The earthen blast furnace used by the Grey Rabbit tribe for ironmaking is located in the corner of the artisan area.

Such a furnace that was nearly three meters high, except that they had completely surrounded it with a makeshift wall, blocking all prying eyes.

On top of the earthen blast furnace, a high roof was built to protect against rain.

Even, if they weren't worried that the wooden roof would be burned by the flames coming out of the blast furnace, they wanted to hide the earthen blast furnace in the wooden house.

In addition, there are more than two hunters at all times, guarding the area around the artisan area twenty-four hours a day.

Anyway, no one else, including anyone other than the craftsman of the tribe, was allowed to approach this place.

Because they feel that no matter what kind of production technology in the artisan area is spread, it will be a huge loss to the tribe.

And they, the managers of the tribe, will be the sinners of the entire tribe......

In such an environment, Song Yong saw the earth blast furnace that was strictly protected, as well as the products refined in the three attempts of Liuzhi and others:

That kind of black lump, when you take it in your hand and knock it lightly on the ground, it breaks into two pieces of waste.

Whatever the problem, these black things are too brittle to be of any use, let alone used to make tools.

When Song Yong was squatting on the ground, fiddling with the leftover scraps from the previous few times, the words of the six-finger explanation were narrated in Song Yong's ears.

Kind of an introduction, the problems they encountered in the three attempts:

"Brother Yong, we are all strictly following the methods and steps you said, trying one by one, but every time we can't wait for the iron ore in the blast furnace to be completely burned into molten iron, the furnace begins to crack a big gap. ”

As he spoke, Six Fingers pointed to a slit on the blast furnace that was more than a meter long and as wide as a child's grinning mouth.

On the periphery of the stove, it was obvious that there were several loops of wire.

It is estimated that all the iron wires that Song Yong brought over by the way a few times before were cleaned.

"The third time we built the furnace, we used wire to wrap it around a few times in order to make it stronger, but in the end it didn't work, and even when the furnace cracked, we almost burned a few craftsmen. ”

Throwing away the scrap in his hand, Song Yong began to check around the stove.

Frankly speaking, six fingers and other craftsmen have spent a lot of effort to successfully smelt qualified iron materials in this iron-making earthen blast furnace.

The three-meter-high earthen blast furnace is built quite well with yellow mud as the main material.

Even the manual blower box that blows air when smelting iron in the earthen blast furnace is also made with animal skins and planks, and it is made in a good way.

When the circle was over, Song Yong didn't find any mistakes by Six Fingers and others.

Then it seems that all the problems should be in the technical support provided by themselves.

Even though Song Yong didn't want to admit such an embarrassing fact in his heart, he still took off the backpack behind him and found a cheat book from it.

Yes, it's the cheats, a cheat book for local steelmaking.

There is no mistake at all, and there is no need for the slightest suspicion.

Originally, Song Yong planned to download a copy of the steelmaking materials for free on the Internet, but he took the second-hand computer and tossed around for a long time without a detailed information.

So, you can only pay for one copy.

And if you buy a complete set of steelmaking materials, there are quite a few versions in bookstores and on the Internet, and even the latest microwave steelmaking technology can be bought.

The problem is that these things are completely useless dragon slaying techniques for the current Gray Rabbit Tribe.

In the end, it was Song Yong who found an antique gadget on Xianyu, which can be said to perfectly meet Song Yong's requirements.

It was a book published 62 years ago, that is, in the eighth year after the founding of the People's Republic of China, by the then Hunan Provincial Economic Construction Exhibition: Local Industry Small Series - Soil Method Iron Smelting.

It was a very distinctive product of that special era at that time.

The iron-making technology introduced in it is a little bit of soil.

However, the requirements for operation and materials are also extremely low, and it is this technology that is earthy, and it is also a proper alien black technology for the primordial plane.

So Song Yong did not hesitate to spend eighty yuan to buy this half-used and thin, thin antique.

So, when Brother Yong flipped through this secret book that had been around for some years, and carefully looked at the mysterious and incomprehensible content on it, Six Fingers and other craftsmen subconsciously held their breath.

Even in their conceptions, there is no such thing as respect for knowledge.

But when they looked at Brother Yong and the thin thing in his hand, there was only longing and respect left in their eyes.

Even, they all wanted to face the small series of local industrial books that they couldn't understand at all-Tufa Iron Smelting, and they fell to their knees reverently.

Because they all know very well that what is recorded in it is the precious inheritance of ironmaking, and in their eyes this is the most precious thing in this world......

Not to mention! After a cursory look at it last time.

This time, Song Yong spent half an hour carefully browsing the contents of the cheats, and really found out what he had missed.

The reason for all this lies in the most important refractory material in the furnace.

In a sealed environment, there is also high-quality anthracite as a combustible material, which can produce this amazing heat.

However, using yellow clay as a material, the stove that has been pasted up can withstand this high temperature, and it is strange that it does not crack on the spot.

Don't talk about six fingers and others, the way of wire reinforcement is adopted.

Even if you come with a wire rope bundle, such a fragile earth blast furnace will still crack.

And when the blast furnace cracked, there was no big explosion with heavy casualties, which was already a very powerful result blessed by the ancestral spirit of the Gray Rabbit tribe.

As for the solution, Song Yong also found the relevant content in the cheats.

That is to use the earth method to make some refractory bricks, and put them on the innermost layer of the earthen blast furnace to isolate the incredibly high temperature in the furnace.

The specific method is to knock quartz, a high-temperature resistant material, into powder and add a large amount of it to the yellow mud.

In the end, the fired bricks will have a good high temperature resistance, at least on the inside of the furnace, that is, there will be no need for this thing to crack.

As for the natural refractory material of quartz, Song Yong clearly remembers that not far from the big lake, there is such a place where a large number of people exist.

There's no need to venture deep into the mountains and forests to find it.

After putting away the cheats, Song Yong, who found a solution, had enough confidence in his heart.

He looked forward to the six-fingered craftsmen and said loudly:

"I don't have to be miserable, I know what's going on, this stove is missing a material called refractory bricks, let's get this thing out and build a new blast furnace to try. ”

"Okay, why don't we go right away and make those refractory bricks first?"

After hearing this, Six Fingers hurriedly asked.

It seems that the matter of iron-making is about to become a problem for this little old man, and if he can't get it out sooner, it is estimated that this thing will not even be able to sleep.

For this reason, Song Yong also simply agreed: "It's okay, you call a dozen slaves and follow us to find the materials back." ”

After finishing speaking, Song Yong walked out of this heavily guarded place.

Then he saw the scene of the scoundrel and his wife, Pea, plus the little cub who was not more than a few months old, sharing the screw powder he didn't want.

The two of them were tossed to the point of choking by the spicy snail noodles.

What is inhumane is that they have not yet picked up a red rice noodle and stuffed it into the mouth of their little cub, and when the little cub screams at the spicy wow woh, the two guys show a kind smile.

It is estimated that they think that enjoying such good things is indispensable to their own little cubs.

After seeing such a scene.

For the first time, Song Yong strongly felt that it was not easy for the little cubs of the primitive era to live to adulthood.