Chapter 38

To tell you the truth, this furnace and this crucible are a little miserable.

Because it needs to provide huge heat for the crucible, this kind of furnace has a big belly and a small head. Originally, the stone bear wanted to build this furnace, showing a round cone shape. But in fact, the stove is made of kaolin mixed with a certain proportion of clay and bone powder. At first glance, it looks like an enlarged version of niubaba. If there is one more point on it, it will be the Baba of the ox demon king

As for the so-called clay crucible, it looks more like a frying spoon after firing, and it is concave and convex everywhere, which is in line with the Chinese allegorical saying that pockmarks are not called pockmarks.

In the words of Shi Xiong's self-criticism, this is a typical case of high vision and low hand.

At the old wooden head's house, I had a bear with his wooden planer, but when I look back at the thing that he and Kuaima made, the wooden planing made by him can be called a work of art.

But fortunately, the furnace and the ladle crucible cooperate well. When the ladle crucible pier is behind the furnace mouth, it is a perfect fit.

I just don't know the effect.

After the stove was completely dried in the shade, the old wood also made the bellows. Needless to say, although the old carpenter encountered some difficulties at the beginning of making the bellows, the effect of the bellows made in the end was quite good, no worse than that of the bellows next to the stove used by stone bear when he was a child!

Of course, this bellows should be larger. After all, this bellows is the key to provide oxygen for the furnace. If it is smaller and the oxygen supply is not enough, the furnace temperature can not meet the requirements for melting pig iron.

A lot of coal has been transported by the clansmen. It is estimated that there are 8000 Jin without 10000 Jin. So much coal is enough, even for coking.

Early in the morning, all the people gathered to watch the guardian.

In recent days, the whole tribe is blessed. No wonder this big man can be chosen as the guardian by the kabulu sacrifice. This guy is so powerful.

He only needs to go out for a walk every day to make sure that he can hunt and kill a bison or a big red deer. Moreover, there is only one wound on the body of these prey, either in the heart or in the neck, which is absolutely killing.

The guardian kept his promise, which was praised by all the people in the tribe. Of course, when the guardian can provide meat for the tribe every day, all the work he asked for was done by the tribe.

A large amount of coal and iron ore were piled up in the open space in the middle of the tribe, next to some limestone and a wooden shed dedicated to kaolin.

Under this wooden shed, except for the kaolin, is the furnace built by the stone bear.

After igniting the coal with wood, even in late autumn, there was still a fire around the stove.

The strange looking clay pot was built on the stove with a lot of swarthy iron in it.

Speaking of these pieces of iron, many people are distressed. These pieces of iron are obtained after breaking those intact iron pots. I don't know why the guardian wants to do this. If you don't keep a good iron pot, you have to break it.

If these Indians knew the Chinese civilization, they would give this powerful Guardian a big hat of "tyranny".

But the pot has been smashed. Now it's too late to say anything. I can only watch these iron pieces start to smoke in the gradually red pot

To be honest, Shi Xiong has never done this kind of work. When he was a child, he had seen how to make iron in the local blast furnace in the countryside, but he had never seen how to melt the pig iron.

He can only do it by imagination.

Fortunately, although the clay crucible he made was very ugly, it was really resistant to burning. The five wooden men took turns to pull the bellows. The air from the outlet of the bellows entered the bottom of the furnace through the air duct. Immediately, the flame of the coal began to change from dark red to orange red, then to yellow white, and finally to dazzling white.

For the change of flame color corresponding to the temperature change, the stone bear heart is also more spectral.

As a cultural relic expert, he is very clear that before the invention of thermometer, the ancients created a method to judge the temperature by observing the temperature and fire color in the practice of smelting metal.

"Wood plane, watch this color, this dark red flame, the corresponding temperature is about six hundred..."

"Now the flame is crimson, and the temperature is about seven hundred degrees."

"Well, do you see the color of the flame? The temperature of this red orange flame is about nine hundred degrees. When the flame turns orange, it means that the temperature of the flame can reach 1100 degrees. "

"Well, now the temperature of the flame has reached white. At this time, the temperature of the flame is about thirteen hundred. It's almost the temperature I need. "

After being given a meal by the stone bear, he became interested in smelting. He took the initiative to find the stone bear and said that he wanted to learn how to smelt.

For this requirement of wood planer, stone bear is of course very much wanted. He just wants to cultivate special smelting talents in the tribe. No matter how powerful he is, no matter how much he knows, the specific work needs to be done by hand. Even if you tear yourself down completely, you can't get three or two nails. Therefore, it's very important to cultivate professional talents.

Since the wood planer is willing to make smelting, the stone bear really doesn't mind teaching him what he knows.

The performance of the wood planer also gratified Shi Xiong. When he first took part in the smelting, he raised the question of the relationship between the flame color and the temperature, which was enough to show that this guy was a man of great intention.

So the stone bear told him what he knew about the relationship between flame color and temperature.

Wooden planer is also a cultural man in the tribe. He took a piece of limestone and a stone slab and wrote down some symbols on it that stone bears could not understand

As the color of the flame reaches white, it means that the furnace temperature has reached more than 1300 ℃. And at this temperature, the crucible that looks like a bit of a bluff has withstood the test of high temperature. Even if the crucible is red, it is still not broken.

As for the pig iron pieces put into the crucible, they have begun to melt slowly at this time.

These iron pots exchanged by European colonists were actually gray cast iron. The melting point of this kind of gray cast iron is about 1320 degrees, so when the flame starts to turn white, these pieces of gray cast iron begin to melt

PS: the new week has begun again. Lao Mo is in urgent need of the support of the recommended tickets from readers!