The first ten days of April in the lunar calendar, converted into the Gregorian calendar, is already the first and middle days of May. If you put it in modern times, you would wear a thin shirt or T-shirt when you go out. I specially wrapped a thick Songjiang cloth robe in the past.

The temperature of the kiln is high, and wearing thicker can prevent burns from the heat flow from the furnace.

He picked out an old faded green shirt from the bottom of the box. The folds of the clothes were all ironed, but he was still full of vigor. The look that was about to become a great cause came from his keen eyes, flying eyebrows, and slightly raised eyebrows. The corners of the lips flowed out, which made people dare not look at them directly.

Yu Shuban led the horse and waited for him outside the door. Seeing his radiance at first, he ignored his clothes, stepped forward and praised: "What material is this clothes, sir? It must be the craftsmanship of famous masters in Beijing. You look so good looking like an adult."

He rushed to talk too quickly, and after flattering, he realized that the clothes were old clothes, so he hurriedly changed his words and exaggerated that he was handsome, and people carried the clothes.

No, career is the best decoration for a man.

Lord Song smiled slightly, got on his horse, and galloped towards the north of the city in high spirits.

The kiln for burning lime is located in Wuxiang Valley at the foot of Tiantai Mountain, not far from the quarry he saw yesterday. Wherever plaster is used.

Like the quarry above, this kiln is also an official kiln. The magistrate personally inspected it, and naturally there was a big commotion.Leader Song had experience in going to the countryside for inspections. He raised his right hand and waved it in the air, and shouted in a deep voice: "I came here today to repair the stones used in the palace, so I don't have time to accept these vain gifts. Tell everyone to get up and stare at the gray kiln. The government wants to see how the people work when the kiln is fired!"

The steward Weiwei nodded, and immediately went back and everyone kept a close eye on his kiln, showing some diligence and cleverness, so that the adults could rest assured.Yu Shuban leaned forward and led him to the cave dwelling reserved for them by the kiln farm this morning.

Master Yu, who was brought from home in the Song Dynasty, stood in front of the kiln. Not far from the kiln, there was a hill-like pile of stones and a pile of thick, straight, tree-like firewood.

The lime kiln is extremely tall, and looks a bit like a cave dwelling in northern Shaanxi, but it is built of bricks and stones, with an arc roof on the top, and the inside is clean, except for the black stained by charcoal ash.The lime kilns I saw in the south in the Song Dynasty were all round. I was not used to seeing the cave-like style in Chinese books here, so I asked with a narrow eyebrow: "The temperature of the kiln here is different from that in the south. Will there be a difference?"

Master Yu said with a smile: "My lord, don't worry, the lime kiln in Baoding is also built in this style. Although our family doesn't use it, we know how to control the fire."

What's more, there are many craftsmen here who have burned lime for many years.He courteously said to Song Shi: "This kind of stone specified by adults has also been mined here before, and it is often mixed with other stones for calcination, and the lime produced is not much different from other stones. The cooking time should be about the same."

Generally, the firing temperature of quicklime is about 900-1100 degrees, and that of light-burned dolomite is 900-1000 degrees. The temperature is indeed similar.Song Shi had a plan in mind, so he asked him to find an old craftsman who was free, and asked him how to burn lime.

It is nothing more than laying a layer of stones and a layer of charcoal in the kiln, and burning it for seven days.

Limestone burnt limestone was found in the Qijia cultural site around 2000 BC. There is a record in "Zhou Li Qiu Guan Si Kou" that "remove the wall house with the palm and attack it with mirage". ·Dongguan·Kaogongji" also has "Admonition silk...the mirage of obscenity", in which the mirage and mirage both refer to the lime burned from shells.Lime can be used not only to paint walls, but also to brush the silk with lime water burned from mirage shells in the process of silk knitting to bleach and remove a layer of glue on the outside of the raw silk.

The experience and technology accumulated for thousands of years, although there is no modern technology to accurately grasp the raw materials, temperature, and time, the quality of the burned lime is good enough.

He inquired carefully about materials preparation, laying materials, fuel, etc., nodded slightly, pointed to the tall kiln room and said: "The firing method of this dolomite is similar to that of lime, but it is burnt for His Royal Highness King Zhou. Ordinary burnt lime is finer. The stone should be washed clean, and stones of the same size should be picked out. If the difference is too large, they should not be fired in the same furnace. The temperature in the kiln should not be too high or too low, and the firepower must be stable..."

If the size of the stones is too large, the stones that are too large or too small in the same furnace will not be calcined properly under the same fire, which will easily cause the problem of raw burning and overburning, and become waste.

It is not terrible to have waste, but the terrible thing is that it does not react with water, which will affect the accuracy of the proportion of the material when he prepares cement and pesticides in the future.

Originally, the local method was launched, and it was not refined enough. These problems must not occur!

In the Song Dynasty, in terms of technology, he was strict with himself and treated others strictly. Using the excuse that the materials used to build the Zhou Palace must be fine, he instilled several technical points of lightly burning Baiyun to the local steward and the kiln for him. Several craftsmen.

