Su Yang's request to smash the limestone was a completely correct choice, and in addition, according to his estimate, if the lime was burned in the open air, it was actually okay, and the temperature could reach more than eight hundred. Pen, fun, and www.biquge.info

At the beginning, clay pots were fired in the open air, but the time to calcine the lime was probably not a day or two, but a few days. And if there is an accident in the process, it will be a tragedy, such as the fire is extinguished, special weather, etc., so it will burn deadly.

Fortunately, he was witty and built the kiln in advance, although the kiln was a little smaller, and the volume was only one or two hundred cubic meters, which could not be compared with those twenty or thirty meters high vertical kilns. But conversely, a small kiln means less calcination time and less wood wasted.

That's right, because the temperature requirements of limestone are not too high, he doesn't plan to waste charcoal, just put it on the wood.

A layer of wood and a layer of limestone, stacked up, as if it was fired as before, in terms of time, it is expected to be done in ten hours, if it is fast, it can be done in four or five hours, and it may even be faster.

In modern times, all that is generally purchased is large lime, which can be as big as a rice cooker, which cannot be compared, this is the primitive period.

After a few more days, the first batch of clay pots dried in the shade was completed, and they were burned directly without waiting, waiting to repay the debt.

There are old people in the team who make pottery, and the big tribe is still a woman, and the kiln is a technical job, and everyone is willing to do it.

Soon, the smoke rose and smelled of grass and trees, and he asked to burn it for only three or four hours, and then seal the kiln and wait for it to cool naturally, which would definitely be inferior in quality, but you get what you pay for, and the food that was sent in exchange was only worth this price, and even later it would be burned in the open air for a few hours to finish the work.

This first kiln is only to test whether the kiln is qualified, and it cannot be delayed for too long.

The meal is open, the food is relatively poor, because the population is too large, there is basically no opportunity to eat meat, but everyone can get a share of the broth to drink, there is salt in the soup, and the rest of the tubers, roots, grass, etc. are sufficient, and they are not hungry.

In the early morning of the next day, with the slightest cold, the door of the kiln was opened, and the pottery inside was burned without any problems.

Seeing this, Su Yang breathed a sigh of relief and did not miss. The kiln he built in the Dapeng clan has not been tested, and if there is a problem, others will not repair it, but now it is good, the quality should be passable.

The clay pot was successfully fired, and the iron was struck while it was hot, and the limestone was immediately put on it, and he burned this in order to build a vertical furnace for smelting copper ore, and it was enough to burn it almost once. The remaining limestone will be used as a solvent for the copper ore.

Fortunately, his chemistry is okay, and some formulas can be deduced.

After the materials are put away, the fever is opened, and after the smoke comes out, it is called a smoke, which is very damaging to the environment. Basically, the vicinity will become gray, which will affect the growth of plants, and there is no way, you can't get a rotary kiln.

This problem persisted at the beginning of the 21st century, and his little environmental damage was nothing.

The smoke was white and green, mixed with smoke, and could be seen from a long distance. It is not possible to burn it like this, it will cause too much harm to the body of the clansmen, and living in such a place for a long time will reduce the life expectancy.

Besides, he himself is here, pondering for a while, and then there is a solution, that is, let the smoke rise as much as possible, fly higher, go with the wind, disperse, and the harm will be reduced. Nature has the ability to heal itself.

To put it simply, the chimney should be built higher, at least more than 20 meters, and with lime, it can be solved by mixing it into lime mortar.

Regardless of it now, he was a little nervous on this day, worried that he would miss it, and if he couldn't even burn the lime with the temperature requirement of 800, how could he get a copper mine.

By the way, it seems that something is missing, that seems to have forgotten to sacrifice to the gods, why is no one reminding it?

As a result, after he learned about the thoughts of the people from the side, he found that the reason was still with him, because he was now a half-witch, and everyone mistakenly thought that he had communicated with God.

It's not too late to make amends. Taking advantage of the time of firing, I made a good sacrifice, so I temporarily crammed the Buddha's feet at that time!

The next day, when he opened the kiln door, he found that it was really done, the limestone was successfully fired, this is still quicklime, he put his hand in the water and dipped some water on it, and suddenly there was a trace of smoke, this is it, lime.

After quicklime is added with water, it is hydrated lime, and when it is mixed with more than three times the sand, it is lime mortar, and the Great Wall is built in this way.

Sand is also easy to get, you can use sandstone to grind into sand, this is too troublesome. It was enough to go directly from the river to get it, and it was arranged earlier, and a lot of river sand was hoarded and carried a lot from the white spear.

Immediately he concocted it, yes, the color was right, he glued some stones together, and it solidified in half a day, and the quality was excellent.

"Ah, this stone burns out better than clay." Haru and the others were dumbfounded.

There are not many people watching, and there is a secret control, and even this is shocking enough, the stone is a stone, how can it be soft after burning, and it can turn to ashes, which is simply unheard of in the past.

Su Yang only said one word, Wu. Where it is unreasonable, it has its own God.

As soon as the lime came out, it was also an epoch-making product, which meant that in the future there could be stone houses, strong city walls, flat yards and dams, and insect protection for tree trunks. Some seeds, as well as food, are protected from moisture, as quicklime absorbs water.

Su Yang was very happy, he didn't care about resting, and after arranging the rest of the things, he started to build a copper furnace, which required more shapes, which was why he gave up clay and switched to lime mortar. Of course, the outside is also plastered with clay for insulation, and it is a thick layer.

It will also be plastered with refractory soil, which is much better than loess, and can withstand at least 1,700 degrees of high temperature without deformation.

Patching together irregular stones with lime mortar, I feel like I'm playing Tetris, which is particularly rewarding.

This copper furnace is repaired, a bit like a rectangle, only the corners are treated into a circle, the top is the furnace gas port, and there is a feeding port on the side, which is to prevent the charcoal inside from being enough, and can be fed twice.

In addition, it is very important to have air in the air vent to raise the temperature.

It's almost done, it feels simpler than the pottery kiln, but it's not, because of the complex shape, even Su Yang is sweating profusely, for fear that something will go wrong.

For example, at the bottom of the furnace, there is a water channel, grate, etc., when the copper ore melts, the copper juice will flow along this water channel to the outside, out of the copper furnace with the previously fired ceramic water pipe, and finally flow into a semi-circular reservoir.

Then the separation method is used to draw out the sediment, that is, the matte copper, but the tragedy is that the copper content produced by this method is not high. If you want to get pure red copper, you need to go through two more steps, and it will not be easier than this first copper smelting.

But this is the primitive period, why should he get pure copper, when the time comes, try the quality of ice copper, as long as it can be used.

What's more, the first time he smelted was natural pure copper, as long as it was melted and mixed with tin in proportion, it would be bronze, and he could immediately use modeling to make bronze to make Xuanyuan Sword or Chiyou Axe. (To be continued.) )