Short video spoiler history: The beginning of modern warfare

Chapter 61: Did the floor finally confess?
Zhu Yuanzhang suddenly discovered a problem, that is, he did not know elements such as chlorine, sodium, and iodine, let alone sodium chloride, silver iodide, etc.

This is an extremely tricky problem. In fact, except for some metal elements such as copper, iron, gold, silver, and carbon, other elements on the periodic table seem to have never been seen. We just know that these elements exist.

"Do you know what sodium chloride and silver iodide are?"

"This..." The civil and military officials discussed for a while, but no one could say anything.

Zhu Yuanzhang had expected this result, so he asked again: "What is dry ice?"

"Your Majesty, if we follow the naming rules of later generations, it may be related to the ice cubes that are common in winter. I just don't know what the difference is between dry ice and ice cubes." Hu Weiyong stepped forward and said.

"."

Liu Ji had a blank expression on his face, but he actually didn't care in his heart. Wasn't this just nonsense?

Zhu Yuanzhang asked other people for their opinions, but still couldn't get a definite answer, so he could only put these questions aside for the time being and turn his attention back to the sky.

The sky screen was still repeating the scene of an airplane spreading catalyst. The airplane was flying above the clouds, and above it was the boundless blue sky. Below the airplane were clusters of pure white clouds, overlapping each other, like balls of cotton stacked there.

The clouds are endless and stretch far into the sky.

"This is probably the place closest to the sky." Zhu Biao exclaimed, feeling heroic in his heart.

"nice!"

"If Li Bai were alive today, I wonder what magnificent poems he would have written upon seeing this wonder!"

"I wonder what the clouds feel like to touch." A clerk rubbed his wrist and imagined the scene in his mind.

The sky screen switches again, and the scene looks like a coal mining area?
[Why does the newly mined coal need to be washed before it can be used? 】

[In fact, this process is called water-washed coal preparation, and coal washing is a necessary process after coal mining]

[Because the newly mined coal will be mixed with various impurities and dust
[The first purpose of coal washing is to remove dust from the raw coal. If the dust in the raw coal is not removed by washing, the dust will float on the coal and easily ignite and cause a fire.]

[In addition, dust can also cause environmental pollution, so it is very necessary to remove dust]

[The second is that coal washing can improve the utilization rate of coal. Coal washing can remove 50%-80% of the ash in the raw coal and 30%-40% of the inorganic sulfur, thereby improving the quality of coal]

[Experiments have shown that for every 1% reduction in coal impurities, combustion efficiency can be increased by 4%]

[Moreover, many impurities and sulfur in raw coal will affect steelmaking, so unwashed coal cannot be used for steelmaking.]

During the Hongwu period, Jinling City.

Zhu Yuanzhang listened patiently to Tianmu's introduction, and his eyes suddenly lit up: "Is this the purification of coal?"

He knew that the mined coal contained impurities. Such freshly mined coal could not be used directly to make steel. It had to be refined into coke first.

In fact, any mined ore contains impurities to a greater or lesser extent, such as iron ore.

And can so many impurities be removed by just washing with water?

"This may be an improved technology invented in later generations!" A group of ministers discussed it. Before this, because of Tianmu's introduction, many people had more or less some understanding of and use of coal.

"Looking at the progress of the video, I'm afraid these are not the end of this video." Zhu Biao said excitedly as he looked at the progress of the video.

"Your Highness is right!"

When the clerks saw it, they also wrote quickly, fearing that they would miss it. After all, His Majesty attached great importance to these craft techniques.

[In addition, this is also a method of coal screening, that is, washing process]

[It uses the density difference between coal and gangue to separate them with water]

[Then commercial coal of various specifications can be screened out, which is a means to improve the quality of commercial coal]

[So how can we separate them in water? Due to their different densities, they will have different settling speeds and suspension characteristics in water.]

[Then you will also find that this assembly line is always jumping, and the water is actually pulsating up and down]

[The density of coal is lighter than water, so it will float to the upper layer, and the water flow will wash it away into the channel on the right]

[The density of coal gangue is greater than that of water, so it sinks downwards and is finally discharged through the slag discharge mechanism, which naturally separates them and then flows to different routes]

During the Zhenguan period, Chang'an City.

"Great!" Li Shimin clapped his hands in admiration. From the sky, one could see that the water flowed back and forth, pushing the lighter coal into the channel on the right, while the heavier impurities such as gangue or stones were blocked by the baffle and then slowly fell to the channel below, thus completing the distinction between clean coal and gangue, rock, etc.

"Does coal have this property?" Fang Xuanling couldn't help but admire it. This method is actually very simple, yet very clever.

All the knowledge learned from the sky dome contains some clever ideas.

If this ingenious technique and method had not been mentioned by Tianmu and allowed to develop naturally among the people, it would probably have taken at least several decades from the discovery of this method to its promotion.

"Tianmu said that this method can improve the quality of coal, and then it can be used to make steel?" Li Shimin thought excitedly. The current method of using coal to make steel is not mature.

If steel can really be made from coal, then the huge coal mines underground will be an important source of power for the Tang Dynasty to make a big step forward.

After all, there is steel everywhere in the future world of the sky, and such a huge consumption of steel cannot be achieved by cutting down trees.

