What about these things?

Now let your men build?

Three words, impossible!

Therefore, although it can not play a big role, but in general, the construction of the Dalinghe Bridge can also accumulate some experience, at least to ensure that the next time the bridge is repaired, the lowest mistakes will not be made: such as pile breaking, construction schedule, cross construction control, etc. Pen | fun | pavilion www. ｂｉｑｕｇｅ。 ｉｎｆｏ

The Daling River Bridge is not big, and in modern society, even the smallest contractor boss can complete it with a few people, however, Zhu Changyuan still mobilized all the architects, designers, prospectors, construction personnel, and even Lao Jiang on Riyue Island to come to observe and learn.

It's also one of the few opportunities to learn.

Even Zhu Changyuan himself went to the scene every day to study for a period of time.

However, the task on him was arduous, the courage on his shoulders was too heavy, and things were too busy to hang himself in one place.

He has one more thing to do: steelmaking!

According to the current construction schedule, in more than a month, in addition to the Daling River Bridge, the rest of the entire Fujin Railway can be installed with tracks.

But now, the steel mill has only just been commissioned, and not even a kilogram of steel has been produced.

From ancient times to the present, from backward to developed, the stages of steelmaking can be roughly divided into three types.

The first is the ancient steelmaking method, which the Chinese also call iron-smelting.

This method, to put it bluntly, is to collect iron ore from the mountain, put it in a special container, heat it with charcoal or coal, and when the temperature reaches 1,200 degrees, the iron becomes a semi-molten state, and after removing some magazines, you can get what the ancients called iron.

The ancients also called this kind of iron wrought iron. In fact, from the point of view of modern society, it is still pig iron.

Not only is it high in carbon. The impurities are also very high, and. It is very brittle, and if a knife and gun are made of this iron, the ductility is very low and it is easy to break.

Therefore, on the basis of this smelted iron, the sword of the ancient people should be repeatedly struck and beaten to remove most of the impurities. to turn it into iron with a slightly better texture.

This kind of iron, which has been repeatedly struck and hammered, can make a good weapon.

The second method of steelmaking is the soil method of steelmaking.

How to practice?

Very simply, after the iron ore is mined, it is heated in an earthen oven, and its temperature is of course much higher than in ancient times, and the iron ore is directly melted into molten iron containing impurities.

Because the impurities and iron have different melting points, they are separated from each other, so that most of the impurities can be removed. As a result, only iron is retained, and there are other impurities that are difficult to remove, such as manganese, phosphorus, sulfur, etc.

Of course. Phosphorus and sulfur are harmful impurities.

In general, the steel made by this method is better than the steel made by the first method in ancient times, however, it is generally difficult to meet the requirements.

For example, during the "******" period, China produced 20 million tons of steel a year, which was obtained by this kind of national local steelmaking, and the result was that a lot of resources and forests were wasted, and the steel was not up to standard.

The third method of steelmaking. That is, the steelmaking method of modern society.

First, the iron ore is crushed and melted. Gotta raw iron.

The pig iron is then refined for the second time to remove harmful impurities. And reduce the carbon content to less than 2%, and even add some unique beneficial elements such as manganese to increase the content, and finally make a variety of required steel.

This kind of steel is also the steel commonly used in modern society, such as steel bars, steel plates, steel for rails, etc.

Zhu Changyuan's steelmaking furnace is basically between the second and third types, and it is close to the third type.

That is to say, although he can make basically qualified steel, such as making a railroad track or something, it is absolutely enough, and it is basically enough to make construction steel, but I am afraid it will not work to make that kind of high-strength prestressed steel strand.

"Lord Wang!"

Speaking Chinese, which was not very proficient and could be said to be extremely stiff, Dennis said to Zhu Changyuan: "Everything is ready to go." ”

"Yes!"

Zhu Changyuan nodded, waved his hand, and ordered: "Begin, steelmaking!" ”

"Buzz!"

The machines are activated, and the loaders load the already crushed iron ore on a special conveyor, which is then transported into the steelmaking furnace and heated.

After this process, pig iron is produced.

Pig iron still contains a lot of carbon, so pig iron is very brittle in nature.

After the pig iron is processed and returned to the furnace, together with the burning coke, the carbon element in it is oxidized and reduced, and the harmful elements such as phosphorus and sulfur are also oxidized.

Eventually, a reddish molten iron is formed, which flows into a trench that has been prepared long ago, cools, and forms various shapes.

The formed rails that came out began to cool slowly according to the dimensions provided by Zhu Changyuan, and then they were delivered to him as soon as possible: a straight, thirty-meter-long I-shaped rail.

"Dangdang!"

