In the early winter morning, the chirping of birds enters the bedroom, and sunlight enters the bedroom through the glass window. It wasn't until the sun was three poles up that Tang Haoran woke up from his sleep, he didn't have the habit of getting up late, but he tossed too much yesterday, and slept late at night, and slept until near noon.

He turned his head to see that Yun'er, whose hair was messy, had not woken up yet, her face was still red, and her expression was very beautiful and cute. Looking at that delicate face, Tang Haoran's lips couldn't help but lift, and the desire that had been suppressed for many days yesterday was finally released with her arrival.

When he came to North Korea to take office, Tang Haoran left Yun'er at home in the capital, and it was not until the situation in North Korea stabilized that Tang Shaoyi was instructed to take him to North Korea.

Later, after the situation stabilized, it was entangled by many things, and it was only now that all matters in the SAR were on the right track, which can be regarded as sending someone to take over the girl who stayed in the country.

Looking at Yun'er, who had not woken up, Tang Haoran couldn't help but muttered to himself.

"There's finally someone around me again!"

In the sigh, Yun'er turned over, when she opened her eyes, she yawned, and glanced at Tang Haoran by the way, her pretty face instantly turned red, thinking of last night's madness, she suddenly grabbed the quilt and covered her head, and wrapped the quilt all at once.

Tang Haoran, who was lying there naked, was suddenly a little overwhelmed. Then he listened to Yun'er say in the quilt.

"Young master, I don't have the face to see people......"

Yun'er's words made Tang Haoran stunned for a moment, and then thought of Yun'er's soul-crushing moans and groans last night. The sound could almost be heard outside the house. With a smug smile in his heart, he chuckled:

"Yun'er. Then the young master got up first? ”

"Ahh

Yun'er, who was originally stuffy in the quilt, remembered her identity and hurriedly lifted the quilt.

"Young master, I'll wait for you to get dressed."

Identity, for Yun'er, she will never forget her identity - just a little girl, and it is natural to wait for the young master.

Seeing Yun'er nervously start to put on her clothes, Tang Haoran shook his head helplessly. just looked at Yun'er there with a smile on his face, and was dressed......

After getting up, after having some breakfast, Tang Haoran went directly to the study and continued to start his previous research. Immerse yourself in what you are really good at - metallurgy.

Long before the silver for the iron factory was brought from Beiyang, after the silver in Hubei was deposited in the Bank of Korea. Tang Haoran instructed Tongguò to order two coke blast furnaces with a daily output of 25 tons, two 3-ton Thomas alkaline steelmaking converters, 12 mixing furnaces, machines for rolling steel plates, rails and iron bars, as well as other auxiliary processing equipment such as steam hammers.

Although the planned Incheon Iron and Steel Plant is small in scale, it is extremely well-equipped, and it is not just a steel smelting plant, but a complete steel enterprise engaged in steel processing.

However, for Tang Haoran, the 25-ton blast furnace obviously cannot meet his needs, and the reason why he did not set up a large steel plant is very simple - the cost, although it is a small steel factory equipment, also cost 73,154 pounds, of which 80% is steel processing equipment, if you add the infrastructure costs of the future steel plant, there is not nearly a million taels, and it is completely impossible to build a modern factory.

Now this factory has some problems in the eyes of foreign technicians - the annual output of steel is only 16,000 tons, but the steel processing capacity is more than 30,000 tons, which may not be incomprehensible to outsiders, but for Tang Haoran, who originally studied metallurgy, this is a normal thing, after getting the drawings of the blast furnace, he began to study how to transform the blast furnace to increase its production capacity.

“…… The height of the furnace is 15.24 meters, the diameter of the base is 1.83 meters, the diameter of the furnace belly is 4.88 meters, and the height of the base is 0.76 meters......"

After converting the imperial units on the drawing to the meter system, Tang Haoran once again studied the structure of the blast furnace in the 19th century, the top of the blast furnace has a bell-shaped top cover, which is the sealing cover, and the blast furnace gas is connected to a special gas pipe to guide four iron hot air and five parallel single-flame pipeline steam furnaces, while studying the structure of the iron-making blast furnace, Tang Haoran recalls the similarities and differences between it and the blast furnace of later generations.

There are not many differences in the main structure of the blast furnace, but there are great differences in the details, and it is the difference in these details that makes this most advanced iron-making blast furnace of this era undoubtedly a high-energy-consuming, high-pollution, and low-efficiency iron-making blast furnace in the eyes of later generations, and it is even far inferior to the "small blast furnace" of later generations.

"With a volume of 107.5 cubic meters, the daily output is only 50 tons, and the iron-coke ratio can be as high as 1:1.5......"

Yu sighed at the backwardness of the metallurgical level of this era, Tang Haoran began to calculate the production cost of this blast furnace, the cost of pig iron is determined by iron ore and coke, and according to the iron-coke ratio of up to 1 to 1.5, the cost of coke per ton of pig iron alone needs 13 taels of silver, and the standard of later generations, even if it consumes 0.5 tons of coke per ton of iron, it is considered "high energy consumption".

