my scientific age

Chapter 271 Alkaline Converter!
During the period of the Republic of China, the college entrance examination was a bit similar to the registration of freshmen in later generations. It was the busiest two days in the whole university year.

From July [-]th to July [-]th, thousands of candidates from all over the country will come to Tsinghua University to participate in the university entrance examination. During this time period, when the old students have not returned home from the holiday, many students of our school will be arrested. Take advantage of this precious opportunity to help these out-of-town candidates who come to take the exam.

If the two sides have an eye on it, a story of a talented and beautiful woman will be staged.

however……

Yu Hua really has no intention of developing junior girls and tossing about these things that tend to be emotional.

"Okay, let's not talk about this, do you bring the drawings?" Professor Zhuang looked at Yu Hua without persuading him, smiled, and then started today's work.

Yesterday, the air separation plant assembly design was successfully completed, and today, it will enter the oxygen top-blown converter project.

"Bring it." Yu Hua nodded, took out more than [-] rolled up and preserved design drawings from the schoolbag he carried with him, and placed them all on the surface of the workbench.

These are the design drawings of the three-hole oxygen lance assembly and a series of structural design drawings, as well as the conceptual drawing of the oxygen top-blowing converter. For any industrial country in the world, this contains more than [-] design drawings of the technical data of the oxygen top-blowing converter. A priceless treasure.

"Professor, the last problem we face is here - converter structure and refractory materials, which are the main body of steelmaking. Do you think we should develop new converters and refractory materials, or use old converters first." Yu Hua opened Conceptual diagram of the oxygen top-blown converter, with the right index finger pointing at the converter, said.

Converter structure and refractory materials, this is the last technical issue of the whole project.

This question is difficult or not, and it is complex or not.

At present, there are two solutions, to develop new converters and refractory materials, and use the old converters to support them.

Zhuang Qianding's conceptual diagram of oxygen top-blowing converter in both eyes, with the light of wisdom in his eyes, he thought carefully for a moment, and gave constructive opinions from a theoretical point of view: "In terms of theoretical design, we already have an air separation plant and three-hole oxygen The gun objectively meets the conditions for continuous oxygen production and steelmaking oxygen delivery. The only thing missing is the steelmaking main body based on the converter structure and refractory materials. I think it can be based on the Thomas alkaline converter as the steelmaking main body. For converters, firstly, the technology is mature and the price is low, secondly, it saves time, and thirdly, the dephosphorization of molten iron can be completed through alkaline furnace lining and limestone, so the problem of high-phosphorus molten iron cannot be ignored, what do you think?”

Thomas basic converter, the converter structure design born in 1879, is currently the most advanced and mainstream steel-making converter design in the world. The earliest Besmer converter has been abandoned by the world's steel industry due to intolerable technical defects.

Zhuang Qianding's technical idea is very simple. It does not spend money and time to develop a new type of converter, and directly uses the Thomas basic converter as the main body of steelmaking to complete the last piece of the oxygen top-blown converter puzzle.

As the second-generation converter, the Thomas alkaline converter has advantages that cannot be ignored. The cost is only one third of that of the large-capacity open-hearth furnace. The technology is very mature, and there are no restrictions. It also solves the fatal defect of hot metal dephosphorization.

In fact, ignoring the inability to use scrap in large quantities, the Thomas Basic Converter is perfect.

"I agree with your idea. It takes too much time to develop new converters and refractory materials." Yu Hua nodded in agreement. He had intended to choose the second solution, using Thomas alkaline converter as the main body of steelmaking, and would develop new types in the future. converter.

You know, the first 2T-level experimental oxygen top-blown converter in history was developed and evolved based on the Thomas converter.

"Okay, then it's settled." Zhuang Qianding smiled with Yu Hua's support.

After the route is finalized, all that needs to be done is to come up with the specific converter structure.

This is no problem for Zhuang Qianding.

The whole person took a new design drawing, without any hesitation, he held the pen with his right hand, and was familiar with the drawing of a 2T-level Thomas converter.

The 2T-class Thomas converter sounds heavy, but it is only 7.85 cubic meters if it can be converted into volume according to the steel density of 0.254g/cm.

Considering that 20% of the safety redundant volume is reserved, the theoretical total volume of the converter molten pool is about 0.3 cubic meters.

What is the concept of 0.3 cubic meters?
Just a small pool.

With extremely rich practical experience and theoretical level, Professor Zhuang easily took out the main structure of the entire alkaline converter. The molten pool is 59 cm high and has a radius of 40 cm. The furnace lining is made of alkaline refractory materials and is composed of high-purity dolomite bricks. There is a layer of steel plate isolation in the middle, the second layer of insulation layer is filled with quartz sand, and finally wrapped with a layer of steel plate to form the furnace shell.

"The internal structure of the furnace body is roughly like this. You can see if there is any problem." After ten minutes, Professor Zhuang completed the internal structure design of the converter, dropped the pencil, picked up the water glass on the side, and said to Yu Hua.

When the words fell, the water cup was brought to his mouth and he took a sip.

This weather is really hot.

"No problem, there will be no melting of the furnace body, and the thermal efficiency is..." Yu Hua simulated and calculated according to the parameters marked on the design drawings, and after ten seconds, gave the engineering thermal calculation data.

"it is good."

Zhuang Qianding got the result, nodded, put down the water cup, and took out a design drawing again. This time, he mainly designed the external structure of the furnace body, trunnion, support ring, bearing seat and the most important tilting device.

The converter is located on the bearing seat, the bearing seat is connected with the tilting device, and the front and back are tilted at a large angle of 270° through the operation of the motor to complete the actions of molten iron injection and molten steel pouring.

The reason why the converter is called a converter is precisely because of this tilting device.

Time passed slowly, Yu Hua and Professor Zhuang cooperated highly tacitly, and the research and development efficiency of the 2T-class converter was terrifying.

Near noon, outside the mechanical engineering laboratory, the school gradually became lively. Today, the first exam in the morning of the recruitment exam is Chinese. More than 3000 students who came to take the exam are taking advantage of the tense and short time in Tsinghua campus to hurry up. Review and prepare for the math test in the afternoon.

According to the number of 294 students admitted last year, only one tenth of the more than 3000 people who came to take the exam could stay.

During the Republic of China, it was an extremely hard and difficult process to apply for the university entrance examination. Since the familiar national unified admissions examination had not yet appeared, in order to be admitted to a university, students must first complete the first university that held the admission examination, and then rush to the university after the examination is completed. to the next university.

Among the Peking area, Tsinghua University was the earliest, followed by Yan University and Peking University, followed by Nankai University, Beijing Normal University, etc. The list of the most popular universities among students was the re-opening of Qingbei, the four famous universities in the Republic of China in 1937. Of course, National Central University, which is super-first-tier, is not among them.

When the Southwest Associated University is established next year, the four famous universities in the Republic of China will become the National Central University, the Southwest Associated University, the National Zhejiang University and the National Wuhan University.

(End of this chapter)