The forging room is very simple, it has just been raised today, and it has officially opened the furnace today.

Han Qian was accompanying the three princes to hunt and inspect the Yongchun Palace Grange during the day, and it was only at this time that he was able to take a glimpse of the process of refining crude steel by the Han family's craftsmen.

The Dragon Bird Army set up a cantonment military mansion and built and repaired armor, which was the affairs of Gong Cao, which was also something that Zhou Yuan had tried his best to grasp from the beginning, so Han Qian had no chance to seriously touch the steelmaking process in person before, he used to be in Jinling, and what steel forgings he wanted to build were all instructed by Lin Haizheng or other craftsmen of the Lin family to find Gong Cao's craftsmen to help do it.

Zhou Yuan had a request for Han Qian at that time, and he would not embarrass Han Qian in such a detail.

At this moment, he stood in the forging room, just looking at the operation of the two hand forging furnaces in the room, and he felt that it was really too crude.

The working space of the hand forging furnace used to heat the pig iron block for decarbonization and forging after heating, the working space is a concave groove furnace, the tank is filled with charcoal or coal, the air used for combustion is supplied by the hole cavity at the bottom of the tank, the workpiece is buried in the burning charcoal for heating, half of the working space is exposed to the outside, the heat source is dispersed through radiation and hot air convection, how high can the thermal efficiency be, and how much can the furnace temperature be raised?

The air exhaust of the air puff is a leather made of cowhide only, and it is also a blower commonly used in the smelting of gold and iron in the world, what is the internal structure, Han Qian has not had time to seriously study.

These pewlets were directly asked for by the military government worker Cao, and there were two handles at the bottom, and each of them was operated by two slaves and maids to grab the handle and puff it into the forging furnace.

It's just that this kind of manpower is extremely labor-intensive, and Han Qian secretly feels that these two slaves can't work for half an hour, and their arms will be so sore, that they can't lift up, and they need to be replaced by other people.

Perhaps because of the limited furnace temperature, Han Qian looked outside the forging room for a long time, but they didn't see the pig iron rod put in the working trough burn red, Han Qian called a young craftsman to come out, and asked how long it would take half an hour to burn a pig iron rod to be half soft, and then they could sprinkle iron ore powder and turn it over, so that the pig iron ore powder burned into the red-hot pig iron rods little by little.

Han Qian thought to himself, no wonder that even crude steel, which can only make farm tools, is sold at such a high price, and from crude steel to farm tools, it has to be further forged and formed.

It is no wonder that the five famous swords of the Three Kingdoms took three years to make, and even if the world had mastered the steel frying technology of sprinkling iron ore powder for decarbonization after heating, the first-class high-grade swords did have to be sold for hundreds of thousands of dollars before they could be recouped.

And even if Han Qian had seen it cursoly, he knew how much room he could improve after he started.

Otherwise, the working groove of the heating forging should at least be changed to a closed or semi-closed groove chamber.

When the world didn't know, Han Qian knew that the open working trough, the heat of the furnace flame was convectioned and radiated, and a large amount of spilled out, while the closed working trough also needed to have a flue, which could not isolate the convection of hot air, but at least it could greatly reduce the radiation of the heat source.

At this point, Han Qian estimated that he would be able to directly increase the temperature of the furnace.

Of course, there are still some technical problems to overcome in order to withstand the high temperature of the enclosed working tank chamber and need to be strong and fire-resistant, so as not to collapse and hurt people at every turn.

In addition to the working groove, the wind row was too primitive in Han Qian's eyes.

Although the world can make water drainage, that is, use the water flow to impact the wheel of the waterwheel, and drive the reciprocating wheel to squeeze the skin bag to blow, which is much more labor-saving than manpower blowing, but the Yandang Rock is flat around it, and the water flow in the canal is extremely slow, which is far from enough to drive the waterwheel.

The furnace temperature is also directly related to the amount of air pumped in, how to solve this problem?

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Han Qian was thinking about how to improve the wind row facilities, and the third prince Yang Yuanpu's mind was diverted by other things, and asked Han Qian curiously:

"There seems to be a strong aroma of wine wafting from the courtyard in the east, is it the wine jar in Master Han's house that has been smashed?"

"How many wine jars do you have to smash to have such a strong aroma of wine." Zhang Ping said with a smile, he had long noticed that the smell of wine wafted out of the courtyard, but Han Qian had too many secrets hidden in him, and if the third prince didn't mention it, it was inconvenient for him to inquire blindly.

He believed that Shen Yang and Zheng Hui should have noticed this a long time ago.

Han Qian came back to his senses, retracted his vision from the forging room, and said, "At that time, there was a lack of strong brew in the world, so I just couldn't be idle, so I secretly brewed some wine to drink. ”

The actual liquor franchise system of Dachu, there are only more than ten liquor shops in Jinling City to get the official certificate of liquor from the liquor business of the salt and iron envoy, and they are qualified to make liquor for external sales, and other liquor shops and brothel villages all need to buy liquor from these eighteen liquor shops.

