Coke is heated to about 1,000 degrees under air isolation conditions and is finally made through drying, pyrolysis, melting, bonding, solidification and shrinkage. It will also produce coke oven gas and coking chemical products. The long kiln coking that is suitable for the productivity and geographical conditions at that time is Changkiln coking, which is something that Weifeng can still remember.

A few days ago, hundreds of blacksmiths who were urgently summoned by Wei Feng had arrived and built a long kiln, an inverted flame coking oven with fixed vaults. Its characteristics are that the carbonization chamber and the combustion chamber are separated by earth walls, but the upper part is connected, so that the gas generated by the carbonization chamber is transferred into the combustion chamber, and air is introduced from the upper part of the combustion chamber to burn the gas. The flame falls from the top and is discharged into the chimney through the flue at the bottom of the furnace. The disadvantage of this coking oven is that it does not recycle chemical products, the amount of gas used for heating cannot be adjusted, and the gas output at the end of the coking stage is small.

However, even if chemical products and gas have the conditions to recover Weifeng, they don’t know how to recycle it. On the contrary, using this coke oven can minimize environmental pollution.

Since the coal seam was dug out, the blacksmiths immediately began to coke. A long kiln could refine 400,000 to 600,000 kilograms of coal at one time. However, the first time it failed because the seal was not done well and the second time it failed because the design of the charcoal chamber and combustion chamber was unreasonable. In the third trial a month later, the coke was finally refined!

400,000 kilograms of coal produced 250,000 coke!

Looking at the coke in Wei Feng's hand, Liu Xingnan said in confusion: "General, isn't this the same as coal? It's just that the color is a little dim and there are some more pores."

Wei Feng was obviously in a good mood and smiled at the blacksmiths and ordered: "Try it. See how it works?"

"As for the order!" The blacksmiths bowed and retreated.

While building a coking oven, Weifeng also made a crucible. It uses graphite and clay as materials, and is specially used for steelmaking.

Soon, the crucible was lifted by several people, with pig iron piled up in the pot, and the bottom of the pot was made of coke as fuel. As the flames ignited, all eyes were focused on this bulky pot.

I don’t know how long it took, Julia suddenly exclaimed: “Oh! My God. It really melted!”

The iron in the pot was melting into molten iron at a speed that could be distinguished by the naked eye. Everyone's face showed disbelief, and even the blacksmiths' eyes were filled with tears!

"Pu!" With a sound, an old craftsman couldn't help but kneel down, wiped his tears and choked and said, "General, I have been fighting iron for a lifetime, and I have never seen the iron melt. If it weren't for the general, I really couldn't believe that this would happen. Please rest assured. Since we can cure the steel, we are confident that we will cast any objects you need, and sharper weapons. Woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo

As he was talking, he was already excited to cry, and the other blacksmiths knelt down immediately, snotting and crying!

Wei Feng helped the old craftsman up and reminded him: "I will just make a suggestion. The biggest contribution lies in you. Today, everyone who participates in coking and crucible construction will give each person a kilogram of gold. However, although the steel is excellent in the crucible steelmaking, it produces a small amount of steel and uses a large amount of coke. If you make any improvements, I will still be rewarded!"

"We will do our best, please rest assured, General! Woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo woo

In fact, Wei Feng also knew that crucible steelmaking was the first method of making molten steel in human history. Then there was arc steelmaking. But with the current production conditions, you can't even think about it. Therefore, Wei Feng explained the basic principles he knew about blast furnace ironmaking and blast furnace steelmaking, but he couldn't remember them completely, and knew that some technical conditions were difficult to achieve. He just gave a direction and hoped that the working people would bring greater surprises.

But to be honest, as long as the steel made with crucibles is sufficiently large and the output of coke is large enough, it can meet Wei Feng's military needs. Although the cost of crucible steelmaking is high, it is cheaper than using copper-building components. Therefore, Wei Feng set up Xialong County in the local area, leaving 5,000 garrisons, 5,000 lie women, and nearly 10,000 prisoners. In addition, blacksmiths were encouraged to recruit more apprentices, specializing in mining local open-pit coal mines and steelmaking!

Wei Feng stayed in Xialong County for an additional month and led his army to leave on July 15th. After more than half a month of marching, he finally returned to Panyu on August 5th. This trip was nearly ten months away. If the previous sweeping fort brought Wei Feng a large amount of troops, then this time he gained huge wealth and more important coke and steel!

