said that he was resting, and when he returned to the courtyard, Han Qian had no way to sleep, so he took out a pen and paper to ponder the internal structure of the trolley bellows.

Although he threw the problem to Chen Jitang and them, the main purpose of his action was to force Chen Jitang and them to think deeply and help them break the shackles of conformism, but he did not expect them to really figure out the internal structure of the trolley bellows and fierce fire oil tanks in two days.

Otherwise, Chen Jitang and their brains would not be open for a day, and Han Qian would not let the trolley bellows and fierce fire oil tanks come out for a day?

Xi Ying was not interested in the work of construction, so he went back to the house to sleep first, leaving Zhao Ting'er, a seductive little goblin, to stay up late with Han Qian.

She wanted to see when Han Qian couldn't help it and ate this tempting little goblin with meat and bones into her stomach, so that this little goblin would show off his might to her at every turn.

In addition to using a one-way live to control the inflow and exit of the wind, the tie rod plate piston is used to simulate the extrusion of the air purse.

After the Taoist ideal is understood, the internal structure is not complicated.

The so-called water drawer and fierce fire oil tank are similar to the trolley blower box in terms of structure, mainly from controlling the entry and exit of the wind to controlling the entry and exit of liquids such as water and fierce fire oil.

If there are other differences, they are the choice of materials and the shape of the exterior.

The blower box does not pay attention to strict closure, and it does not matter if there are some small leaks in the water drawer, and if there is a drip leakage in the fierce fire oil tank, the leakage of fuel oil is everywhere, and the hidden danger is big.

In addition to the tie-rod bellows, Han Qian also had to consider the structure of the new forging furnace and the structure of the wind forging hammer.

Yandang Rock is flat and wide, there is no high drop of the stream, which provides convenient conditions for the use of hydraulic equipment, but the wind is strong, and on the basis of the construction of the water mill coal crusher, water mill and water row in the Qiuhu Mountain Courtyard, the vertical sail windmill is built with tarpaulin, since the forging hammer is connected to the shaft of the windmill, in fact, there is no technical difficulty that cannot be crossed in the world.

The vertical sail windmill and the wind forging hammer do not seem to be technically difficult to achieve, but the structure is much more complex than that of the blower box.

At that time, all the parts in the world had to be forged and built by hand, and it was not possible to make them in three or five days, but the new forging furnace proposed by Han Qian, compared with the old hand-forging furnace, just added a relatively refractory and strong furnace top and redesigned the flue.

The main purpose of this is to make the working groove semi-closed, so as to minimize the spillage of the heat source in vain.

Han Qian explained the relevant truth to Zhao Ting'er thoroughly, and Zhao Ting'er would help him do the drawing, so that he could save a lot of things.

The third prince could not live outside the city for a long time, so the next morning the Inner Servant Province sent someone to urge, and had to rush back to the city before noon, but he remembered to ask Zhang Ping to cross the river with the list of slaves and maids from Yongchun Palace to meet Han Qian, and asked him to select twenty slaves and maids from the manor as an additional reward.

It was impossible for Han Qian to call more than 900 slaves and maids to him one by one, so he could only select 20 slaves and maids according to the merits or prestige of his father's predecessors, and Zhang Ping sent 20 households and 127 slaves and maids to Yandang Rock Grange by boat that afternoon.

There is not enough shelter in the village, anyway, it is a slave and maid, so they use a shack to make do with it.

In addition to replenishing the steaming wine room, the forging room, the house-building team, and the boat gang, these men also made up a dozen extra strong laborers to dig ditches on the north side of the existing reclaimed paddy fields to reclaim the polders, so as to grow one or two hundred acres of wheat as much as possible after the water recedes in autumn.

Han Qian gave Chen Jitang and the Du family brothers a problem, and only Chen Jitang came up with a plan two days later.

Although the plan given by Chen Jitang is very different from the blower box designed by Han Qian himself, which is quite cumbersome and complicated, he can manually operate to blow gas into the hearth, which is enough to prove that what he has learned from his family is indeed true.