Before the old craftsman said anything, the attendant and Yu Shuban rushed to agree, and the kiln steward even vowed to make all the craftsmen and Lifu in the factory stop their work and speed up picking stones for King Zhou. Ash.

Song Shi raised his hand and said, "His Royal Highness King Zhou loves the people like a son, why would he work so many people for the repair of the palace, and delay the people's livelihood? Yu Shuban watched the burning of dolomite for me, and hired some men to sort it out. , Cleaning the stones is, how much money will be needed, you will write a document later, report it to the meeting, and the government will approve the money for you."

What else do I need to write?Want to report to a meeting?

Didn't the regular meetings in the morning and evening mean that only a few old men held them, and they didn't do their book business?A couple of silver can buy hundreds of catties of stone, and the adults raised their hands to allocate the money, is it worth reporting in court?

Yu Shuban thought that the elder was beating him in advance, so he quickly swore to the sky and made a vow, promising that he would never make money from it, and begged the elder to trust him.

Song Fuzun said righteously: "Is this mansion such a suspicious person? It's just that I have just been assigned a foreign post, and I haven't brought a master to help me. I have to discuss everything with my colleagues. Please help me, my lords. Repairing the palace is like this. It is a major matter that requires the whole family to work together, and Yu Sheng is now in charge of one of the most important ones, how can he not personally present it in front of all the officials in the government?"

It was only then that Yu Shuban realized that the master was not guarding against him, but intended to be promoted and reused. He immediately beamed with joy, and said repeatedly: "Thank you for your cultivation, sir!"

Song Shi stopped his courtesy, and asked again: "When will the coal I want be delivered? I originally planned to use this kiln to burn the lime and then burn the coal to make coke. Seeing that the dolomite will be burned for seven days, there is no way for the coal to arrive." If it's really useful, we have to find another kiln..."

Coke oven gas will be produced during coking, and a flue must be opened on the top of the kiln to release smoke. This kind of kiln that is closed on three sides and only leaves one feeding port is not suitable.

He talked about the requirements of the charcoal kiln, and several local clerks, stewards, and craftsmen around him had some ideas in their hearts. Coal, but do you intend to burn the iron charcoal used in ironmaking? If you want iron charcoal, we also have it in Hanzhong, and there are more in Shanxi. Coal mines, willing to buy for the Grand Master!"

Yu Shuban didn't expect that the local steward whom he himself recommended would dare to divide his favor in person, and suddenly he was angry, and the evil turned to gallbladder, and he loudly persuaded: "Your Majesty is preparing charcoal for His Royal Highness Zhou, how can you use it?" The things on the outer road? It must be the natural real estate in our mansion. The master of the mansion personally arranges people to make it is the best! Tiantai Mountain is a place where wood is produced, and several charcoal fields and charcoal kilns have been built under the mountain. It is exactly what the adults said, why don't the adults go and have a look?"

That's right... what he wants is coal tar and pitch, and coke can only be used as a starting point, why spend money on coke.

But since there is a coke plant not far from Hanzhong, why not ask people to buy ready-made tar and pitch from various coal kilns first, and invite a few coking masters with real materials to open their own coking plant in Hanzhong Woolen cloth?

After all, coal dry distillation is also divided into high, medium and low temperature, and the composition of tar produced by dry distillation at different temperatures is not the same.Medium and low temperature coal tar has low bitumen content and is relatively clearer, while high temperature coal tar has high bitumen content, and bitumen can be mixed with concrete, paved roads, and painted roofs... Each has its own use.

He still needs to have a high-quality kiln nearby, so that he can conduct technology research and development by himself, slowly find out a suitable smelting process, and then promote the technology and products to the whole country——

Does he just lie down and eat the benefits of his ancestors 600 years ago without making technological progress?

What can such a style of work accomplish?

Master Song silently criticized himself a few words, then turned around and arranged for the two subordinates who were scheming for him: "It's better not to delay this matter. Manager Yu, keep an eye on this place for me, and ask them to put it away if there is any coal coming." Here, I still have arrangements in the future..."

He asked a question and found out that the steward's surname was Hou, so he said, "Does steward Hou know where there is coking coal in the mansion? How many places are there? How many places are there outside our mansion? I will go back with my mansion later. I have something to do." I want to ask you, maybe I need you to help me buy something."

Hou Guanshi suddenly beamed with joy, like a concubine who has been favored, his body was slightly straightened, his voice was raised a little, and he replied loudly: "Your friend is a coking craftsman, that's all you know, my lord If you want to ask, the little one will bring him to the adults overnight to answer!"

Both of his legs were itchy, and he wished he could run down the mountain immediately to get the charcoal for the old man to play tricks on.

Yu Shuban on the side only hated himself for making a bad move, which made him really fall in love with the adults, and secretly regretted it.But he is also quite a man of the city, never willing to show anything on his face, but secretly staring at the pile of dolomite and the true confidant craftsman brought by Mr. Song's hometown.

As long as the stone is burnt well and the palace is built well, can adults not see his benefits?

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