Natural disaster at the beginning: I will lead the system to build a safe zone

Early this morning, Li Changlin brought Li Yan and a few others to Shi Anan's home to listen to her lectures.

"Teacher, we are here." Li Changlin greeted Shi Anan as he entered the room.

For them, Shi Anan can indeed be called a teacher. Without Shi Anan, they would never feel the charm of mathematics, physics and chemistry.

At first, they called her Master, but Shi Anan stopped them. She was really not used to it, and always felt like a pedantic scholar with a mustache.

But the ancients respected teachers very much, and several people did not dare to call her by her name, so she asked Li Changlin and others to call her teacher. This title didn't sound so strange after getting used to it.

Although Li Changlin and others did not understand why she wanted them to call her teacher, since the teacher liked it, they let them call her that.

"Now that you're here, please sit down." Shi Anan pointed to the seats in the study.

Now the study room in her house has been transformed into a small classroom, equipped with desks, blackboards and other facilities.

Shi Anan continued her lecture: "I called you here today mainly to tell you how to make something like glass and what its functions are."

"First of all, we need to know what glass is. You may not understand when I say glass, but have you ever heard of colored glaze?" Shi Anan asked.

Li Changlin replied, "I heard from Brother Zimu before that there is a kind of stone called Liuli that is colorful and as dazzling as gemstones. Even the emperor would love it if it was made into an item. But ordinary people like us don't have the opportunity to see it. Brother Zimu also heard about it from some classmates from wealthy families when he was taking the exam for the scholar."

Shi Anan nodded: "Yes, colored glaze is actually made in the same way as glass. It is actually also called colored glass."

Li Yan opened her mouth in surprise: "If we learn how to make glass, wouldn't we be able to make such priceless colored glaze?"

"So what if you make priceless colored glass? There's no emperor to pay tribute to you now." Zhang Sheng, who had passed the class test before and followed Shi Anan to choose for a while, continued.

"That's right." Li Yan's tone was a little disappointed.

"Everyone, what we are discussing now is not the tribute." Shi Anan knocked on the blackboard to bring everyone's thoughts back to the track.

"I'm telling you about colored glass because I want you to have a general understanding of glass. What we want to make is not colored colored glass, but transparent glass."

"Glass has many uses. It can be used to make windows, doors, and mirrors. It can also be used to make many scientific instruments that you have seen in books. Of course, it can also be used to make ornaments of various shapes like colored glaze. It is very practical. It would be a waste to just give it as tribute and collect it."

She wanted to make glass, not to offer it as a tribute to the emperor, but to make everyone's life better.

"Teacher, please continue talking and don't listen to their nonsense." Li Changlin said.

"Yes, yes, I was just joking. I wasn't really thinking about paying tribute." Zhang Sheng nodded repeatedly.

Shi Anan hummed and continued to explain to everyone: "To make glass, you must first understand its ingredients. It is mainly composed of quartz sand, sodium carbonate (soda, soda ash, etc.) and limestone. By mixing these main materials in proportion, you can get glass. The mixing ratio varies according to the requirements of the final product."

"You have all seen limestone. As for sodium carbonate, I have taught you the chemical equation before. You can use limestone and salt as raw materials to make soda ash. As for the production process, you need to go back and try it more. This is also the homework assigned to you."

In fact, soda ash can also be obtained by evaporation and crystallization from alkaline lakes, which is also the most convenient method of making alkali. However, there is no trace of alkaline lakes around them, so if they want to make alkali in large quantities, they can only do so through chemical synthesis.

"Teacher, what is quartz sand?" Li Yan raised her hand and asked.

"That's what I'm going to talk about next. Quartz sand is actually a type of sand. It's a natural mineral resource. It's usually collected from riverbeds, gravel or mountains and then crushed and processed for use."

"But you don't need to find a way to get the quartz sand this time. I have already prepared some ready-made. Although the quantity is limited, it is enough for the initial stage. As for the future, it depends on whether we can find a quartz sand vein."

Shi Anan took out a handful of quartz sand from her backpack and passed it to everyone to see.

Li Changlin said in disbelief: "Glass is actually made of sand?"

When he had heard about the preciousness of colored glass, he had also thought about how valuable something like this would have to be made of, but now the teacher told him that it could be made with just sand.

Shi Anan nodded: "Yes, in fact, the materials used to make glass are not very valuable. As long as you know the principle, it is still easy to make."

"After mixing these glass-making materials, they need to be melted. To melt the sand, the temperature must reach above 1500 degrees Celsius. This temperature was very difficult for us to reach in the past, but now that the iron smelting workshop has a blast furnace and coke, it is not impossible to reach this temperature or even exceed this temperature..."

After finishing the class, Shi Anan led them to start developing glass. Time always flies when you concentrate on doing something.

Before she had developed the glass, the village chief came to her and said that the land needed for the orchard had been cleared.

Shi Anan was a little surprised: "50 acres of land have been cleared? So fast!"

The village chief chuckled and said, "It's all thanks to the road workers. Our orchard is located nearby, so they helped out when they were free. That's why the cleanup was done so quickly."

Hearing what the village chief said, she remembered that she had been concentrating on studying glass for some time and had not paid much attention to the progress of road construction.

She thought for a moment and said, "Then take me to have a look. I'll also take a look at how the road is being repaired."

Shi Anan followed the village chief to the back mountain. It was afternoon and the workers were busy. Few people noticed her coming.

Looking closely, I found that the trees that had previously blocked the view had now all been cleared away, and the field of vision had suddenly become much wider.

The bumpy dirt road has now become smooth in the visible part, and only a final layer of cement is needed.

Although I don’t know how long it will take, the efficiency is already extremely high considering the current productivity, and Shi Anan is very satisfied.

Without worrying about the road construction for the time being, she first walked around the 50 acres of land she had opened up to make sure it was enough for her orchard. She then made up her mind and decided to get the orchard done as soon as possible.

But it’s a bit late today. If we leave the orchard open now, it might be too late to irrigate it, so let’s come back tomorrow morning!