Metal smelting and metal purification have already had a certain foundation in this era. Zhu Cijing was still afraid that Song Yingxing would not understand what he said. Now it seems that Song Yingxing should understand most of the knowledge.

However, the purification of metals is not only a method of heating and reducing, but also many of them require adding acid and alkali additives to be reduced. I wonder if there are any acid and alkali additives in this era?

Zhu Cijing thought for a while and continued to ask: "Chang Geng, have you ever heard of some water-like things that can dissolve metallic things?"

Song Yingxing really knew that he said without thinking: "This gentleman had heard that there was something called green alum oil, which was as color as water at first, but if the copper powder was thrown in, the copper powder would dissolve quickly, and the green alum oil would turn blue-green."

I fainted, this green alum oil would not be sulfuric acid!

Zhu Cijing immediately asked: "Do you know how to make green alum oil?"

Song Yingxing nodded and said, "Gu Gangzi, an alchemist in the Tang Dynasty, recorded the "Stone Refining Gallbladder to Get Essence" in Volume 9 of his "The Nine Cauldrons of the Yellow Emperor's Nine Cauldrons" written by him. This minister has read it."

Song Yingxing, just reading these miscellaneous books, no wonder he failed the imperial examinations many times, and he was just a juren in the end. However, this kind of talent is good, and what he wants is this kind of talent.

Zhu Cijing asked excitedly: "Then have you made green alum oil?"

Unexpectedly, Song Yingxing said in shame: "Prince, please forgive me. I heard that this green alum oil can not only dissolve gold and iron, but also flesh and blood, so I dare not try it and never did it."

That must be sulfuric acid, Zhu Cijing nodded and comforted: "Well, be careful, there is no big mistake. If you need to try to make this corrosive water agent in the future, you must wear protective objects such as rubber gloves, so that you will not hurt yourself. Moreover, for the sake of observation convenience, it is best to use transparent glass bottles or glass tubes as containers."

When Song Yingxing heard this, his eyes shone brightly and nodded frequently. He looked like he wanted to try it right away."

Seeing Song Yingxing's appearance, Zhu Cijiu knew that this guy's enthusiasm for studying was coming again. He simply asked directly: "Chang Geng, have you taken time out in the past few months?"

Song Yingxing thought for a while and asked carefully: "I wonder how much time the emperor is talking about?"

Zhu Cijiong smiled and said, "Of course, the more the better."

Song Yingxing thought about it again and gritted his teeth and said, "Emperor, please forgive me for being brave. You also know that the position of Wei is over. The officialdom is really not suitable for Wei me. It is better for Wei me to step down and concentrate on developing things for the emperor."

When Zhu Cijiong heard this, he said with shame: "Chang Geng, although I am the emperor, I still have to say some rules. You have made many great contributions to me and the Ming Dynasty, but this position has been staying where it is. It's really, alas."

Song Yingxing hurriedly explained: "Emperor, I don't mean this. I am actually quite interested in technical things in my heart. I am not very interested in being an official. Anyway, there are many officials in the Ministry of Works that are competent for the position of Weimin, and all the students led by Weimin have also risen. Even if Weimin let go, there will be no problem. Therefore, I want to leave all the mundane things and concentrate on studying technology. I hope the emperor will succeed."

Upon hearing this, Zhu Cijing frowned and pondered. Song Yingxing's contribution to the Ming Dynasty was so huge that he must not be wronged. This alloy technology must be studied and tested. How can he not only make him concentrate on studying and get the respect he deserves?

Is it a waste to give him a free position? This seems a bit inappropriate. With the rapid expansion of the Ming Dynasty, people are needed everywhere and officials are needed everywhere. Now the court and the government have basically disappeared. Unless it is a kind of wine bag and is useless, it is impossible to get a real official position. Now, a waste of time for him is given a free position. Isn't this shy of him?

After thinking about it, Zhu Cijing finally had a bold idea, which was to set up a dean position for each college in the Ming Dynasty. He was originally a fifth-rank rank, and his status was equivalent to that of a doctor in each department. He could further increase according to his personal contribution, so as to encourage everyone to study technology and do knowledge!

He thought of it and did it. With his current prestige, who dared to jump out and object, so he patted Song Yingxing's shoulder kindly and said, "Chang Geng, then you will be the dean of the Daming Institute of Science and Technology. He is also the fifth-rank official, and his salary will double. No need to worry about other things. Just study metallurgical technology. I will give you ten quotas of deputys, and all of them will be awarded the seventh-rank official, and assist you in researching. As for the candidates, you can choose them yourself. As long as you like them, you can have any fame or fame or not!"

Upon hearing this, Song Yingxing said excitedly: "Thank you for your grace."

Zhu Cijiu nodded, pointed to the desk next to him and said, "Yeah, go and get paper and pen. I will tell you what you want to study."

Upon hearing this, Song Yingxing couldn't wait to jump to the desk, quickly took the pen, ink, paper and ink, placed it on the conference table, brushed the ink a few times, and picked up the pen and waited quietly.

Zhu Cijing sorted out his ideas and said slowly: "I want you to develop an alloy called tool steel. The so-called alloy is to fuse several different metals together in a certain proportion, such as bronze, which is an alloy of copper and Japanese lead. This tool steel alloy has a much higher strength than carbon steel. It is a good material for making various machine tools. However, the metals they fuse are not recorded in ancient books and need to be tried. These metals are manganese, chromium, vanadium, tungsten, cobalt, and molybdenum."

Zhu Cijing said, while using his fingers to gesture on the table, and gestured these words to Song Yingxing one by one.

If Zhu Cijiu wants to purify that metal first, it must be tungsten, because the tungsten wire inside and the glass outside are light bulbs. Now that there are electricity, wires and glass, there is no tungsten wire. Even if tool steel cannot be made for a while, it is a great improvement to be able to make the bulbs!

Zhu Cijing thought for a while and continued: "First, you should first find a way to extract tungsten. Tungsten is a steel-gray or silver-white metal, mainly extracted from black tungsten ore and syellow. In the Huguang area of ​​the Ming Dynasty, there are a large number of syellow tungsten ore. The syellow tungsten ore is grayish, and there are also yellow-brown, green and light red, with grease luster. It is generally biconical octahedral or plate-like crystals. Sometimes oblique stripes can be seen on the crystal surface, and some crystals are skin-shaped, kidney-shaped, granular and dense blocks."

In order to speed up the progress, Zhu Cijing was too lazy to play the puzzle, and directly poured out all the appearance properties and origin of the tungsten ore. Then, he continued: "The tungsten smelting method mainly includes soda sintering method and hydrochloric acid decomposition method. Soda, also known as alkali, is processed from salt and limestone. The specific production method is... "

Zhu Cijiu directly talked about the knowledge in his mind, and Song Yingxing was just a quick note. Zhu Cijiu originally thought that he should have many questions, but he didn't expect that from beginning to end, Song Yingxing had no questions at all, but instead nodded frequently and was amazed.

Judging from his expression, I clearly understood it completely. This guy is simply a genius in metallurgy!
Chapter completed!