The strongest commander in the last days

Chapter 319 Give up your life and give it to the world

Not to mention the changes in the Air Overlord, the moment I purchased it, the right arm of the T-95 power mecha lit up, and its structure changed again.

"Several new dashboards and buttons have been added, let me try."

I saw the mech swinging its arm, the box cover on the wrist was opened, and the thick chain with blades popped out like a snake.Immediately, it tightened and combined to form a sword, judging from the cold light of the blade, it was definitely extremely sharp.

Zhang Weixin was naturally overjoyed when he changed his car, and hurriedly drove to the front of the crowd.

"I, Cao, is this a joke? Everyone, where is City Lord Zhang?"

"Looking at the bulky appearance, it must be a guy who mines. I wonder if it is easy to operate?"

At this time, the mecha emits a burst of steam, the armor on its back opens automatically, and Zhang Wei jumps out.

Standing on the shoulders of the mecha, Zhang Wei introduced to everyone with a smile on his face: "I have always told everyone that I have a technology-side ability, but this was suddenly upgraded when I just went to the toilet. This is the new form of my armor. .”

"Yeah, I said it looked so extraordinary at first glance, but it turns out it is!"

"At first glance, this thing is a bit tame, but it does not lose the sense of majesty when you look closely!"

…………

After everyone flattered them, Zhang Wei said again: "Dahuang, are you sure that all the foreign races in the entire Celestial Dynasty have been searched for?"

"The heaven and the earth are vast. I really dare not say this. But I have traveled through a lot of territory, and I can find at least nine out of ten."

"I have an idea recently, I still need to trouble you to go."

Da Huang said generously: "Why do we need to divide each other up, just tell us if you have anything to do, don't forget that I am your citizen."

Zhang Wei made a worried expression, and said in a low tone: "Although we are now building Loyalty City, many alien races can live a good life. But when I think of the world, there are still so many intelligent races trapped in the wild, eating Bran swallowing vegetables, I feel bad in my heart!

I hope to build Zhongyi City into an international metropolis so that foreigners from all over the world can have a home.As the saying goes, there are tens of millions of mansions in Guangde, which can shelter the poor people all over the world and make them happy! "

What he said made the expressions of the foreign races present different. No one thought that Zhang Wei would be so attached to the foreign races!
Jin Lin cupped his hands and said: "City Lord Gao Yi made me feel ashamed! I, the Armored Race, also want to accept this time, so let us go through it for you!"

"Hey, what Brother Jinlin said is wrong. Our Wing Clan is better at this kind of running around. The advantage of having wings is not small. Am I right?"

Although the bats on the side didn't like birds, they still agreed: "That's right, my chiropteran can also go to various places for this!"

Zhang Wei continued: "Everyone has given you a big help. I, Zhang Wei, would like to thank you in advance. In order to commemorate the reunion of many races, why not hold a carnival to celebrate?"

"Carnival?"

Zhang Wei explained: "We humans will set some memorable days as festivals to commemorate and pour in. It is not easy for the eight alien races to count the nine races of human beings to reunite together, so naturally we must celebrate!"

"The city lord has the final say in this kind of matter. We can do whatever the city lord tells us to do! Are you right?"

"Yes, it is."

"Don't worry, the city lord, it will definitely be banned!"

All of a sudden, there was a cloud of booing, and seeing that everyone agreed so much, I thought there would be no problem with the carnival for the time being.

Because the chemical properties of uranium ore are very active, there is no free uranium metal in nature and it always exists in a chemical and chemical state.Before the disaster, the earth's uranium reserves were not low, about 2.5 parts per million, which was higher than gold, silver, mercury and the like.

There are currently about twenty or thirty kinds of uranium ores that are valuable for mining, and most of them have fluorescent characteristics.Whether it is used as nuclear fuel or nuclear weapons, there are extremely high requirements for the concentration of uranium. The associated elements of certain ores will hinder the progress of nuclear reactions.

At present, in addition to the underground ore mining equipment in Gushan, a water metallurgy workshop is being built on the ground.The uranium powder can be purified by hydrometallurgical purification, and the ore can be processed into ammonium diuranate, a chemical concentrate containing more than 60% uranium, and then further processed and refined until it becomes metallic uranium with a concentration of 99.9%.

Many alien races returned to the ground. In a laboratory, Zhang Wei showed a silver-white metal ball about the size of a fist.

"Look, everyone, this is the final product after purification, uranium metal! Those who are interested can go up and touch it."

All the alien races took a step back, everyone had a look of shock on their faces.It was as if the glass showcase in front of him was a poisonous snake and beast.

"City Lord, why are you leaving this thing here if it's so dangerous? Besides, isn't it radioactive?"

Zhang Wei smiled and said to everyone: "Everyone, don't be afraid. The half-life of uranium is hundreds of millions of years, and the radiation range is very narrow. It can't even penetrate the skin. It's very safe."

"You can touch it as you like?"

"Of course, uranium is easy to oxidize in the air, so it cannot be displayed for too long. In addition, uranium residues should not enter the digestive tract or respiratory tract, otherwise they will surely die."

Jin Lin shrank his hands in fright, shook his head and said: "Forget it, I don't dare to touch this thing, I'd better leave it here."

Zhuiyu also asked: "I have always heard that this thing is precious. I don't know how much ore it takes to produce such a big ball."

"Don't look at the small size of this ball, but the density of uranium is extremely high. This ball weighs about a dozen kilograms, and probably needs more than ten tons of ore."

"It takes more than ten tons of ore to extract more than ten kilograms of nuclear fuel. Tsk tsk tsk, it is indeed very precious."

Zhang Wei corrected with a slight smile: "Ms. Zhuiyu probably misunderstood, this is just metal uranium, not nuclear fuel."

Looking at the jade for a moment, Zhang Wei continued to explain: "The so-called nuclear fuel refers to uranium-235, and the content of uranium-235 in natural uranium is less than seven per thousand, which is the concentration of nuclear fuel we often talk about.

Taking the mecha I use as an example, the concentration of uranium-235 is about 22 parts per thousand, which is three times the concentration of natural uranium. It is also the lowest concentration requirement for nuclear fuel currently used by humans. "

Ms. Zhuiyu said softly, "What do you mean, this metal ball can't be used as fuel or weapon?"

"That's right, the minimum concentration of uranium-235 in human nuclear power plants is [-] per cent, and very complicated separation steps are required. Only the ultra-large nuclear fission battery produced by Academician Wang Naiyan has the lowest demand."

"Oh, so the Nanfu nuclear battery is not only small in size, but also not weak in energy supply, and the demand for raw materials is lower? Doesn't it mean that the traditional technology has been exploded in all aspects and can completely replace it?"

Zhang Wei said modestly: "Although the facts are true, traditional nuclear power plants are not without their merits. For example, the burned nuclear waste is more precious than nuclear raw materials?"

"Waste is more precious than raw material? Why is that?"

(End of this chapter)