Section 534
The ancient method of copper smelting is actually very simple.
At the beginning, there was no furnace at all. Usually, people would just dig a pit, start a fire, and then throw the ore powder directly into it.
Later, when productivity developed to a certain level, people began to learn to use furnaces in order to obtain better quality metals.
Then.
After pouring in the ore powder, Lu Yu poured a layer of charcoal on it without saying a word.
"The more charcoal, the better."
"The more the better."
"The more charcoal, the higher the temperature, and the better the reduction effect will naturally be. This must not be saved."
As he spoke, the entire furnace was covered with charcoal.
Thick smoke was constantly coming out.
At this time, Lu Yu was not idle either, and hurriedly pulled the drill bow of the blower-
"Hu——!"
"Hu——!"
"Hu——!"
With the push and pull of the bow drill, the bark fan blades in the blower also started to work.
The effect is really good.
The wind is strong and lasting.
In just a short while, the furnace was red.
"Because the fan blades in the blower have no angle, they can provide sufficient wind power regardless of the direction."
"Our current task is to operate the blower to keep the furnace heated up and melt the copper oxide."
"This process will be very long, at least one hour, at most two or three hours, so try harder - try to complete it before it gets completely dark."
As soon as the voice fell.
Lu Yu's hand speed increased sharply.
The fan blades of the blower whirred and kept blowing the red charcoal fire!
Ten minutes later.
When all the charcoal in the furnace turned red, Lu Yu gradually relaxed and rested for a while.
"Hu——!"
After taking a breath, Lu Yu continued:
"Let it burn for a while, and during this time, we will use the remaining clay to make a melting cup."
The melting cup, as the name suggests, is a container used to melt copper.
As long as the reduced copper is put into it and then blessed with charcoal fire, it can be melted into liquid copper.
The production of the melting cup is very simple.
Just add a little clay and knead it.
You can decide the size by yourself, just about right.
As for the method, it is no different from making a pottery cup.
First use mud cakes to make the base.
Then use mud strips to surround the wall.
Finally seal and smooth it.
Very quickly.
In just five minutes, Lu Yu made a delicate small clay cup.
"With the melting cup, the harvested copper material can be turned into liquid copper."
"At that time, we only need to pour the liquid copper into the clay mold, and the stone axe will be roughly formed..."
After speaking, Lu Yu returned to the furnace and checked the fire.
The furnace was ablaze.
Burnt carbon ash was everywhere.
Seeing this, Lu Yu poured a lot of charcoal into it without saying anything, and then picked up the drill bow again and pulled it frantically-
"Hu——!"
"Hu——!"
"Hu——!"
...
Unconsciously.
The gloomy sky became a little darker.
The wind was getting stronger and stronger.
The wind rustled the woods.
Soon, more than half an hour passed in a blink of an eye.
The newly added charcoal also began to fade from red.
Noticing this, Lu Yu put down the bow drill and looked inside the furnace.
At this moment, a thick layer of charcoal ash had already accumulated below.
Slag of all sizes was clearly visible.
"Brothers, we should be able to open the furnace."
"First find a hard object and poke through the door line to see--"
After happily reporting the results of the smelting to the audience, Lu Yu took out a stone axe, aimed at the hard soil at the door line, and chopped it randomly.
"Hua La La--!"
Then, there was only a hua La La sound.
Countless residues and burnt charcoal rolled down from the door opening.
Scattered all over the ground.
Seeing this.
Lu Yu picked up the pottery jar and poured some water on it.
"Zi Zi--!"
The next second.
The steaming white air rose up and soon blocked everyone's sight.
Then.
After the residue was completely cooled, Lu Yu picked up the melting cup and leaned over to search in the ash for a long time.
As a result, after a while.
He found a thumb-sized "gold nugget" with a yellow surface.
"Hey, brothers, look what I found--"
Facing the camera, Lu Yu raised the corner of his mouth and murmured.
At this moment, the audience in front of the screen also saw this scene clearly!
"Fuck!"
"Is this copper?"
"6666666666666!"
"Awesome!"
"This... is too amazing, right?"
"Earth OL Supreme Player!"
"Have we entered the Bronze Age?!"
"Anchor, you are really invincible!"
"Oh my God, I am touched!"
...
Looking at the barrage, Lu Yu smiled without saying a word.
After a long time, he aimed the drone at himself again.
"How is it? It's hard to imagine, right?"
"Without any modern tools, we obtained precious copper. Ladies and gentlemen, this is the charm of primitive technology, and this is why human civilization can continue to this day... I succeeded, really succeeded..."
Glanced at the drone.
Lu Yu was delighted, with tears in his eyes.
All the way.
All these things are really too difficult for him.
Sixty days of extreme survival.
At this moment, a different dawn finally came.
"These coppers are of epoch-making significance for my survival challenge."
"Do you remember what I said on the first day of landing on the island?"