire tongs to clamp the pig iron plate to move left and right, and constantly turned the iron, so that the iron was evenly poured into the pig iron liquid......

Yunyi has written out the steps of the steel filling method before, and everyone is proceeding step by step according to the steps, but fortunately, the steel filling method is easy to operate, and there are no major accidents.

Note 1: Black powder can be used as both gunpowder and explosives.

Note 2: Pig iron and wrought iron are only a matter of how much carbon they contain, and they are easily converted.