During the Northern and Southern Dynasties, it was further realized that not only copper sulfate, but also other soluble copper salts could also react with iron displacement, that is, impure basic copper sulfate or basic copper carbonate was insoluble in water, but soluble in vinegar, and after being dissolved in vinegar, it could also be replaced with iron, and obviously the scope of understanding was expanded. Pen × fun × Pavilion www. ｂｉｑｕｇｅ。 By the end of the Tang Dynasty and the Five Dynasties, the principle of water copper smelting was applied to production, and the Song Dynasty was more developed, becoming one of the important methods for mass production of copper.

Li Xiang was also taken aback when he heard that the copper-making technology had reached such a level at this time, which was somewhat unexpected to him, and he thought that he still knew too little about the technology of the Southern Song Dynasty, so that he was a little constrained, so that many existing technologies did not dare to use.

As for sulfuric acid, because some green substances will appear in the process of hydrolysis to produce copper, these substances can be refined to make sulfuric acid, and can be used again in the production process of hydrolyzed copper, which can also be said to be a model of recycling. At this time, sulfuric acid was mostly used in porcelain, so there were porcelain containers of different sizes in the copper factory, Li Xiang secretly sighed his ignorance at this time, thinking that if he had come to the copper factory earlier, he would not have to customize porcelain jars.

Hearing Li Xiang ask about the production method of copper wire, the person in charge Zhou Liang brought Li Xiang and Wang Lin directly to the production site, at this time a batch of copper wire began to be made, only to see the craftsman first smashed one end of a thin copper strip, and then passed through a mold, clamped and pulled out with iron tongs from the other end, and fixed on the scroll, and then slowly rotated the scroll. Since this mold is immersed in oil, the copper wire is not easily heated during the drawing process, and the oil also acts as a lubricating agent. In a few moments, the copper bar had been completely passed through the mold.

The craftsman thinned the other end of the copper wire, passed through a slightly smaller mold, and fixed it on another reel, and repeated several times, the copper bar has basically become a copper wire, only half the original thickness, and then put the copper wire into the furnace to heat and temper, and after several stretches, the copper wire has only one millimeter thickness.

Li Xiang was very surprised, this stretching method was originally used to make wires in later generations, but if the assembly line is used to produce, the stretching of copper wire is completed at one time, the specific method is: copper wire through a plurality of molds, and after each mold there are reels with different rotation force stretching, and in the final heating furnace, it can be directly painted and baked, and the enameled spool of the finished product comes out.

Li Xiang naturally knew that it was a fantasy to achieve the current level of production methods in later generations, but he was amazed by the ancient craftsmanship of making copper wire. It's not that this stretching method is so advanced in making copper wire, the main thing is that the purity of the copper has obviously reached a certain level, otherwise there would not be such good ductility, of course, this is also the credit of the hydrolysis method for copper smelting.

Li Xiang was surprised, and asked again: "Lord Zhou, what is the thinnest copper wire?" ”

Zhou Liang was not easy to describe for a while, so he took Li Xiang to the warehouse of the finished product, and took out the thinnest sample, Li Xiang estimated that it was about 0.5 mm, thinking that this thickness was enough. I also listened to Lin Weibu: "In fact, if you want to pull it more finely, it is also possible, but no one needs the thin copper wire, and the demand for copper wire is small, and it is mostly used by some craftsmen to make various decorations, or some people use it to make strings." ”

Li Xiang nodded again and again when he heard this, but he thought in his heart that this copper wire is not very useful now, but with a motor and a battery, I am afraid it is far from enough. He thought a lot in his heart, he underestimated the production process of the Song Dynasty for a while, and when he encountered a situation that was not very sure, he often guessed out of thin air, it seems that this is not the way, and he will have to spend time to learn more about the exhibition situation in all walks of life in the future.

After returning to Shaoxi Mansion, Li Xiang found a few more people to help his people.

Li Xiang saw that it was still early, so he took out the model drawing of the printed simple motor.

This motor uses a wooden shaft and copper bearings, and the rotor adopts three sets of coils, which are made into a T-type with ordinary iron sheets, and each group is superimposed with 30 pieces, a total of 90 T-shaped iron sheets are needed, and then the iron sheets are divided into three groups and fixed on the rotor, and then the copper wires are wound on the T-shaped iron in the same order, and each circle can not touch each other when winding, and each layer should be separated by oiled paper for insulation, which is the production of the rotor. In fact, Li Xiang didn't have much time to check how the silicon steel sheet or silicon steel sheet was made at this time, so he thought that as long as it could be run, it would be considered a successful first step.

As for the stator, Li Xiang uses three sets of permanent magnets, each of which is fixed together by a number of small magnets, and the electrode brush is a simple copper brush. In this way, a simple motor design is completed, but Li Xiang put the winding work of the wire group at the end, and he must personally participate in the winding of the wire.

In fact, Li Xiang also looked up the production method of magnets at that time before this, but most of them used ready-made magnetite in ancient times. Li Xiang thought to himself that if there was electricity, at least he could create a stronger magnetic field than a natural magnet, so it would not be difficult to make an artificial magnet.

This night, Li Xiang dragged his tired body back home, and Xiu'e and the others had prepared a sumptuous meal as usual.

During the meal, Li Xiang suddenly said: "It's been a while since I left Rongde County, father, I think I have to go back the day after tomorrow, and the matter here will be handed over to Lord Wang, as for Miss Mengyao, I have to ask you to bother more." The reason why Li Xiang said this is also because he hasn't been back to the county for a long time, and besides, things are almost done here, and he doesn't have to worry about the production materials of batteries and motors, so he can just relax.

Li Kang nodded in agreement.

After eating, Li Xiang returned to the house, but he didn't expect Huan'er to follow suit.

Although Li Xiang is physically strong and has exercised for a long time, after all, the work has been extremely heavy these days, he is extremely tired when he returns home every day, and he falls asleep after dinner.

Seeing this, Li Xiang knew that, he was moved in his heart, held Huan'er's hand and said: "Huan'er, although you are a girl given to me by Lord Lu, I don't treat you as a girl, I can meet you is destined by God, God is destined to be the greatest, and no one can change it." Don't treat yourself as an outsider in the future. ”

Huan'er has long been Li Xiang's person, but when he heard Li Xiang say this, he was overjoyed in his heart, and said, "Young master, Huan'er is your person in life, and your ghost in death." ”

It was night, and Huan'er stayed in Li Xiang's room.

According to Li Xiang's plan, in addition to artillery, generators and batteries are also extremely important things. In the future, these things will be used in cement factories and salt factories, as well as coal mines and steel mills. (To be continued.) )