"Improve the utilization coefficient of the blast furnace, the current utilization coefficient of the blast furnace is only 0.4, well, we must first find a way to improve the oxygen enrichment rate, which has an obvious effect on strengthening the production of the blast furnace and improving the utilization coefficient."

Combined with the utilization coefficient of the small blast furnace in later generations, Tang Haoran immediately began to write down the transformation plan on paper, in addition to increasing the oxygen enrichment rate, it was also necessary to reduce the fuel ratio.

"Limestone ......"

Looking at the use of limestone as a flux in the smelting process, limestone per ton of iron is as high as one ton, the amount is large, and the coke ratio of iron smelting is strictly affected, Tang Haoran thought of the lime commonly used in later generations, the process of using lime as a flux can accelerate the smelting process of iron ore, and the amount of lime is much less than the amount of limestone, even by the standard of the 60s, it can be reduced to 100 kg. Not only can the amount of slag be greatly reduced. Moreover, it is very beneficial to increase iron and coke. It can significantly reduce the coke ratio and at the same time increase the amount of iron ore in the furnace.

Combined with the information on the transformation of the old blast furnace that later generations have seen, Tang Haoran quickly formulated a plan for the transformation of the blast furnace, as a metallurgical engineer, for steel smelting, he was originally very good, and even if it was not for the cryogenic oxygen production equipment and technology for appropriate industrial application at this time, it had not yet been invented. Tang Haoran even had the idea of transforming the two converters into top-blowing oxygen converters, and the reason why the alkaline converter was used, in addition to the low phosphorus and low sulfur characteristics of North Korean iron ore, the more important reason was that its output was large, and the equipment cost was low, and the production cost was lower than that of steelmaking open hearth.

"Any liquid substance has a certain boiling point, and the cryogenic method is to take advantage of this property of the substance, pressurize the air at low temperatures, and transform the air into a liquid state. Then evaporate. Since the boiling point of nitrogen is -196C, it is lower than liquid oxygen (-183C). Therefore, nitrogen first evaporates from liquid air, and the rest is mainly liquid oxygen. ”

Closing his eyes and thinking about the principle of the cryogenic oxygen production process, Tang Haoran found that he knew nothing about it, but he only knew its process principle, as for how to pressurize, how to convert the air into a liquid state, and how to evaporate, he had no clue at all.

"Don't think about this for now, you can leave it to someone else in the future......"

With his lips muttering, Tang Haoran refocused his attention on the metallurgical career he was good at, and said to Tang Haoran, who did not know that there were shipwreck treasures there, and did not have "golden thighs" such as space-time gates and aliens, but was trapped in insufficient funds, the only thing he could rely on was the metallurgy he had studied.

"Transfer of a new blast furnace process?"

Looking at the drawings of the preliminary "transformation", Tang Haoran immediately shook his head, in the future, he will have to rely on a ton of iron to cheapen a few taels of silver, compete with Western steel mills for the steel market in China and Asia, so as to rely on the profits of the steel industry to promote the development of other industries, and even in the planning of the special zone, steel will be its core.

What's more, in future wars, steel is also an indispensable and important strategic resource.

"What else can be sold for a good price?"

Fingers tapped on the table, Tang Haoran frowned, suddenly, his eyes lit up, he thought of a sentence he had read in a book, "Inventions related to war always store endless wealth", steel, isn't steel closely related to war?

Guns need steel, and warships need ...... Warship!

While those two words flashed into my mind, another word came to mind.

"Armor steel!"

In this era of the triumph of sea power, it is the beginning of the decades-long era of giant ship cannons, and the giant ship cannons of various countries have put forward higher requirements for ship-building steel, from the invention of Harvey nickel steel to carburized steel, all of which have developed rapidly under the impetus of giant ship cannonism.

"Krupp carburizing steel!"

Thinking of this word, Tang Haoran suddenly remembered this "legend" in steel, compared with Harvey nickel steel that has been invented for several years, the hardness of Krupp carburizing steel is higher, and as soon as it was invented, it quickly replaced Harvey nickel steel, which uses carburizing process to form a surface hardening layer, with better protective performance, so as to become the standard armor steel of warships in the era of giant ships and cannons, even if it is as arrogant as Britain, in order to maintain the balance of naval technology, it has to pay huge licensing fees and expensive patent fees, The introduction of Krupp carburizing steel, as for other countries is not the same, this qiē did not change until the outbreak of the First World War, and in the more than 20 years before the war, countries paid hundreds of millions of marks to Krupp for the patent fee of carburizing steel alone, so that during the Anglo-German naval competition, the British said that Britain needed to pay tens of thousands of pounds to Germany for every battleship built.

Now carburizing steel has not been invented, and even in the more than ten years after its invention, it is a "high-precision" technology, but in the 21st century, the steel carburizing process is also the "basic process" of the bad street, as a metallurgical engineer Tang Haoran is naturally not unfamiliar with this, the corners of his lips raised slightly, and his face was full of smugness.

"That's right, that's it......"

(Tears in pain...... I really cried, I was covered in sweat with so much pain, and every step I took felt like a knife cutting my knee...... Ask for a monthly pass, ask for comfort...... (To be continued......)