When Wu Yanzhi entered the alchemy room of the Nine Heavens Dao, a smell of burning charcoal greeted him, mixed with some familiar smells, but he couldn't even remember what it was for a while.

As far as the eye could see, I saw a large clay jar upside down on top of a four-foot square alchemy furnace. The diameter of the upper mouth of the vat is estimated to be more than two feet.

What is this old way smelting? Why is the clay cylinder still upside down?

He couldn't help but ask, "Dao Chief, what are you smelting?" ”。 The Nine Heavens Dao Elder replied mysteriously, but he was refining.

Judging by his expression, it seemed that this was some kind of secret technology. He can tell Wu Yanzhi that he has already given him a lot of face!

Hammer? Isn't it brass? Are you familiar with this stuff or me? Wu Yanzhi secretly sneered.

"Dao Chief, how do you refine such a valuable thing, and what do you have to add?" He got up and stepped over, asking deliberately.

The Nine Heavens Dao Leader followed him and said softly: "Wu Lang, this is complicated, you have to add calamine, and you need several other things!"

And it takes seven seven and forty-nine days to be able to refine it, anyway, if you talk too much, Goro may not understand, so I won't go into details! ”

He saw that Wu Yanzhi was very interested in his alchemy furnace, so he played some tricks and briefly told him.

Wu Yan listened, calamine must be the sidex in the yard undoubtedly! This tank is upside down, which is nothing more than to prevent the zinc from evaporating after turning into gas.

But what to wait for forty-nine days is a lie.

Here is a brief introduction to the metal "zinc".

Although zinc has great reserves in nature, ranking among the top few along with iron, it is the latest metal to be refined in ancient times, many years later than gold, silver, copper, iron, tin, lead and mercury. The reason for this is that the zinc becomes gaseous at 907°C and evaporates.

The ancients did not realize this, so it was difficult to capture zinc gas. It was not until the Ming Dynasty that technology was introduced from abroad before mass production.

Of course, there are also people who think that it is our own technology. But to be honest, this possibility is very small, because the production of brass in large quantities abroad is many years earlier than in China. Most academics believe that the technology may have been introduced from India or from West Asia.

In some ancient bronzes, the zinc content is also relatively large, but it is a small amount of zinc infiltration when smelting copper, which is very different from refining zinc alone to match copper alloys.

As for what the Nine Heavens Dao Leader said about adding several substances, it was pure nonsense to cover up its secrets.

Wu Yan Yiyi saw that according to his refining method, he only needed to add copper or copper ore, and nothing else needed to be added.

Calamine is a carbonate mineral calcite group siderite, the main component of which is zinc carbonate (ZnCO3). It also contains small amounts of calcium oxide, magnesium oxide, iron oxide, manganese oxide, etc.

At high temperatures, it will decompose into zinc oxide, and the chemical equation is: ZnCO3==ZnO+CO2.

When carbon is combusted, it will be reduced to zinc, which will become gaseous at high temperature, and the equation is: 2ZnO + C = = Zn + CO2.

This upside-down vat is naturally to capture zinc gas.

However, his thing was not tightly sealed, and the air leakage was very serious, and as soon as the zinc gas came out, it combined with oxygen and turned into zinc oxide and floated away!

Obviously, this is the alchemist who inadvertently discovered that calamine can be used to add copper or copper-containing ore to smelt "鍮"!

Of course, it is more likely to add copper ore, because they want to smelt the "elixir"! There is a lot of very poor quality malachite (copper ore) out there. Good quality malachite is jade, and it does not need to be used to smelt copper.

The chemical equation when adding copper ore is: 2CuO+C==CO2+2Cu.

Of course, the chemical reaction may be different for different copper ores, but it is basically the same, and they are all smelted and reduced with carbon! Charcoal and coal can be used, and people naturally use more charcoal at this time.

Wu Yanzhi deliberately pretended not to know, and said indifferently: "Dao Chief's alchemy is really profound, I'm afraid this furnace can refine a hundred and ten catties of dragons in a year, right?" ”

"One hundred and ten pounds? Where is it easy? Poor Dao can refine ten catties a year, and he is also satisfied. This big vat can't get out of a few taels! The Nine Heavens Dao Leader shook his head.

"Since it's so difficult to smelt, it's really a rare thing." The Way of Martial Arts.

"Of course! These four taels can be exchanged for one tael of silver, of course, they are worth a lot. However, the poor road is also refined to make some playthings and give them to friends.

By the way, there is a pendant made of a hammer over there, if Wu Lang doesn't dislike it, let's use it to make a decoration! With that, he asked the little attendant to bring a brass pendant.

After he took it, he handed it to Wu Yanzhi.

Wu Yanzhi excused himself and said: "This is such a valuable thing, how dare you ask for it in your later life?" ”

"Alas! It's just made of three or two stones, it's not worth a few dollars, so it's a souvenir! "The Nine Heavens Dao Leader wants to stuff it into him.

After a few excuses, Wu Yanzhi had no choice but to take it, but it was a Pixiu, and it was also very exquisite, but the color was not very good, and it seemed that the ratio of zinc alloy was not well mastered.

Of course, he has no way to grasp the proportions of this refining method.

"Thank you for being late!" In fact, this thing is less than a tael of silver, but it is really not very valuable.

The two returned to the low table, sat down and drank tea, and chatted about some idle things. Jiuxiao learned that Wu Yanzhi was really the nephew of the current emperor, and he attached great importance to it.

Because after all, he is a scholar, as long as he wants to be an official, he will definitely have opportunities in the future, and he cannot be compared with ordinary people.

The two chatted for a while, and suddenly someone came in to report: "Enlighten the Lord!" Xue Gong came, and the villain had already arranged it in the living room of the side room of the main hall. ”

"Oh? I haven't seen Xue Gong for a long time, he must have a few rounds to talk to me, I'll go see him immediately, Wu Lang, go, accompany me to meet Xue Gong! When the Jiuxiao Dao Chief heard this, he was very happy.

Wu Yanzhi didn't know who this Xue Gong was, so he came out to greet the guests together with the Nine Heavens Dao Chief.

When I came to the living room next to the main hall, I saw an old man in gorgeous clothes in his sixties. But I saw that under this person's head, his temples were white, but he was in excellent spirits, and there was no spot on his face that was common to old people.

Of course, the meeting is first a few polite words, so there is no need to repeat them. Wu Yanzhi also saluted and learned that this person was Dr. Luantai.

This is a high-ranking official of the fifth grade!

When Xue Gong heard that he was from the Wu clan, his expression was quite cold at first. Later, when I heard that he was coming to Beijing to take the exam, but he didn't pass the first, his expression instantly improved a lot.

He said to Wu Yan: "Wu Lang! Young people, it's better to read more books! Some people rely on the door and suddenly rise to a high position, but they often admit mistakes in ligature! Writing a few words is ugly, disgusting, and very insulting.

Xue Mou was also forty-two years old before he got the middle jinshi, but he is also young, Wu Lang don't be discouraged, maybe he will go to high school next year, and the title of the gold list! ”

"How dare you compare with Xue Gong in the late life, please give me a lot of advice!" Although Wu Yanzhi was very reluctant to listen to these preaching words, he did not show it!

"Well, Jiuxiao Dao Chief, let's go, today you and I will talk about three games. I can't meet an opponent outside, but the Taoist chess skills are profound, and it's interesting to play! He spoke loudly.