The coke has been smelted, and now it is being turned off to cool down.

The coal tar collected is black and sticky, with two large clay jars, and it is estimated that the subordinates are 200 catties.

Deng Fang asked Niu Da to cast a super large iron pot, and was preparing to use the distillation method to refine the coal tar.

Coal tar is of little use to the detachment at the moment, what the detachment needs is something after refining.

Coal tar is distilled and decomposed, and finally light oil, light oil, phenol oil, washing oil, asphalt and naphthalene, benzene are formed.

Among them, except for the phenol oil, which is not of great use at present, everything else is a treasure for the detachment!

The detachment now has two car engines and a small engine, both of which burn diesel, and now it is all supported by the little diesel fuel that Zhang Ran and the two trucks they collected from the mailbox last time, and now they are all waiting to be fed.

The light oil can be used directly as diesel, which can greatly alleviate the fuel problem of the diesel engine, if it is paired with buying a little diesel from outside or robbing a little diesel every once in a while, then there is no need for Zhang Ran to make a big move for the time being, so that the villagers in the base area can go up the mountain every day to cut the roots of the tree and boil the root oil.

Asphalt can be used to pave roads, to level the ground in fertilizer plants, copper smelters and coking plants, so that these plants can avoid muddy conditions in windy and rainy weather, which can affect work efficiency.

As for naphthalene, it goes without saying.

When sulfuric acid comes out to prepare nitric acid, these two things can be synthesized into picric acid, which is a high explosive!

Although it is possible to prepare more stable and safe nitrifying explosives with sulfuric acid and nitric acid, behind this enemy, what kind of explosives are in short supply, no matter how much is not enough, as long as it is a high explosive, the more the better, no one will dislike the fact that picric acid is toxic and not safe enough!

The role of washing oil is not very familiar to the average person.

But washing oil actually has great use, of course, this has to start from its characteristics - it can blend with many compounds in coal tar and absorb!

With washing oil, adding some washing oil to the next coal tar collection or even the flue gas treatment at the copper refinery can absorb more phenylnaphthalene and other compounds that should be spilled into the air, which can not only increase the amount of these chemicals collected, but also reduce the harm of these compounds to the air and the surrounding environment.

It can be described as a multi-functional player in compounds!

Zhang Ran now looked at the coal tar in the two large clay jars, and his expression was very dissatisfied.

Tens of thousands of catties of coal coking have collected such a little coal tar, and it is strange that he can be satisfied!

There is less coal tar, of course there is less light oil, and there are fewer chemicals that can synthesize picric acid, such as phenylnaphthalene, and the result is that there is less fuel and explosives......

"Deng Gong, I think your technology level of coal tar collection still needs to be improved......

Zhang Ran spoke earnestly, ready to teach Deng Fang earnestly, and at the same time vaguely expressed his dissatisfaction with the small amount of coal tar, urging Deng Fang to go further on the road to the peak of science and technology.

"You're content, you—get out of the way, don't bother me!"

Without waiting for Zhang Ran to finish speaking, Deng Fang scolded angrily, and asked him to get out of here with an expression of a professional doing things, don't mix it blindly here.

Zhang Ran got up stupidly, and he couldn't say anything about the MMP in his stomach.

It's despised!

If you knew that you would wear it back, Lao Tzu also specialized in chemistry when he was in school - he was a dignified traveler, and he was actually despised by a native, is this like this?

The depressed Zhang Ran went to the back mountain,. T extracts the progress.

. T is a safety explosive, even if it encounters an open flame, it is not easy to explode directly, but for the sake of safety, Zhang Ran still asked a few people to take the medicine by steaming it through water.

After all, this is a shell workshop, and there may be various explosives suspended in the air. Just because T won't fry doesn't mean other ingredients won't be fried, right?

There's nothing wrong with being careful.

Mao Zuan and others resolutely implemented Zhang Ran's opinion, kept the steamer far away, and let the kiln factory burn a batch of pottery pipes to seal and bury them in the ground, and introduced high-temperature steam into a workshop for dry steaming and medicine.

The effect is very good, in the past, a few people could not take out much medicine from the shells in a day and were still frightened, but now as long as the lead is removed and thrown into the steamer, the explosives will not turn into water, just pour it out and dry.

Seeing Mao Diamond, Zhang Ran was a little embarrassed - after all, he wanted to show his hand to Mao Diamond before, but he dragged people to squat by the river for half an afternoon.

Fortunately, Mao Diamond is not Deng Fang, not only did he not despise Zhang Ran is second knife because of this, but he praised Zhang Ran's method of dry steaming and extracting medicine, and he almost blew it into a miraculous skill.

Zhang Ran, who had a gray nose in front of Deng, was slapped by this sycophant, and he was suddenly full of vitality again.

