There is no technical threshold for firing red bricks. Since it can be completed in just about 900 degrees, the requirements for fuel and kilns are not high, so the cost is much cheaper than that of blue bricks.

On paper, it seems that everything is simple.

However, when things are done, I find that there are many things that have not been considered. Many problems have emerged, and all kinds of troubles that should have occurred and should not have occurred are coming...

...After all, reality is not a game. As long as you select the frame and click the farmer to build it will be completed on time.

First of all, the brick embryo problem.

In ancient times, burning bricks required long-term drying and drying, while in modern burning bricks would be directly dried using air-drying kilns.

Xiao Heng directly uses modern craftsmanship here, but when he tries to air dry, he occasionally changes the embryo and cracks... After checking the Internet, he found that the bricks of modern craftsmanship will be mixed with coal gangue, broken bricks, etc., increasing the proportion of particles in the bricks. In addition, temperature, humidity, air supply speed, etc. all require fine adjustments... Just this is a lot of effort.

The second is the human problem.

It took a long time to let these honest and even dull people fully understand Xiao Heng's orders... Although Xiao Heng taught them over and over again, they would continue to repeat their mistakes.

Originally, Xiao Heng was planning to dig a pit about two meters wide and more than ten meters long on the ground. Both ends were slopes that could be lowered, and a depth of about two meters and five meters. The result was that they were so simple that they could dig out endless problems:

Some people kept digging pits on the ground like farming, and when they dig a little deeper, they changed places... When Xiao Heng was guiding others to dig brick kilns, the guy had silently dug several pits about one foot deep.

Some people seem to be unable to understand the concept of "slope". They dig down carefully. When Xiao Heng discovered it, he had already dug a half-man-deep trap...

However, under Xiao Heng's almost step-by-step guidance, the matter of digging a hole finally got on the right track, and a standard rectangular pit gradually took shape.

Compared with the various problems with adults, the youth group is much more worry-free.

These half-aged children are mainly responsible for picking large stones and making embryos in the loess. Xiao Heng also specially equipped two strong men to help them break the loess, carry water and mud.

First sprinkle a layer of fine sand on the ground, then put a simple rectangular wooden mold on it and apply yellow mud inside... Then carefully remove the mold, and a brick is ready.

As more and more brick embryos are added, the brick kiln is gradually taking shape.

The dome of the brick kiln is reinforced with bamboo tendons, and then the yellow mud with hay is applied inside and outside, leaving a moving window for fuel to be discharged and the internal firing is observed.

Finally, when the brick kiln was formed, the inside looked like a tunnel, while the outside looked like a bread-like earthblock.

After the brick kiln was built, Xiao Heng took everyone to make the brick embryo. It was not until the sun was about to set that Xiao Heng announced the end of work.

When he returned to bed, Xiao Heng was so tired that he didn't want to talk. He threw himself on the bed and fell asleep quickly... So, in fact, most insomnia can be cured by doing more physical work.

The next morning, Xiao Heng took the people to the place and then told them to continue making bricks. He ran to the carpenter's workshop next to the dock to pull back a strange car.

The lower half of it is no different from an ordinary ox cart, but there is a huge "propeller" installed on it, and something like a winch is connected behind it.

This is the human blower customized by Xiao Heng yesterday.

There are often rainy weather in Jiangnan, so it is unrealistic to rely on the power of the sun to allow bricks to dry naturally - it would be nice to wet the made bricks without rain yesterday.

However, when designing this brick kiln, Xiao Heng had already thought about it, and such a giant blower could be placed at its entrance.

First, he organized people to transport the brick embryos that were still wet all night to the kiln to place them one by one. Then Xiao Heng asked someone to light a fire at the entrance.

After finding a few strong men, I started pushing the winch, and then the huge fan blades rotated and poured the air into the kiln.

Soon, smoke came out from the exit of the brick kiln on the other side. The hot smoke caused the bricks inside to dry quickly under the action of the wind... When Xiao Heng felt that the bricks inside were almost OK, he did not have to wait for the fire to go out and directly poured firewood from the pre-stayed feeding port.

The flames quickly spread through the kiln to the inside... Gradually, the entire brick kiln was burning.

This takes a whole day to burn a kiln of bricks, and each time it can produce more than 10,000 bricks. According to the information found by Xiao Heng, 24 walls with double bricks can be built to build two and a half brick houses. According to the standard of at least two rooms per household, plus the bricks used for walls and floor paving, it takes about ten days in total.

After the brick kiln was running, Xiao Heng called the only literate boy over.

"What's your name?" Xiao Heng asked with his head down.

"Little Man Lu Chun." The boy lowered his head and whispered.

"Lu Chun... the name is good." Xiao Heng smiled, "How many years have you been studying?"

"I haven't read a book..." Lu Chun lowered his head and said, "I just often eavesdropped next to the school. Over time, I can recognize a few words."

"Oh..." Xiao Heng thought for a while and said, "Your name was also given by that gentleman, right?"

"...Yes." Lu Chun looked at Xiao Heng with a surprised look, as if shocked at why he knew this secret.

Actually, this is not difficult to guess.

First of all, let alone the ancients, even when they were just liberated, children from poor families were named Dogs, Leaves, Donkeys, and the likes of blacksmiths, it is already considered good to call Tie Hammers.

In ancient times, it was very expensive to hire a teacher. Even if you go to a private school, it was a family or a village that paid for it. And only large and powerful clans and villages could afford to hire a teacher.

Lu Chun has been eavesdropping at the private school and thinking that it is impossible not to let the gentleman know. Since he could eavesdrop there for a long time, it means that the gentleman has already agreed and probably got to know each other after a while.

Which of the people Lu Chun has come into contact with since childhood can give such a name? The simple and closed ancient society is far less complicated than modern times.

While talking, the two of them patrol each observation hole.

"Can you tell me what I'm doing?" Xiao Heng asked Lu Chun to follow him every time he finished reading it.

"See the temperature." Lu Chun guessed.

"Do you see any name?" Xiao Heng asked him.

"...It seems to be the color of fire?" Xiao Lu Chun said uncertainly.

"No," Xiao Heng smiled.

Under normal circumstances, the flame temperature ranges from low to high from deep red to white, with a span of two or three thousand degrees, while the flame at 900 degrees is orange-yellow.

Xiao Heng can only determine the furnace temperature by observing the color of the flame. Bimetallic thermometers are contact thermometers, with a maximum working temperature of only 500 degrees. In this era, it can measure higher temperatures is no less than Zen Star Technology.

"What else do you have to say about it?"

"This... the villain discovered that if the color of the fire became darker, the young master would teach people to add firewood." Xiao Lu Chun said.

"Very good, then I'll leave this to you next." Xiao Heng patted his shoulder. This child who has read books is indeed different from others, and the communication efficiency is much higher.

"Me!?" Little Lu Chun widened his eyes, "But I..."

"It's okay, I'll watch it aside, you do it." Xiao Heng encouraged, "By the way, you go find two more friends and teach them what you have learned."

"Yes." Lu Chun finally nodded, bowed and left to find someone.

Xiao Heng also walked away and directed the strong men and clay making blanks. In addition to ordinary brick embryos, Xiao Heng also specially asked them to make a lot of acres of acres that had stepped on straw.

Next, Xiao Heng was preparing to use this thing to make a crucible furnace.

In addition to smelting iron, the most important thing about the crucible furnace is that it can also smel glass.

In this era, scholars were born with the power to guide and interpret public opinion, and it would definitely take a lot of money to create a public opinion under the hands of these people.
Chapter completed!