Release that Witch Chapter 12: Fired
Roland stands in the backyard of the firing room and waits for the first batch of cement to come out.
This brick house was designed for cement production. It is about 15 meters long and 4 meters wide. There is a door on the front and back, the difference is that the front door is as wide as possible for people to carry materials. The back door is only one person wide, allowing Anna to sneak into the burning room.
For this reason, he also built a wall around the house's half-waist to surround the second half of the firing room. The import and export have Knight to guard --. They are all Carter's subordinates. There is no doubt about loyalty.
The production process of cement is very simple. After crushing limestone into powder, it is mixed with clay and iron powder, and the mature material is calcined by dry or wet method, and then ground together with gypsum and used. The raw materials are very common, and it is difficult to make large quantities of iron powder. The key lies in the calcination temperature of the clinker.
I do n’t remember the specific temperature Roland required when firing the cement. Even if he remembered, he could n’t measure and control the temperature. --, whether it is an infrared thermometer or a thermocouple temperature gun, is countless times more complicated than cement. He only knows that the temperature is almost similar to that of iron Melting Point, and the calcination process is also a difficult problem in the production of cement.
In an era of underdeveloped smelting technology, maintaining blast furnace temperature has always been a problem that bothers everyone. The heat loss of an ordinary open-hearth furnace is extremely large, and it is difficult to maintain the furnace temperature above 1200 degrees. The reverberatory furnace needed a high temperature resistant liner, and he couldn't think of how to make refractory bricks for a while. Traditional ironmaking blast furnaces are even more difficult. The temperature may reach the standard, but the narrow and long furnace cavity alone is used to calcinate the cement. I am afraid that when Months of Demons has passed, it will not burn a sufficient amount.
Therefore, the heating room designed by Roland does not have any heating measures at all. He relies on Anna.
The artificially broken small particles of limestone are mixed with clay, mixed with water and stirred to form a slurry, and evenly spread in the firing room. Then Knight locked the door and cleared handyman. Anna enters through the back door, and let the flame bake the slurry on the ground until the iron rods placed in the room are melted together.
Roland is a little restless, this is his first step in Border Town's. If cement cannot be produced, the plan to build a city wall in three months is just empty talk. There is no wall to block, I'm afraid no one wants to stay in this ghost place. Whether it is real history or fictional literature, a stable base area is essential for good farming.
"His Royal Highness, can such things you say really stick the stones together?" asked Carter Lannis, who was standing beside Fourth Prince. Although the prince told him that this is the latest research result of Greycastle alchemical workshop, he is still doubtful. After all, those people have not made any really reliable alchemy products.
"Who knows? Anyway, they say that," Roland said in a hand.
This world alchemy and astrology are also known as sage art, and they are very popular in mainland countries. The royal family generally trains its own alchemy surgeon and astrologer for secret drug refining and predicting destiny. For ordinary people, these studies are so high that they create a psychology of blind faith. With this in mind, Roland naturally leads the problem of the origin of the cement formula to the alchemical workshop head. As for Chief Knight, believe it or not, it doesn't matter at all.
The flames from the window gradually extinguished, and it looked like it was burned.
Roland shouted and stood up, drove Carter out of the yard, and stood alone in front of the back door of the brick house and waited.
The iron door squeaked and was pushed away, Anna **** walked out. Roland put her robe on her for the first time, and brought her a glass of water, "how?"
witch's face is dusty. Although the wet-process cement has low dust, the hot air during calcination will still bring dust. For her who can't wear a mask, it's obviously not too comfortable to spend dozens of minutes inside. She coughed twice and nodded. "The mud has turned into dust."
Roland can't wait for the temperature in the firing room to drop to a low enough temperature. He wrapped his wet towel around his head, grabbed the shovel and drilled it into the back door.
The hot air surrounded him for a moment. He felt breathing difficult for a while, and the skin on his hands was burned and hurt. Fortunately, it doesn't take much time to shovel a handful of ash, otherwise staying in this environment for a few minutes will only cause high temperature shock.
"This is what you want?" Anna stretched his head and asked after putting on the witch suit.
"It looks alike," Roland flattened the powder and felt its residual temperature with his fingers. "I have to try it before I know if it works."
"What is it for?"
"There are too many places to build houses, bridges, and roads. If it succeeds, people's homes will not be afraid of the wind and cold, and heavy rain and snow will not be destroyed." He patted with his other hand I patted the girl's head, "It was made by you."
Anna looks down. I don't know if it was an illusion. He felt that the girl's breathing became faster.
In theory, the fired clinker is ground with gypsum to adjust its hardening time. However, there is no need to consider so much at this time. After taking a break, Roland shoves out two more, and then calls Carter standing outside the hospital, letting him prepare cement mortar according to the proportion of three parts of ash and one part of river sand.
Chief Knight also doesn't mind doing some rough work at all. To him, doing this kind of thing is much better than fighting and fighting with her Highness or collaborating with Miss noble in Greycastle.
Because there is no joining iron powder in the raw material, the color of the cement slurry is light and it is off-white. Roland dumped them on a stone brick and buckled the other one up. The setting time of the cement is about four hours. Considering the instability of the prototype, he intends to wait until tomorrow to see the results.
In the early morning of the next day, Roland hurried to the backyard of the firing room with Carter and Anna. Pushing the door open, he noticed that the cement exterior was solidified and tightly joined to the two stone bricks. The consolidated surface looked uneven, and frost appeared in some places.
Roland squatted down, scraped away the **** frost produced by the alkalizing reaction, and pressed the hardened cement with his fingers. The touch made him happy. The surface of the -- cement was firm and hard, which was completely different from the tactile feel after tamping the soil. The nails were pressed hard, and there was no trace left on them.
After Carter got Fourth Prince's indication, he first tried to lift the stone brick, but failed. He kicked his feet fiercely from the side until the joint between the cement and the ground broke, and the two stone bricks remained firmly bonded together. Finally, he waved the hilt of the sword and knocked them hard, but he could only knock a small corner.
"Is this the effect of" cement "," Carter immediately realized its role, "it's incredible. Yesterday, it could still flow like the molten candle, and it was as solid as rock after only one night. With this kind of thing, the wall can be built as fast as you want. As long as there are enough stones, we can even build a city wall around the national border within five years! "
"What's the use?" Roland disapproved. "No matter how tall the fence is, it won't stop the enemies from the inside. I would rather turn the Border Town's dilapidated wooden house into a solid concrete room, so that my citizen will never have to Worried about being left homeless after a natural disaster. "
"..." Chief Knight froze. He didn't expect that Fourth Prince, which has all kinds of bad habits of noble, would say such things.
"You will see it in the future," Roland reaffirmed the way to go -- For many transmigrator, technology is the first productive force. And here, witch is the first productivity.