Considering that the sulfuric acid has almost begun to be prepared, and if everything goes well, the detachment will prepare pure sulfuric acid in more than half a year, and it will gradually have the ability to produce nitrification explosives, Zhang Ran decided to let Mao Zuan and others experiment to see if they can use this batch of grenades to fight against the Cangshui detachment, in addition to black powder. T explosives to increase the power of the grenade.

In fact, in the past two months, Mao Drill has been busy learning to defuse the lead in the bomb. In addition to the removal of T explosives, the process of making self-made grenades and mines was improved, and that was not delayed.

Compared with the first batch of grenades that can only explode eleven explosives, and the power range is only seven or eight meters, the grenades that have been successfully tested now can explode seventeen or eighteen explosives at a time even if they are all black powder, but the power range has not been greatly improved.

However, the power of mines has not been greatly improved, after all, mines are buried in the ground, which tests the power of explosives even more, and the power of black powder is obviously insufficient.

"Actually, Minister Mao has long wanted to add these good medicines to grenades and mines to try their power, but aren't you worried that you will have to use these medicines to reload bullets in the future, we are not embarrassed to mention it to you, captain, ......"

Hearing Zhang Ran's request, several apprentices jumped excitedly, and Mao Diamond was also smiling.

In the previous battles, the soldiers had paid attention to the power of grenades and mines, and they had also reacted to Mao Diamond when they came back.

Every time I hear that those devils and puppet soldiers stepped on a mine, they were only slightly injured and even covered in black, and they didn't delay them to continue to find everyone's trouble, and heard that those grenades could kill a few more devils and traitors because of their power, but they couldn't be killed because of their power, but they just injured those devils and traitors, Mao Zuan didn't know how awkward it was.

Now, Zhang Ran explained that he could add a little good medicine to it to increase the power of the grenade mine, how could he be unhappy?

He simply wished that all the grenade mines were loaded with good medicine and blew up the devils, traitors, and all the enemies who dared to fight against the detachment and the Eighth Route Army!

"Rest assured, what you hope for, there will be a chance to come true!"

Zhang Ran patted Mao Zhuan's shoulder, and laughed proudly: "Deng Gong has extracted a lot of coal tar from the coking plant, and now it is being purified, in addition to the light oil that can be used as diesel, there are also chemicals such as phenylnaphthalene that can be extracted from it to make picric acid, a high explosive, and so on, when the copper smelter is launched, we can also prepare sulfuric acid, and we can also make nitrification explosives ourselves. Those little devils who have to blow up the special code cry dad and call their mother......"

"Yes, yes, those little devils and traitors who blew up on the dog day cried and called their mother, and sent them back to their hometown, hahaha......"

Hearing Zhang Ran's words, Mao Zuan and several apprentices laughed happily, looking forward to this day coming sooner.

Arrange it in a workshop, enjoy the touting of Mao Diamond and others, and have touched a nose of gray depression in front of Deng Fang, which has long been blown to the clouds, and excitedly gathered Niu Dacheng Dongguo Xiao Sanyuan together and held a meeting.

There is only one purpose, that is, to prepare for the research and development of bearings, to be used in chicken buses, to reduce the friction between the wheels and axles of chicken buses, to make chicken buses easier and faster, and to reduce the loss of chicken axles.

Zhang Ran slapped the sketch he had drawn in front of the three of them, and let the three of them understand it first.

"Captain, what the hell is this drawing?"

The three of them stared at each other for a long time, and finally Niu Da said a little embarrassed: "We really don't understand the artwork - is this the legendary abstract painting?" ”

I'm Nima......

Zhang Ran almost fell to the ground, and said in his heart that although he really had no talent for painting, how could the mechanical design drawn by Lao Tzu have nothing to do with abstraction, right?

"Master Niu, you can, the level is rising, even the abstract faction knows!"

Zhang Ran looked at Cheng Dongguo, Cui Sanyuan and Niu Da who were holding back their laughter, knowing that they were deliberately teasing themselves, and snorted twice before he began to carefully explain the role and benefits of bearings to the three of them, and finally the technical problems.

Bearings appeared very early, but it has been a long, long time before high-quality bearings have been manufactured in China.

Even in the early days after the reform and opening up, the domestic manufacturing of bearings is still very poor, and the bearings used in some important equipment have to rely on imports to solve.

It can be seen that the bearing thing looks simple, but in fact, it is definitely not an easy thing to create a bearing that is easy to use and reliable in quality.

There are several key factors that make a good quality bearing!

One is steel of good enough quality, the second is seamless steel ring, and the third is steel ball!

The absolute circle of the steel ball is the top priority to determine the quality and life of the bearing!