At the behest of the dwarven brothers, the stonemasons rebuilt a strange iron-making furnace.

For the next few days, Donner was almost there.

There is no iron ore on Cancer Island, so naturally no iron is produced, and the iron ingots used in the weapons created within the liberation group are all from the trade with the Earl of Elinor.

Each time, after Theodore shipped the porcelain to the Holy Light Continent for sale, the silver coins sold were explained to Donner, and a large number of iron ingots and other supplies that Cancer Island lacked.

The fiefdom of Earl Eleanor was home to a small iron ore mine that was smelted into pig iron ingots in an iron-making furnace, and then mostly procured by Cancer.

The pig iron ingots smelted in Eleanor's Court have a high carbon content and a hard and brittle texture, but they lack toughness and have almost no plasticity, so they may be barely usable to make cold weapons.

However, it is not possible to make the barrel of the arquebus, and the blacksmiths must first repeatedly burn the pig iron ingots and forge them to temper the impurities in the pig iron ingots, and reduce the carbon content in the pig iron, which is close to the carbon content of steel.

Forging pig iron into steel by hand is often difficult. Not only does it take a lot of time, but you can only get 100 steels that can be used.

Such a barrel made of 100 steel into an arquebus may be used, but it is not possible to make it into a cannon.

The amount of gunpowder required for the firing of artillery is not known to be many times that of arquebuses. A large amount of gunpowder burns and explodes in the barrel, and the power produced is enormous.

If steel is cast with steel that is not hard enough, not tough, and does not have the carbon content to meet the standard, it is easy to explode when the gun is fired.

So, for now, the artillery that obstructed Donner's mind has been restrained by steel.

Instead of building a blacksmith's shop, the furnace was built in two new houses, which were built in one piece, so that the house was larger than the blacksmith's shop.

In order to keep the artillery secret, Donner listed this place as a forbidden place on Cancer Island, and other idlers were not allowed to enter this place without an order, and at the same time sent a small team to guard it.

Donner stood in the house he named the cannon foundry, watching the dwarven brothers and the two apprentices go about their lives without disturbing.

Anderson used to be a knight, and after so many years as a blacksmith, riding and swordsmanship may be unfamiliar, but blacksmithing has become more and more proficient and interested.

Being able to witness the blacksmith skills of the dwarves, how could Anderson miss such an opportunity, so at this moment he was full of interest to help.

The charcoal fire in the iron-making furnace was burning vigorously, and the dwarven brothers instructed the short apprentice to put pieces of pig iron ingots into the furnace, and the tall apprentice pulled the bellows to increase the fire.

Soon, the pig iron ingots slowly turned red in the melting furnace at a height of more than 1,000 degrees. As the temperature continues to increase, the pig iron begins to melt and turns into a liquid.

When most of the pig iron ingots had melted, the dwarven brothers shouted, "Hurry up and open the iron mouth." ”

The tap spout was like a crane's beak, and there was a valve connected to the furnace, and when Anderson heard it, he hurried over and opened the tap spout as Urus had ordered.

The reddish molten iron flowed down the iron mouth into a large dark basin below.

The two dwarven brothers worked well together, Urus pulled a bellows next to the pool of iron, while Qinglus stood on a high platform, holding a long iron rod, constantly stirring in the molten iron, and from time to time sprinkled a handful of powdery things into it.

The room was steaming, several blacksmiths were sweating profusely, and even Donner, who was standing in the distance, was soaked in sweat.

Looking at the dwarven brothers' steelmaking methods, Donner always felt familiar.

By the way, the method of frying steel! Donner's mind flashed.

As the name suggests, the steel frying method is like stir-frying, constantly stirring the molten iron in the smelting.

The biggest difference between pig iron and steel is the carbon content, iron with a carbon content of more than 2% is called pig iron, and less than 0.05% is called wrought iron, and the carbon content of steel is about in between.

The principle of frying steel is to heat the pig iron to a liquid or semi-liquid state, and use blast or sprinkle concentrate powder to oxidize the silicon-manganese carbon in the pig iron, and reduce the carbon content of the pig iron to the composition of steel and wrought iron.

Generally speaking, using the frying method, most of the obtained steel is low carbon steel and wrought iron, which need to be forged to become steel for making artillery. But if you have an experienced old blacksmith who controls it well, you can also get medium carbon steel and high carbon steel.

The two dwarven blacksmiths are very skillful in their movements, and it seems that they should have quite a lot of experience.

Qinglusi kept stirring the molten iron, staring at the changes in the molten iron pool with his eyes, and after a while, he yelled, "Big brother, okay, hurry up and open the pool." ”

There is also a tap hole next to the pool, and clay molds are placed on the side, and the molten steel is injected into the mud mold under the control of the valve, and it is quickly cooled at room temperature and solidified into pieces of steel ingots.

Donner was amazed on the side, but he didn't expect that the dwarves had actually mastered the method of frying steel.

It is no wonder that on the Holy Light Continent, the dwarves are known as natural blacksmiths, and the weapons created by the dwarves have always been famous for their sophistication, and are sought after by countless mercenaries and aristocratic armies.

With the frying method, it is possible to produce a large number of high-quality steel ingots, and the weapons created are not only sophisticated, but also save much time compared to manual forging.

In fact, Donner didn't know the name of the steel frying method, but he knew what it was for, and he didn't know how to operate it, so he just thought about it at the time.

I didn't expect that on Cancer Island, there were actually two dwarf blacksmiths who could fry steel, which ...... I really picked up a treasure.

A furnace of pig iron was quickly smelted into steel ingots, and several people were tired.

Because he was forbidden to drink during working hours by Donner, Urus could only pick up the kettle at his waist and take a sip of water to quench his hunger.

He picked up a steel ingot from the ground, smashed the clay mold, looked at it casually, and muttered, "It's okay." ”

Calm as Anderson, after taking the steel ingot that flashed with this metallic light, he couldn't help but say: "It's really a steel ingot, I didn't expect it to be able to make steel like this, the dwarf clan is really powerful." ”

Donner smiled happily and walked over: "Two masters, hard work, enough wine tonight." ”

Qinglusi jumped off the high platform, his eyes lit up: "Really, the head of the group, don't lie to us." ”

Qing Lus tied his beard into pigtails today, which is funny and very cute.

Donner looked at his arrogant appearance and replied with a smile: "I really don't lie to you, the head of the group never lies." ”

"yes, there's wine again. Qinglus almost jumped with excitement when he heard Donner's promise.

Donner was speechless, and he didn't know where the dwarven people's thirst for alcohol came about.

"That's right!" Donner then asked Urus, "Master, I wonder if this is called the steel frying method?"

Urus looked confused when he heard this, and shook his head, indicating that he didn't know.

Donner patted his head and secretly scolded himself for being stupid, the steel frying method is the earth's saying, but it doesn't have to be called this in the dwarf race.

Well, whatever he does, as long as he can make a lot of steel for casting cannons.

And after Anderson put down the ingot, he couldn't help but ask the two dwarves on the side for advice on the principle of this method of frying steel.

Donner interjected two sentences from time to time, putting forward his own opinions, and the result was so happy that he accidentally brought out the steel filling method with a leak.

This made Urus's face full of shock, and he pointed at Donner in surprise: "You...... How do you know that this is our dwarven race's biggest top secret? ”

Donner looks innocent, can I say what I see on Baidu?