"Who's coming?" The soldiers at the head of the city shouted and asked.

"Yang Zhai Guo Jia." Guo Jia pushed the window and replied.

"What do you want?"

"Trade for yourself."

"Wait a minute." Sure enough, those who came did not refuse.

When the drawbridge falls, the city gate opens. Gong Du then led the car into the city.

Tangcheng is more than a mile horizontally and vertically, slightly longer from east to west, and slightly shorter from north to south. It is located in the Ten Mile Tang Pavilion, and in terms of structure, it is a township. Tangcheng is in the middle, and the two cities of smelting furnace and Hebo, each distance is several miles, and the craftsmen become their own settlements, which is the source of the people of the three cities. The three cities are horns of each other, roughly in the shape of the word "product". The furnace city is for iron smelting, the Hebo city is mostly for sword casting, and the Tangcheng city is mostly for craftsmen to live and live.

The car drove all the way, only to see countless smelting blast furnaces lined up along both sides of Tangshui. Around Tanghu Lake, there are especially many iron-smelting furnaces. The chimney on the top of the furnace rises, swallowing clouds and spitting mist. The smoke gathers at the top and grows into a dragon. The clouds are steaming, and the water is down, like a fog, steaming. The ice and snow on both sides of the strait melted, and the buds appeared early.

In addition to charcoal, charcoal and fish oil, it is also a standing fuel. There is also a tuo yuè (tuo yuè) next to the stove to blow the wind and help the fire.

There are also many round kilns, which are widely distributed around the smelter. The round kiln is composed of: kiln door, fire pool, kiln chamber and chimney. The kiln is built in front of the furnace. In addition to being used for burning tiles, bricks, blast pipes, etc., and building furnace materials, there are also various uses such as baking, iron heat treatment, and firing pottery.

The blast furnace body is built with refractory bricks. The foundation of the furnace is made of clay with small pebbles, charcoal, ore powder, etc., and the rammed earth plate is extremely strong. The "feeding port" is located at the top of the furnace, and the craftsman pours the mixed materials such as ore and charcoal into the furnace cylinder and ignites the smelting. The molten iron is discharged from the "tap port", injected into the mold in front of the furnace, and cast into iron plates or iron blocks. Therefore, there is also a "shed" in front of the furnace, which can not only shelter from the wind and rain, but also prevent the molten iron from cooling or exploding in water after flowing out; It is also possible to use the lever erected on the beam to add mixed material to the roof of the furnace, carry the new cast iron block, and clean up the nodules and iron accumulation in the furnace.

Blast furnace cylinder, oval in shape. Points: smelting furnaces, forging furnaces, frying furnaces, iron melting furnaces, etc., to name a few. Nowadays, the advanced "recuperative hot blast furnace" has been used in molten iron. The use of elliptical smelting furnace and blast facilities not only increases the volume of the furnace cylinder, but also helps to improve the iron-smelting capacity. It can also shorten the distance between the air duct and the center area of the blast furnace, thereby improving production efficiency. Similar to a blast furnace, it can produce one ton of cast iron per day.

In other words, the change of the furnace cylinder from round to oval is a technological innovation in the history of ironmaking. It was not until more than a thousand years later that a similar furnace appeared in the West.

A glimpse of the whole leopard. A single elliptical refining furnace can show the strength of the Han Dynasty's skills and stand alone in the world.

Nowadays, the performance tends to be close to steel, and the high-strength iron casting technology, which is called "ductile iron" by later generations, has long been widely popularized. It is not difficult to decarburize cast iron into steel. Quenching, cold forging, frying steel...... Famous craftsmen from all over the world have their own uniqueness.

In the era of cold weapons, the two decisive skills: farming and iron smelting, were unrivaled by the Han Dynasty.

Straight to the point.

The streets and alleys in the city are vertical and horizontal, with wine bars and shops, and so on. There is also a mansion that occupies a large area. In the former Han Dynasty, it was the official temple of "Iron Official". In the former Han Dynasty, iron officials were placed in iron-producing areas, iron officials were set up, and the main drum was cast; In areas where iron is not produced, small iron officials are placed and old iron is cast. In addition to the iron officials of the present Han Dynasty. Now it is the head of the craftsmen and the residence of Tangdian.

The guards in the palace are all wearing iron armor. The expression is solemn, the tiger's back is bear's waist, and the arms are especially strong, all of them are born in Titlex.

