my scientific age

Chapter 27

However, in the face of oxygen top-blown converter steelmaking, open hearth steelmaking, which is the king of steel production technology, is an instant obsolete product.

Oxygen top-blown converter steelmaking technology brings not only transcendence, but real change. This is the mainstream steelmaking method that has been adopted in later generations. The reason why Huaxia can become a world factory and then evolve into a world engine is inseparable from huge amounts of steel Yield.

The technology originated in 1948. Durerer, a professor at the Technical University of Berlin in Germany, built a 2.5T tar dolomite-lined test converter in the Swiss smelting laboratory. The water-cooled nozzle sprayed high-speed pure oxygen vertically downward to make high-quality molten steel. The laboratory test of converter oxygen-blowing steelmaking was declared a success.

At that time, the test results were astonishing. Oxygen made the smelting process heat up rapidly throughout the pure oxygen steelmaking process. It only took 10 minutes to successfully produce 2 tons of steel, and the production time and thermal efficiency were extremely high.

10 minutes, 2 tons!
What about open hearth steelmaking, which has been favored by countries all over the world?

The average smelting time is more than 8 hours. The average smelting time of the acid material steel-making furnace used at the beginning is as high as 24 hours, and the smelting time is extremely long.

Steelmaking is simply an oxidation smelting process. Air is the main source of oxygen in nature. However, four-fifths of the air is nitrogen. During the air smelting reaction, a large amount of nitrogen passes through the furnace, taking away a huge amount of heat in vain. And some nitrogen is dissolved in molten iron, which is an important reason for deteriorating the quality of low carbon steel.

After the oxygen in the open hearth steelmaking is used to burn the fuel, the excess oxygen is introduced into the molten steel through the slag layer, resulting in an extremely slow reaction rate.

Although hundreds of tons of molten steel can be smelted at one time, the time-consuming and energy-efficiency ratio is completely beaten by the oxygen top-blown converter steelmaking.

Compared with open hearth steelmaking, the advantages of oxygen top-blowing converter steelmaking are all-round, with more varieties, good quality, high resource utilization, and short production time. The capital construction investment is about 60% of the open hearth workshop with the same production volume.

The blowing process of the 50T oxygen top-blown converter is about 20 minutes, plus the time used for feeding and auxiliary procedures, no more than 40 minutes, the average number of smelting times a day is 36, the total daily steel output is as high as 65.7 tons, and the total annual steel output Up to [-] tons.

What does 65.7 tons mean?
1937年东北钢铁产量50万吨，日本年钢铁总产量580万吨，比例为1:1.314和1：8.828，是前者一倍多，后者11.3%。

Only 10 50T-class oxygen top-blown converters need to be built, and the total annual steel output can reach 657 million tons, reaching the Japanese level.

In a sense, the oxygen top-blown converter steelmaking technology is the real dragon slaying technique in this era, and the three sacred books are far less important than this technology.

As a well-known scholar at station B, Yu Hua knows well what this top steelmaking technology, which should have been born in 1949, means to China in this era. Since he is going to take the scientific road, this top technology belonging to the metallurgical industry is his one of the goals.

"To develop an oxygen blowing furnace, we need to overcome two core key technologies, one is oxygen lance, and the other is refractory material. This technology is something that I cannot study at this stage, and neither resources nor knowledge reserves support it. I will study it when I am admitted to Tsinghua University. Listed as the front and mid-term goals." Yu Hua thought in his heart, and the core of the oxygen blowing furnace technology emerged, and related arrangements were made.

Oxygen lances and refractory materials are the core of the oxygen blowing furnace. These two things need to involve various fields such as manufacturing, materials, and chemical industry, which Yu Hua cannot handle at this stage. Beiping No. [-] Middle School cannot provide laboratories and basic equipment for research. Only National Tsinghua University has such resources.

To be honest, Yu Hua's requirements are not high, 100T class, 50T class, these are too far away, even 10T class is an extravagant hope, as long as the 2T class laboratory-level oxygen top-blown converter can be produced.

A 2T-level oxygen blowing furnace takes about 30 minutes in total, the average number of smelting times a day can reach 48, and the daily output of steel at full load is 96 tons.

Don't look at the daily output of 96 tons, but the annual output is as high as 3.5. For China, whose annual steel output in 1937 was only 4 tons, this was an explosive output.

As long as there is a 2T-level scale, a 5T-level oxygen-blowing furnace, will a 10T-level oxygen-blowing furnace be far behind?

Now, there is no rush for the goal of developing an oxygen furnace and compiling the three sacred books, and the primary goal is still learning.

Only by mastering more knowledge is the kingly way!

At this time, Luo Wenguang nodded when he heard everyone's answers, glanced at Yu Hua, who had been sitting quietly and didn't speak, and gestured to the many students to calm down: "Yu Sheng, what is your ambition?"

The classroom was quiet, and everyone's eyes turned to Yu Hua.

Li Fan and Zhao Anyuan, who were sitting in the first row, looked at the only student in the class who didn't finish their homework.

"Mr. Hui, Hua wants to go to National Tsinghua University, study abroad in the United States, learn advanced technology, and serve the motherland." Yu Hua, whose name was read, recovered from his self-contemplation, stood up, and Yu Guang looked around and felt the eyes of his classmates. , be silent for a while, and express the aspirations of life.

As soon as these words came out, many students immediately frowned and cast a strange look.

In the midst of a national crisis, is it not escaping to stay in the United States instead of staying to reimburse the motherland?
Although there are still a small number of students who have gone abroad from Tsinghua and are unwilling to return to China these years, it is by no means absent!
Not to mention whether Yu Hua, who is ranked [-]th, can get into National Tsinghua University, at the juncture of the war, Yu Hua is going to study in the United States. This move is really hard to let go.

Some students showed disappointment in their eyes, and students with a strong temperament even showed contempt, labeling Yu Hua a coward in their hearts.

Mr. Ren Luo Wenguang did not criticize or disappoint. Looking at Yu Hua's bright and divine eyes, his face was serious, and he reminded earnestly: "Teaching the barbarians to control the barbarians, this is a way of saving the nation and survival that has lasted for more than [-] years. This way It is difficult, you have to be prepared in your heart, besides, your grades are far below the admission line of National Tsinghua University, so you need to work harder."

"Thank you for your teaching."

Yu Hua didn't care about the gazes of some students, he bowed his thanks, and spoke earnestly and sincerely.

What you do, you don't need others to understand, don't need others to care, and don't need others' approval.

"Those who established great things in ancient times not only have extraordinary talents, but also must have perseverance. Mr. Wang Er and others are as firm and strong as steel, and they will finally achieve their ambitions." Luo Wenguang's voice came out and echoed. in a huge classroom.

"As our respected teachers say, we must cherish time and work hard to learn."

The next moment, all the students stood up and answered neatly.

"All students should study by themselves, and gather at the school auditorium at [-]:[-]."

Leaving a sentence, the smiling Mr. Ren, Luo Wenguang, left. Today's school opening speech achieved its purpose and transferred the minds of all the students to the classroom.

The classroom returned to silence, and all the students sat down and studied individually.

"The set of wrong questions, the holiday homework, the three sacred books, I've been busy during this time." After sitting down, Yu Hua sighed in his heart, silently found the notebook, and prepared to do the holiday homework first, which will be submitted before [-]:[-] tomorrow morning. , must be prioritized.

(End of this chapter)