Senbao County, just 10 kilometers away from the southern mountain range.

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

In the city, the highest safety factor is the mysterious underground non-ferrous metal metallurgical workshop half the size of the city.

In the 21st century, the world is smelting, refining, and electrolysis to extract commonly used metals from non-ferrous metal ores or scrap miscellaneous metal materials.

Non-ferrous metals often referred to include gold, silver, aluminum, copper, nickel, lead, zinc, rare earths, etc.

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

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

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

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

Moreover, this metallurgical process is inefficient and has a long cycle.

The more advanced science and technology are, the more attention is paid to green environmental protection.

Non-ferrous metal is a non-renewable resource, and how to improve the metallurgical rate is also one of the research categories of scientific and technological civilization.

As early as 500 years ago, nanometallurgy was used in the global village.

To put it simply, only the raw ore with non-ferrous metal content needs to be fed into the sealed grinding equipment.

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

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

Finally, these metal ions are fed into a hydrostatic pressure device to cause the ion particles to interact with each other to form a stable structure.

This metallurgical process, without the need for traditional high-temperature calcination, can produce gold, silver, copper and other precious metals with a purity of up to 99.999%.

The final casting of the metal can also be directly generated according to the customer's model.

Using traditional metallurgy in the 21st century, one ton of gold ore can be refined into about 20 to 50 grams of gold.

Nanometallurgy, the same ore can be refined up to about 200 grams of gold!

Most importantly, this set of metallurgical equipment can also separate the associated ores in gold ore at the same time, such as silver, copper, lead, zinc, tungsten and other metal ions.

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

Nano metallurgy, the whole process is a closed operation of industrial robots, there is no air pollution and water and soil pollution.

The main thing is one: green environmental protection and high conversion rate!

Of course, such a set of assembly line equipment is worth hundreds of billions.

Mrs. You looked at the account that was still more than 700 billion village coins a month ago, but now it is abject poverty again, and scratched her scalp.

Yes, I've been busy for more than a year, and it's been for nothing again!

The shortest mountain in the Great Mountain Forest.

The industrial simulation robot sent to survey has uploaded the distribution map of the gold ore vein trend to the robot central control system of You Da Niangzi.

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

During a hunt, the former lord of Danabanzal City picked up several pieces of egg-sized dog's head gold nearby.

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

The reserves of these three precious metals, if all of them are refined, will not be less than 1,000 tons.

Not to mention that Mrs. You sighed many times in her mind that this island is so rich, just such a gold mine, and it is not the largest one on the island.

There is also the world's largest gold mine in the future, which is still in a state of ownerlessness!

In any case, these maps of mineral deposits have become the top secret of the new South Vietnamese state.

Excavation work began after opening an underground passage between the gold mine and Senbao County at a depth of 500 meters.

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

Precise positioning, drill bits that are as hard as diamonds, and extra-long conveyor belts.

From excavation to entering the underground metallurgical plant through the conveyor belt, it only takes about 20 minutes.

Simply enter the daily capacity requirement and the excavation robot will be able to mine the same amount of raw ore.

Proper on-demand production.

The first batch, with the head of the Lord of You on the front and the copper, silver and gold coins engraved on the reverse side, was brought back to Xianju City by the eldest prince a week later.

When Lord You saw those lifelike big avatars, his face blossomed.

A strong and modest said: "This, this, I'm afraid it's not appropriate to just print my avatar, right?" ”

The eldest girl is printed with his appearance when he was young, and he is very energetic.

"Daddy, Auntie said that our coins are minted once every five years, and only the head of the lord of the country is printed!" You Dalang laughed secretly, his sister's fart was so loud.

A certain father grinned, pretended to be modest for a while, and then smashed it for a while and asked: "Is there any saying that only prints the head of the lord of the country?" ”

"Of course, there is a saying, Hanhai Prefecture is so far away from Xianju City, and the people of the city will only know the appearance of the lord of the country through coins in the future!"

Xianju City belonged to the national capital of the New Nanyue Kingdom and belonged to the first place where coins were issued.

In the past, the upper door of the exchange center was replaced by [New Nanyue National Money Village].

The townsfolk came to see the excitement again, crowding on the counter of the money village one by one, craned their necks and pricked up their ears to listen to the news.

The counter of the money bank is used, nanocrystalline glass, which is harder than bulletproof glass, and everyone can only work through a window.

The tellers inside communicate with the citizens outside, and they also have to use loudspeakers.

"One centimeter is exchanged for one copper plate, and the maximum face value of the copper plate is one hundred Wen, that is, one hundred centimeters! One silver coin is worth 1,000 centimeters, and one gold coin is equal to ten silver coins!

All future commodity trading and personal transactions in Xianju City and Hanhai Prefecture will be common to all bracelets and coins!

The advantage of the centimeter bracelet is that it is easy to carry and safe, but out of the new South Vietnam country, our centimeters are useless!

Coins are different, they can be used in any country, and our coins have a protective film on them, so they won't change color even if you bury them in the soil for hundreds of years."

Coins of various denominations are placed on the display case of the bank, and everyone is allowed to visit.

Not to mention, these exquisitely crafted, globally accepted and value-preserving coins were more popular than the bankers expected.

By the end of the morning, more than half of the families in the inner city had decided to exchange half of their centimeters.

The aunts are most interested in the golden gold coins.

"I just like this color, it looks extravagant! Going back and marrying my daughter for six yuan, that's too face-saving. ”

"Sister-in-law! 10,000 centimeters can be exchanged for a gold coin, it is better to exchange it for 10 silver coins, this white silver coin is also very good! You change it for sixty-six pieces and put it in the bottom of the pressure box! ”

"I don't want to use such beautiful gold and silver coins, let's replace them with copper plates! When you buy something with a bracelet, you don't feel sorry for the price, and the copper plate is counted. ”

"Alas, you're still an old man who will live" (end of this chapter)