I am a primitive

At the beginning, the colleague thought his wife was greedy for pork, so he hurried to buy it home. After cooking it carefully, he found that his wife only ate two small pieces and stopped using her chopsticks.

After repeated questioning, I realized that what I was hungry for was not pork, but pig food...

After picking a bamboo basket full of mulberry leaves, all the mulberry fruits on one tree disappeared, and only Bai Xuemei was still looking at the other trees eagerly, as if she didn't want to leave.

What Han Cheng couldn't stand was her look, so he had to pick a lot more, wrapped it in a big tree leaf, and handed it to Bai Xuemei.

Han Cheng walked in front with a bamboo basket, and Bai Xuemei followed behind with mulberries, so beautiful that her nose was bubbling.

Han Cheng, who swallowed his saliva for a long time, felt that it would be difficult to eat mature mulberries in the tribe this year.

After returning to the tribe to help Bai Xuemei feed the silkworms and arrange the 'housework', Han Cheng then found Hei Wa to think about the new copper smelting stove with him.

The "cylinder" for copper smelting must be specially made, and a hole must be left at the bottom of the cylinder to allow the molten metal to flow out of the cylinder.

For such an opening, of course, the lower the opening, the better, because the lower the opening, the cleaner the copper juice inside will flow.

According to this standard, it is most suitable to open on the bottom of the tank.

But of course it won't work. After thinking about it, I opened the opening on the wall of the tank, as close to the bottom of the tank as possible.

As for the matter of slag, after thinking about it, I came up with an idea, which is to use the characteristic that slag is not as heavy as molten copper.

Of course, it is not to use a spoon to scoop it out a little bit. This is too slow, too dangerous, and it may not be cleaned.

The solution Han Cheng thought of was actually very simple, that is to make an opening on the other side of the pottery vat, the opening should be higher than this, so that the slag floating on the upper layer can be drained out. All that's left is the molten copper.

And with these two outlets, the large vat for refining copper liquid can be reused, instead of smashing one at a time like yesterday.

As for the stove for the fire, it is also easy to solve, just replace the bricks with yellow mud and clay.

These two things are extremely fire-resistant and will not be burned like bricks.

After some discussion and sketching on the ground, the two finally settled on the shape of the special pottery jar.

Then the rest is Hei Wa's performance alone.

After several years of specializing in one thing, Heiwa's skills became more and more proficient, and Han Cheng, the person who brought Tao into the tribe, had already been left far behind.

Watching Heiwa make pottery now is simply a visual enjoyment.

The reconciled mud seemed to have life in his hands, very obedient, and with his movements, it quickly became what he expected.

The whole process can be described as smooth and flowing.

Before it was dark, a special clay jar with a height of more than 1.5 meters and a diameter of more than [-] centimeters at the bottom appeared in front of Han Cheng.

This pottery vat is also different from ordinary pottery vats. The difference is that the upper middle part of the pottery vat is thinner than both ends, and it looks a bit like a vase for flower arrangement.

The reason why there is such a unique shape is that when designing, Han Cheng suddenly remembered the brick-built chimneys in the steel factory that he had seen from afar, and white smoke rose from time to time. s things.

Although I don't know what it is used for for the time being, but since later generations built it like this, it obviously makes sense, so Han Chengcheng used it honestly.

-------------Chapter Dividing Line---------------

Of course, the freshly made mud embryos cannot be directly burned. After they are finished, they are placed there and wait to dry in the sun.

During this process, Han Cheng and Hei Wa rebuilt the stove with yellow mud and clay.

About the same size as before.

After it is built, let it dry for a day, and then light it on the fire to bake it, so that it dries quickly.

The special clay pot used for smelting copper was also placed beside the fire to speed up the process, otherwise it would take too long to dry naturally.

Eight days later, two newly manufactured items were finally ready.

Put the pottery jar on the stove, and after the two are connected, the copper smelting business of the Qingque tribe begins again.

Han Cheng stepped on the steps built with stones, stopped when his waist was level with the stove mouth, tilted the jar he was holding in his arms, and slowly poured the ore powder inside into the jar.

This time I put a lot, and I put six cans in it in a row before I stopped.

Don't worry about the ore powder flowing out of the opening left below, because it has been blocked from the inside with a ceramic plate long before doing this.

After the ore powder was poured in, the flames began to burn, and the wind whirled. The scorching heat gathered here, passed through the bottom of the ceramic vat, and transferred the heat inside, affecting the ore powder.

This process was a bit long, and after a long time, the ore powder inside finally slowly began to melt.

As for all melting, that is a long time later.

Han Cheng boarded the steps again, tilted his head back, and squinted at the high-temperature liquid inside.

With a very high temperature of air, it is steaming upwards, which is a bit unbearable.

"Get out of the way!"

After looking at it, Han Cheng turned his head and shouted to the people around him.

Hei Wa, who was burning the fire, and Wu, who was watching around there, all left here one after another after hearing the words.

He stared at the stove and Han Cheng closely with nervousness and anticipation, waiting for Han Cheng's action.

Wearing a bare 'leather apron' on his body, and wearing bare leather cuffs and gloves on his hands and arms, Han Cheng turned his head and saw that everyone had left, so he held the ceramic plate that was a lot higher than the inner wall of the pot with both hands. Pull it up, and then lean it aside, and immediately there will be slag with very high temperature flowing out of the hole slowly.

The extremely hot slag fell on the ground, making a "chichi" sound, and aroused a cloud of white smoke.

Han Cheng didn't let people pick up the slag in clay pots.

After waiting, he planned to lead people to build a relatively sloping slope here, and when the slag accumulated more and more, he would let them roll down the slope to the bottom of the gang bag.

Copper ore contains not only copper, but also other metals, such as gold and silver, which generally contain some.

However, Han Cheng still threw away the slag without the slightest hesitation. It can be said that he really treated gold and silver like dung.

This sentence seems inaccurate. In Han Cheng's eyes, these slags containing gold and silver are not as important as dung.

The reason why he was able to do so freely was that he was incapable of separating the slag again to get out the gold and silver inside.

The second is that the value of gold and silver is given to it by people. At this time, gold and silver cannot serve as equivalents, nor can they become the eyes of the devil.

You take a large piece of pure gold to exchange food with other tribes, and the person who owns the food will take the inedible and unusable gold for inspection, and then angrily throw it back to you. It will happen in all likelihood.

The slag does not flow very smoothly, which is related to the fact that there are many impurities in it and it is relatively viscous.

It appears that the boiler needs further modification.

The opening for excreting things should be changed from a flat opening to an oblique opening, so that the drainage will become much smoother.