Chapter 565: Learn while fighting

In the crisp sound of "pushing", the finest charcoal was sent into the stove, and the air passed through the tunnel and continued to drill into it along the place where the ash leaked, and soon an orange flame was ignited.
With a strange mood, Han Cheng personally poured two jars of ore powder that had been smashed into pieces into the big tank. The two jars weighed about 30 kilograms.
The Qingque tribe's great copper smelting business began.
The thermal conductivity of pottery is far worse than that of metal, but at this time, Han Cheng has no ability to get a steel boiler or other metal boilers that are more heat-resistant and have good thermal conductivity. Therefore, the pottery tank can only be used slowly. Is coming.
"Add carbon to it to get the wind gurg over."
After waiting for a while, Han Cheng saw that the ore powder in the pot didn't melt too much, and gave such an order after thinking about it.
"哧~哧~, 哧~哧"
The ‘hand pressure drill’ is pressed up and down, driving the fan blades to rotate back and forth, injecting wind into the stove through the ceramic pipe.
It didn't take long for a hot flame to rise in the stove. The fire was much larger than before. The charcoal in the middle was red and white.
These efforts were not in vain. This state lasted for about 30 minutes. Han Cheng found that the ore powder in the pottery tank seemed to be lower.
Over time, this feeling became more and more obvious, and finally a viscous red metal liquid appeared in front of the eyes and slowly swallowed the dusty ore powder.
Han Cheng, who was sweating from the heat, couldn't help showing a look of joy.
He did not expect such a gratifying change the first time he smelted copper ore.
Wu Ye also leaned over and craned his neck to look inside, his face also showing joy. Although he didn't see much, it didn't prevent him from having fun with the son.
The elder brothers who built the shed around the stove all came together to watch like a witch, and were amazed at the amazing change that the stone turned into water.
They imagined that they would get a lot of metal utensils in the tribe. They only felt that they were full of energy. After standing here for a while, they built the shed even harder.
As time passed, the mineral powder melted more and more, and finally all became viscous, dark red molten metal.
Looking at all of this, Han Cheng, who was delighted in his heart, suddenly became unhappy, because at this time 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 big tank.
It stands to reason that it is best to open a hole under the pottery jar and let the molten metal flow out by itself, but this is obviously not possible.
Han Cheng scooped it with a ceramic spoon with a wooden handle, and looked at the metal beads dripping randomly, and gave up his plan to scoop them out with a ceramic spoon.
After thinking about it, let people stop the fire, don't add charcoal to the stove, and the wind does not need to be turned.
As the temperature in the stove decreases, within a short while, the bright red molten metal in the big tank begins to turn dark red, and finally cools down and becomes solid again.
The witch who came over to see had a smile on his face, and the big brother and others were also grinning.
Because there is a large piece of metal in the pottery jar, the metal looks a little dark, similar to iron.
The tribe has been searching for iron bacteria for so long, and the iron obtained is very limited. The boiled pot looks more than all the iron tools in the tribe combined. This 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 yet.
These things that appeared before my eyes looked like slag.
Han Cheng couldn't help but sniffed. He found that he had made another serious mistake, that is, not separating the copper liquid from the slag.
The two are inseparable, and 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 people to lift the big vat from the stove.
He knocked on the ground for a while, and saw that the solidified copper and mixture showed no signs of falling, and he made a noise to smash the big tank.
There is no Sima Guang in the tribe, but the tank is just as clean and tidy.
These people who were stimulated by the metal as if they were beating chicken blood, after receiving Han Cheng's order, they smashed the good tank in two or two.
Then the things solidified inside came out.
This is a cylinder shaped like a cylinder, with purple metal underneath, and black on the top, which feels more imaginary to the touch.
The purple metal is pure copper refined.
Han Cheng found a rock and smashed it for a while, but he also smashed some of the slag, but it was impossible to separate the from the copper in this way.
To separate the two cleanly, you can only do it while they are liquid.
After watching with some regrets for a while, Han Cheng stopped doing more sentimental for the failed refining, because before refining, he didn't think of being able to succeed in one go.
Moreover, the copper smelting this time was not without results. Han Cheng discovered from the inside that holes should be left under the refining tank, and discovered that the is lighter than copper and will float on the copper liquid after melting.
With these two discoveries, how to separate the and copper liquid is easier to do.
"God, here!"
The third discovery appeared soon, and it is still a shortcoming.
Heiwa pointed to the stove and said to Han Cheng.
As the charcoal fire extinguished, the stove gradually cooled down.
Han Cheng looked over with Heiwa's guidance, and saw that inside the stove, many bricks were already connected together, the surface was smooth, and it felt as if he had touched the tiles.
This is the effect that the temperature inside is too high~EbookFREE.me~ the brick can't stand it, it melts and cools slowly.
"Pick this stove!"
Han Cheng, who touched the smooth bricks, suddenly turned pale, because he thought of a terrible scene from this
With the burning of the coals, the bricks of the stove gradually melted and became softer, and then they could not bear the weight on them and fell apart.
The big tank with half-cylinder of molten metal slant and fell, and the molten metal containing terrifying high temperature quickly rolled out and fell on people...
Such a horrible scene makes people shiver to imagine, especially for someone who has just been standing by the stove and operating for a long time.
Heiwa and the others don’t know why the son of God wants to let people pick up this good stove. In their opinion, this situation is excellent, 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 this was a good phenomenon.