"Where's your house? Are there any losses? Zhang Yi also asked next to him.

"My family has no loss, my family does not have a pond, the main loss is the pond and paddy field, my paddy field is far away, there is no impact."

"This kind of thing doesn't matter to the relevant departments, every year the sulfuric acid plant doesn't know how much tax is paid, they can't wait for the sulfuric acid plant to do a good job, I go home mainly because I'm afraid that something will happen to my father, the whole village of young adults are dispatched, not to mention how spectacular the scene is, all of them block the entrance of the sulfuric acid plant layer after layer...... "Chen Tao continued with a smile on his eyebrows.

"Stop, don't go too far." Zhang Yi hurriedly waved his hand to stop Chen Tao from continuing the topic that had just deviated, this guy talked about this endlessly, "How did this matter be solved later?" ”

"Later? Later, people from the police station found the leaders of the sulfuric acid plant, and then asked a few people from the village to talk to them as representatives. Chen Tao thought for a moment and continued: "Listening to my father, after talking for a few hours, the sulfuric acid plant has promised to treat the sewage discharge immediately, and is also responsible for the treatment of the polluted nearby canals and farmland. ”

"So, did you say what to do with the sulfuric acid residue?" Zhang Yi asked a question that was important to him.

"Sulfuric acid slag, the sulfuric acid plant said that it should be transported away as soon as possible, and the amount of sulfuric acid slag piled up in the tailings dam should be limited to a certain range in the future, in this regard, it seems that the villagers have set up a special supervision team, and the sulfuric acid plant also wants to work here for a long time, and they still want to have a good relationship with the nearby villages." Although Chen Tao did not attend the morning meeting, he still heard a lot of news from his father.

Zhang Yi thought about it, sulfuric acid slag is a good thing, and it may be a burden to the sulfuric acid plant, but it is a lot of wealth if it is used well.

The sulfuric acid residue of the sulfuric acid plant is piled up, and it is not used, which is simply a catastrophe.

The main raw material for making sulfuric acid is pyrite, and the highest content of the remaining slag after making sulfuric acid is iron, which is even higher than the iron content of other freshly mined iron ore.

Why is it that slag with such a high iron content should be the best raw material for iron making in steel plants, but unfortunately it is piled up in tailings dams and becomes a burden for sulfuric acid plants?

This slag cannot be used, mainly because the sulfur content is too high.

In the process of ironmaking, if the sulfur in the slag enters the steel smelting process, it will cause hot brittleness of iron and steel, and the steel is prone to cracks during rolling and forging.

Sulfur can also form sulfur oxides with oxygen in steel, allowing hot brittleness to occur at lower sulfur content and temperatures. Various sulfide inclusions can also be formed in iron and steel, which, together with other non-metallic inclusions, have a detrimental effect on the mechanical properties of steel.

There are many such hazards, so the requirements for sulfuric acid slag in steel smelting are, first of all, that the sulfur content cannot exceed the standard.

In order to reduce its hazards, the amount of sulfur in steel must be reduced as much as possible, and theoretically there must be a mature desulphurization process, and this process must be low-cost and high-efficiency.

Zhang Yi is very aware of the current level of mining technology, 98 years of domestic sulfuric acid slag treatment technology is still a blank, although many scientific research institutions, large steel state-owned enterprises have invested a lot of money to develop this technology, but there is still no effective program.

China's national standard stipulates that the maximum allowable sulfur content in pig iron shall not exceed 0.07%, and enterprises often use 0.03% sulfur content of pig iron as a quality assessment index.

Although domestic scientific research institutions and research institutes have made continuous achievements in reducing the content of harmful impurities including sulfur, the overall average sulfur content is still about 0.18% after the desulfurization process.

The current situation is that the sulfuric acid plant does not have this technology, the steel plant does not have this technology, and other university scientific research units do not have it, but he Zhang Yi has it!

The price of high-quality iron ore in 98 is 242 yuan a ton, although it is difficult to compare with 600 yuan a ton in 2008, but for Zhang Yi, this price is simply sky-high.

The production scale of slightly larger sulfuric acid plants is hundreds of thousands of tons per year, and if the sulfuric acid slag produced by these outputs can be processed and then sold to the steel plant, the profit will also exceed 100 million yuan every year, and there will always be tens of millions of them.

Now sulfuric acid slag is a hot potato for sulfuric acid plants, sulfuric acid plants not only have to build tailings dams to stack sulfuric acid slag, in order to prevent tailings dam accidents, but also have to spend a lot of money to maintain it, which can be said to be more than worth the loss.

This sulfuric acid slag, no matter who wants it, the sulfuric acid plant is eager to pull it away overnight.

Earlier, Zhang Yi was still worried about how to make money, but now this opportunity suddenly appeared, almost just wanted to sleep, and someone brought him a pillow, which made him unhappy, and he could wake up with a smile when he dreamed.

