PS Thanks to Baili Yilou, Meng Xinbai Boss, Eyue Observer, and zjsyct for the reward of four children's shoes, summoning recommendation votes.

……

The building of the copper smelter has been simply erected.

According to Zhang Ran's instructions, it should be concealed and have enough space to be ready to expand production at any time when needed in the future, and the entire factory area has become a low-rise house built against the mountain.

The roof is not covered with magnificent green tiles like the detachment headquarters, but adopts the method of thatching and mud capping, which looks like it blends with the mountain from a distance, and if you are not familiar with the situation, you will not be able to see it until you get closer.

The core area of the copper smelter, where the copper smelting furnace is located, is built in a mountain col, which is more secluded than the factory area.

The factory area is busy, and there are sweaty people who come to weigh the copper mine at any time, and then leave with the bamboo chips that record the number of catties, and wait to find their respective village chiefs to settle the work after they go back.

"He's over there!"

Wang Changtian took Zhang Ran to the area where the copper smelting furnace was being built in the mountain col, and pointed to an old man in his fifties with gray hair, but the whole person looked extremely stocky, and said with a rather angry expression: "Xu Jiunian, I heard that he used to work in the copper smelter in Tianjin for many years, but Zhao Wanlin took some effort to invite him over - this old man, he has no consciousness at all, and he is dead to money!" ”

It is no wonder that Wang Changtian is dissatisfied, Xu Jiunian's monthly salary is enough for twenty oceans - the official eight roads of the detachment, in addition to the military salary, the cost is only forty or fifty oceans!

In other words, Xu Jiunian's two months' salary will be able to feed the existing fighters for a month!

"Secretary Wang, don't get angry, who made us not understand this aspect very well - one is willing to fight and the other is willing to suffer, it is difficult to find talents, there is no way!"

Zhang Ran comforted a few words, and then went to greet Xu Jiunian.

"Captain Zhang, I always hear the villagers praise you these days, I really can't imagine that Captain Zhang, you are still so young, you are really young and promising!"

Xu Jiunian said with a dry smile on his face: "Captain, you call me Lao Xu Cheng, if there is anything inappropriate, I hope Captain Zhang will bear with me!" ”

"Master Xu, you're polite!"

Zhang Ran said with a smile: "It's really hard to find a master like you who is familiar with the entire copper smelting process - in the future, our copper mine will rely on you, Master Xu!" ”

"I don't dare to say anything else, but if you want to talk about copper smelting, that captain Zhang, you can't be wrong if you put a hundred hearts!"

When it came to copper smelting, Xu Jiunian's expression was a little arrogant, and he pointed to the copper smelting furnace that those masons were building and said: "Don't dare to say anything else, just say that the furnace built according to my method, we can't find a few furnaces in China that are more efficient than this!" ”

In these years, those who have a little bit of craftsmanship love to put gold on their faces like this?

Zhang Ranxin said, after all, when the stonemason Lao Zheng chiseled the oil trough before, what he said was exactly the same as this Xu Jiunian.

There are several ways to smelt copper, which can be roughly divided into wet copper smelting and fire copper smelting.

Hydrocopper smelting uses chemical solvents to replace the copper in the copper ore, while pyrometallurgical copper smelting uses high temperature to smelt the copper in the copper ore.

The copper ore in Jianzishan has a low copper content and low grade, so it is said that it is more suitable for wet copper smelting.

But in these years, Zhang Ran has nowhere to find those chemical solvents, let alone sulfuric acid, the main solvent for wet copper smelting, which is the fundamental reason why he opened this copper smelter, and it is even higher than his demand for copper!

Xu Jiunian led Zhang Xing to visit the copper smelting furnace under construction, and explained to him where the fire is the mouth, where the material is fed, where the slag is produced, and where the blister copper flows out.

It has to be said that although the structure of this copper smelting furnace is slag dropped, the operation is quite scientific, and once the copper smelting begins, it can run continuously day and night.

Initially, this was Zhang Xing's biggest concern.

If it is like an earth blast furnace, it can only be refined once, and after the refining is completed, it will be troublesome to wait for the copper furnace to cool down, produce copper, and then feed the material to continue refining.

It's one thing to be inefficient in refining, the point is that his main purpose is to collect the exhaust gas from copper smelting, which is used to make sulfuric acid and ammonia, etc.!

If you have to start all over again before you have collected much of the gas you need, it will be a big problem!

Therefore, after listening to Xu Jiunian's explanation of the operation of the copper smelting furnace, the feeling of pain in the heart of this guy's lion opening his mouth to ask for twenty yuan a month's salary was much better.

"Then how long will it take for our copper smelting furnace to be opened for refining?" Zhang Ran finally asked.

"After the furnace is built, it has to be dried first, if the water vapor is not dried, it is easy to fry the furnace, and you have to test it once when it is finished......

Xu Jiunian folded his fingers and calculated: "If everything goes well, after a month, you should be able to continue smelting copper!" ”

"Then there is Master Lao Xu!"

Zhang Ran said: "Time waits for no one, and the little devil won't give us too much time, and I hope Master Xu, you will hurry up some time!" ”

"Don't worry, Captain Zhang, I took your salary, and I will definitely do my job!"

Hearing Zhang Ran's words, Xu Jiunian was obviously a little unhappy and said: "But Captain Zhang, you guys, prepare more coke or something—you won't let me use firewood or something to smelt copper, right?" ”

Zhang Ran hurriedly smiled and agreed, but he was quite annoyed in his heart, and said that your surname is Xu, Lao Tzu gave you so much salary, why can't you rush you, why do you still throw face at Lao Tzu?

