Waiting for the sunspot to come back at night, before Tang Yi could speak, the sunspot spoke first. Pen & Fun & Pavilion www.biquge.info

"Da Lang, tell you something."

"What's the matter? Tell me which one you want to marry! ”

Old Kuroko's face turned red, "What are you talking about?" I don't have that mind! ”

"So what are you going to say?"

Heizi scratched his head, "At the end of the month, Miss Xiqin picked up an envoy who went to perform in Tianfu. This time and back for hundreds of miles, a group of girls from their family is not uneasy......

"So, you want to be a bodyguard and escort the whole process?" Tang Yi rolled his eyes, defeated by this fool.

Still biting and not having that mind, the ghost believes you?

Kuroko smiled thoughtlessly, "Then I'll agree to it as a big man." ”

"No, can you do it?" Tang Yi shouted with hatred that iron is not made of steel.

"It's all like this, and you're too embarrassed to say it? Hurry up, who is in the picture? The bride price we sent over is guaranteed to let the ladies of the Peach Blossom Nunnery eat for a lifetime, so you don't have to give them the same person. “

Kurozi's cheeks were like soldering irons, and he said crampedly: "I'll talk about it when I come back!" Come back! After saying that, he ran away as if he were running.

Tang Yi didn't have a trick with him, and it just so happened that he had a lot of things to do at this time, so let him go.

......

During this time, Tang Yi did have a lot of things.

First, he took a big class for three days, and then although it was changed to a lesson every two days, the strategy class also asked him and Wang De, the Duke of Luguo, to come in turns, which was basically the frequency of two classes in three days.

It seems to be quite relaxed, but don't forget, he's a student himself! He didn't think about this subject, but he couldn't run away from the next subject.

Moreover, more than 100 smelting craftsmen found by Zeng Gongliang also entered the mountain, and he also began to study the problem of ferrochrome smelting.

The original Huishan porcelain kiln had already been demolished, and this time Tang Yi simply said hello to Cao Tong and built the new kiln in the back mountain, next to the Cao family's charcoal field.

First, coal coking.

This is not difficult, Tang Yi knew that coking in later generations used the "dry distillation method", that is, to isolate the raw coal from the air and coke it at high temperature.

As long as Tang Yi explains the basic principles to the craftsmen, he doesn't have to worry about how to build a furnace.

As for what temperature and what heat to use after completion, Tang Yi didn't know, it was nothing more than more experiments, and he could always find a suitable data.

The benefits of the imperial court were revealed, Zeng Gongliang waved his hand and built ten coke furnaces at once, so that Tang Yi could try it vigorously to ensure that the coke could be refined as quickly as possible.

In this regard, Tang Yi can't do anything else except scold.

Zeng Gongliang is as shameless as Wen Yanbo, which is especially generous to others. It is true that he is the one who came out, but it was Tang Yi's money that was spent.

Grandma's, of course he doesn't feel distressed!

The coke was quickly refined.

On the day of the baking, not only Tang Yi was there, Zeng Gongliang was there, and even Zhao Zhen was there.

When pieces of coke with fine honeycomb holes came out of the oven, Tang Yi clenched his fist excitedly.

Zeng Gongliang didn't know why, "Zihao, why are you so excited?" ”

Tang Yi doesn't like to deal with him, he knows a fart!

Zeng Xianggong only thought that this was a necessary thing for smelting ferrochrome, but he did not know that the emergence of coke can be said to be an epoch-making product for metal smelting and a milestone in the history of metallurgy.

This thing not only greatly increases the smelting temperature, but with Tang Yi here, he can also use the chemical properties of coke as a catalyst, and some non-ferrous and rare metals that cannot be obtained in this era can be refined, and then make alloys with various properties.

And, most importantly, the emergence of coke will raise the level of iron smelting in China to a big step.

There is no doubt that Huaxia's iron-smelting technology has a long history and is very advanced.

However, Huaxia iron is not the strongest iron in the world, and even in Asia today, it is not the strongest steel. Although the iron-smelting technology of Japan and some small South Asian countries was inferior to that of the Central Plains, the weapons they created were not worse than those of the Great Song Dynasty.

Why?

Because a chemical element plagued the metallurgical industry of the Great Song Dynasty - sulfur.

