Chapter 567 Gold and silver are not as good as dung
Of course, the freshly made clay embryo cannot be burned directly. After it is done, it is left there to wait for drying.
During this process, Han Cheng and Hei Wa worked together to build the stove again with yellow clay and clay.
The scale is about the same as before.
After making the pile, let it dry for a day, then light a fire inside to bake it, so it dries quickly.
The special pottery vat used to smelt copper was also placed next to the fire to bake, which could speed up its process, otherwise it would take too long to dry naturally.
Eight days later, the two newly manufactured items were finally ready.
After placing the pottery jar on the stove and connecting the two, the Qingque tribe's copper smelting business began again.
Han Cheng stepped on the stone steps and stopped when his waist was level with the mouth of the stove. He tilted the jar in his arms and poured the ore powder inside slowly into the jar.
This time I put more, I put six cans in it before I stopped.
There is no need to worry that the ore powder will flow out from the opening left below, because it has been blocked from the inside with a ceramic plate before doing this.
After the ore powder was poured in, the flame began to burn, the wind roared, and the hot temperature gathered here, through the bottom of the pottery jar, transferring the heat to the inside, affecting the ore powder.
This process was a bit long, and after a long time, the ore powder inside finally began to melt slowly.
As for all melting, that will happen a long time later.
Han Cheng climbed up the steps again, tilted his head back, and squinted at the high-temperature liquid inside.
The air with very high temperature is steaming upwards, making it a bit unbearable.
"Everyone get out of the way!"
After Han Cheng looked at it, he turned around and shouted to the people next to him.
Hei Wa, who was lighting the fire, and Wu and others who were watching around him all moved away from the place after hearing this.
He stared at the stove and Han Cheng with nervousness and anticipation, waiting for Han Cheng's movements.
Han Cheng, who was wearing a bare leather apron and bare leather sleeves and gloves on his hands and arms, turned around and saw that everyone had left, so he held the ceramic plate that was much higher than the inner wall of the pottery jar with both hands.
Pull it up and put it to the side. Immediately, slag with very high temperature slowly flows out of the hole.
The extremely hot slag fell to the ground, making a "chichi" sound and stirring up a cloud of white smoke.
Han Cheng did not ask anyone to collect the slag in a clay pot.
After waiting, he planned to lead people to build a relatively sloping slope here. When the slag accumulated more and more, he would let them roll down the slope to the bottom of the post 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 any hesitation. It can be said that he really treated gold and silver as dirt.
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 achieve such freedom and ease was that he did not have the ability to separate the slag again and get out the gold and silver inside.
Secondly, the value of gold and silver is given by people. At this time, gold and silver cannot serve as equivalents, nor can they become the eyes of the devil.
If you exchange a large piece of pure gold for food with another tribe, it will most likely happen that the person who owns the food will take the gold that cannot be eaten or used, examine it, and then angrily throw it back at you.
The slag does not flow very smoothly, which is related to the fact that there are more impurities in it and it is relatively sticky.
It seems that this boiler needs further modification.
The opening for excretion should be changed from a flat opening to an oblique opening, so that the drainage will become much smoother.
After a while of hard work, the slag was finally discharged.
Han Cheng asked his senior brother to get a prepared clay pot and put it under the opening for the pottery juice to come out. Then he pulled out another pottery plate that blocked the opening, and the molten metal with extremely high temperature began to slowly flow out and fell into the
In the clay pot below...
The scorching temperature gradually dropped, and most of the copper liquid in the clay pot cooled and solidified.
The clay pot was smashed, revealing half a pot-shaped purple copper ingot.
Looking at the large piece of copper ingot, Han Cheng, Wu, Senior Brother and other people who were worried about this matter couldn't help but smile.
Wu, a devout old man, based on the principle of giving all glory to God, immediately began to praise the God who had never paid attention to him.
Han Cheng looked quite helpless. These were all made by himself and others with little effort. What does they have to do with the gods?
This was what he thought in his heart, but Han Cheng did not say it out loud. After all, he was still wearing the gorgeous cloak of the Son of God, so he was the biggest beneficiary.
After looking at the copper ingots, Han Cheng used a stick to poke the lumps of slag.
After turning it over with a stick, I discovered that there was still a lot of solidified copper at the bottom of the slag.
No wonder the copper ingots refined this time are so good. It turns out that a lot of liquid copper was released.
It seems that I put a little too much ore powder this time, so I need to put less mineral powder next time.
With this in mind, Han Cheng immediately called for the stone and put the copper ingots refined this time on the scale.
After weighing, a record was made of how much ore powder was put in and the number of copper ingots obtained.
This way you will have a reference next time you do it.
It's impossible not to waste a little bit of molten copper, but it can be less than what was wasted this time.
Of course, the quality of the ore is different, and the proportion of copper content and slag will also be different, so it cannot be generalized.
These detailed things need to be practiced again and again, accumulating original data again and again, and then summarizing.
Get the theory from practice, and then use practice to verify the theory to improve it. When the two confirm each other, you can always slowly find a similar standard.
Touching this piece of copper ingot, Brother Wu and others started talking about it. Wu said that it needed to be dedicated to the God first to thank the God for blessing the tribe.
The senior brother said that he wanted to make a copper shield so that he could become more brave when facing prey and enemies. Shitou said that it would be better to make some copper pens so that they could better protect themselves on the pottery board.
Lettering.
Han Cheng listened and smiled without saying a word. On the one hand, he was happy for the state of everyone and the fact that there was copper in the tribe.
On the other hand, it is because many of the wishes that everyone has said cannot be realized until we get tin or lead and get out the bronze...
In the courtyard, Bai Xuemei, who was carrying a bamboo basket and feeding mulberry leaves to the silkworms in the dustpan, suddenly frowned and pressed her lower abdomen with one hand, a look of pain on her face...
