Copper smelter.

The bitumen after the coal tar has been purified immediately comes in handy.

After mixing a large amount of sand and gravel in the pure asphalt, a short section of the ground in the copper smelter is covered with asphalt.

Although there is no roller, there is Lao Lin which is a stonemason, and the problem of the press is directly solved.

After the asphalt was paved on the ground, a group of people pulled the stone mill several times, and the road from coke and copper ore to the copper smelting furnace in the copper smelter had a smooth asphalt floor.

The taste of the Jianzishan copper mine is not high, but the sulfur content is extremely high.

Therefore, at the time of Zhang Ran's poverty alleviation, this copper mine had been discovered for many years, but it had not been mined for the reason that sulfur was too polluting to the environment, and copper mining and smelting was a big problem for pollution control alone, so no one was willing to invest at all.

Zhang Ran organized the base to smelt copper, but more importantly, he valued the high sulfur content of this copper mine, which can use sulfur and other components in the exhaust gas to extract sulfuric acid, ammonia, etc. while smelting copper, which will naturally be regardless of the cost!

Because of this, in the general poor ore, before the ore is refined, it will be selected, and only the concentrate will be selected for refining, and the general waste ore will be directly discarded.

But here, there is no such thing as beneficiation at all.

Only when mining in the copper mines, as long as the copper ore is transported to the copper smelter, it is all ignored, and all of it will be sent to the furnace for refining.

The most important thing is to produce enough flue gas, extract enough sulfuric acid and ammonia......

Twenty or thirty women, who had been fixed to work in the copper smelter, were now crushing the copper ore and coke with small hammers, and then mixing the coke powder and copper ore powder in a certain proportion and loading them onto the chicken bus, and someone pushed the chicken bus directly to the copper smelting furnace.

The bearings of the chicken bus are still being developed, and it is estimated that there will be no progress for a while.

Therefore, the chicken cart, which is usually pushed and is relatively light, is extremely heavy and difficult to push after being filled with ore and coke mixed with mineral powder.

It's still a sunny day, and it's even worse if it's raining!

Fortunately, with these flat asphalt floors, the few people who push the chicken bus to feed can save a little effort, not to mention, and the work will not be delayed because of the muddy ground on rainy days.

Therefore, several people who are responsible for supplying the asphalt are full of praise, and every time they push the chicken bus to walk on the asphalt road, they are majestic, and they feel that they are a little superior.

Xu Jiunian commanded several apprentices to feed the materials, observing the fire and observing the fire.

With the combustion of coke, the impurities in the ore form billowing smoke, with the smoke exhaust port into a row of tower cylinders, with the temperature change of the tower cylinders, and gradually decompose into a variety of relatively pure flue gas, condensed in a certain cylinder room, discharged out of the cylinder body, into the prepared pottery tank.

Several men with big shoulders and round waists are desperately pulling the bellows to feed the blast, so that all kinds of gases can react and separate in each cylinder room.

The small engine is working suddenly, constantly driving the pumping machine to spray the cylinder filled with sulfur dioxide, so that the sulfur dioxide gas and liquid react to produce sulfuric acid.

At this time, the concentration of sulfuric acid produced is extremely low, about 10 to 20 percent.

"Absorb these dilute sulfuric acids with parent acid, and absorb them several times repeatedly, and the concentration of dilute sulfuric acid will increase very quickly!"

Zhang Ran and Deng Fang ran up and down to observe the reaction of the tower cylinder, and at the same time explained to Deng Fang, who was scratching his ears and cheeks because the concentration of sulfuric acid was so low.

Deng Fang reacted immediately, immediately added some mother acid to the cylinder, let the mother acid absorb dilute sulfuric acid at the bottom, and used the effect of the pumping machine to repeatedly circulate these dilute sulfuric acid in the cylinder, and repeatedly sprayed the flue gas!

The pungent smell began to spread in the air, and the skin began to feel hot!

Zhang Ran knew that the concentration of sulfuric acid in the cylinder had begun to increase rapidly!

"It seems that the method you said about using the repeated absorption of mother acid to quickly increase the concentration of sulfuric acid has worked!"

As soon as he saw Zhang Ran, Deng Fang, who had an old face, showed the joy of success on his face!

"Didn't everyone say I was a second sword? Why don't you talk about it now? ”

Zhang Ran looked at Deng Fang and said, "If it weren't for my two knives, how would we Deng Gong plan to solve the problem that the concentration of sulfuric acid could not be increased?" It is estimated that in the end, I will have to use a hard method, and directly evaporate to increase the concentration - if you rely on you to get concentrated sulfuric acid, tsk, I'm afraid that the daylilies will be cold......"

Deng Fang crooked his nose and stared at Zhang Ran stupidly, and only after a while did a sentence emerge from between his teeth: "I shouldn't have asked you - Lao Tzu doesn't believe in Lao Tzu himself, and he can't think of this method of repeated absorption!" ”

"Deng Gong, why are you pinching this - admit that although I am a second knife, I have an excellent vision on many issues, and I am much better than you as a professional, is it so difficult?"

Zhang Ran giggled strangely, although he scoffed at Kang Ting's previous schadenfreude behind his back, Zhang Ran had to admit that his mood was indeed very cool when he saw Deng Fang deflated.