However, as long as private moonshine water is not taken out and sold publicly, the government is not restricted.

Han Qian didn't mind taking everyone into the scene of steaming sake lees in the East Cross Courtyard.

The retort pot that Han Qian made at this time was directly put on the big stove to steam, and a large conical copper lid was buckled on the top, and a copper round pipe with the thickness of an arm was drawn out of the big copper lid.

The large stove has a built-in charcoal to cook sake lees, and the hot steam is steamed, and it is drained out obliquely downward through the copper pipe.

Since Han Qian hadn't figured out how to continuously supply cold water to the condenser pipe at this time, he hadn't put the condenser pipe into the copper pipe yet.

At this time, steaming wine mainly relies on copper pipes to contact with air to naturally dissipate heat.

At this time, even though the fire under the stove is very small, there is still a large amount of wine overflowing, and only a small amount of wine seeps out against the copper pipe wall, and continues to drip into the pottery urn below.

Han Qian poured a few glasses of the wine that had been steamed, handed them to the three princes, Shen Yang, Zheng Hui, and Zhang Ping to taste, and asked Zheng Hui with a special smile: "How is my private Yandangchun compared to the wine made by the Zheng family in Huangzhou?" ”

Even if Zheng Hui is not the head of the Zheng family, he is also the most core disciple, and he naturally knows the Zheng family's secret wine-making method, which is actually to use the method of continuous throwing to improve the intensity of the wine, which can already be said to be a rare spirit in the world, but he walked into the steaming room and smelled the rich aroma of the wine in the room, and knew that this wild goose spring was stronger than the wine made by the Zheng family.

Zheng Hui took a sip, the wine had not been blended, and the entrance was somewhat dull and tasteless, but a line of fire went down his throat, which was definitely much stronger than the Zheng family's wine, and he was secretly shocked in his heart, he didn't know what Han Qian was teaching and even involved in winemaking.

"I didn't expect that Lord Han is also a famous winemaker, I'm afraid it's hard to find such a strong wine in the world, right?" Zheng Hui said.

Han Qian smiled slightly and said, "It's just picking up other people's teeth, what kind of winemaker am I?" ”

The accuracy of the wine he served to everyone was not high, and the alcohol content was only 30 percent when he took a sample of quicklime, but the alcohol content was also much higher than that of the so-called spirits brewed by the continuous koji method in the world.

Han Qian also roughly remembered that the boiling point of alcohol is lower than that of water, and it can be separated from water by distillation, but it is actually distilled with water, which only doubles the alcohol content.

Han Qian couldn't understand what was going on for a while, but when he saw that the alcohol content could be increased, he knew that it could be further purified by continuous distillation.

It's just the installation of the condenser pipe and how to continue to supply water, Han Qian doesn't have time to think about these problems for the time being, so the current steaming wine is not ideal, and Han Qian is very generous to invite everyone to come in and visit.

Even if Zheng Hui's eyes were as wide as copper bells, and he wanted to see everything in the steaming room in his heart, Han Qian didn't care.

"Master Han has to do so many things, I'm afraid that the slaves and maids in the courtyard are not enough, Master Han will select twenty slaves and maids from the Yongchun Palace Manor!" Yang Yuanpu took a sip of Yandangchun and said.

Shen Yanggang wanted to dissuade him, but thinking of Zuo Si's liquidation this time, Han Qian really lost too much, and His Royal Highness's additional reward of twenty slaves and maids could be regarded as some kind of compensation.

"Han Qian is better to obey his orders than to be respectful, thank you Your Highness for the reward." Han Qian thanked him.

He wanted to do too much, but he didn't have enough people.

In the previous two years, he trained nearly 1,000 familiar craftsmen for the workshop, and they all stayed in the Qiuhu Mountain Courtyard, after all, these skilled craftsmen are all soldiers of the military government, which is different from the Han family's family soldiers.

The more than 900 slaves and maids in Yongchun Palace are mainly the children and clansmen of the defeated Fang who have been fighting for Jianghuai by Emperor Tianyou in recent years, and Han Qian can select 20 households and 120 or 30 people from them, and he can select a group of talents.

In Han Qian's eyes, this is naturally far more precious than directly rewarding two or three thousand acres of land.

Yang Yuanpu was on duty and ordered Zhang Ping to take the list of slaves and maids of Yongchun Palace to Han Qian tomorrow for selection.

At this time, the barbecue scene in front of the official house has been prepared, more than 100 guards took away two mooses and two wild boars to stew meat, and the courtyard provided some additional fruits, japonica rice, and five jars of wild goose spring, which was enough for the guards to eat a little.

Han Qian and the others specially picked a young moose and skinned it, pickled it with spices, refined salt, and other things for half an hour before setting it up and roasting it, naturally the gravy was tender and fatty, even if it was Shen Yang, he was sweating profusely and exhaling happily from the wild goose spring spirit, and he didn't care about what to pay attention to.