Live appraising treasures, I became a national treasure expert?

After the murals, there are copper pillars.

Zhang Guangchang took a highly magnifying glass and used a flashlight to fill in the light, and looked around the copper pillar carefully.

In addition to watching, I would also knock on it from time to time.

But for some reason, the longer he looked, the tighter his brows became.

What's going on? Something's wrong?

He Anbang raised his chin, and Li Ding'an shook his head slightly to reassure him.

Things are naturally right, and don’t be too right...

As time passed, Zhang Guangchang turned around several times and picked at the piece of rust that Li Ding'an had peeled off before.

After pondering for a while, he raised his head: "White copper?"

Li Ding'an nodded: "Gray copper!"

"Origin?"

"Mouding, Yunnan."

Others were confused as to what riddle the two men were playing.

Zhang Guangchang suddenly realized: "I understand!"

After a pause, he pointed to the document clerk again: "Record... Shape of vessel: cylinder. Purpose: ritual vessel. Inscription: star map. Casting process: Fan-casting. Anti-rust process: water-cooled quenching... Key points: Nickel-copper alloy..."

The data clerk quickly recorded it, and the others nodded frequently: As expected of a top expert, he can read quickly...

Hey, wait...

What did you say
He Anbang was stunned: "Professor Zhang, what did you just say?"

"How old are you when your ears don't work properly? Nickel-copper alloy..."

Didn't I hear clearly... I can't believe it: Where did the copper-nickel alloy come from in the Yuan Dynasty?

Is it such a big one?
He Anbang's eyes widened: "No... I remember, this thing was first recorded in "Ming Yi Tong Zhi"? And there is only one sentence: Ningfan Wei produced white copper?"

"That's right!" Zhang Guangchang nodded: "The smelting record is even later, recorded in the "Dynasty Huidian" compiled by Liu Yong during the Qianlong period..."

good guy?
Xiang Zhiqing was shocked and knocked on the copper pillar, "Li Ding'an, when was this pillar cast?"

"Roughly around Yuan Chengzong, no later than Yuan Renzong!"

"That's between 1294 and 1320?"

"Correct!"

Everyone understood:

When did Qianlong succeed to the throne?
1736 years.

This pillar has advanced the historical record of nickel and copper smelting in China by four hundred years...

The pen in his hand couldn't help but pause, and the document clerk looked stunned.

Wang Yongqian raised his head sharply.

Ma Xianming was excited and rushed towards the copper pillar. As soon as he stretched out his hand, he was slapped away by Xiang Zhiqing: "Get over there...you can't afford to pay for any scum that falls..."

Director Cheng was stunned for a while: "Li Ding'an, are you sure?"

"should be no problem……"

"It's definitely no problem!"

Zhang Guangchang pointed to the copper pillar, "There is too little rust, and there is only glaze rust formed by long-term oxidation with air in a dry environment, but there is no bone rust or floating rust. This is obviously contrary to common sense. Therefore, we cannot rely solely on baked copper to prevent rust ( This can be achieved by cooling and quenching to form a protective layer of copper oxide)...

At the same time, it also shows that the molecular structure is extremely stable...Looking at the color, it is green in the yellow and gray in the background. This is a typical color characteristic of light nickel-copper alloy..."

Just say that it has been there for hundreds of years, how come this thing is still so bright?

Because the biggest feature of nickel-copper alloy is rust resistance.

Haha... Big and difficult to cast are nothing, this is the real miracle.

He Anbang's eyes were shining: "Have you taken samples?"

"got it!"

"Where's the test data?"

Li Ding'an said nothing.

On the night he discovered the cave, he was watched. He couldn't even enter the laboratory door to conduct experiments on wool?

"Then why don't you tell me?"

"You are ready to cancel the application, what are you talking about..." Just halfway through, Li Ding'an met Director Cheng's gaze and smiled hurriedly: "When the materials team prepared the application materials, I asked them to make key remarks. …”

He Anbang was so angry that he wanted to grit his teeth: Why are you so scared? Why are you so scared? Why should you continue to bully me?

Director Cheng also wanted to grit his teeth: Until now, he still doesn't know what the material looks like. How many pages does it have in total?
"Anything else discovered?"

"It hasn't been excavated yet, nothing has been discovered yet, only a few inferences!"

"Tell me about it!"

"I speculate that compared with the same period, the metallurgical technology of this copper pillar is much more advanced. The reason lies in the temperature: the melting point of manganese copper is around 1,200, but it is only the melting point. The furnace temperature during actual smelting needs to be higher, at least It needs to reach one thousand fourteen to one thousand five. But the maximum temperature of charcoal can only reach about eight hundred, and the maximum temperature of high-quality coal is only one thousand two..."

yes?