If it weren't for the drastic changes, even if his life would not be as famous as his father because of Siming Mountain Weir, Han Qian secretly felt that Chen Jitang's future achievements might not be under Yang En, Marquis of Liyang.

In the end, Han Qian also assigned the Du brothers to go to Jinyun Tower, the county prince's mansion, every day to help him copy books—this was also an in-depth learning process for the Du brothers.

Han Qian made Chen Jitang serve as the master of Yandangji, and Zhao Qi assisted Zhao Laoqi in the specific management of slaves and maids and the tedious affairs in the grange.

Anyway, the courtyard is full of his Han family's subordinates and slaves, and who Han Qian assigns to do things is not allowed to be beaked.

Han Qian stayed in Yandang Rock for the next few days, personally supervising the construction of a new forging furnace in the newly built walled house.

Limited by the defects of the construction materials in the world, Han Qian did not dare to build a large furnace rashly, at least he would not spend a lot of money to build a large furnace in Yandangji, and finally controlled the semi-closed chamber working groove of the new furnace within three feet.

In this way, although it is impossible to make large steel parts, or even three steel parts to assemble a complete steel bow and crossbow, the risk of furnace collapse can be greatly reduced.

At present, it is sufficient as a test furnace.

The trolley bellows are drawn and the skilled carpenters are present, making it easier to build.

On August 3, the new furnace about one person high in Yandangji was officially lit, and when he saw the flames rising from a pile of charcoal, it quickly turned pure blue, and the craftsmen of the Han family were so excited that they jumped up.

Where do they want such an easy makeover, where the change will be so great?

At that time, the main thing was to look at the change of fire color and roughly estimate the flame temperature.

It is often said that the furnace is pure green, but in fact, when the smelting of the world can burn the flame to pure blue, it is already the extreme.

This is almost a common sense possessed by craftsmen at that time, and only at this time can the pig iron block be quickly melted into molten iron.

However, the hand-forging furnace built in the adobe house before could not have burned the flame to a pure blue color, and the speed of heating the pig iron rod was naturally extremely considerate of human patience.

Now the flame temperature is raised so quickly, and it is maintained stably there, whether it is frying steel or forging steel, the speed is several times faster than the old method!

Of course, it is not all right to build a semi-enclosed chamber forge and a bellow.

At present, there is no effective way to detect carbon content and impurities, let alone precision testing instruments.

To what extent the steel is forged, as well as the choice of pig iron, iron ore and even quenching materials and methods, can only be explored step by step, and only in the practice of continuous comparison, in order to accumulate enough experience.

It may take a long time to stably forge steel products with excellent performance.

The iron ore produced in each place will also have a relatively independent set of smelting, casting and even quenching methods. This is mainly related to the relatively stable types and content of impurities in iron ore in different places.

After the completion of the new forging furnace, Han Qian appointed Chen Jitang to take the Han family craftsmen to temporarily only use a few kinds of pig iron produced in Xuzhou to explore the method of forging steel parts.

In this way, on the one hand, it can continue to expand the scale of trade shipping between Jinling and Xuzhou, and on the other hand, even if the forging and casting methods that are finally summarized leak out, it can ensure that the origin of iron ore and pig iron can only be Xuzhou.

Although it is not expected that the most demanding steel parts such as steel bow arms will be forged quickly, crude steel for casting agricultural implements will suffice.

In the autumn, the grange excavated ditches and built polders, and planned to reclaim more than 100 acres of polders, and it was necessary to build three or five courtyards to have a large enough place to be used as the anchoring base of the Xuzhou Boat Gang in Jinling.

In this way, the quality of casting agricultural tools and crafting tools can be directly feedback.

"A brick knife sold in the city of Jin and Jinling is sold for 200 yuan, and its profit is only 30 or 40 yuan, and the new furnace built by the adults, and the brick knife is only 70 yuan. When the wind force of the sail is caused, hammer forging and other things are more labor-saving, and the cost can be lower. In the future, even if Zhuangzi specializes in casting agricultural tools, it will be a million profits. Chen Jitang supervised the craftsmen to build the agricultural tools and craftsmen's tools for two days, and soon calculated the consumables and labor consumption of the new forging furnace, and continued to study and improve the quality in the future, but the cost will only be lower.

