With a crisp "squeaking" sound, the best charcoal was fed into the stove. The air passed through the tunnel and continued to drill in along the ash leakage, and soon an orange-red fire ignited.
With a strange mood, Han Cheng personally poured two cans of crushed ore powder into the large vat. The two cans weighed about thirty kilograms.
This was the beginning of the great copper smelting business of the Qingque tribe.
The thermal conductivity of pottery is far worse than that of metal, but at this time Han Cheng does not have the ability to come up with steel boilers or other metal boilers that are more heat-resistant and have good thermal conductivity, so he can only use pottery cylinders slowly.
is coming.
"Add carbon into it and bring Feng Gulu over."
After waiting like this for a while, Han Cheng saw that the ore powder in the pottery jar was not melting much, and after thinking about it, he issued such an order.
"Chi~Chi~, Chi~Chi"
The 'hand drill' is pressed up and down, driving the fan blades to rotate back and forth, continuously injecting air into the stove through the ceramic tube.
Not long after, a scorching flame burst out in the stove. The fire was much stronger than before, and the charcoal in the middle was red and white.
These efforts were not in vain. This state lasted for about thirty minutes. Han Cheng found that the ore powder in the pottery jar seemed to have become lower.
As time went by, this feeling became more and more obvious, and eventually a thick red liquid metal appeared in front of my 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 that such a gratifying change would occur when copper ore was smelted for the first time.
Wu Ye leaned over and stretched his neck to look inside, his face also showing joy. Although he didn't see much, it didn't stop him from having fun with the Son of God at all.
The senior brothers who had built a shed around the stove also came over to watch like witches, and were amazed at the amazing transformation of stone into water.
They imagined that the tribe would get a lot of metal tools, and they felt very motivated. After standing here and watching for a while, they worked even harder to build the shed.
As time went by, more and more of the mineral powder melted, and finally it all turned into a thick, dark red liquid metal.
Looking at all this, Han Cheng, who was overjoyed, suddenly couldn't be happy anymore, because it was only then that he suddenly realized that a very important thing had been 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 a hole under the pottery jar and let the molten metal liquid flow out by itself, but it is obviously impossible to open it at this time.
Han Cheng scooped it out with a pottery spoon with a wooden handle. Looking at the metal beads dripping randomly, he gave up the idea of scooping them out with the pottery spoon.
After thinking about it, I asked people to stop the fire, stop adding charcoal to the stove, and stop turning the wind.
As the temperature inside the stove dropped, within a short time, the bright red molten metal in the vat began to turn into dark red, and eventually cooled down and turned solid again.
The wizard who came over to watch had a big smile on his face, and the senior brother and others were also grinning with joy.
Because there is a large piece of metal in the pottery jar, the metal looks a little black, similar to iron.
The tribe had been searching for iron bacteria for so long, and the iron they obtained was very limited. What was boiled in this vat seemed to be more than all the iron tools the tribe had combined. This made them unhappy.
?
They were happy, but Han Cheng was not happy because in his memory copper did not seem to have this color.
What appears in front of me looks like slag.
Han Cheng couldn't help sniffing. 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.
"Smash it."
After waiting for a while, until the temperature dropped even lower, Han Cheng asked someone to lift the vat off the stove.
He knocked it upside down on the ground and beat it for a while. When he saw that the mixture of copper and slag that had solidified into a lump inside showed no sign of falling, he asked someone to smash the vat.
There is no Sima Guang in the tribe, but he can smash the vat just as neatly.
These people, who were so stimulated by the metal, smashed this good vat to pieces after receiving Han Cheng's order.
Then whatever was solidified inside came out.
This is a cylinder shaped like the bottom of a vat. The bottom is made of purple metal, and the top is made of slag that tends to be black and feels weak to the touch.
The purple metal is pure copper extracted.
Han Cheng found stones and smashed them for a while, and also smashed some slag, but it was impossible to separate all the slag and copper in this way.
If you want to separate the two cleanly, you can only do it while they are liquid.
After looking at it with some regret for a while, Han Cheng no longer felt sad about the failed refining, because before refining, he had never thought about success.
And this time the copper smelting was not without success. Han Cheng discovered from inside that there must be a hole under the large refining vat, and discovered that the slag was lighter than copper and would float on top of the liquid copper after melting.
With these two discoveries, it will be easier to separate the slag and copper liquid.
"Son of God, here!"
The third discovery soon appeared, and it was still a shortcoming.
Hei Wa pointed to the stove and said to Han Cheng.
As the charcoal fire goes out, the stove gradually cools down.
Han Cheng followed Hei Wa's pointing and looked over, and saw that inside the stove, many bricks had been connected together. The surface was smooth, and it felt like touching ceramic tiles.
This is the result of the bricks being unable to withstand the temperature inside being too high, slowly melting and then cooling.
"Tear this stove down!"
Han Cheng's face suddenly turned pale as he touched the smooth bricks, because he thought of a terrible scene——
As the charcoal continues to burn, the bricks that support the stove gradually melt and become softer and softer, and then fall apart when they cannot bear the weight on them.
The large tank filled with half a tank of molten metal tilted and fell. The molten metal containing terrifyingly high temperature quickly rolled out and fell on people...
Such a horrific scene can make people shudder just thinking about it, especially for people who have just stood next to the stove and operated it for a long time.
Heiwa and others didn't know why Shenzi wanted to have this good stove ripped apart. In their opinion, such a situation was excellent, because not only did it look good, the entire stove also looked stronger.
Already.
Their doubts only existed for a short period of time. After listening to Han Cheng describe the horrific scene, they no longer thought this was a good phenomenon.
