Release that Witch

12. Chapter 12 Burning

    Roland stood in the backyard of the firing room waiting for the first batch of cement to come out.

    This brick house was designed for cement production and is about 15 meters long and 4 meters wide. There is a front and rear door, the difference is that the front door is as spacious as possible for people to carry materials. The back door is only one person wide, allowing Anna to sneak into the firing room.

    To this end, he also built a circle around the half-waist of the house, surrounded by the second half of the firing room, and the entrance and exit arranged with Knight guards – they are Carter’s subordinates, loyalty is beyond doubt.

    The production process of cement is simple. The limestone is crushed into powder and mixed with clay and iron powder. The mature material is calcined by dry or wet method, and then ground with gypsum. The raw materials are very common, and the iron powder is difficult to produce in large quantities. The key is the calcination temperature of the clinker.

    The specific temperature required to burn cement Roland does not remember, even if he remembers he can not measure and control temperature – whether it is infrared thermometer or thermocouple temperature gun is more complicated than cement. He only knows that this temperature is almost similar to the Melting Point of iron, and the calcination process is also a difficult time to produce cement.

    In the era of underdeveloped smelting technology, maintaining the blast furnace temperature has always been a problem that plagues everyone. The heat loss of the ordinary open furnace is extremely large, and it is difficult to keep the furnace temperature above 1200 degrees. The reverberatory furnace needs a high temperature resistant liner, and he will not think about how to make refractory bricks for a while. The traditional iron-making blast furnace is even worse. The temperature may reach the standard, but the narrow furnace cavity is used to calcine the cement. I am afraid that the Months of Demon will not burn enough.

    Therefore, Roland designed the firing room without any heating measures. He relied on Anna.

    The small-grained limestone which is manually broken is mixed with clay and mixed with water to form a slurry, which is evenly spread in the firing chamber. Then Knight locks the door and clears the handyman. Anna enters from the back door and lets the flame bake the slurry on the floor until the iron rods placed inside the room melt.

    Roland is a little restless, this is the first step in his stay at Border Town’s. If you can’t make cement, the plan to build a wall in three months is just empty talk. There is no wall blocking, I am afraid that no one is willing to stay in this ghost place. Whether it is real history or fictional literature, if you want to farm well, a stable base is essential.

    “His Royal Highness, can you really stick the stones together?”Asked by Carter Lannis, who is next to Fourth Prince. Although the prince told him that this is the latest research by Greycastle alchemical workshop, he still believes. After all, the gang did not make any really reliable alchemy products.

    Who knows? Anyway, they said this,” Roland said.

    This world alchemy technique, together with astrology, is known as the Sage, and is very popular in mainland countries. The royal family will generally train their own alchemy and astrologer for secret drug refining and predicting fate. For ordinary people, these studies are too high, so that the mentality of blind faith has arisen. With this in mind, Roland naturally brought the source of the cement formula to the alchemical workshop. As for Chief Knight, believe it or not, it doesn’t matter.

    The flame that came out of the window gradually went out, and it looked like it was burnt.

    Roland greeted him and stood up, driving Carter out of the yard and waiting alone in front of the back door of the brick house.

    The iron door slammed open and Anna squatted out. Roland put her robes on her for the first time and gave her a glass of water. “How?”

    The face of the witch is gray, although the wet process of the cement is low, but the hot air will still bring dust when it is calcined. For her who can’t wear a mask, it will not be too comfortable to stay in it for dozens of minutes. She coughed twice and nodded. “The mud has turned gray.”

    Roland couldn’t wait for the temperature in the firing room to drop low enough. He wrapped the wet towel around his head and grabbed the shovel into the back door.

    The hot air instantly surrounded him. He felt a little difficult to breathe at one time, and the skin on his hands was painfully roasted. Fortunately, it takes too much time to shovel a ash, otherwise it will be a few minutes in this environment to cause high temperature shock.

    “This is what you want?”After Anna put the witch suit on, she looked over and asked.

    “It looks a lot like it,” Roland flattened the powder and felt the rest of his temperature with his fingers. “You don’t have to try it until you know what to do.”

    “what’s it for?”

    “To build a house, build a bridge, and build a road, there are too many places to use. If it succeeds, the people’s homes will not be afraid of the cold, and heavy rain and heavy snow will not be destroyed. ”He patted the little girl’s head with the other hand. “It is the embarrassment that you made.”

    Anna bowed her head. I don’t know if it is an illusion. He thinks that the girl’s breathing is getting faster.

    Theoretically, the cooked clinker is ground with gypsum to adjust its hardening time. But there is no need to think about it at this time. Roland took a break and then shoveled out two. Then he called Carter, who was standing outside the hospital, and asked him to prepare cement mortar in proportion to three portions of lime powder.

    The Chief Knight didn’t even care about doing some rough work. For him, doing this kind of thing is much better than fighting for His Highness in Greycastle or hooking up the Miss Noble.

    Since there is no joining iron powder in the raw material, the color of the cement paste is pale and white. Roland poured them all over one stone and buckled the other. The solidification time of the cement is about four hours. Considering the instability of the prototype, he intends to wait until tomorrow to see the results.

    Early the next morning, Roland hurriedly took Carter and Anna to the backyard of the firing room. Pushing the door open, he noticed that the cement’s appearance was solidified and tightly joined to the two stone bricks. The consolidated surface looks rugged and hoarfrost appears in some locations.

    Roland squatted down and scraped off the hoarfrost from the alkalization reaction. He pressed the hardened cement with his fingers. The touch made him feel happy. The cement surface was strong and the hand was completely different from the touch after the soil was compacted. You can’t leave a trace on it.

    After Carter got the Fourth Prince, he tried to lift the stone bricks but failed. He kicked a few feet from the side until the joint between the cement and the ground was broken, and the two stone bricks remained firmly bonded together. Finally, he waved his hilt and hit them hard, and he could only knock a small corner.

    “Is this the effect of “cement”?” Carter immediately realized the role of it. “It’s incredible. Yesterday it could flow like a melted candle, and it was as rocky after only one night. With this kind of thing, how fast the city wall wants to build can build. As long as there are enough stones, we can even build a wall around the border in five years! ”

    “What use is that?”Roland didn’t take it for granted. “The tall walls can’t stop the enemies from inside. I would rather turn the Border Town’s dilapidated wooden house into a sturdy concrete house, so that my citizen no longer has to worry about being homeless after a natural disaster. ”

“……”The Chief Knight stunned, and he really didn’t expect that the Four Prince, who had a variety of noble habits, would say such things.

    “You will see it later,” Roland reaffirmed the path he was going to take – technology was the number one productivity for many passers-by. Here, witch is the first productivity.