The university recruitment examination during the Republic of China was somewhat similar to the registration of freshmen in later universities. It was the busiest two days of the year in the entire university.
From July 7th to July 8th, thousands of candidates from all over the country will come to Tsinghua University to take the college entrance examination. During this time, the old students have not gone home for the holidays, so many students from our school will catch them. Take advantage of this precious opportunity to help these foreign candidates who come to take the exam.
If both parties fall in love, a story about a talented man and a beautiful woman will unfold.
However……
Yu Hua really didn't have the heart to develop a school girl and deal with such emotional matters.
"Okay, let's not talk about this. Have you brought the drawings?" Professor Zhuang looked at Yu Hua and didn't try to persuade him. He smiled and immediately started today's work.
Yesterday, the air separation equipment assembly design was successfully completed. Today, we will enter the oxygen top-blown converter project.
"Bring it." Yu Hua nodded, took out more than twenty rolled-up design drawings from the schoolbag he carried with him, and placed them all on the surface of the workbench.
These are three-hole oxygen lance assembly design drawings and a series of structural design drawings, as well as oxygen top-blown converter concept drawings. For any industrial country in the world, these include more than twenty design drawings containing oxygen top-blown converter technical information. It is a priceless treasure.
"Professor, the last problem we face is here - the 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 the old converter first." Yu Hua opened the book Concept diagram of oxygen top-blown converter, pointing the index finger of his right hand at the converter, and said.
Converter structure and refractory materials, this is the last technical issue of the entire project.
Is this question difficult or complicated?
There are currently two solutions: develop new converters and refractory materials, and use old converters to support them.
Zhuang Qianding had a conceptual diagram of a double-eyed oxygen top-blown converter, with a gleam of wisdom in his eyes. He thought carefully for a moment and gave constructive suggestions from a theoretical perspective: "From a theoretical design perspective, we already have air separation equipment and three-hole oxygen Gun, objectively meets the conditions for continuous oxygen production and oxygen supply for steelmaking. The only thing missing is the main body of steelmaking based on the converter structure and refractory materials. I think the Thomas alkaline converter can be used as the main body of steelmaking, and no new type will be developed for the time being. Converter, firstly, has mature technology and low price, secondly, it saves time, and thirdly, it can dephosphorize molten iron through alkaline furnace lining and limestone. The problem of high-phosphorus molten iron cannot be ignored, what do you think?"
The Thomas alkaline converter, a converter structural design born in 1879, is currently the most advanced and mainstream steelmaking 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. Instead of spending money and time on developing a new converter for the time being, he directly uses the Thomas alkaline converter as the main body of steelmaking to complete the last piece of the oxygen top-blown converter puzzle.
As a second-generation converter, the advantages of the Thomas alkaline converter cannot be ignored. The cost is only one-third of that of a large-capacity open-hearth furnace. The technology is very mature and there are no restrictions. It also solves the fatal flaw of dephosphorization of molten iron.
In fact, the Thomas Basic Converter is almost perfect if you ignore the disadvantage of not being able to use large quantities of scrap steel.
"I agree with your idea. It takes too much time to develop new converters and refractory materials." Yu Hua nodded in agreement. He had originally intended to choose the second solution, using the Thomas alkaline converter as the main body of steelmaking and developing new models in the future. converter.
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You should know that the first 2T experimental oxygen top-blown converter in history was developed and evolved based on the Thomas converter.
"Okay, then it's settled." Zhuang Qianding received Yu Hua's support and smiled on his face.
After the route is finalized, all that needs to be done is to come up with the specific converter structure.
This point is no problem for Zhuang Qianding.
He took a brand new design drawing and without any hesitation, he held the pen in his right hand and drew the drawing of the 2T Thomas converter with ease.
The 2T Thomas converter sounds very heavy, but when converted into volume based on the steel density of 7.85g/cm3, it is only 0.254 cubic meters.
Taking into account the 20% safety redundancy volume, the theoretical total volume of the converter melt 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 it is wrapped with a layer of steel plate to form the furnace shell.
"The internal structure of the furnace is roughly like this. See if there are any problems." After more than ten minutes, Professor Zhuang completed the design of the internal structure of the converter, dropped his pencil, picked up the water glass placed aside, and said to Yu Hua.
After finishing his words, he brought the water glass to his mouth and took a sip.
This weather is really hot.
"No problem, the furnace body will not melt. The thermal efficiency is..." Yu Hua performed simulation calculations based on the parameters marked on the design drawings. After ten seconds, the engineering thermal calculation data was given.
"good."
Zhuang Qianding received the result, nodded, put down the water glass, and took out a design drawing again. This time he mainly designed the external structure of the furnace body, the trunnion, the supporting ring, the bearing seat and the most important tilting device.
The converter is located on the bearing seat, and the bearing seat is connected to the tilting device. Through the operation of the motor, it can tilt at a large angle of 270° in the forward and reverse directions, completing the actions of injecting molten iron and pouring out molten steel.
The converter is called a converter precisely because of this tilting device.
Time passed slowly, and Yu Hua and Professor Zhuang cooperated with each other in a tacit understanding. The research and development efficiency of the 2T converter was frighteningly high.
As noon approaches, outside the Mechanical Engineering Laboratory, the school gradually becomes lively. The first subject in the recruitment morning today is Chinese. More than 3,000 students who came to take the exam are taking advantage of the tense and short time in various parts of Tsinghua Campus. Intensify your review and prepare for the math test in the afternoon.
According to last year's admission number of 294 people, only one-tenth of the more than 3,000 people who came to take the exam could stay.
Applying for college during the Republic of China was an extremely arduous and difficult process. Since the familiar national unified admissions examination had not yet appeared, in order to be admitted to college, students had to first complete the first university that held the admissions examination. After the examination was completed, they could rush forward without stopping. Go to the next university.
Among the Beiping areas, Tsinghua University is the earliest, followed by Yan University and Peking University, followed by Nankai University, Beijing Normal University, etc. The most popular university list among students is Qingbei Fukai, one of the four famous universities in the Republic of China in 1937. Of course, the top-tier National Central University is not among them.
When Southwest Associated University is established next year, the four famous universities in the Republic of China will become National Central University, Southwest Associated University, National Zhejiang University and National Wuhan University.
