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Fang Ruitao came to the outside of the city, and the guards on the city quickly opened the city gate for him. Because www.biquge.info important place, Liu Jinhui placed two wings of garrisons here, and the person in charge was Situ Yu, who was known for his delicate thoughts.

After learning the news of Fang Ruitao's arrival, Situ Yu and Yi Chen hurried to greet him. Seeing everyone coming to greet him, Fang Ruitao quickly dismounted and greeted him. As soon as he saw Yichen, he rushed up with a smile, hugged Fang Ruitao and said, "Brother Fang, you are finally here, I miss you to death." ”

Fang Ruitao also hugged Yi Chen affectionately and said, "To be honest, do you miss me, or do you miss my wine." ”

Yi Chen's face was teased by Fang Ruitao and he blushed and said: "Of course I miss you, but it would be better if there was still that wine, although the newly brewed wine from your factories is fragrant, it is not strong enough." ”

Fang Ruitao said with a smile: "This time I came to guide you to start steelmaking, of course, I didn't bring a lot of wine, it is definitely enough for you to drink." ”

"This is really great, His Majesty the Dwarven King is coming to see it recently, and Brother Fang can also meet with His Majesty. Yi Chen's eyes lit up when he heard this, since he had drunk Fang Ruitao's kind of spirit, he felt as light as clear water when he drank any other kind of wine, which made him unable to lift his energy at all.

"It's great that the Dwarven King is coming, I hope to have a good talk with the Dwarf King, maybe we can have more cooperation. Fang Ruitao was also very excited, originally he planned to take the opportunity of this tour in the territory to visit the dwarven residence not far away, but he didn't expect the dwarf king to come over.

"Shall we set the big guys you asked to build and surprise Your Majesty," Yi Chen proposed.

"Of course you can, but we need a necessary intermediate product before we can get started. Fang Ruitao is naturally very supportive of starting to use the steelmaking furnace as soon as possible, but he must be fully prepared.

"What else do you need?" Yi Chen didn't know at all.

"Coke, we have to make coal into coke before we can start making steel. Fang Ruitao's theoretical knowledge once again played a big role, the dwarves were all veterans who had been immersed in smelting for decades, Fang Ruitao just told them the general procedure of coking, and the dwarves who were with Yi Chen immediately understood, they used the several coke ponds that had already been built, and immediately began to refine coke uninterruptedly.

The half-grown children who learned smelting also worked with the dwarves, and their theoretical knowledge was also not low, which could completely solve the doubts of the dwarves in various work, and with their mutual cooperation, the coking work went smoothly. Those mob captives have been pacified after such a long period of labor reform, and the honest people Fang Ruitao chose at the beginning were originally honest people, and now they can fully integrate into this collective.

These people Fang Ruitao had already regarded them as his industrial workers, so when the dwarf and a few half-grown children were studying coking, Fang Ruitao allocated hundreds of people to help them work together, which could be regarded as an apprentice. With them, the labor intensity of the dwarves has been greatly reduced, and at the same time, a large number of coking workers have been trained, which can be described as a win-win situation.

Coking is a very important part of the modern steel industry, which is to heat coal to 1,000 degrees Celsius under the condition of insulating the air, and produce coke, coke oven gas and some other substances through thermal decomposition and coking. Those by-products that Fang Ruitao didn't know he couldn't use at all, so he could only discard them, and the coke oven gas was collected by him through a closed chimney, these things would be high-quality gaseous fuel, and they should never be wasted, and the rest of the things were coke.

Coking takes a lot of time, but fortunately, Fang Ruitao uses a more advanced honeycomb coke oven, which is a circular kiln with a fixed vault, and each hole furnace can hold five to seven tons of coal, which usually takes two to three days to coke.

Of course, this is just the usual situation, and Fang Ruitao improved this furnace by redirecting the coke oven gas from the sealed chimney into the transverse regenerator chamber in the furnace. Such an improvement can greatly improve the coking rate, reduce the coke ash, and reduce the pollution to the environment, and can shorten the coking time to one day and one night.

Coking takes a lot of time, and Fang Ruitao followed Yi Chen and the others down to the mine to take a look. At a glance, Fang Ruitao realized that the dwarves were worthy of being a people living underground, and their mining methods were indeed extraordinary, much stronger than the humans on the Heavenly God Continent.

This time, Fang Ruitao also entered the amethyst mine in Luoyu City at the invitation of Zhu Yunmei, and he found that those people were completely indiscriminate mining. They dug a diagonal tunnel to the vein, and then they opened the tunnel like a swarm of ants, stretching out in all directions, with no regularity at all. In addition to leaving a pillar of rock at intervals to support them, the tunnels they dug were even connected to each other, completely hollowing out the underground.

If there is not enough air circulation for people to survive, they open shafts directly from the ground for ventilation. As a result, their mines are full of caves, and the underground becomes a labyrinth of people who have never entered it without a guide.

The bigger problem is that it is difficult to convert the operation face of such mining, they can only dig the roadway obliquely underground, resulting in a large number of ore layers not being excavated, wasting a lot of resources, in fact, with Fang Ruitao's detection, there are still a lot of amethyst ore underground, but these people don't know.

The dwarven mining is more modern, such as the coal mine that Fang Ruitao entered, they first excavated two parallel inclined roadways for people to enter and exit the mine. Then the dwarves excavated multiple horizontal tunnels on the section of this roadway as a working face, so that more people could be mined at the same time, and it was also safer and not easy to get lost underground.

In addition to these faces, the dwarves also designed special ventilation tunnels, and dug additional inclined tunnels at intervals to make it easier to transport minerals. In addition to the fact that there are no fans installed in the ventilation tunnels, no elevators and some modern equipment, this design is already a very standardized modern coal mine, and it is even more standardized than the unlicensed black coal kilns on the earth.

Originally, Fang Ruitao thought that these mines were unlikely to be mined on a large scale within ten years, but now it seems that with the careful design of the dwarves, it is estimated that his mines can be transferred to formal production within three years, which makes Fang Ruitao very happy.

After visiting the mine, Fang Ruitao did not find much fault, he just instructed Yichen to pay attention to the gas mixed in the coal seam when mining, and pay attention to backfilling the coal gangue to prevent the coal seam from collapsing. In addition, Fang Ruitao saw that the personnel who opened the mine used cloth bags to carry coal outside the mine, and put forward his opinions.

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