Carrying a bamboo basket on his back, he came to the river.

Lu Yu quickly found the point where he took the soil when he built the earthen kiln last time.

Because it just rained the other day.

The soil layer is much looser.

In a short time, a basket was deducted.

"Copper smelting requires charcoal, and in addition to temperature, there is another important reason-"

After arranging the carrying belt, Lu Yu carried the bamboo basket filled with clay on his back.

Walk through the muddy clay layers in one fell swoop.

Say as you walk:

"That is, charcoal can be used as a reducing agent. ”

"It reduces the copper from the copper oxide very well. ”

And this is also the key to the smelting of copper by fire. ”

"This method has been around since ancient times, and to this day, there are still many professional smelters who choose high-quality charcoal for their operations, and this is the reason for this. ”

"Charcoal is indispensable if you want to separate the copper from the mineral powder. ”

"Therefore, how to obtain better charcoal has become the first thing we should consider at the moment. ”

Speaking of which.

Lu Yu pretended to pat the bamboo basket behind him mysteriously.

He motioned to everyone: "This clay can help us." ”

"With it, we can try to build a charcoal kiln that can be used repeatedly, and with a charcoal kiln, the problem of charcoal fire will be solved. ”

The primitive technologies that Lu Yu talked about have never been heard of for the vast majority of people in front of the screen.

While curious, the audience was also in a fog and kept asking questions in the barrage.

Seeing that everyone was so enthusiastic, Lu Yu smiled and explained:

"It may be complicated to say, but it's actually very simple, don't worry, you'll see it later. ”

......

After returning to the camp all the way, putting down the clay, Lu Yu went directly to the storage room, took a lot of firewood and piled it up next to the earthen kiln.

I chose an open space about the size of the kiln and began to plan.

"This is it. ”

"The first step is to pile the firewood into a cone. ”

Lu Yu said and did at the same time.

It took less than five minutes to pile the firewood prepared in advance into a slender pyramid.

"Eucalyptus twigs are a very good raw material for making them, and with the right handling, the charcoal will be perfect. Both hard and durable. ”

"Of course, if you use ordinary tree branches, you can also use it, but the effect will definitely be greatly reduced. ”

Once the pile is initially large, the next step is to add firewood in a circle according to this shape.

This job seems quite simple.

But in reality, it is very particular.

Leave enough clearance but not too loose.

Because the stacking of the wood pile will directly affect the success of firing.

If the gap is too large, it will be difficult for the branches to burn sufficiently, and the yield will be greatly reduced.

And if it's too loose and burns too much, it's not okay.

In order not to affect the yield rate, it took Lu Yu more than half an hour to complete the process of stacking the wooden pile.

The pile is about a little over a meter high.

It covers an area of almost two square meters.

The bottom end is rounded.

From a distance, it looks a bit like a fire, but it's more elaborate than an ordinary fire.

The branches are next to each other, very neat.

"Alright, almost......"

"Now that you have the piles, the next thing you have to do is to use clay and enclose them one by one to make them into a kiln-like shape. ”

"It should be noted that the mud layer does not need to be too thick, it is about the same as the palm of the hand, and try to keep it in the range of one to two centimeters. ”

The clay by the stream is just right.

There is no need for secondary processing, and it can be used directly.

Saves a lot of work.

If it's dry clay, it's busy.

Just the link with mud is enough to torture people.

After a few more brief conversations, Lu Yu got busy again.

Pull the basket to your side, take out the clay, and pile it up one by one along the edge of the pile.

It's like building an earthen kiln.

There was nothing to say about the whole process, and it wasn't until he was about to seal the mouth that Lu Yu spoke again:

"At the top of the charcoal kiln, there needs to be an opening, which cannot be completely sealed. ”

"The size of the opening depends on the size of the pile, there is no established standard, just grasp it yourself. ”

At this point, the prototype of the entire charcoal kiln is ready.

From a distance, it looks like a small dirt bag.

Very interesting.

But that's not all.

A complete charcoal kiln also needs to open a vent at the bottom and plan out the "door line".

The vent is to facilitate the observation of the burning speed of the charcoal, so as to facilitate timely blocking.

The door line, on the other hand, is so that after the charcoal is burned, the kiln wall can be easily lifted and the charcoal can be taken out.

