"Young Master, Zhangjiapingshan has eleven mining sites, eight lime kilns, one hundred and seventy-five ore workers, and 55 factory workers. 125 dan of cement ore a day and 2125 dan of lime (one load is less than two hundred kilograms). As for cement, it has not been successfully fired yet."

Deng Zisheng led Huang Laifu and others to inspect the mines and various places. He was still a little frightened when he started to speak, but later his expression became more and more stable and his speech became more and more calm and more powerful.

Huang Laifu nodded. This achievement was still as expected. In the future, he would not dare to compare with those cement companies that produce millions of tons of cement annually in the future. Even compared with some small cement factories in later generations, the annual achievement of producing tens of thousands of tons of cement can be achieved. However, because of the limitations of the Ming Dynasty, it is already very good to have this achievement.

As for the cement that has not been produced yet, Huang Laifu doesn't have to worry. At present, mining and firing the lime and clay in Zhangjiaping Mountain alone is enough to bring him relatively rich profits. In many areas in later generations, people who made money by mining and exporting ore were the more famous ones were Shanxi coal mines. In fact, Huang Sihao and others didn't know about this Zhangjiaping Mountain mine site before, otherwise they would have already been in charge of the sergeant mining.

Generally speaking, the ones that were strictly controlled in the Ming Dynasty were iron ore, copper ore, gold and silver ore, and no one would pay attention to this kind of small mines that mine limestone and clay. In fact, in the late Hongwu period of the Ming Dynasty, the government had lifted the ban on restricting the private mining of iron ore, which made the private mining of the Ming Dynasty quite enthusiastic.

What restricts the officers of Wuzhai Fort were that they did not know that there were minerals in this area before. Their thoughts were limited to some fields for generations. Few officers would pay attention to such minerals unless there were some large mines around them.

Moreover, without professionals, even if they know that there are limestone minerals in Wuzhaibao, they cannot find specific mineral sites. Huang Laifu is the same. According to the mineral distribution map of Wuzhaibao in his computer, although he knows that the Zhangjiapingshan area is rich in limestone resources, he still invites special mineral processing craftsmen where the specific mineral sites are.

At this time, the ore dressing in the Ming Dynasty generally uses technologies such as plate selection, grinding, and magnetic separation. The disk selection method is to use the power of water to eliminate impurities and select concentrate ores. Put them in a wooden plate for washing. The grinding technique is: first break the ore, then pound it into fine powder with a mortar, then fill the water with a large barrel, put the ore powder into water and stir to a certain extent, some fine sticks float on the water surface, and some plum sand is suspended in the water. Then wash the fine sticks and plum sand with a pointed bottom wash basin, and then obtain concentrate. Magnetic separation is to select the gravity of the magnet.

Of course, some experienced craftsmen can measure where the ore spots are just based on the surface conditions, but such people are a few after all, and Huang Laifu can't hire such people.

After finding the ore site, it is about to be mined. At this time, the mining technology of the Ming Dynasty generally used traditional methods such as cone chisel, striking, and axe chopping. However, after the middle of the Ming Dynasty, two methods of burning and burning were invented. Burning and burning were used to burn the ore deposits, then pouring them with water, and using the law of thermal expansion and contraction to make the ore explode, decompose, and mine. As for the hot mining method, it was to use fire to explode the ore deposits, crush the ore, and mine.

Of course, Huang Laifu chose the hottest method with the fastest mining speed. This also caused the constant sound of cannons in Zhangjiapingshan area, and also caused the fire in stock in Wuzhai Fort to disappear at an extremely fast speed. It seems that in a while, I will go to Zhenxiwei and Weifang to buy it.

Huang Laifu and others came to a lime kiln. At this time, the lime kiln was burning limestone ore. The so-called lime kiln was actually digging a round hole on the hillside, which was ten meters deep and about five meters in diameter. The kiln door was made of hard stone. Of course, the kiln door could not be made of limestone, otherwise it would be burned down.

The fuel used to burn lime is made of layered, with the lowest layer being grass layer, on the grass layer is coal seam, on the coal seam there is limestone, on the limestone there is coal seam, and on the coal seam there is limestone, so the kiln body is filled. In addition, some ropes are weaved with straw and divided into several lines from the bottom layer to the top layer, as air holes for ventilation up and down after combustion.

After this preparation, you can ignite the fire. Generally, lime in a kiln must be burned for three days and three nights in a row before it can be burned into quicklime. Because continuous operation is required, the ore doctors usually set up a small straw shed next to the lime kiln to rest.