Wang Yongqian frowned: "What are you practicing with?"

Li Ding'an thought for a while: "I suspect it is coke... But the earliest record of coking is recorded in "Little Knowledge of Physics" written during the Chongzhen period of the Ming Dynasty: Coal is produced everywhere, and the smelly ones are melted and turned into stone. Then it is chiseled into the furnace to make a char (coke), and the fire can be kept for five days to fry the ore and boil the stone, which is very labor-saving..."

It's equivalent to you advancing China's coking history by another three hundred years. Is that what you mean?

At that time, Europe had just begun to use coal to make iron.

Director Cheng sighed: "Continue!"

"Secondly, the design of the blast furnace is also advanced. If it is a single tube, no matter how many air bags there are, the air can only enter from one side, which will lead to uneven oxygen in the furnace, insufficient coke combustion, and the required temperature cannot be reached...so I suspect that the copper smelting blast furnace should have applied double-tube blast technology, or even multiple tubes..."

This is the physical and chemical knowledge of junior high school and high school. You can basically understand it.

Therefore, the more I think about it, the more likely it is that what Li Ding'an said is very likely...

"Are there any relevant historical records? Which one is the earliest?"

"Yes, "Tiangong Kaiwu" compiled by Song Yingxing in the Ming Dynasty!"

The copper pillars were cast before 1320... "Tiangong Kaiwu" was written in 1637.

Director Cheng was stunned: Does this mean you have advanced the historical record of metallurgical multi-tube blast technology by three hundred years?

"What about abroad?"

"About 1720, the United Kingdom introduced coking technology. I don't know where it was introduced from, but then they invented the double-tube blast furnace..."

Everyone was speechless for a long time.

A copper pillar broke three historical records?
Before, everyone thought this was just a Feng Shui-type site: strange enough, rare enough, and valuable enough. If verified, it could fill several historical and cultural gaps.

But I didn’t expect it to be more valuable?
No one has ever thought of technology and science at all, and in comparison, the latter is several times more important than the former.

For example: Even the British themselves are not sure where their coking technology came from?
Now you can try to make sure...

Another analogy: Mongolian porcelain.

Just a few dozen bottles and jars, put on the antique market, and probably no one asked, could they become a ministerial-level research project?
The reason lies in science and technology.

This is not to say that there is any benefit to modern technology, but to repair history and make the footprints of the nation's development process clearer.

On a larger scale, it traces its origins and enhances its influence in the world; on a smaller scale, it increases national pride.

After thinking about it, Director Cheng actually felt a little regretful: If it weren't for Li Ding'an, this place would still be just a barren mountain for another ten years... So when the Supervisory Committee came to the National Expo to ask for people, they should have persisted.

At the same time, he felt more dissatisfied: In order to find this cave, Li Ding'an had to eat every second. He sat on the top of the mountain in the cold winter, wrapped up in a torn cotton coat, and spent the whole night stargazing.

What about locally?
It's been a week, and you haven't even prepared the materials yet, and you're still doing all the dirty tricks?
This shows the lack of knowledge and the backwardness of the level: I don’t even realize what the “copper-nickel alloy of the Yuan Dynasty” means...

Wang Yongqian also sighed: I didn't understand before, why did Li Ding'an fight so hard to find this ruins?

Now I understand: Who can find this place but him?
Others have a similar mentality.

Of course, it was all their own imagination: Before entering the cave, how did Li Ding'an know about copper-nickel alloy, coking, and double-tube blasting?
The previous pillars were just ordinary iron sheets with no technical content...

Facing everyone's gaze, Li Ding'an didn't know what to say: Here we go again...like we're following the Martyrs Cemetery again?
The key thing is, there's still no way to explain it?
While sighing, a head poked out of the hole. Zuo Peng trembled and held his cell phone: "Li...Teacher Li, can you answer the phone?"

"Which one?"

"It's Secretary Mi!"

Li Ding'an looked at Director Cheng.

"Go pick it up... Tell the local leaders that there is no need to come up, we will go down immediately..."

After a pause, Director Cheng looked at him again and let out a long sigh: "Li Ding'an, remember: no matter how powerful a person is and how energetic he is, he only has two hands and two legs. There are only twenty-four hours...so no matter how anxious you are, one person can't finish all the work..."

In an instant, cold sweat broke out on Zuo Peng's head.

From another perspective, doesn’t this sentence mean: Others are not in a hurry, so why are you in a hurry?
Li Ding'an opened his mouth, not knowing what to say.

Inertial thinking kills people... Why do you do something wrong, you give me a gift?

Are you okay now? (End of chapter)