Zhang Yi made up his mind in his heart that he must win this project.

However, Zhang Yi knew that it was not so easy to do this, first of all, he had to take down the sulfuric acid slag, and then he had to build a factory, buy equipment, put it into production, supply steel plants, etc., a series of things needed to be prepared.

But the most important thing is that Zhang Yi has to determine the technical plan first, and with the plan, coupled with economic analysis, he can devote himself to the subsequent work.

"Taozi, can you get a sample of sulfuric acid residue?" If you want to determine the plan, you have to do experiments, although Zhang Yi has this technology, he doesn't think that he is an immortal, he only needs to pinch his fingers and calculate to get it, so the test is necessary.

"What do you want this for?" Chen Tao said curiously.

"Then you don't care, you just say if you can get it." Zhang Yi waved his hand, obviously not wanting to say what he was doing with it.

"It's no problem, the tailings dam of the sulfuric acid plant is built next to our village, and the slag is piled up in a mountain, piece by piece, I'll get you some when I get home on the weekend." Chen Tao pouted, this scum usually doesn't want to give it away, it's easy to get a little.

"Okay, then you can help me get a little, just a few kilograms." Zhang Yi patted Chen Tao on the shoulder and said.

"Yes, no problem." Although he didn't know what Zhang Yi wanted this thing for, but thinking of something that could be done easily when he went home, Chen Tao agreed.

The four of them chatted casually for a few more words and went to do their own things, and there were classes in the afternoon, and while there was still half an hour, they all went back to bed to catch up on sleep.

......

The two classes in the afternoon were metallurgical principles, and as soon as the four of them stepped into the classroom, the squad leader Cao Xuefeng walked over to Zhang Yi.

Zhang Yi thought to himself that he wouldn't be so unlucky, he didn't go to class in the morning, and the incident happened in the east window?

Cao Xuefeng was holding a notebook with a list in his hand, and his expression was a little serious, "Zhang Yi, didn't you come to class in the morning?" I can't find you. ”

"Class leader, Zhang Yi overslept in the morning, and then simply skipped class, you have to educate him, he is getting more and more bold." Chen Tao "reported" Zhang Yi very unjustly next to him, and the other two turned a blind eye and simply looked for a seat.

"Fuck you." Zhang Yi kicked Chen Tao on the buttocks, but fortunately Chen Tao flashed quickly, and caught up with the boss and Li Guohua in a flash of smoke.

"Squad leader, this ...... I felt a little uncomfortable in the morning, so I lay down in the dormitory. Zhang Yi replied with some embarrassment. In 98, the academic style of the university was still very good, unlike later, it has become common for college students to skip classes, and there are not many people who listen to lectures.

Seeing Zhang Yi's lively appearance now, where does he look uncomfortable, Cao Xuefeng frowned, and said suspiciously: "Uncomfortable? Is it okay now? If you feel uncomfortable, remember to ask your roommate to take a leave of absence and go to the infirmary to see it? ”

"It's okay, it's a small problem, just lie down for a while." Zhang Yi snorted, it seems to be very normal now, but there was indeed a problem in the morning, he was reborn, can you believe it?

"Okay, it's okay, I'm not here to check on your skipping class." Cao Xuefeng flipped through the notebook in his hand and said: "That's the case, last month's application for a scientific and technological innovation project with your mentor has been approved, you are following Teacher Zhong Qiang, and you will report to his office at 10 o'clock tomorrow morning." ”

"Really? That's great. Zhang Yi didn't expect this unexpected surprise. In his previous life, he seemed to have entered the laboratory to study in his junior year, but he didn't understand anything at that time, and he should have gone to make soy sauce, so he was not impressed.

Generally speaking, professional professors do not bring many graduate students, usually one or two graduate students in one session, sometimes the project is very tight, and graduate students are simply too busy, so the supervisor will pick a few from the undergraduate students to work hard.

For undergraduates, this is also a rare opportunity to exercise, to be able to enter the laboratory in advance, to learn deeper things, even if after graduation do not continue to study in graduate school or engage in scientific research, this experience is also valuable, after all, do-it-yourself is still much more useful than what is learned in textbooks.

Due to the limited number of places and the large number of undergraduate students, many people are vying to enter the laboratory, so Zhang Yi is very happy to get a place.

He was not happy because he could go into the laboratory to exercise and learn things, he would have known what he wanted to learn a long time ago, and the professors were not as good as him.

What he cares about is that when he enters the laboratory, he can use the instruments and equipment of the laboratory to test the sulfuric acid residue, and the test plan can be determined.

The equipment of the laboratory is managed by the experimenter who is responsible for managing the laboratory, and the experimental instruments need to be specially registered before they can be used.

Now that I have a place, it would be great to be able to do experiments in the laboratory in the name of a teacher.

After Cao Xuefeng explained some precautions to Zhang Yi, it was time for class.