At this time, a craftsman from Kelanzhou invited by Huang Laifu was watching the heat next to the kiln. When he saw Huang Laifu and others coming, he wanted to show his salute. Huang Laifu waved his hand and signaled him to continue.

The kiln gate was extremely hot. Huang Laifu had just stood for a while and immediately sweated heavily and quickly dodged away. Gu Yunniang went further. Only the craftsman of Kilanzhou was still watching the heat at the kiln gate, which made Huang Laifu feel relieved that the 2 taels of silver per month would not be spent in vain.

After burning the lime for three days and three nights, the color of the limestone changed from the original blue-brown to white, and then turned into quicklime. The kiln door was sealed with stones and mud, and after it cooled naturally, it could be out of the kiln. In this way, the lime was trained.

After lime is trained, it is transported to a large jar containing lime in the warehouse. Huang Laifu saw that most of the people working in this area were women. They were laughing loudly while doing it. Many people were covered with white and white dust. Some women were smarter and covered with cloth on their faces and mouths.

This reminded Huang Laifu whether he should make some masks and use them among the people in these cement factories. Otherwise, they would probably get some lung disease or other work diseases after working in this environment for a long time. After wearing a mask, they would have some protective effect.

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After seeing various lime kilns, Huang Laifu and others, accompanied by Deng Zisheng, came to the cement factory and the cement kiln to inspect.

The cement factory is also covered with dust. The most conspicuous thing is that it is a God of Laojun and a Guan Gong. This God of Laojun is the industry god of mining and smelting in the Ming Dynasty, and Guan Gong came to worship as the God of Martial Wealth.

This is a strange phenomenon in the Ming Dynasty. At this time, no matter what industry it is, such as garment stores, garment shops, silk and satin shops, leather shops, coal shops, pork shops, foot shops, etc., they worship Guan Gong as the God of Wealth. This makes Huang Laifu confused. What is the relationship between Guan Gong and the God of Wealth?

But at this time, Mr. Guan Er was covered in gray and looked very pitiful.

There were people coming and going in the cement factory, and everyone was busy. The factory workers, covered with white powder, were crushing the limestone and clay in a certain proportion according to Huang Laifu's statement, grinding them into raw materials in a certain proportion, adding an appropriate amount of gypsum, and transporting them to the cement kiln next to them to calcinate, hoping to burn out the cement that Huang Laifu said.

The cement kiln is not far from the factory. It is an ordinary vertical-kiln cement kiln, which uses brick kiln with brick structure and white mud as clay blanks. Manual feeding and unloading are made according to the text instructions in Huang Laifu's computer. When the firing begins, thick smoke is sprayed out at the end of the kiln, and smoke and dust are fluttering in the wind.

Master Liu from Kelanzhou stood respectfully beside Huang Laifu. His face was smoky, black and purple. When a new powder was calcined, he took a part and mixed it with sand and gravel and water to see how strong it was.

Master Liu concentrated on mixing. Generally speaking, the time required for cement to stir with water until it starts to condense is called the initial set time. The time required for cement to stir with water until it is completed is called the final set time. The initial set time of cement cannot be earlier than 45 minutes, and the final set time cannot be later than 12 hours. Otherwise, the firing of the cement will be considered a failure.

In the end, Master Liu shook his head in disappointment, as it seemed that the firing was not successful, and Huang Laifu was also a little disappointed, but he had no choice. This kind of chemical thing is not as physical thing as a water truck. You must have the experience to get it done naturally. It is impossible to be anxious.

Although Huang Laifu found the recipe for cement firing from his computer and knew in theory how to firing cement, it would definitely not work if he had to burn it himself. Theoretical knowledge is theoretical knowledge, and reality is reality. But just like he can be very good at the plan of the farm, he can't do even if he lets him go to the fields to work by himself. He can't do even any young man in Wuzhaibao. He has to rely on these craftsmen to do these things.

Seeing that the matter was not successful, the manager Deng Zisheng and Master Liu looked a little frightened, especially the manager Deng Zisheng, who repeatedly apologized to Huang Laifu. Huang Laifu said: "It's okay, the firing of this cement is not so easy to succeed. You just work hard next time. But you should not relax. You have to keep in mind this matter, do you understand?"

Deng Zisheng and Master Liu nodded repeatedly to agree.

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Lao Niu: Sanjiang will soon change the list. Friends who have not collected this book should collect it quickly to avoid inconvenience to find it.

Also: Since the upload of this book on the 1st, until the end of today's month, it has been updating every day without interruption. It is really rare. I will praise myself, ＾＿＾(To be continued)
Chapter completed!