In the Central Plains, iron and forged steel have been using coal as fuel for a long time. It's not that coal is better than charcoal, but that the timber resources in the Central Plains have long been cut down, and coal cannot be used as an alternative fuel.

The biggest difference between coal and charcoal is that the sulfur content in coal is very high, and the sulfur in the coal is integrated into the steel during forging, which greatly reduces the performance of iron.

This is also the reason why the Spring and Autumn Period and the Warring States Period was the golden age of Central Plains casting, and famous swords and divine soldiers were not uncommon, and even the casting level of bronze could not be replicated by later generations.

At that time, charcoal was used for casting, and after the Han and Tang dynasties, because charcoal was used, many of the original charcoal forging techniques were lost.

Desulfurization and sulfur reduction are really a major problem that plagues Zhongyuan Metallurgy.

But the emergence of coke will change this dilemma.

The sulphur content of coke is very low, and when it is used to make steel casters, the sulphur content in the steel is also greatly reduced.

If Zeng Gongliang takes coke to smelt iron, he will make sure that this old thing's eyes will fall off.

At present, the strongest iron weapon is Bailian Steel. Hence the name, it is the craftsman who has been tempered and repeatedly smelted and forged. It is used to reduce the sulfur content and control the carbon content by smelting and forging.

But because its process is too complicated, except for the royal honor guard and the general's equipment, nothing else can be used at all.

The weapons of the Ouchi forbidden army have shrunk to seventy-two refinements, and the standard weapons of ordinary soldiers are thirty-six refinements.

The armor worn by the soldiers is eighteen tempers, and even ordinary cast iron. It may be an exaggeration to say that it leaks when it is stabbed, but it is not difficult to see the strength of ordinary cast iron from an ancient idiom - sharpening iron like clay.

As soon as the coke came out, Tang Yi was confident that the overall level of ordnance in the Great Song Dynasty would be raised to a higher level, and the difficulty and cost of casting would be reduced by a few steps.

....

With coke in hand, the next step is to build a smelting furnace and a steelmaking furnace.

It's a lot of work.

The Great Song Dynasty steel-making, with the frying steel method. Wrought iron (low carbon content) and cast iron (high carbon iron) are mixed and smelted together, and the carbon content of the raw material itself is used to neutralize the final product. Because the smelting process requires craftsmen to stir constantly, it is similar to stir-frying.

This is very advanced today. However, Tang Yi heard about the converter steelmaking of later generations, and he didn't look down on this kind of process that was at most a few hundred catties at a time, time-consuming, laborious, and material-consuming.

He wanted to eat a fat man in one bite, and take this opportunity to get out the kind of technology that is several tons of finished steel in one furnace.

Well, Tang Yi has just heard it, and he understands the principle.

However, he didn't know what the converter looked like.

But, it doesn't matter, isn't this someone?

Tang Yi put forward an idea and slowly studied it with these craftsmen.

.....

On this day, he pondered with the craftsman in his small building all morning, and in the afternoon, he had to let everyone go back first, because he had a class today, not a finance and taxation class, but a strategy class.

As soon as you arrive at the main dormitory..... Really!

Except for those who have official duties, almost all the courtiers who can spare time are here.

Supposedly, the strategy class is not a finance and taxation class, and they don't use it to listen.

However, don't forget, the Great Song Dynasty was a literati leading the army, and these civil officials might go out one day to be a prisoner. Therefore, there are more people who come to the strategy course than the finance and taxation class, after all, they have no experience in this subject.

Tang Yi walked to the podium and pursed his lips and smiled, "It's still an imaginary question today." ”

As soon as the following is loosened, the hypothetical question means that you can speak, which is much easier than pure talking.

Tang Yi hung a picture of mountains and rivers one foot wide on the ink board.

"Let's assume today, if the current strategic situation is that the northern barbarians break through Kaifeng, and our people are forced to move south, establish the capital in Jiangnan, and form a situation of confrontation between the north and the south, then ....."

Tang Yi looked around the audience, "As northern barbarians, how can you destroy the Song Dynasty?!" ”

Depend on!

Confucian scholars and courtiers poured a piece.

This special Tang madman is a Tang madman, he dares to think about anything, dare to say anything.

And......

Why are we barbarians?

Why isn't it "how to fight back as a great song?" ”

...... (To be continued.) )