In fact, before the Industrial Revolution, the development of the global metallurgical industry was limited by the temperature at which the fuel was burned.

Within the permissible range, the higher the controllable temperature, the easier it is to smelt iron and steel.

The key reason why Feng Yong dared to guarantee that he could use charcoal to make good iron was that he knew that there was a way to increase the temperature of charcoal when it burned in the forge.

That is to add a blower to the furnace for smelting iron.

I remember that when the history books talked about the history of Chinese metallurgy, it was said that the handicraft industry in the Song Dynasty was particularly developed, and what impressed Feng Yong the most was that there was an illustration on that page, which depicted a person pushing and pulling a blower.

The explanation in the book is that a blower can raise the temperature inside the furnace.

When he was making coke, Feng Yong wanted to make a better blower, but unfortunately the time was too tight, and he had to design, test, and even improve the furnace to see how to match the blower......

He is not an all-powerful superman, how can he take care of it?

In the end, a few small testing machines were built.

So that's why he was only able to craft thirty sets of armor - the efficiency was just too low.

Anyway, I didn't plan to make money by smelting iron, this method, I handed it over, and there was no loss.

As far as the current requirements of the prime minister of the Han Dynasty are concerned, as long as he can make good iron, as for the output efficiency, there are not many requirements for the time being.

Solve the problem of existence and non-existence first, and then think of how many problems.

It is a very characteristic way of thinking about the Chinese nation.

Feng Tu Turtle wanted to be lazy with peace of mind.

As for the day, the prime minister of the Han Dynasty suddenly found that charcoal was too restrictive to iron smelting, and if he wanted to produce fine iron better and faster, his eyes would naturally fall on coal - at that time, I made a lot of money just by selling coal and coke!

The methods of smelting fine iron are all handed over by me to the state...... Well, the imperial court, you're always embarrassed to come and rob my coal mine again, right?

If you dare to rob it, I'll pull the queen into the gang again!

If it doesn't work, just tell Zhuge Lao Demon to the bottom, saying that the underground of Nanxiang is full of coal, as long as you are willing to spend effort to find it, you will definitely be able to find it.

Nanxiang is so big, including two counties in later generations.

With the current level of technology, this bit of manpower, digging for decades or even hundreds of years, I am afraid that it will not be able to be dug all.

Decades later, either the big man is gone, or I'm gone, who cares about what happens after death?

It would be even better if the ideal of the prime minister of the Han Dynasty returning to the old capital could really be realized - if he really wanted to return to the old capital, who would care about this bit of coal in Hanzhong? Guanzhong is all over the world!

"How can you make fine iron from charcoal?"

Seeing that Feng Yong was willing to tell the secret technique of the master's sect, Pu Yuan asked a little impatiently.

"Oh, it's easy. To refine iron, you either find the best iron stone, or warm the iron in the furnace...... Uh-huh, the idea is to make the fire in the stove a little hotter. ”

It is often said that China is rich in land and minerals, but there is a sentence that is often overlooked.

That is, there are many poor mines, few rich mines, and many associated mines, which brings many difficulties to smelting.

So it's hard to find high-quality iron ore.

China began to enter the Iron Age in the Spring and Autumn Period and the Warring States Period, but if iron tools completely replaced bronze tools, it still had to be until the Han Dynasty.

Unfortunately, due to the limitation of the temperature of the forging furnace, the improvement rate of smelting technology has been slow.

Therefore, at the current level of iron smelting, it can only be regarded as initial or even primitive, and it is not too difficult for Feng Yong to improve the furnace for iron smelting.

The difficulty lies in how to produce high-quality iron in large quantities.

It is not difficult to add a blower, the difficulty lies in how to add a large blower to improve production efficiency.

"How to burn?"

When Pu Yuan heard this, he finally believed in his heart that Feng Yong could really smelt iron.

Even if you want to make good iron, you can only find a good iron mine, and at the same time, you must pay attention to the quality of quenched iron, but how to make the fire in the furnace burn hotter is not clear.

"I can't say it, I'll draw a picture for Mrs. later."

The stingy Feng Tujiao still remembered what Pu Yuan had just accused him, but he deliberately didn't tell him.

The most important thing is that Feng Yong also thought that since Huang Yueying had studied the book "Luban Jing", then this manual work should not be bad. Legend has it that the inventions of Zhuge Lao Demon in history are inseparable from Huang Yueying, and now it seems that they may not be true.

Give her this blower, what if she can improve it to the way she wants?

Isn't that going to be cool?

This woman ...... To be honest, she is really a superb woman.

Zhuge Old Demon's Blessing...... I can't say.

Feng Tu was thinking nonsense, only to see Huang Yueying turn her head, nod lightly at Zhuge Liang, and then turn to look at him lovingly, with joy at the same time.

"Okay, then I'll wait for you to draw it. It's been a long time coming, so I won't bother the prime minister anymore to ask you. ”

So saying, he got up and walked out.

Seeing this, Pu Yuan had no choice but to reluctantly say to Feng Yong, "Feng Langjun, after talking to Kong Ming later, don't forget about it." ”

Only then did he and Huang Yueying walk out one after another.

Looking at the old demon Zhuge who was sitting on top of him, he couldn't hide a trace of satisfaction under his plain face, Feng Yong suddenly understood, this ...... It seems that the three of them calculated him together?

Just for the secret of armor and weapons made of fine iron?

As for it?

"See?"

Zhuge Liang was the first person under the Emperor of the Han Dynasty, and Feng Yong's change in mind naturally couldn't escape his eyes.

It's just that the prime minister of the Han Dynasty has a bearing after all, and after seeing the two of them go out, he admitted openly, "I won't hide it from you, since Pu Yifan heard that you have armor and weapons made of fine iron in your hands, I am extremely curious." ”

He sighed as he spoke, "Over the years, he has been entrusted by me to find a place to smelt iron that can build good weapons. It's a pity that this has been found all over Shu, but there is no place that can be compared with the Jinniu Mountain when the first emperor was there. ”

"I thought that this matter would be like this, but I didn't expect God to bless the big man to see this kind of fine iron in your hand again, so I had to find you to test it."

"Cao Thief is powerful, occupying the heart of the Central Plains, which is not comparable to the Han who is biased on one side. Therefore, if you want to revive the Han Dynasty, you have to take some extraordinary measures. ”

Understandably, I also know that you have invented a lot of things later.

"In the past two years, I have taken anything from your hands, and I remember it in my heart. Whether you complain or hate, it's all because of me, but there are some things I have to do. ”

"I just hope you can understand one or two for the sake of the big man's weakness."

Seeing Zhuge Liang sitting on the top say these words calmly, and then looking at his face, it seems that he is a little older than the previous two years.

I don't know if it's because the light is too dark to see clearly, Feng Yong always feels that his temples are a little gray.

With a soft heart, Feng Yong spoke, "Yong is a citizen of the Han Dynasty, and he has to do his part for the Han Dynasty, so the prime minister doesn't have to worry about it." After all, in the past two years, although the prime minister has taken a lot of things, he has also given a lot of things, which is enough. ”

Although he kept screaming from the old demon Zhuge old demon, Feng Yong still knew that the Great Han Cheng was already indulgent and tolerant enough to himself.

And secretly gave himself a lot of help.

Besides, the revival of the Han dynasty is almost all his beliefs in the second half of his life.

For the sake of faith, he can even do without his own net worth, what else can you do to him?

Even the emperor has to shrink, and the turtle can still turn over under him?

So Feng Yong never had too many extravagant hopes.

Zhuge Liang nodded, "If you say enough, then I'll take it as enough." Anyway, Dahan can't give you any more things now. If it is ...... later"