The King of Quick Travel got the wrong cannon fodder script!

Chapter 471 The eldest princess in the giant pit (two hundred and twenty-one)

Senbao County is only ten kilometers away from the southern mountains.

The entire city is protected by a high-voltage city wall ten meters high, three meters wide, and ten kilometers long.

Inside the city.

The one with the highest safety factor is the mysterious underground non-ferrous metal metallurgical workshop half the size of the city.

twenty-first century.

Commonly used metals are extracted from non-ferrous metal ores or scrap metal materials around the world through smelting, refining, and electrolysis.

Non-ferrous metals that people often talk about include: gold, silver, aluminum, copper, nickel, lead, zinc, rare earths, etc.

In metallurgical technology, the most commonly used method is the greening method.

The so-called greening method is to immerse finely ground mineral particles in sodium cyanide (potassium) solution, then use zinc powder to reduce the precipitate and precipitate the metal.

Among them, the cyanide used is a highly toxic chemical.

Cyanide is in direct contact with the external environment, making pollution difficult to control and posing a great threat to surface water, groundwater and soil.

Moreover, this metallurgical process has low efficiency and long cycle time.

The more advanced science and technology becomes, the more attention it pays to green environmental protection.

Nonferrous metals are a non-renewable resource. How to improve the metallurgical rate is also one of the research areas of scientific and technological civilization.

As early as more than five hundred years ago, nanometallurgy was used in the global village.

To put it simply, you only need to feed the raw ore with the non-ferrous metal content into the sealed grinding equipment.

The grinding equipment will grind the raw ore into ultra-fine powder in nanometer units.

Then through separation equipment, various metal ions in the powder are separated.

Finally, these metal ions are fed into a static pressure device to cause the ion particles to interact and form a stable structure.

This metallurgical process can produce gold, silver, copper and other precious metals with purity as high as 99.9999% without traditional high-temperature calcination.

The final metal casting process can also be generated directly based on the customer's model.

Using traditional metallurgy in the 21st century, one ton of gold ore can produce approximately twenty to fifty grams of gold.

With nanometallurgy, the same ore can extract up to about 200 grams of gold!
The most important thing is that this set of metallurgical equipment can also separate associated ores, silver, copper, lead, zinc, tungsten and other metal ions in gold ore at the same time.

Even these tailings powder can be statically pressed into bricks as strong as steel.

The entire process of nanometallurgy is a closed operation of industrial robots, and there is no air pollution or water and soil pollution.

The main thing is one: green and environmentally friendly, high conversion rate!
Of course, such a set of assembly line equipment is worth hundreds of billions.

Mrs. You looked at the account that had more than 700 billion village dollars a month ago.

Now after building several cities and buying equipment, we have returned to abject poverty.

Scratched his scalp.

Okay, after more than a year of hard work, it was all in vain!
The shortest hill in the forest.

The industrial simulation robot sent for survey has uploaded the gold mine's vein trend distribution map to Madam You's robot central control system.

The largest veins of the gold mine are hidden more than 300 meters at the tail of the southern mountain range.

The former lord of Danabanchar City picked up several pieces of gold nuggets the size of eggs nearby during a hunting trip.

What he didn't know was that the most precious part of the mine here was that the associated mines 600 meters below the gold mine also contained a large amount of copper and silver ores.

The reserves of these three precious metals, if they were all extracted, would not be less than a thousand tons each. Madam You had lamented many times in her mind that this island was so rich that just such a gold mine was not the largest one on the island.

There is also a gold mine that will be the largest in the world in later generations, but it is now ownerless!

Anyway, these mineral distribution maps have become the top secret of the new South Vietnam.

Excavation work began only after opening an underground passage 500 meters underground between the gold mine and Senbao County.

Industrial mining robots are not afraid of any severe cold or high temperature and can work normally in an oxygen-free environment.

Precise positioning, a drill bit as hard as diamond, and an extra-long conveyor belt.

From excavation to entering the underground metallurgical plant through the conveyor belt, it only takes about twenty minutes.

Just enter the daily production capacity requirements, and the mining robot can dig out the same amount of raw ore.

Proper on-demand production.

The first batch of copper plates, silver coins and gold coins, with the portrait of Lord You printed on the front and the national flower Paphiopedilum engraved on the reverse, were brought back to Xianju City by the eldest prince a week later.

When You Guozhu saw those lifelike portraits, his face lit up with joy.

He kept saying modestly: "Well, well, it's probably inappropriate to just print my face, right?"

The eldest daughter's face is what he looked like when he was young, very energetic.

"Dad, my sister said that our coins are minted once every five years, and only the head of the king is printed on them!" You Dalang laughed secretly. His sister's flattery was so loud.

A father grinned and pretended to be humble for a while, then hesitated for a while and asked:
"Is there any point in printing only the head of the country's leader?"

"Of course there is an explanation. Hanhai Prefecture is so far away from Xianju City. From now on, the city residents can only know the appearance of the king through coins!"

Xianju City is now the capital of the new Nanyue Kingdom and the first place where coins are issued.

In the past, the door of the exchange center was replaced by [New Nanyue Bank].

The citizens came to watch the fun again.

One by one, they crowded on the counter of the bank, stretching their necks and listening to the news.

The counter of the bank uses nanocrystalline glass, which is harder than bulletproof glass. Everyone can only do business through a window.

The tellers inside have to use loudspeakers to communicate with the citizens outside.

"One centimeter is exchanged for one copper coin. The maximum face value of a copper coin is one hundred cents, which is one hundred centimeters! One silver coin is worth one thousand centimeters, and one gold coin is equal to ten silver coins!
All future commodity sales and personal transactions in Xianju City and Hanhai Prefecture will be shared by common bracelets and coins!

The advantage of the centimeter bracelet is that it is easy to carry and safe. However, outside the new South Vietnam country, our centimeter bracelet has no use!

Coins are different. You can take them to any country and use them!
Moreover, there is a protective film on our coins, so even if you bury them in the soil for hundreds of years, they will not change color."

Coins of various denominations are placed on the bank's display cabinet for everyone to view.

Not to mention, once these coins were launched, these exquisitely crafted, globally applicable and value-preserving coins were more popular than the bank staff expected.

One morning passed, and more than half of the families in the inner city decided to exchange half of their centimeters.

What the aunts are most interested in are those golden gold coins.

"I just like this color, it looks noble! It would be so honorable to give my daughter six yuan as a dowry."

"Sister-in-law! Ten thousand centimeters can be exchanged for one gold coin. Why not exchange it for ten silver coins? This silver coin with a smooth white color is also very good! You can exchange it for sixty-six yuan and put it in the bottom of the press box!"

"I can't bear to use such beautiful gold and silver coins. Let's change them to copper plates! When you use a bracelet, you don't have to worry about the price when buying things. Copper plates are valuable."

"Oh, you're still an old guy who can live a good life."