For a junior to come here to point fingers, of course Zhang Tingfang is unwilling. Now, Zhang Han is knowledgeable and interested, and he also happily cooperated, and gave Zhang Han the later Runan blacksmith Li Shengzhong. Li Shengzhong's craftsmanship is quite good, and he is also one of the best in the entire workshop. To Zhang Han, Zhang Tingfang felt that it was a bit of a waste, but Zhang Han showed respect for him, and he hugged Li.

The blast furnace for iron-making was used in the Han Dynasty. Zhang Han took a closer look at the structure, inquired about the whole process in detail, and watched Li Shengzhong smelt several furnaces of iron. In the end, it was found that there seemed to be not much difference from modern blast furnaces - in fact, if there was a difference, Zhang Han couldn't see it. He doesn't know as much about smelting as he has learned in the past few days.

However, I have never eaten pork, and I have seen pigs go. According to Zhang Han's understanding, he can still make some attempts.

Zhang Han's attempt was to focus on fuel, and he replaced the charcoal used in ironmaking with coal, but failed. Li Shengzhong once told him that Zhang Tingfang had tested it with coal, but the effect was not good, and the iron smelted in this way was brittle and brittle, and the quality was very poor. Since Li Shengzhong said it unclearly, Zhang Han tested it and found that it was indeed the case.

Only then did Zhang Han remember that China's coal is mostly phosphorus and sulfur, and most of the smelting is coke. He doesn't care, failure is the mother of success, and experiments always fail first.

Then, Zhang Han asked for some coke. Although the coking carbon kiln is not far from the iron-smelting workshop, it is not under the control of Zhang Tingfang, but by Li Jiu, the manager of the glazed kiln.

After Xiang Rang pretended to be an envoy of Daqin, the demand for glaze plummeted, and the Zhang family had no channels to sell it out, so they asked the glaze kiln to reduce the output, even if each person only made one piece of glaze per day, but it must be a high-quality product - Zhang Zhao has always hoped to create a five-color jade bottle. Of course, it would be even better if you could make a bright moon pearl.

As a result, there is a much less need for coke. Later, the lack of manpower in the family greatly reduced the number of coal digging and coking and miscellaneous work, which had not been directly touched with the glaze, and were pulled to reclaim the wasteland.

Speaking of these things, Li Jiu sighed, looking embarrassed. Zhang Han looked funny, and remembered one thing, prisms, concave mirrors, convex mirrors, telescopes, and microscopes...... The future is broad, and these people are idle, so it is better to study these things for him.

In next year's book of heaven, these contents must be added, Zhang Han secretly told himself.

Without further ado, Zhang Han asked for the carbon kiln directly from his grandfather, and only provided coke to the glazed kiln regularly.

Using coke as fuel, this time it was a great success, and the iron ore melted quickly, which surprised Li Shengzhong, but he was experienced enough to make mistakes, and the quality of the finished product was quite good.

In the next few experiments, Li Shengzhong determined the ratio of coke to iron ore, doubled the smelting speed, and increased the output of molten iron per furnace by one-third.

Zhang Tingfang was amazed, raised his thumb, and praised repeatedly: "Okay!" is worthy of Zhang's prodigy, well done......"

Zhang Han smiled, revealing a mouthful of small white teeth, "Sixth uncle, don't laugh at me." If Liubo had gotten the coke earlier, it would have been done long ago. ”

Zhang Tingfang couldn't coax Zhang Han, "hehe" Zhile, but he didn't say anything about what he didn't have.

"Go home for dinner, go home for dinner, today, ask your aunt to make you something delicious......"

Later, a large chimney made of red brick and cement rose from the ground, and Zhang Han built it eight zhang (about 19 meters) high. In order to avoid being seen, the chimney was built in a hollow of a mountain, sheltered by mountain trees on three sides, and the outside of the chimney was painted in an irregular yellow and green cover color, which seemed to blend in with the mountain trees from a distance.

The chimney works well, and the coal burns violently in the blast furnace when the water drain (cowhide sac) blows slightly. Zhang Han made persistent efforts and began to build a larger blast furnace. Zhang's blast furnace was a small one at that time, with a height and diameter of six or seven feet, and Zhang Hanxin built a blast furnace with a height of two and a half zhang and a diameter of one zhang and eight feet to improve efficiency.

Zhang Han finally remembered the regenerator, and after the test, the effect was remarkable. The new blast furnace has additional regenerators on each side and a combustion chamber attached to the roof.