"You are less proud, even if you know this method of repeatedly absorbing and rapidly increasing the concentration of sulfuric acid, but if it weren't for me, I don't believe you could see sulfuric acid so quickly!" Deng Fang would not be defeated so easily, and still sneered at Zhang Ran.

However, no matter how the two of them quarreled, they were very excited when they thought of the sulfuric acid that was accumulating in the tower tank.

The only regret is that the gas with a little sulfuric acid that is discharged from the tower cylinder with the exhaust gas at the end makes the two of them sneeze constantly, which is extremely uncomfortable, and the burning sensation on the skin greatly dilutes the joy of the two.

"It seems that we still can't just think about production, but also have to put a little effort into protection!"

Zhang Ran rubbed his hot nose and said: "We have only been here for a few hours, and we can't stand it anymore, and those ordinary people will work in this environment every day in the future, if they don't pay attention, in the long run, they will have to cause great damage to their bodies......

In this regard, Deng Fang did not pay attention to it at all.

People in this era have no understanding of all kinds of occupational diseases caused by the working environment.

Not to mention those capitalists, even the workers themselves will feel that since they have earned other people's wages, it is natural for them to suffer because of this.

In history, when the military industry department of the Eighth Route Army was preparing sulfuric acid, there were many grievances caused by the lack of understanding in this area, which made the ordinary people who enthusiastically supported the various work of the Eighth Route Army suffer a lot of grievances.

During that time, the men in all the base areas were not only responsible for food production, but also had to cooperate with the Eighth Route Army to carry out various anti-sweeping combat missions.

The women who work in the munitions factories are women.

The production tasks were heavy and the conditions were poor, and many of the women working in the sulfuric acid preparation department did not even have a change of clothes.

The smoke of sulfuric acid and nitric acid is very corrosive, so that these women's clothes are even more corroded and full of holes, and in the end they can't even cover their shame, because they don't have a change of clothes, they secretly hide in the house and cry.

As for the corrosion of the smoke, the women's hands and faces are peeled off a lot, and the respiratory diseases caused by inhalation of acid mist, etc., there are even more.

The reason for this situation is, on the one hand, of course, because the conditions are too difficult, and on the other hand, it is also because of the lack of protection and awareness of occupational diseases, not that the Eighth Route Army says one thing and does another, and does not care about the life and death of the common people for the sake of production.

Decades later, reports of occupational diseases such as pneumoconiosis and silicosis caused by the working environment were frequently reported, and even among Zhang Ran's poverty alleviation targets, one family was impoverished due to silicosis, and finally the family was ruined and died.

Therefore, Zhang Ran will never allow the same situation to happen in his own territory, and he decided at the first time that while pursuing production, he must let the people engaged in these jobs be prepared for protection and other measures!

Masks, gas masks, protective clothing, various oils for skin care, these things are ready immediately......

Masks and protective clothing are easy to say.

Masks are not a hard-to-get material, so Ke Langzi and Ren Haifang should be able to buy them if they find a way!

Gas masks sound very difficult to make, and it seems that it is obviously impossible to build them by making them yourself, given the current industrial level of the base areas.

But it's the easiest thing to solve!

Because there are them in the warehouses of the detachment!

The little devil is indeed arrogant, armed to the teeth!

There are many shells and bombs, and there are even poison gas bombs such as mustard gas, and even bacteriological bombs.

Relying on these poison gas bombs and bacteriological bombs, the little devils won many battles that our army should have won, and killed many brave and tenacious soldiers of our army.

While using these gas bombs and bacteriological bombs to harm people, the little devils are also preventing our army from using these things on them, so in addition to various equipment, gas masks are also necessary for every Japanese soldier.

Last time, two trucks of the little devils were blown up, and twenty or thirty soldiers were killed by a grenade, and among the things seized were gas masks.

If it weren't for Zhang Ran and Kang Ting's insistence, there were too many materials at that time to bring them at all, plus Wang Laogui and others, who didn't know the goods at all, it is estimated that these gas masks would have been thrown away early in the morning!

Originally, these masks were kept in order to deal with the poison gas warfare launched by the Japanese army in the future.

Zhang Ran didn't expect that the soldiers hadn't used it yet, but these ordinary people who worked in acid production would have to use it first......

Wearing these gas masks, Zhang Ran believes that at least in terms of respiratory diseases, these ordinary people can avoid some of them.

Of course, the gas mask may be useless after a long time, but fortunately, Zhang Ran has other ways to deal with it - disassemble the gas mask, add activated carbon to it, and use the adsorption power of the charcoal, even if the effect is not as good as the original gas mask, but at least it is much stronger than wearing a mask alone.

It's too late now, Zhang Ran decided to send out the gas mask early tomorrow morning, and the rest, such as protective clothing, gloves and the like, will be solved slowly later.

In addition to the gradual formation of sulfuric acid in the tower cylinder, with the process of copper smelting, there is also a liquid constantly discharged in the other cylinder, which is ammonia!

At the same time, raw materials mixed with mineral powder and coke are continuously injected into the copper smelting furnace, and the slag that has been refined is continuously discharged from the slag discharge port, and the scorching high temperature crude copper liquid has also begun to appear......