Zhu Changyuan gently knocked on the I-beam with a hammer, and the sound was quite crisp.

From the outside, this I-beam does not look much different from the railway track in modern society, but Zhu Changyuan knows that there is still a quality difference in it, and it should not be small.

But what about that, Lao Tzu's rails only play a role in carrying loads, and do not transmit signals, as long as they are strong and malleable, and the trucks will not be brittle when pressed.

"Okay, that's it."

Zhu Changyuan pointed to the long steel rail in front of him and said: "Now we are going all out to produce this kind of rail, every thirty meters and a section, except for the connecting plate, don't produce anything else." ”

No other steel is needed now, and it is this kind of track that is urgently needed at the moment.

After all, after a month at most, the ballast on the entire Fujin railway can be paved, and the reinforced concrete sleepers below have been almost prefabricated.

Once these rails are produced, the mill can also produce a series of other steel products such as steel plates, steel pipes, steel bars and a series of other steel products in large quantities.

At the same time, it also means: The construction of the world's first steel mill was completed.

Although, this steel mill may not have produced as much output as a workshop in later generations.

But, so what. In addition to Lao Tzu's steel mill, I am afraid that the world will not be able to produce so many steel mills in a year.

Later, Britain entered the industrial leather after mingming. The annual steel production is only 10,000 tons, but in this way, they developed the world's first machinery industry, leading the progress of the whole of Europe and even the Americas.

The result?

It is with this annual steel output of more than 10,000 tons that it can dominate the world and plunder most of the colonies of the world, known as the "empire on which the sun never sets." ”

From this, we can see the rise of a country. The demand for steel is huge.

It can be said that no matter what kind of basic industry it is, it is inseparable from the premise of steel.

For example: machinery manufacturing, transportation industry, ocean navigation industry, military industry, shipbuilding industry.

How can you do it without steel?

Moreover, whether it is a building or any other structure, none of the real giants that look super big can leave the steel industry.

Just like later generations: high-rise buildings, aircraft carriers, large ships, trains, automobiles, even launch vehicles, space stations.

Steel is the foundation, not only the foundation of all industries, Zhu Changyuan even made such an assertion: in the future, the steel industry should be the foundation of the entire nation.

Now it is necessary to manufacture train tracks in large quantities. So I can't spare my energy for other research.

Once the rails are produced, he is ready for the steel mill to produce large quantities of steel for other industries, especially for the machinery industry.

That's the basics.

With machinery. You can let your subordinates start to study diesel engines, and you can let them research and develop generators, motors, and so on in comparison with their own small generators.

Moreover, if possible, Zhu Changyuan can also reveal to them some of the flight principles of the aircraft, and can tell them the knowledge in fluid mechanics in advance.

In other words, from the first steel produced by this steel mill on Sun Moon Island, the entire parallel world can be regarded as announcing the age of steel and the age of industry.

Think of the historical England and how they came to terms with a small island nation. Domination is all boundary, and their colonies are scattered across the east, west, north and south hemispheres. The flags of all the colonies are planted so that the sunlight can shine at all times.

It's also exciting to think about it.

"I'm going to be even better than they do!"

Zhu Changyuan shook his hand. For him, the foundation is good and the foundation is good. The most important thing is that Nima Laozi has a super plug-in in his hand, with this big killer, it is not as good as your little Britain?

"Dennis!"

Dennis, who was closest to him and watched streams of molten iron flow out of the blast furnace and then drill into the mold to become railroad tracks, woke up from the joy of great success, Zhu Changyuan continued: "You have done a good job, from today on, let's work together to change the world." ”

"From now on, I want you to build great ships out of steel, skyscrapers out of steel, and invincible ironclad chariots out of steel."

"Starting tomorrow, the steel plant will be handed over to the management of the big government, and you scientists, continue to develop other things, mainly machinery and generators."

"Yes, Lord Wang!"

Dennis' eyes were filled with excitement.

Since he came to Sun Moon Island, he has seen too many things that he has never seen before, and he has come into contact with infinite knowledge. Now, even if Zhu Changyuan doesn't give him any reward, he is willing to live on Sun Moon Island until he dies of old age.

For these science-obsessed people, knowledge is more important than anything else.

"Also, there will be a group of scientists from your side who will enter our Sun Moon Island one after another today, Dennis, there are more and more of your people."

Zhu Changyuan said with a smile.

"Yes, it's all your credit, my lord." Dennis wasted no time in patting Zhu Changyuan on the back.

"Do it." Zhu Changyuan squinted his eyes and said thoughtfully: "Follow this king, and follow the widow to create an unprecedented era of steel." (To be continued.) )