These two details are equally crucial.

Especially the vents on the chassis, there is no impossible.

......

At the bottom of the charcoal kiln, after deducting four vents, Lu Yu took out a stone knife and painted an arched arc in the kiln.

"Feather God, what is this for?"

"Hell knows!"

"Immortals?"

"Do you know this?"

Glancing at the barrage, Lu Yu shook his head and explained:

"Brothers, this is the goal line. ”

"When the charcoal is burned, the walls of the kiln become very hard, so it is a technical task to take out the charcoal without damaging the kiln itself. ”

"So, the goal line has a place to use. ”

"When the time comes, as long as you gently pick it with your hand, the kiln wall will collapse along the contour of the door line, which is very convenient, and the most important thing is that it will not affect the subsequent use of the kiln. ”

When the audience heard this, they suddenly realized that Lu Yu was a little clever ghost!

“6666！”

"Show!"

"Plan ahead!"

"It makes my scalp tingle!"

......

After the charcoal kiln was completed, Lu Yu took the fire from the fire, placed it in the opening above, and lit the wooden pile wrapped by the charcoal kiln.

Holding on to the kiln wall, Lu Yu endured the smoke while blowing to support the combustion, squeezed his eyebrows and said:

"At that time, the fire will burn down from the opening, in the opposite direction of the updraft, and after a period of burning, when the fire moves from the top to the bottom, the firewood in the kiln will be converted into charcoal. ”

By the time the fire had fully spread, the fire above the pile was getting bigger and bigger.

Seeing this, Lu Yu went on to explain:

"The flame above the pile is a volatile gas, CO and H2 are burning, and if you can see these gases, it means that the temperature inside the kiln is changing, which is normal. ”

As he spoke, Lu Yu controlled the drone again and let it fly to the bottom vent of the charcoal kiln.

"During the whole firing process, there is nothing to pay special attention to, but one thing to pay attention to is that every once in a while, you must observe the vents, if you can see flames at the vents, you must block all the air inlets with clay as soon as possible, including the openings at the top of the charcoal kiln, and wait until the temperature is completely cooled, and the charcoal will be burned. ”

“666666！”

"Damn, the anchor is so professional!"

"Brother steady!"

"I'm very curious, where did Feather God learn this strange knowledge?"

"It's kind of interesting!"

"The volatilization of gray fertilizer will turn black, and give it to the anchor plane× 1—— is amazing!"

"The invincible middle two ghost beast big demon king gave the anchor energy drink × 1——666, it's too cheating!"

......

Thank you for the gifts.

Lu Yu took a breath and wiped the beads of sweat from his head: "Burning charcoal is very time-consuming, even if everything goes well, it will take at least five or six hours. ”

"We have to make good use of this time. Brothers, I'm going to show you something funny, Comeon!"

Nani?

Fun stuff?

After listening to Lu Yu's words, the audience instantly came to their senses, and kept sending barrages:

"What's the situation? Fun stuff?"

"Handstand shampooing, or a five-speed electric fan?"

"Whole job?"

"Anchor, please start your sassy show!"

Soon.

Lu Yu pulled out a eucalyptus tree more than one meter long from the firewood pile in the storage room.

Then, return to the campfire again and sit on the floor.

After putting the eucalyptus branch in his hand in front of his eyes and looking at it carefully, he decisively took out a stone knife, peeled off the bark, and fanned the bonfire.

"By fanning the bark, you can raise the temperature of the campfire......"

Before Lu Yu finished speaking, the audience in the live broadcast room became noisy.

I feel like I've been tricked by the feather god......

"That's it?"

"Streamer, it's not fun at all......"

"Fanning the flames?"

"Something?"

"Brothers, I don't think it's that simple. ”

......

Lu Yu didn't pay attention to the barrage.

While inciting the bark, he continued:

"This is the principle of the blower. ”

"Using this principle, we can instantly increase the temperature of the fire by several notches!"

As he spoke, Lu Yu took care of himself and used a stone knife to split the bark in two.

It becomes two rectangles about 20 centimeters long and 5 centimeters wide.

Then.

He cut a 2.5-centimeter gap in the middle of the rectangular bark and put the two gaps together.

Then.

The bark becomes a cross fan blade!

