After igniting the kiln fire, the heat wave in front of the kiln is rolling all of a sudden, not only the kiln mouth is hot enough, in fact, the temperature near the entire dragon kiln is much higher, after all, the kiln at this time has not adopted the kiln design of the later generations, and there are no good refractory materials and insulation materials, so the heat radiation in the kiln keeps spreading to the surroundings of the dragon kiln, making the surrounding temperature rise several degrees. Pen × fun × Pavilion www. ｂｉｑｕｇｅ。 ｉｎｆｏ

It didn't take long for Li Kang, Li Xiang, and several stewards to sweat, as well as the potters, although Li Kang's back was wet with sweat, but his eyes still looked at the fire without blinking, this is the last kiln, if it is not successful, then he will probably have to say goodbye here, and he will have to say goodbye to the old business that has been working for more than ten years.

In fact, not only Li Kang, but also several stewards and potters were also worried, and the failure of this firing was also related to their future. So everyone didn't leave, and they all stared at the kiln without blinking.

Li Kang suddenly turned his head to Li Xiang beside him and said, "Xiang'er, do you think our kiln can succeed?" ”

Li Xiang smiled and nodded, "Father, this time will definitely be successful!" When I saw the inside of the kiln just now, the fire dragon seemed to be laughing! Maybe the ancestors have appeared, father, you can rest assured! ”

Li Kang sighed and said, "I hope so!" If this kiln also burns out, it will really be providential! ”

"Add firewood!" Steward Hu's eyes have been staring at the mouth of the kiln, and now the kiln fire has been burning, but to reach a firing temperature of more than 1,000 degrees, it is still not easy to achieve in this kiln that uses firewood and is relatively backward compared to later generations, so in the whole firing process, it is necessary to continuously add firewood.

There are several firewood ports in the dragon kiln, so the potters need to run back and forth from the dragon head to the dragon's tail to add firewood to the firewood mouth.

Several potters began to add firewood to the kiln, and the flame in the kiln chamber was temporarily reduced, but when the newly added firewood was burned, the flame and temperature would increase a lot.

Li Kang's eyelids twitched, Li Xiang stood beside his father, looked at his father's nervous appearance, and said to his father: "Father, you don't have to be too nervous, let's relax!" Try to take a few deep breaths and sleep at night without feeling a sore back. ”

Li Kang said, taking a deep breath, to be honest, he was indeed too nervous, who could not be nervous? This is the last chance! Although the amount of billets fired in this kiln reached ten times the amount needed in the palace, no one was confident. After all, under normal circumstances, the yield rate is only more than ten percent, and the first two times are only a few tenths of a percent.

The flames in the kiln were beating with Li Kang's breathing, as if there was some kind of connection between them, and even Li Kang himself felt that this time he would definitely succeed.

As for the steward and potter next to him, they felt that it was amazing, and they were all wondering, could it be that the previous sacrificial kiln really worked? Did Master Zu really manifest himself?

After another hour, the steward said loudly: "Stop adding firewood, you, give me the fire tongs!" ”

Steward Hu picked up the fire clip handed by the potter next to him, this kind of fire clip is specially made, more than a zhang long, he took the fire clip and flicked it in the chamber a few times, several piles of burning firewood gently dispersed, and the flame in the kiln became a little brighter.

The other two stewards and two potters also leaned over to take a look, and then everyone looked at each other and nodded, which means that this fire mouth is not bad!

It was the first time Li Xiang had seen this ancient method of firing porcelain. He studied inorganic non-metallic materials in college, modern ceramic firing, completely industrialized, the fuel is generally pulverized coal or natural gas, the injection method, and there is an automatic kiln temperature control device.

And this ancient dragon kiln almost depends on the personal experience of the potter.

At this time, the 3D printer in Li Xiang's body appeared again, this time it showed a string of dragon kiln data: this kind of dragon kiln, usually built according to the slope of a hill or a mound of earth, mostly formed a 7-23° angle with the horizon. The front end is low, which is the kiln head and fire chamber; The rear end is high and is the kiln tail. Because the kiln body is like a dragon, it is called "dragon kiln". Its "back or both sides along the length of the kiln every l meters or a pair of firewood holes", roasting "put the fuel into the kiln between the body stacks of the fire channel burning", when the place reaches a predetermined temperature, the firewood position is moved forward a row, so from bottom to top row by row roasting, forming a moving flame.

The head of the dragon kiln is equipped with a preheating chamber, and there is no chimney or only a chimney at the end of the kiln, which is a flat flame kiln; When loading and firing, the products are placed on a fixed kiln bed, and the products are cooked section by section from bottom to top by relying on the flow of flames. "The hot gas generated by the front combustion flows along the slope of the kiln to the rear, and the products behind are preheated and discharged through the kiln tail. After the products in the first section are burned, the flame moves back, and the products in the next section enter the firing stage, and the products in front begin to cool, while the products behind the firing section are still in the preheating stage."

This kind of dragon kiln has many advantages: first, the production cycle is short; Second, the temperature in the kiln is relatively uniform; Third, it is easy to control the reduction atmosphere and the temperature rise and fall rate; Fourth, the structure of the kiln is simple and the cost is very low. The disadvantage is that the labor intensity of kiln loading and kiln opening is high; The atmosphere and temperature of some parts of the kiln fluctuate greatly; Because the bottom of the kiln is slope-shaped, it brings a lot of inconvenience to the firing.

However, for the royal official kiln, everything is to fire the most exquisite porcelain, so whether it is high cost or inconvenient to pretend to burn, it is not for Li Kang to consider, he only needs to consider how to fire more exquisite porcelain to make the difference.

It burned for about a whole day, until it was almost dark, Li Kang and several stewards summed it up and felt that it was almost there.

Li Kang ordered: "Okay, now we can seal the fire mouth, and wait for the kiln to come out tomorrow, I believe that Master Zu will bless, we will definitely be able to succeed this time!" ”

Li Xiang followed his father in the kiln for a day, and even had lunch at noon, he was sent to the kiln.

No one knows that Li Xiang is actually already in his body, using a super 3D printer to print out hundreds of celadon tea cups, and those celadon tea cups printed with super 3D printers are even more exquisite and of better quality than the celadon tea cups fired by the official kiln! This is the high technology more than 1,000 years later, the super 3D printer can even print out airplanes, tanks, high-rise buildings, not to mention small porcelain!

Of course, the time has not yet come! What Li Xiang needs is an opportunity to steal the day and replace some of the celadon tea cups burned in the kiln, that is, hundreds of pieces. There are many in the kiln, in fact, this time it will also fail to fire, and when the kiln is opened tomorrow, no one will find out that the hundreds of celadon tea cups that have been successfully fired will be printed by super 3D printers more than 1,000 years later.

Li Xiang is confident, with a super 3D printer, what else can't be done?