Wu Yanzhi smiled and said, "Is there more than four or five thousand?" As you all know, I am also a copper and iron envoy, but I know quite a bit about metallurgy and mining.

In the afternoon, I'll go to the mining sites in the mountains that you mentioned, and then I'll find you some new mining sites! ”

"Then thank you Ambassador Wu, I will rely on the ambassador for the homeless people!" When everyone heard this, they were naturally very happy.

When it was time for lunch, these village owners naturally entertained them very warmly.

After eating, Wu Yanzhi was just about to go out to check the lead mining field, when someone suddenly came to tell Sang Hongfei a message, which made Sang Hongfei very worried!

After hearing this, he hurriedly walked to Wu Yanzhi's side and said, "Ambassador Wu! Just now, an informant from the county said that the Naweishe people had arrived in Fangcheng County, Tangzhou.

His plan of governance was to require everyone to return to their place of origin, and those who returned to their place of origin would have their rent reduced by 30% for the first three years, and then return to normal levels.

If you don't go back to your hometown, you can also settle nearby, but only the rent will be halved in the first year, and it will return to normal in the second year, and there is no guarantee that you will be able to get the land! ”

There is no land for resettlement here?

Wu Yanyi heard that it was estimated that it would be difficult for the displaced people to agree to this plan, and I was afraid that it would have no effect, because after returning to their original place in time, the amount of land would be difficult to guarantee, and it might have been divided by the rest of the people long ago.

Those who stay will only be exempted from 50% of the rent for the first year, so how will the landless farmers pay in the future?

If there is no land here, how can it solve the problem of its survival? How is it possible to make them pay the rent?

Thinking of this, he shook his head and said, "You tell a few village owners and let them consider that we will still go out to inspect the mine as originally planned." ”

"Yes!"

……

Northwest of Pulu Village, seven miles, Lao Xiongqing.

Wu Yanzhi took Sang Hongfei and three entourages to check the lead mining situation here.

When the Song mine owner got the news, he came from afar to greet him. After everyone finished the introduction, Wu Yanzhi went straight to the raw ore dumping point.

At first glance, there is still a lot of ore mined here.

He carefully examined the ores, mainly galena, but also small amounts of sphalerite and copper ore.

It seems that there is no doubt that this is a lead-zinc mine, but the scale is difficult to judge, and it is impossible to judge, because to accurately judge, it is necessary to carry out deep geological exploration.

In his mind, there didn't seem to be any large lead-zinc mine in this place. (Galena is often symbiotic with sphalerite, as well as some chalcopyrite, pyrite, etc.)

Ay! They also don't know the process of zinc smelting, so most of the sphalerite ore is thrown away in vain, which is a pity! He sighed.

Under the leadership of the mine owner, Wu Yanzhi went to the mine, the concentrator, the smelting furnace and the surroundings to take a closer look.

Not bad, the length of the veins that can be mined is about three kilometers long. Of course, the depth is not clear, but it is estimated that a few hundred meters is no problem.

Of course, due to problems with ventilation technology, their mining depth is only twenty or thirty meters, and a lot of resources have been lost, which is a pity!

According to the scale of his mining, there is no problem in mining for another twenty or thirty years.

At this time, there were no drilling rigs or explosives! They still use the most primitive "hot method" to mine ore.

This "hot method" is to burn the ore with firewood first, and then pour it with cold water when it is about to burn, due to the effect of violent thermal expansion and contraction, the stone will naturally crack down.

This is also the easiest way to mine ore or dig roads in ancient times.

For example, the famous Dujiangyan, or the Leshan Giant Buddha, used this method to open the mountain.

After reading it, inside the dam, Wu Yanzhi called the Song mine owner and several major stewards over and asked, "Song mine master, how many people are there in your mine?" How many catties of lead, copper, and iron can be produced in a year? ”

"Ambassador Huiwu, there are a total of 725 people here, and they can produce nearly 30,000 catties of lead, about 1,000 catties of copper, and a little more than 40,000 catties of iron a year!"

"Hmmm! Not bad, that's enough to sustain three or four thousand people. Unfortunately, you have two major problems here, and if they are solved, it will be no problem to double the production.

