Bruce took several blacksmith apprentices to work, and the slaves pushed a cart to send hundreds of kilograms of weapon scrap into the blast furnace. The blast furnace heat wave is rolling, and the temperature of the whole blacksmith shop is at least 50 degrees.

Bruce, with his bare arms, wrapped a piece of cloth around his crotch and directed the people to heat the blast furnace. Because there is no coal here in sulun, the blacksmith shop uses charcoal for heating.

The heat provided by charcoal is limited, only 700 degrees. Of course, this is in an open environment. If the maximum temperature in the furnace can reach 900 to 1000 degrees, and the temperature required for steel smelting is at least 1000 degrees, bellows blast is needed to support combustion at this time, so as to reach the ironmaking temperature.

Su Lun doesn't know much about ironmaking, but he remembers that heating the air in advance and injecting it into the ironmaking furnace can increase the temperature of the furnace by about two Baidu. In this way, the temperature of the ironmaking furnace can reach one thousand two Baidu, which is not much lower than that of using coal.

In fact, although using coal for ironmaking has many advantages, such as fast ironmaking speed, high output and low cost, it has a serious defect, that is, the sulfur content of coal is high. Most coal has high sulfur content. If it is used for ironmaking, it will also contain sulfur in iron, which will cause a serious consequence, iron becomes brittle.

The quality of iron decreases, and the forged weapons can't be compared with sulfur-free weapons at all. When cutting, they will even break directly. No matter how low the cost is, it can't make up for this.

After all, no matter how low you spend, the things you buy can't be used, then the money is worthless.

As for steelmaking, Su Lun also only knows a little. The difference between steel and iron lies in the carbon content. More carbon is iron and less is steel. If the carbon content is too low, it is wrought iron, but Su Lun really doesn't know the specific proportion.

"I knew that I would cross all of them, and I should make complaints about them."

Although I don't know the specific carbon content of steel and iron, Bruce has some experience as an experienced blacksmith. Under the leadership of Bruce, several blacksmith apprentices lay out first-class anvils and beat the melted ingots after heating.

This method of repeatedly beating and heating iron ingots is to forge steel. After repeated exercise of iron ingots, it is called one refining. This operation is called one hundred steelmaking after repeated hundreds of times. It is also the best steel on the market. The weapons forged with this kind of steel are the elite of the elite. In the kingdom of Florence, most of the weapons and armor used by the army are usually refined in the thirties.

Of course, there are also better weapons than this kind of hundred steelmaking, that is, the weapons made by dwarves. Of course, although dwarves have higher technology than humans, it is also difficult for dwarves to forge hundred steelmaking, but they have other unique secrets.

After seeing the normal production of the blacksmith shop, Su Lun began to look for ideas to make money. The territory has been put into no output, which is also a great pressure on Su Lun. When Johnson left, Su Lun gave him 100 ginals, and now he has only 200 ginals left in his hand.

There are also some things in the storage space, two pieces of refined iron, some gemstones, and two silver treasure boxes. Gemstones are the reward for defeating the aborigines last time. Su Lun checked that most of these gemstones are of average quality, only two of which are of good quality. They can be sold to gem merchants for up to three or four hundred gold coins. This gold coin is estimated to be spent in a month.

It is estimated that it will take at least two years to be self-sufficient from the territory and have an income. At the thought of here, Su Lun wants to rob the dragon's treasure. It is said that the dragon is very rich. Of course, he can only think about this idea. Not to mention that the dragon is rare now. It is the strength of the Dragon itself, and it needs legend to fight it at least.

"By the way, there are still two treasure chests left open." Su Lun chose to open the treasure chest.

An aura flashed, the treasure chest disappeared, and a systematic prompt sounded in my ear.

"Congratulations, host. You've got a mechanical control book."

"Congratulations to the host, you have got a bottle of Beidou heavenly jelly."

"Mechanical control? What is this?" Suellen picked up the book and looked through it. The book recorded the manufacturing, principle and use of various machines. After reading the introduction of the system, Su Lun realized that this is also a new skill generated by the integration of system skills into the world.

In the original game, this skill is controlled by machine and iron, which can summon mechanical soldiers such as wooden cattle and flowing horses. However, after arriving in this world, it has become a production machine, and even if you learn it, you can't make wooden cattle and flowing horses. You still need to improve later.

This time, the system is not too deep. It gives the upgrade route. First, you need to upgrade the mechanical control to advanced level, then learn the machine iron secret, and then learn the machine iron secret. After learning the machine iron secret, you need to find an NPC. After passing its test, the peach blossom immortal will get a reward. This reward is awesome. It is actually a puppet magic image making process.

This system actually made the magic image making process of wizards, and directly made some iron men into iron magic images. Su Lun has never seen an iron demon, but his reputation is still known. There is no problem for an iron demon to sweep a knight regiment. Note that it is not a cavalry, but a knight.

Regardless of the puppet magic statue, the peach blossom immortal doesn't know where to find it? In the game, the peach blossom immortal can be found as long as he goes to the peach forest. In reality, where can I find him? The broken system doesn't give a hint.

Although you can't make mechanical puppets, this mechanical control is still useful, such as making some simple mechanical tools to speed up the construction of the territory, and making a hydraulic forging machine and hydraulic blower for the blacksmith shop.

With the hydraulic forging machine, the speed of forging steel can be increased by at least dozens of times. After all, where can manual hammering compare with the machine? Moreover, the hammering speed of the machine is uniform and the force is enough. Originally, he wanted to find some craftsmen for research. Now he can make one by himself by using this mechanical control book.

After learning mechanical control, Su Lun picked up a glass bottle next to him. The bottle contained a blue translucent liquid. With the shaking of the bottle, the liquid inside glittered with a little starlight, which looked very beautiful. This thing is also very rare in the game. Its effect is very simple, that is, to add attributes.

[Beidou Tianjiang: a magical liquid formed by the power of stars. After use, it can enhance strength or physique. After use, the strength or physique attribute is + 3. Only one is triggered each time and can be used repeatedly.]