The monopoly of salt and iron has been implemented since the Han Dynasty, and it is also regarded as salt and iron in the current world.

However, due to the wide spread of iron smelting among the people, almost since the end of the Han Dynasty, the imperial court has no monopoly on the iron smelting industry, so unlike the monopoly system of salt, the control of the iron industry in Dachu is mainly to levy iron taxes, and does not restrict the private mining of iron smelting or casting ironware, and the management is much more relaxed than that of wine, which is equivalent to tea and medicine.

Chen Jitang's meaning is very clear, he suggested that Yandangji apply for an iron field, and in the future, with the support of the county king's mansion, even if it is only for forging farm tools for sale, it should soon become the largest iron field in Jinling City.

Han Qian smiled slightly, and said to Chen Jitang, who was quite economically minded: "The matter of the new forging furnace should not spread out for the time being, you have time to be idle, maybe help me figure out what can be replaced by steel parts inside the sailboat." In the forging room, in addition to the trial production of stainless steel bow arms, a batch of marine steel parts will be mainly forged for personal use! ”

Large-scale iron yards still need to make full use of water resources, and the situation in Jinling is difficult to determine in two or three years, even if a large iron yard is to be built at this time, Han Qian will only put it in Xuzhou.

He doesn't want to make too many moves at present, and what he wants to do more is mainly to figure out a set of mature smelting and forging methods on the basis of the iron ore and pig iron produced in Xuzhou, and then build a batch of marine steel structural parts on a small scale, so that the boat gang can have stronger, stronger but lighter sailboats.

Compared with the scorpion cannon bomb attack, if you can build a stronger warship and directly use the advantages of the hull to ram, the deterrence and destructive power will be stronger in water warfare.

This is clearly reflected in the fact that when defending Xichuan, Yang Qin and his team used war sailboats to attack the ship formation of the Liang Army's sailors, which was clearly reflected - the civilian ships requisitioned by the Liang Army's sailors in Jingxiang were too fragile, otherwise the battle of Jingxiang would not have ended so easily in advance.

And now that so many people are staring at him, Han Qian really wants to directly build a large-scale iron yard, how can the new smelting and forging technology be hidden?

At this time, it was enough for the forging room to only use the Han family's subordinates and slaves, Han Qian not only had the right to restrict them from entering and leaving the village, but also restricted their contact with outsiders and strictly controlled them, and once a large iron yard was built, it was inevitable to hire large-scale craftsmen and craftsmen from outside, who knows how many eyeliners would be stuffed in?

Han Qian and Chen Jitang were talking about his ideas about marine steel parts and the principle of buoyancy, in other words, it was difficult for others to understand that iron was floating in water, but Chen Jitang had a pioneering mind, and many things were thorough, which was even better than Ji Xiyao and Zhao Ting'er.

At this time, Zhao Laoqi walked in and reported: "Lord Zheng, the counselor of the county prince's mansion, came to see the son." ”

"Huh? What is he going to do here? Han Qian was slightly stunned.

Han Qian thought to himself that he was willing to reveal the steaming method to the Zheng family, with Zheng Hui's eyesight, it should not be difficult to deduce the key after reading it, and it was impossible to think that there were some key technical means hidden here, so what did Zheng Hui want to come over to see him alone?

Besides, although he is being lazy now, he will also guarantee to go to the county king's mansion once every two days, Zheng Hui can tell him if he has anything to say.

"Lord Zheng didn't send someone to deliver the post, someone else has already gone to the Zhuangzi in person." Seeing that Han Qian was a little distracted, Zhao Laoqi reminded him and said.

"Ahh He's an uninvited guest! Han Qian didn't expect that Zheng Hui had already arrived at Yandangji, so he took Chen Jitang and Zhao Laoqi and them out to greet Zheng Hui.