And the most critical problem is that you have thrown away one of the best things--- zinc ore! This is an essential metal for brass smelting! ”

Zinc? Brass? Metal? When these people heard the new term spoken by Wu Yanzhi, their eyes widened, and they were very puzzled.

Wu Yan looked at it, he was excited, but he said it wrong.

"Let me add an explanation, this brass is 'Hammer Stone', because it is yellow, I also habitually call it brass, as for zinc, it is a similar thing to tin......" Wu Yanzhi began to introduce this method of smelting zinc to the owner of the Song mine and several stewards.

He also told the details of how to process the zinc-smelting crockpot and how to arrange the zinc-smelting plant, and the whole process took nearly two hours.

By the time he was finished, the sun had already set in the west.

Those few people began to be in a fog, and finally after listening to Wu Yanzhi's speech, they almost understood, after all, they were all veterans of metallurgy, and they were proficient in all other metal mining and smelting! It's just that the only thing that hasn't smelted zinc has been.

"As long as you follow my method, according to your current scale, it is not a big problem to be able to produce another 20,000 catties of zinc a year.

The price of this zinc is not yet available on the market, and I estimate that it is possible to sell it for eighty or ninety wen or even one hundred wen per catty, because he can refine the stone! It is definitely more expensive than lead and tin, and there is no problem with twenty or thirty cents.

In addition, your mine is too shallow, and a large amount of ore has not been mined. I'll teach you the most practical ventilation technique, and you can use this technology to mine 100 meters into it! ”

"Oh? Don't know what wonderful ventilation technology is? "The Song mine owner has not recovered from the surprise just now.

As soon as he heard that there was also ventilation technology, which could increase the mining depth by hundreds of meters, it was amazing.

Wu Yanzhi smiled slightly and said, "I'll design a big bellows for you, and there happens to be a small river full of waterfalls below, so you can use this water to drive this bellows."

This uses water to push the bellows, just like the principle of wei. It's just that this bellows needs to be redesigned and manufactured, and you don't understand it, so I'll give you the picture! ”

(Milling: It is a kind of water mill powered by water, which is very common in Guanzhong in the Tang Dynasty, and its efficiency of grinding wheat and rice is very high.) ）

Wu Yanzhi had been working in Shang Fangjian for two months, and knew that at this time, metallurgy was all blowing with skin bags, and the bellows had not yet been invented.

This bellows is not only very useful in smelting steel. It can also supply air to the inside of the mine, which also involves the hair dryer used for mining.

Unlike coal mines, metal mines do not have gas, so the requirements for air volume are not high, as long as it meets the oxygen use of people.

In ancient times, there were no plastics and chemicals, and of course we could not use our hair dryers. And the cloth is too expensive for anyone to afford.

However, Wu Yanzhi has studied the history of mining, and he has also seen relevant materials in Shang Fangjian. They have an easier way: they just make a cylinder out of rattan and make it as dense as possible. Then it can be smeared with yellow mud on the outside, which is the ancient hair dryer, which was very common in ancient coal mines.

These people just don't know how bellows do, and as for hair ducts, they do.

After Wu Yanzhi repeatedly explained the design principle of the bellows, those people woke up like a dream! Again and again, he shouted "Wonderful! ”

Even Jiang Shipeng looked at the principle of the bellows on the side, and couldn't help but praise: "Why didn't anyone think of such a simple thing before?" Wu Lang is really a god! ”

This bellows is a piston, using a wooden board inside and outside the box to control the inlet and outlet, the piston pushes inside, the wooden board inside the box is closed under pressure, and the wooden board outside is opened under pressure.

Naturally, it's the other way around.

………………………… Dividing line ...............................

Bellows:

It should be explained here that although there was a "blast water drain" in the Han Dynasty that had water as the power, it was a skin, not a box-type mechanism.

Pai is the meaning of a row of skins! It is true that he uses water power to drive the air in the skin, but the air volume is very small and the efficiency is very low.

Later generations called it "bellows" in order to deliberately highlight the "wisdom" of our ancestors.

Because it was not until the Song Dynasty that the leather bellows of the water drain were replaced by the wooden doors of the trap door, which can be seen from many sources.

The real "trolley box piston bellows" was not invented until the Ming Dynasty.