I make a popular science video and all the emperors learn from it!

See the role of plaster in medicine and food.

The ancients are not calm anymore!!

The doctors of all dynasties almost cried with joy!

After a long time, the prescription finally appeared again!

And it's a full six!

These prescriptions may hurt ordinary people's brains, but they are accustomed to them and can easily understand them.

Without any hesitation, the doctors immediately took out pen and paper and wrote down all the prescriptions.

In ancient times, ordinary people recorded the detailed dosage of gypsum in making tofu, soy milk, and dried tofu.

What if you can use it later?

[Popular science continues.] 】

【Gypsum resource status:】

[Natural gypsum is a gypsum stone contained in nature, mainly gypsum dihydrate and anhydrite. 】

[Huaxia gypsum mineral resources are abundant, and the total proven reserves of various types of 23 gypsum are about 57 billion tons, ranking first in the world, and distributed in 23 provinces, municipalities and autonomous regions......]

[Huaxia gypsum resources are mainly ordinary gypsum and anhydrite, of which anhydrite accounts for more than 60% of the total, as a high-quality resource of special grade and first-class gypsum, accounting for only 8% of the total, of which fiber gypsum accounts for only 1.8% of the total. 】

Therefore, we are a poor country with large gypsum reserves and high-quality gypsum reserves. 】

【......】

【The main production area of gypsum:】

[The world's largest gypsum producer is the United States. 】

[In the United States, gypsum deposits are distributed in 22 states, with a total of 69 mines. 】

[Followed by Canada, FA country is the leading country in gypsum production in Europe......]

[Gypsum deposits, distributed on the world map as follows:]

The light curtain is very intimate with small green dots and the shades of green dots to indicate the size of gypsum reserves around the world.

Where there are more green dots and darker colors, the larger the reserves.

Make it clear at a glance that you want to dig plaster.

Where to go.

【...】

Qin Dynasty.

Ying Zheng was shocked.

Not the various effects of shocking plaster, but the miraculous operation of the light curtain.

It even clearly marked the distribution of gypsum deposits in the world!

What does that mean??

Encourage and motivate him to grab !?

As an emperor, how could he act according to the ideas of others!

Except, of course, this time.

Ying Zheng almost didn't hesitate, and immediately shouted: "Come on, quickly write down the distribution of the plaster!"

"The first mining in the territory of Qin. "

"As for those overseas, let others keep them for the time being. "

Yuan.

Kublai Khan's expression was ecstatic!

He just likes this simple and crude way of labeling!

Where there is plaster, how much, he can see it with a sweep of his eyes!

For him, the difficulty is not to defeat the enemy, but to find where the enemy is.

Now he has a clear goal!(Read the violent novel, just go to the Feilu Novel Network!)

Whoever occupies his gypsum mine is his enemy!

"Hahaha, I love this light curtain. Kublai Khan laughed heartily, but his gaze was very sharp.

There are good things, don't grab them.

It's never been his style!

Ming dynasty.

Zhu Di quickly completed the transformation of identity.

Now he wants to be the head of the colonial empire, and he is no longer satisfied with the emperor of the Ming Dynasty!

He stared at the light curtain, and after only a few breaths, he remembered the distribution of the plaster in his mind.

This is a skill he has developed by fighting wars all year round and often looking at maps.

Zhu Di clapped his hands and praised: "Using a small green dot to indicate the location of the mine, and the color shade to indicate the reserves, is really a good way, and I also have to learn." "

He retrieved a new map of the world.

I dipped my pen in green dye and started marking on the map.

If there are other minerals in the future, you can continue to use this map, as long as you change the color.

[Popular science continues.] 】

[Bauxite actually refers to the general term of ore that can be used in industry and is composed of gibbsite and diaspore as the main minerals. 】

Bauxite is the best raw material for the production of metallic aluminum. 】

It is also the most important application field, accounting for more than 90% of the world's total bauxite production. 】

[The application field of bauxite has two aspects: metal and non-metal, and the proportion of bauxite in non-metal is small, but it is widely used. 】

810【Main Applications:】

【Bauxite ore is used for a variety of purposes:】

[(1) Aluminum-making industry. 】

[Used in national defense, aviation, automobiles, electrical appliances, chemicals, daily necessities, etc.] 】

[(2) Precision casting. 】

[Bauxite clinker is processed into fine powder and made into a casting mold and then cast. It is used in military, aerospace, communications, instrumentation, machinery and medical equipment departments. 】

[(3) Used in refractory products. 】

[The refractory degree of high bauxite clinker is as high as 1780, with strong chemical stability and good physical properties. 】

[(4) Aluminum silicate refractory fiber. 】

[It has the advantages of light weight, high temperature resistance, good thermal stability, low thermal conductivity, small heat capacity and mechanical vibration resistance. It is used in steel, non-ferrous metallurgy, electronics, petroleum, chemical industry, aerospace, atomic energy, national defense and other industries. 】[]

[It is to put high-alumina clinker into a high-temperature electric arc furnace with a melting temperature of about 2000~2200, and after high-temperature melting, high-pressure high-speed air or steam injection, and cooling, it becomes a white "cotton" - aluminum silicate refractory fiber. It can be pressed into fiber blankets, boards or woven into cloth to replace refractory bricks lined with industrial high-temperature kilns such as smelting, chemical industry, and glass. 】

[Firefighters can use refractory fiber cloth to make clothes.] 】

【......】。