Guo Jia also found that the inscriptions on the armor were different. There are Tang, Moyao, Hebo, Deng Shi, Wan Feng, Long Quan, Tai'a, Mo Xie, Gan Jiang, and so on. In other words, the nine famous swords such as Tang, Longquan, Ganjiang, and Mo Xie all come from this. In other words, within ten miles of Tangting, there are nine major casting schools. Each of them is named after the sword he casts, and the name of the sword furnace is named. It is also named after the sword furnace as the sect number.

Sure enough.

Wait for Guo Jia and Gong Du, and enter the room. I saw an old man with a beard sitting at the top of the head. The beard is gray, and he is more than 100 and a half years old. There were four of them each, on the left and right. Baotou Mao flocculent (turban), embroidered in the center with Mo Yao, Hebo, Deng Shi, Wan Feng, Longquan, Tai'a, Mo Xie, Ganjiang, eight sword casting sects. The old man on the head is self-wearing Tang. No more, no less, a total of nine factions.

"Yang Zhai Guo Jia, meet Tang's 'old general'."

"Do you know the old man?" In this way, this person must be the first general of the five senses, and there is no doubt about Tang Dian.

"I really don't know." Guo Jia told the truth: "When I came, I was fortunate to hear about it. ”

"Listen to whom?" The old man asked again.

"My son-in-law."

"Who is your son-in-law?"

"Fufeng Song Qi, Song Yuanyi."

Hearing this, the old man was suddenly stunned. After a while, he said, "I know it too." It's just that this person has long since passed away, and his whole family has been killed. ”

"It's hard to say a word about stealing a life." Guo Jia replied.

The five senses Zhonglang will Tang Dian, which is the great Changqiu Cao Teng, recommended to the imperial court. In the first year of Xiping, Song Qi married the Cao family and married the daughter of Cao Chi, the captain of Shizhong and Changshui. Uncle Cao Chi is Cao Teng of Da Changqiu. In other words, the five senses Zhonglang will have a deep friendship with the Song family and the Cao family. How can you not know the strong Hou Song Qi.

Guo Jia took Song Qi's jade pendant and presented it. Tang Dian's expression can be imagined: "It's really an old man." ”

"Childe is in Shangcai. Because he knew a secret situation, he sent Guo Jia to report. ”

"What's so urgent?"

"A few days ago, Nanyang was defeated and entered Runan. Hiding in the mountains, he will attack this place in a few days and replenish his weapons. Guo Jia replied.

Everyone sat down with different expressions. Tang Dian asked: "Why did you come to Nanyang to defeat the army?" ”

Tang craftsmen, behind closed doors, watched from the wall. It is also common for news to be blocked.

Guo Jia then led Zhao Ci to attack and kill Nanyang Taishou Qin Jie, and told the story.

"There is such a thing." Sit down and talk to each other.

Seeing that it was difficult to reach a conclusion for a while, Guo Jia said again: "This is Jiangxia recruitment, and I have previously followed the Taishou Qin Jie, fought hundreds of battles, and leveled the Yellow Turban Rebellion. Under the iron hooves of Hu Qi, most of them can still escape. Its combat power is not the same as that of the rogue thieves. I don't know if the old general, the weapons to defend the city, are complete. ”

"We are obsessed with forging swords, and we don't know how to do tricks." Tang Dian shook his head: "The bows and crossbows stored are more than enough to resist the rogues." However, if you fight with a hundred elite soldiers, you will not be able to do it. ”

Then the leader of the Hebo faction stood up and said, "When the defeated army comes from afar, it will abandon its armor and lose its armor." There are no siege weapons, and there is a shortage of grain and grass. We wait for the strong walls to clear the wilderness, defend the city, and be invincible. ”

"That's not true." Guo Jiayan said: "When the defeated army comes, there must be internal responses. During the Yellow Turban Rebellion, I heard that there were many Nanyang craftsmen who fled here. There will be defeated armies in the midst of this. If you open the gates of the city at night, everything will be over. ”

"Where is the collection of Nanyang craftsmen?" Tang Dian asked.

"Returning to the master craftsmen, there are thousands of craftsmen from Nanyang. It was difficult to distinguish for a while. Then there was the leader of the Deng Division, who got up and answered.

"Take it all." The leader of Wan Feng said.

"No, you can't. If so, there will be a commotion. Xu did not wait for the defeated army to attack the city, and we have already died in self-inflicted disaster. "The leader of the Deng division waved his hand again and again.

The various factions in the hall, you and I are arguing with each other. It's nothing more than looking ahead and looking backwards, looking backwards and looking forward.

Right now. Guo Jia coughed lightly and led all parties to come together: "There is a plan below that can solve internal and external troubles." ”