"Secretary Wang, you are looking for a few young men with high consciousness and clever enough to follow Xu Jiunian to learn copper smelting!"

On the way back, Zhang Ran, who was full of unhappiness, told Wang Changtian to make arrangements, and said that as long as the people he arranged learned the various crafts of copper smelting, he would open the surname Xu as soon as possible - to give you such a high salary, why do you still kick your nose in the face?

If Lao Tzu's Jindong detachment really begs you to do something, you can be an uncle?

Lao Tzu, this is a revolutionary team, and it should have been a place of dedication and sacrifice!

You are not honest when you give you money, you have to force Lao Tzu to make evil moves!

After such a circle, Zhang Ran couldn't hold it anymore, so he let the kitchen put a bowl of noodles on his stomach, and as soon as he fell into bed, he fell asleep.

By the time he opened his eyes again, it was already midday the next day.

"Team Zhang, wake up, look at what tired you!"

Seeing Zhang Ran get up to wash, the aunt in the kitchen looked distressed, and as soon as Zhang Ran finished washing, she brought the gruel that had already been cooled to cushion his stomach.

Not far from the next door, there was the sound of Deng Ying teaching and the sound of the children reading aloud, mixed with the sound of Shi Yuan, Wang Kai and others training.

Drinking porridge with these voices, Zhang Ran sincerely felt satisfied - this base created by himself is thriving day by day!

It wasn't long before the copper mines started to smelt copper, sulfuric acid was produced, fertilizer was produced, and the machines in the caves were running......

At that time, all kinds of weapons and ammunition will be produced in a steady stream, and grain will be piled up because of the increase in the production of chemical fertilizers......

Its own Jindong base area will provide the most adequate guarantee for all the soldiers who insist on fighting the little devils behind enemy lines to the end!

Thinking of the little devils who used the grenade mines and explosives made by the soldiers in their Jindong base area to cry and call their mothers, and thinking of the guns made by the detachment, they sent a little devil to see the king of Hades with one shot......

Zhang Ran couldn't help but laugh out loud!

"Captain Zhang, what are you daydreaming about in this daylight?"

Wearing a straw hat that he didn't know where to get, Deng Fang, who came in with hot sweat on his forehead, interrupted Zhang Ran's reverie.

"What a daydream!"

Zhang Ran said happily: "Uncle Deng, what do you say should be called for the guns and ammunition that we will make here in the future?" Jindong card doesn't feel good, what do you think of Zhang Ran's card? ”

"You haven't even scratched the eight characters, what are you thinking about that thing for?"

Deng Fang asked with a big roll of his eyes.

"Brand!"

Zhang Ran said in a snort: "Let's make an analogy, for example, the weapon made by our base is called Zhang Ran's card - whoever uses the grenade we made to kill a devil in the future, then don't think of me Zhang Ran?" If anyone uses the gun we made to beat the devil accurately, then he also has to think of me Zhang Ran, and then praise when he sees people - oops, Zhang Ran cowhide, it's amazing, leveraged ......"

Burst......

The water in Deng Fang's mouth, who was drinking water, came out of his nostrils and sprayed Zhang Ran's face!

“……”

Zhang Ran was depressed, stared at Deng Fang and said, "Uncle Deng, you don't like to listen to what I say, don't listen to it, it's over, do you need to spray my snot and saliva?" ”

"If you really want to make a brand for something you make, I think it's still called Jindong card, don't put your own name on your head!"

Deng Fang, who looked uncomfortable, coughed and said: "If you really beat the little devil, people still think that you Zhang Ran ran ran away alone-you don't have a face, the villagers in this base always have to have a face, don't you?" You have to think about the folks! ”

“……”

Zhang Ran suddenly became a little excited and asked, "You just came here, don't you have a good rest, why did you sweat?" ”

"Let the old kidnapper take me around the copper smelter!"

Deng Fangzheng said with a straight expression: "I checked your copper mine, there are too many impurities, and using that ore to smelt copper, I'm afraid that the copper smelted is not enough for the cost - but there are many impurities and benefits, such as the ...... you said about refining sulfuric acid, ammonia, or something."

The depression on Zhang Ran's face was suddenly swept away, and he said happily: "Uncle Deng, what do you mean, are you willing to follow us and contribute to the fight against the Japanese invaders?" Didn't you use words to stabilize me, but actually secretly probed and prepared to sneak away, right? ”

“…… I want to run, but my daughter is not happy! ”

Deng Fang's old face flushed, and he resolutely refused to admit that he wanted to stay, and snorted: "I have asked Xu Jiunian to install a flue to collect exhaust gas on the copper smelting furnace, as well as a cylinder chamber to separate the flue gas, but you have to figure out how to do it yourself......"

"Wrap me up!"

Zhang Ran laughed and was full of spirits.

Deng Fang squinted at Zhang Ran, very unaccustomed to his villain's ambition, and said, "So confident? Tell me about it! ”

"We'll talk about it then!"

Zhang Ran bought a pass, but on the surface, his eyebrows were still dancing.

………… Dividing line ............

Ask jibing1224 classmates the problem of sulfuric acid from burning in the lead chamber of electrolytic gas - the gas burns in the lead chamber and does not react with the lead chamber, right? What kind of media do you need?

Saury chemistry blind, please jibing1224, or any students who know to answer the saury, thank you very much!