The coal washed by the water-washing process is of higher quality and has higher combustion efficiency, and can produce more steel. The swords, armor, etc. of the Tang Dynasty army can be further improved, and their combat effectiveness can be raised to a higher level, which represents an improvement in the domestic people's livelihood, etc.

If coal can be mined on a large scale, there will be many benefits, as we have deduced before.

[It is also necessary to understand coal gangue here. It is a black-gray rock that is mixed in the coal during its formation. It has a relatively low carbon content and produces harmful gases when burned.]

[Just understand it this way, the higher the gangue content in the coal, the worse the quality of the coal and the lower the combustion efficiency, so it must be separated]

[The water used for coal washing is also recycled, and there is a sewage treatment system]

[Using many huge sedimentation tanks, sedimentation is done level by level, and the precipitated water is peat, which can also be reused. The treated water can only be discharged after it becomes clean.]

[In fact, not all coal is washed with water. It mainly depends on the purpose. In addition to water washing, this screening process also includes air separation, gravity separation, flotation and other methods.]

[For example, the coal used in steel mills must be clean coal, and various screening methods will be used] [Because the sulfur content, dust, and impurities in the coal will affect the quality of the steel]

[You should understand it now. Washing with water is a screening process. The washed coal is called clean coal, which has better quality and is more expensive.]

During the Hongwu period, Jinling City.

Zhu Yuanzhang let out a long sigh. To his surprise, this water washing process was extremely important, yet very simple.

It turned out to be simply washing the coal with water, and here comes a new word: density.

It's a bit like how stones are heavy so they sink, while wood is light so it floats. I guess it's just the difference in density.

"This density should be different from weight!" Hu Weiyong said after thinking for a while. There seems to be some trick in this, but the feeling is rather mysterious and he can't grasp it.

"I agree. Since later generations used the word density instead of weight, it means they should be two different things."

Zhu Yuanzhang thought about it again and nodded in agreement with this point of view.

"Here comes some cool knowledge: Gangue is a kind of stone, not coal, it cannot be burned and is worthless. But how can we make worthless gangue worth the price of coal? That is to mix gangue into coal and then sell it to thermal power plants [狗头]"

"I've finished watching it. The coal washing water was finally discharged [狗头]"

"Don't discharge it, recycle it, water is very expensive"

The sky screen switched again, this time from a high-altitude perspective.

[Do you know that it is easy to make me catch a cold if I fan you like this? #GuizhouDialectSpeak]

From the sky, you can see that the man is chasing the rat with a white water pipe.

The rat jumped up from the corner, crawled under the man's feet, then stopped in front of the elevator door, struggled to take a few small steps, and was too scared to move.

The man hit the mouse with the water pipe again and again, faster and faster, with great momentum. The water pipe became shorter and shorter, and finally the mouse stopped and was hit a few more times.

However, not a single blow was struck.
Then a human face that seemed to be growing on a mouse's body began to rap.

[Mouse: Brothers, don't take the elevator. If you run into Si'er, you'll get beaten up.]

[Mouse: Okay, big brother, can you please calm down a bit with this French method?]

[Mouse: I don’t even know how to dodge when you hit me with those big sticks]

[Mouse: It's not appropriate for you to do this without telling me the reason]

[Mouse: If I am really guilty, you can punish me with the law.]

During the Hongwu period, Jinling City.

Zhu Yuanzhang felt as if his head had been hit a few times and was buzzing.

It's just that I don't know why I can understand this Guizhou dialect.
Not only him, many ministers would choose to drink some water to moisten their throats when the sky screen was restarted or switched.

Now, they all spurted out.
Is this what later generations called "Chuan"?

In the Hexing Tea and Snack Shop, the waiters were forced to get busy again.

This so-called rap is catchy and the melody is extremely magical, so after listening to a few sentences, many people have figured out the rules of the rap.

There were also people who were curious and recalled carefully, vowing to count how many times he hit people with the stick.

[Floor: Hey, little brother Haoer, your situation is not bad.]

[Floor: When he hits you, you can still lift your legs and run]

[Floor: Unlike me, he pinned me to this spot and I can’t move.]

[Floor: I didn’t hit you in eight strokes, but I didn’t miss a single stroke]

[Mouse: Even though it didn't hit me, it still made my heart beat fast]

[Mouse: I tried all kinds of fancy moves but it still doesn’t feel good]

[Mouse: Just fanning me can give me a cold]

[Mouse: Looks like I have no choice but to go to Hades today to file a complaint]

[Water pipe: It means I was just punching the air the whole time]

[Water pipe: Even if you go to hell, you can't tell me a single thing]

[Water pipe: I advise you not to talk about this, it is meaningless]

[Water pipe: He doesn’t even know how to remember your outrageous cause of death]

《老鼠：他好吓人他掏出了10米……9米……7米……5米……3米的棍子疯狂打我[哭]》

"Mouse: I'm not lying, I'll give you 100 draws when you go online"

The mouse finally died of tinnitus [covering face]

"I guess only Yunnan, Guizhou and Sichuan know how cool this rap sounds [covering face]"

"This is how it came about when they were so far apart"

"We Keep the Promise [Smile]"

"Did the floor recruit in the end?"

During the Zhenguan period, Chang'an City.

Li Shimin and his ministers, who had been trying their best to be patient, lost their patience in a second after seeing the comments section.
(End of this chapter)