Compared with iron ore, coal mine saves the step of smelting, and the mining efficiency is higher.

And there are two open-pit coal mines in Yizhou, which are also easy to mine.

Therefore, coal in Yizhou can not only meet the needs of the local nobles, but also be sold to Bai Feng.

At present, there should be at least 150 steam looms in Yizhou based on the number of steam looms sold to Yizhou in Baifeng.

As long as a small open-pit coal mine is enough to meet the coal consumption.

However, Xiahou Dun and the nobles of Yizhou, through the continuous use of coal, found that coal is not only used as a fuel for steam looms, but also used as a daily fuel.

At the very least, the use of wood can be greatly reduced, and there is no need for such a large firewood room.

Therefore, Bai Feng is also very satisfied with the coal mining and use in Yizhou, and the coal in Hanzhong is not so eager to mine.

At this stage, the main purpose is to increase the iron and steel production in Hanzhong as soon as possible.

Ensure that the output of steam engines in the R&D center and the amount of steel required for subsequent railway construction are sufficient.

After returning to the city from the mine, Bai Feng did not return directly to the house.

He went to a site not far from the mine.

This is the craftsman who built the blast furnace that Bai Feng brought back from Yamatai.

Bai Feng came to take a look at their construction progress.

The manufacture of blast furnaces is not very complicated. The craftsmen who came to Hanzhong to help Bai Feng build the blast furnaces have now completed the construction of two blast furnaces.

According to Bai Feng's plan, twelve blast furnaces will eventually be built here.

This is also to have fast enough smelting efficiency after mining ore with nitroglycerin/dynamite.

According to the efficiency of mining iron ore by manpower, it is enough to build four blast furnaces.

"The construction progress of the blast furnace is good. After the iron ore smelting starts, there is no need to buy iron ore from Yizhou Xiahou Dun. The price he gave is indeed a bit high..."

Looking at the blast furnace being built, Bai Feng thought silently in his heart.

However, according to Bai Feng's plan, there is no problem in building a railway in Hanzhong.

But to build the railway to the various states and counties of Dawei, the difficulties and resistances that will be faced will be great.

The difficulty is mainly the production of steel, but also the technology to build the railway.

Railroads are not called railways if they are not laid on the road.

There is also the problem of dealing with complex terrain.

Bai Feng can only build railways first in relatively flat places now.

......

And so another half a month passed.

The steam train improvements in the R&D center are almost complete.

They are about to test the next steam train.

When Bai Feng went to check the progress, he mentioned to Geng Zhuzi that steam trains would be used first in the mine to transport ore and iron ingots.

"Great!"

Geng Zhuzi said happily after hearing Bai Feng's arrangement.

When transforming the steam train, Geng Zhuzi also regretted that the Hanzhong railway had not started construction.

Now I can finally see the steam locomotive begin to work soon. As the maker of the steam locomotive, Gengzhuzi is naturally very happy.

Li Tiedan, Wang Gang, Xu Dali and other craftsmen who participated in the manufacture of steam trains were also very happy.

In the next process of improving the steam train, it will be more motivated to work.

After Bai Feng explained to Gengzhuzi and the others, the first batch of nitroglycerin/dynamite in the nitroglycerin/dynamite manufacturing workshop also entered the experimental stage.

On this day, Wei Boyang, Zhang Daoyi, Fang Yuan, Zhen Cheng and other alchemists came to the foot of the mountain outside the workshop with the manufactured nitroglycerin/dynamite.

They're going to do their first nitroglycerin/dynamite experiment here.

Bai Feng and Cao Jie also came to the foot of the mountain to watch the nitroglycerin/dynamite experiment together.

"Are you all ready?"

Wei Boyang asked Zhang Daoyi, Fang Yuan and others.

"Ready!"

The two replied to Wei Boyang successively.

Nitroglycerin/dynamite is now buried in the dug cave.

Then everyone came to a place two miles away from the blasting site.

All that was left was a fast-running guard who ignited the explosives.

After the guard completed the ignition, he ran wildly in the direction of Bai Feng and the others.

When the guards ran to Bai Feng and the others, the fuse burned to the end.

"Boom--!"

Bai Feng and others first felt a vibration under their feet, and then heard a muffled sound.

Then, at the foot of the mountain where the nitroglycerin/dynamite was buried, a lot of gravel flew out while a puff of smoke rose.

"It's powerful!"

It was also the first time that Bai Feng saw the scene of the explosion of nitroglycerin/dynamite, and couldn't help sighing.

Cao Jie, who was beside him, was already pale.

Wei Boyang, Zhang Daoyi, Fang Yuan, Zhen Cheng and other alchemists were also shocked by the power of the nitroglycerin/dynamite explosion.

"Is this really what we made?"

"The power is too powerful!"

"It's like the mountain **** is angry and the earth dragon turns over!"

At this time, in their hearts, they were all shocked.

The power of nitroglycerin/dynamite gave Bai Feng, Wei Boyang and others, who had witnessed it for the first time, a new understanding of dynamite.

After the smoke and dust from the explosion dissipated, Bai Feng and the others came to the site of the explosion to check.

The place where nitroglycerin/dynamite was buried before has become a pit half a person high, about the size of a house.

"This power... is too great!"

After seeing this big pit, Bai Feng couldn't help but said in a voiceless voice.

In order to ensure that the nitroglycerin/dynamite can blast rocks, this time Wei Boyang and the others used all the nitroglycerin/dynamite they had already produced.

Just for the blasting point, I dug more than a dozen ~lightnovelpub.net~ nitroglycerin/dynamite also used more than ten kilograms.

"Such a big pit!"

Cao Jie was also very surprised when he saw the results of the nitroglycerin/dynamite blasting.

Wei Boyang and Zhen Cheng, as well as Zhang Daoyi and Fang Yuan and other alchemists were also shocked by the big pit after the explosion of nitroglycerin/dynamite.

This is a more direct impact than the vibration and sound produced by the explosion just now!

Then Bai Feng jumped into the big pit after the explosion and began to observe the blasting results of the nitroglycerin/dynamite on the rock.

Wei Boyang and others also came to the big pit.

"Well, the power is enough, but it's too broken to blow these rocks..."

After observing for a while, Bai Feng said to Wei Boyang and others.

"Improvements and experiments are to be carried out next. With such a huge power, how to ensure safe detonation and prevent explosions during storage and transportation are also very important!"