The exhaust gas from the top of the blast furnace first enters the combustion chamber for combustion, and the hot gas rises and enters the regenerator, where the heat is transferred to the brick lattice to make it hot, and the cooled exhaust gas is discharged into the air through the chimney; When one side of the brick lattice is heated to a certain temperature, that is, the brick lattice on the other side is heated with hot gas, and the cold air is blown into the heated regenerative chamber, so that it can absorb sufficient heat from the brick lattice, and it becomes hot air when it comes out, and then it is blown into the blast furnace.

In this way, the air pumped into the blast furnace is always hot, which not only increases efficiency, but also improves the quality of the finished iron.

Today is the trial operation of the new blast furnace, and the previous scene has appeared. said that it was a command, what Zhang Han could do had already been done, and what he did at the scene was given this order.

While 'managing' the iron-smelting workshop, Zhang Han often went to the newly cultivated farm in the south to see how it was being built.

The new farm is close to Mengshan, and when buying land, the county officials Xu received a lot of benefits, and they not only encircled a lot of land, but also encircled a large mountainous area. In the center of the estate, there is a valley from which a stream flows. The amount of water in the creek is not very large, but it is crystal clear, and with the surrounding green trees and rocks, it has a unique view.

Zhang Han has already discussed with his grandfather to build some courtyard houses there, so that the teacher Cen Hui's family can live and run a school there. When the time comes, the family science will be moved over. One sheep is also driven, and two sheep are also herded, of course Cen Hui, such a good teacher, must make full use of it.

Zhang Zhao was a little puzzled why Zhang Han was so concerned, but this was always a good thing, so he happily agreed to him.

For the housing there, Zhang Han put a little thought into it. However, in his eyes, he could not build any special house. It is nothing more than a red brick house, a cement wall, and then a layer of white ash, scraping plaster, opening a few large windows, and so on. However, as a result, the room is much brighter, and it looks refreshing and comfortable.

Perhaps because of the scarcity of things, Zhang Zhao looked at the red brick house in the shade of green trees, liked it very much, and planned to build a few rooms in the Zhang family's mansion after a while. Cen Hui was also very satisfied after reading it, and acquiesced to Zhang Han's bad intentions.

In fact, although a famous scholar like Cen Hui recognized very few formal disciples, he was extremely tolerant of students who came to study in a monastery and usually did not refuse. Therefore, it is not surprising to say that someone has thousands of protégés. As for those who do not study the scriptures and only want to be attached to the wealthy families, the number is even more. However, that's another story.

In order to avoid people's eyes, Cen Hui gave himself a nickname, Mr. Zhou Nan. And in the name of the number, he called himself Zhou Nan. Mr. Cen did not explain the meaning of this alias, Zhang Han knew that the alias came from "The Book of Songs, Zhou Nan, and Juan Er", but he didn't know who Mr. was missing and what he was missing......

In July of the third year of Jianning (170 years), the ethnology officially moved to Bian Nanzhuang.

Zhang Zhao officially talked to Huang Yuan and asked him if he wanted to stay in the clan or if he wanted to become an official. In any case, Huang Yuan was recognized as a member of the Zhang family.

Huang Yuan hesitated, thinking that his heart had been like ashes over the years, but who knows, now that there is a chance, the ashes will rekindle. After hesitating again and again, Huang Yuan still couldn't resist the temptation of being an official, and it has always been the dream of a scholar to honor his wife and son.

So, Zhang Zhao recommended him to Lu as a letter of recommendation. Zhang Zhao promised him that he would find a way to get him a place for filial piety in two or three years. Huang Yuan was overjoyed and took his family to take his post.

At this moment, the older students have already left. Most of the wealthier people in the family have gone out to study, gain more knowledge, or go further in learning; Those who are poorer in the family have already begun to work to support their families, or to become township officials/county officials/county officials, or to help out in Zhang's family.

In the ethnology, Zhang Huan and these people are the elders, and Zhang Han is faintly the leader.

Zhang Jian was the oldest among the several people, and his family background was not good, so he intended to stop studying and become a village official. However, Zhang Han has been friends with him for a long time, and he knows what he can do, but he can't bear to see him buried.

Zhang Jian is only seventeen years old, and it is a good time to study. Moreover, now that today's time, location, and people are all available, Zhang Han can finally do something, it is the time to make great progress, and he also needs help, Zhang Han refuses to let him go. Zhang Han personally talked to his father Zhang Xing, so that he could talk badly, and finally pulled Zhang Jian over.

However, Zhang Jian refused to accept his help again. Originally, the clan was in charge of eating and living and had a Master, but they had already taken advantage of it, and they refused to accept any more salaries. On this issue, Zhang Xing is on his son's side. Zhang Han had a little calculation in his heart, he already had an idea, but he didn't insist, and responded with a smile.

PS: Today's second shift, there are two more. Finally, I shouted, the ticket~