After showing it to the camera a little, Lu Yu casually took a small straight wooden stick.

With a stone knife, a cross-shaped opening was made at the top of the stick, and the fan blades were fixed to it.

Strain with rope.

In this way, a simple fan in the shape of a cross is ready.

Immediately after, he placed the fan in front of him.

Clamp the stick with both hands, use it as a shaft, and rub the stick back and forth by drilling wood for fire.

In contrast, the wind power of the fan is much stronger than the bark of a tree.

As the fan turned, the charcoal fire in front of him turned red and darkened.

The temperature rises sharply.

At this time, Lu Yu finally opened his mouth:

"This is the most primitive blower. ”

"It's simple, but it's very practical. ”

"It is precisely with this thing that primitive people really learned to 'play with fire' and master the technology of smelting metalware. ”

At this point in the live broadcast, the audience suddenly realized that they finally understood the meaning of Lu Yu's words.

It turns out that this guy is going to build a blower!

"Anchor, you're really awesome!"

"Thief 6!"

"A terrific character like Yushen, if you travel back to the primitive era, you can become a god in minutes!"

"Damn, I have to watch and study hard, in case I cross over, I can use 233333"

"Brother, you just have to be soft with your sister-in-law, why bother!"

"Hahahahaha, I rolled out of bed laughing!"

"If the feather god had been living here for ten years, he would have been able to build a gun, right?"

"Be confident, get rid of it!"

......

Set aside the cross fan blades.

Lu Yu took some clay from the bamboo basket and threw it on the stone slab in front of him.

First, it is kneaded into a round mud cake.

Next, he took more mud and rubbed a few sticks of mud.

Round and round.

Carefully enclosed around the edge of the mud cake.

When the mouth was finally closed, a long strip of "air outlet" was deliberately set aside.

It looks like a gourd scoop.

The only difference is that the bottom is flat as compared to the scoop.

"This thing that looks like a night pot is actually the shell of a blower. ”

"Of course, this is just a prototype, and we need to go into more detail next-"

"666, is the night pot okay?"

"It's a live stream with flavor!"

"Feather God: Next, I'll show you how to use this night pot!"

"Yes, it does smell like that!"

"I have a bold idea!"

"Kind of like Peppa Pig!"

"What a night pot, it's actually a button!"

", brother, don't talk about it, I'm eating!"

......

After looking at the strange barrage, Lu Yu smiled bitterly and said, "Brothers, can you stop talking about this kind of flavorful topic...... I almost believed it. ”

As soon as I finished speaking.

In the live broadcast room, there was another burst of laughter.

It took a long time to end the topic.

Subsequently.

Lu Yu used some mud to enrich the outer wall of the fan and make it more rounded.

Then, in order to facilitate the entry and exit of the drill pipe, the bottom of the mud cake also needs to dig a round hole slightly smaller than the palm.

The function of the blower is to fan the wind and ignite the fire, increase the firepower.

Therefore, the air outlet also needs to be put a little more thought.

in order to concentrate the wind.

Therefore, in the end, Lu Yu made another big move.

The spout was extended by a few centimeters to create a funnel-shaped cylindrical shape.

"Hmm...... If conditions allow, it is best to fire it, which will be more durable. If you don't have that condition, you can also use it directly, but before use, it is best to dry it by the fire. ”

After speaking, Lu Yu took the fan blades he had made before and put them in the fan shell.

And turned the shell upside down.

At this time, the drill pipe on the fan blade can just pass through the round hole at the bottom.

As long as the drill pipe is rubbed, the wind generated by the fan blades can be blown out along the spout of the fan, and then heat up the fireworks!

Followed by.

In order to prove the feasibility of the fan, Lu Yu held the drill pipe tightly and roughly demonstrated it to the audience.

"Huhuhuhu——!"

As a result, as expected.

With the rotation of the fan blades in the fan, the flame of the bonfire will burn more and more, and it will make a whirring sound from time to time!

Seeing this scene in front of them, the audience's eyes lit up and they launched a barrage one after another:

“666666666666666！”

"Digging grooves, and such an awesome operation!"

"Nima, the blower is made!"

"Anchor, you were the leader of the Mingjiao Fire Banner in your last life, right?!"

"Blind my titanium dog's eyes!"

"Awesome!"