I am a Primitive Man

In the crisp sound of 哗哗, the high-quality charcoal was sent into the stove, the air passed through the tunnel, and drilled continuously along the leaking ash, and soon an orange-red fire was ignited.

With a strange mood, Han Cheng personally poured two cans of ore powder that had been smashed into pieces into the big vat. The two cans weighed about thirty catties.

This is the beginning of the Qingque tribe's copper smelting industry.

The thermal conductivity of pottery is far worse than that of metal, but at this time, Han Cheng has no ability to produce steel boilers or other metal boilers that are more heat-resistant and have good thermal conductivity, so the pottery tanks can only be used slowly. Here comes.

Add carbon to it and bring the wind gulu over.

After waiting like this for a while, Han Cheng saw that the ore powder in the pottery jar didn't seem to be melting much, so he gave such an order after thinking about it.

Chi~chi~, chi~chi

The 'Hand Press Drill' is pressed up and down, driving the fan blades to rotate back and forth, and continuously injecting wind into the stove through the pottery tube.

Not long after, a scorching flame burst into the stove, and the fire was much stronger than before. The charcoal fire in the middle was red and whitish.

These efforts were not in vain. This state lasted for about 30 minutes, and Han Cheng found that the ore powder in the pot seemed to be lower.

As time passed, this feeling became more and more obvious, and finally a viscous red metal liquid appeared in front of his eyes, slowly swallowing the dusty ore powder.

Han Cheng, who was sweating from the high temperature, couldn't help showing a look of joy.

He did not expect such a gratifying change to occur in the first copper ore smelting.

Wu also leaned over and stretched his neck to look inside, his face also showed joy. Although he didn't see much, it didn't prevent him from being happy with Shenzi at all.

The senior brothers who built the shed around the stove also came over to watch like witches, and they were also amazed at the amazing transformation of stone into water.

Fantasizing that the tribe would get a lot of metal utensils, they only felt that they were full of energy. After standing here and watching for a while, they worked harder to build the shed.

As time passed, more and more mineral powders melted, and finally all became viscous, dark red molten metal.

Looking at all this, Han Cheng, who was overjoyed in his heart,

Suddenly he couldn't be happy, because at this time he suddenly realized that a very important matter was ignored by him.

That is how to get the boiled metal ore liquid out of the vat.

It stands to reason that it would be best to open an opening under the pottery jar so that the molten metal liquid can flow out along the opening, but it is obviously impossible to open it at this time.

Han Cheng scooped it up with a ceramic spoon with a wooden handle. Seeing the metal beads dripping randomly, he gave up on using the ceramic spoon to scoop them out.

After thinking about it, ask someone to stop the fire, don't add charcoal to the stove, and don't have to turn the wind.

As the temperature inside the stove dropped, within a short while, the bright red molten metal in the vat began to turn dark red, and finally cooled down and became solid again.

Wu, who came over to look at it, had a big smile on his face, and the elder brother and the others also bared their teeth and laughed.

Because there is a large piece of metal in the clay pot, the metal looks a little black, similar to iron.

The tribe has been looking for iron bacteria for so long, and the iron they get is very limited. The pot boiled out seems to be more than all the iron utensils in the tribe combined, which makes them unhappy ?

They were happy, but Han Cheng couldn't be happy, because in his memory, copper didn't seem to have this color.

The things that appeared in front of my eyes looked like slag no matter how I looked at them.

Han Cheng couldn't help sniffling. He realized that he had made another serious mistake, that is, he did not separate the molten copper from the slag.

The two are inseparable, so it is a bit difficult to get pure copper out.

Smash it.

After waiting for a while, when the temperature dropped even lower, Han Cheng asked someone to lift the vat off the stove.

He knocked it upside down on the ground for a while, and seeing that the mixture of copper and slag that had solidified into one piece did not fall down, he made a noise and asked someone to smash the big tank.

There is no Sima Guang in the tribe, but the smashing of the tank is just as clean and neat.

These people who were stimulated by the metal like beating chicken blood smashed the good tank to pieces after receiving Han Cheng's order.

Then what was frozen inside came out.

This is a cylinder in the shape of the bottom of a tank, the bottom is purple metal, and the top is slag that tends to be black and feels relatively empty to the touch.

The purple metal is extracted pure copper.

Han Cheng found a stone and smashed it for a while, and also dropped some slag, but it was impossible to separate the slag from the copper in this way.

If you want to separate the two, you can only do it while they are liquid.

After looking at it with regret for a while, Han Cheng didn't want to do anything more to feel sad about the failed refinement, because he didn't expect to succeed once before the refinement.

Moreover, the copper smelting this time was not in vain. Han Cheng discovered from the inside that there was a hole in the bottom of the smelting vat, and found that the slag was lighter than copper and would float on the copper liquid after melting.

With these two discoveries, how to separate the slag and copper liquid is easier to do.

Son of God, here!

A third discovery soon emerged as well, still a deficiency.

Hei Wa pointed to the stove and said to Han Cheng.

As the charcoal fire was extinguished, the stove gradually cooled down.

Following Heiwa's guidance, Han Cheng looked over, and saw that many bricks inside the stove had been connected together, and the surface was smooth, as if he had touched tiles.

This is the effect produced after the temperature inside is too high, the bricks cannot withstand it, slowly melt and then cool down.

Give up this stove!

Han Cheng, who was touching the smooth brick, suddenly turned pale, because he thought of a terrible scene——

As the charcoal continued to burn, the bricks of the stove gradually melted and became softer, and then they could not bear the weight on them and fell apart.

The large cylinder filled with half a tank of molten metal tilted and fell, and the molten metal containing the terrifying high temperature quickly rolled out and landed on the person...

Imagining such a terrifying scene makes people shudder, especially for those who have just stood by the stove for a long time.

Heiwa and the others don't know why Shenzi asked someone to scrape this good stove. In their opinion, it is very good that such a situation occurs, because not only does it look good, but the whole stove also looks stronger up.

Their doubts only existed for a short period of time. After listening to Han Cheng's description of the horrible scene, they no longer felt that it was such a good phenomenon.