When Wei Feng was still in the future, he was pulled to the county government gate by Xie Gongyi. Xie Gongyi looked not very good and took out his letter: "General, this is the brother Yan of Kuaiji's inner-shistorian just sent him by someone a few days ago. The war horse transaction with Yan State was smooth two or three years ago. However, in early May this year, when Kuaiji's fleet arrived in Yan State, Murong Xi detained all the food and swords. Not only did he not give a war horse, but he also arrested thousands of people on the ship, including sailors, and only ten people were released, asking them to bring a letter, saying that the war horse transaction was cancelled since then!"

"What? Where did Murong Xi get such a brave man? Damn, did I provoke him?" Wei Feng was furious and all his good mood disappeared in an instant!

Xie Gongyi smiled bitterly. He saw that Wei Feng was really angry and quickly advised: "Please calm down. According to Gongyi, this matter is quite strange, and we must make a long-term plan."

Wei Feng calmed down a little. After taking the letter, he saw that in addition to Murong Xi tearing up the agreement, another thing was that Empress Dowager Ding was sentenced to death for rebellion, which made Wei Feng a little confused. In fact, he was quite grateful to Empress Dowager Ding. Although he sacrificed Murong Sheng on the beach at that time, in fact, the one who really had great kindness to Liu Yu's family was Empress Dowager Ding, because the five thousand war horses were delivered in advance with the decision of Empress Dowager Ding.

Wei Feng frowned and pondered, "Although I don't have any deep friendship with Murong Xi, I also had a lot of conversations in Longcheng three years ago. Why did he attack me? Could it be that he turned against me when he became the emperor and refused to recognize me? Or did he count the rebellion on me? Or did he not give him a congratulatory gift?"

"This..." Xie Gongyi said uncertainly: "At that time, the general went to Yan State as the commander of Kuaiji. He was summoned by the Lord of Yan Murong Sheng. Gongyi thought that Murong Xi would not use the throne of Emperor Murong Sheng to speak out about your identity. Otherwise, wouldn't he seem narrow-minded and incompetent? Moreover, you trade war horses with Yan State with iron, which is beneficial to both sides. Murong Xi would not understand that Empress Ding's rebellion could not be beaten with you. How could he not know? As for the congratulations, Brother Yan was as careful as he should have brought a copy with the ship."

Everyone in the hall, including Deng Yi and Xian Enzhuo, agreed with Xie Gongyi's analysis, but he became increasingly confused. There must be a reason to tear up the agreement. They could not guess Murong Xi's intentions.

Wei Feng also thought about it for a long time, but he never thought that Empress Dowager Ding would expose herself before her death. She had an affair with Fu Xunying and Fu E under Murong Xi's nose. Murong Xi couldn't swallow this!

Unable to figure it out, he simply didn't want to. Wei Feng snorted coldly: "Murong Xi thought it would be great to be an emperor? He robbed me and arrested me. This matter must not be stopped. It seems that I have to go to Yan State!"

Xie Gongyi's expression changed drastically and he said anxiously: "General, you can't go. How could Murong Xi let you go if you go? You have to think twice!"

"Hey~~" Wei Feng waved his hand and said, "Justice, you're out of your mind. Do you think I'm going to Longcheng? I'm just going to rob several cities in Yan State, try to recover some losses, and arrest some local powerful people as hostages, and exchange them with Murong Xi for those thousands of soldiers. Damn, he is unkind first, so don't blame me for being unrighteous!"

"This..." Xie Gongyi was stunned. Wei Feng was too brave. He couldn't help but look at Deng Yi and Xian Enzhuo, but the eyes of these two people actually showed admiration!

Xie Gongyi was speechless and came to his heart. It took him a long time to persuade him unwillingly: "General, Yan State is not a small country like Silla Baekje. There are always more than 100,000 elite cavalry, you can't act irritably!"

Wei Feng answered the question irrelevantly: "Justice, can Huan Xuan move during this period?"

Xie Gongyi immediately understood Wei Feng's intentions and had no choice but to say helplessly: "Huan Xuan is still Duke Chu and has not yet been called king."

Wei Feng nodded and said, "Just be honest, I will lead 35,000 infantry and cavalry, plus 40,000 sailors and craftsmen to fight. When I arrived in Yan State, it was already the coldest winter month, and the Yan army was at its lowest defense. Moreover, with intentional calculations and unintentionality, the Yan people would not expect me to attack? I will naturally not touch the big cities such as Longcheng, but with my strength, it is no problem to quickly break through several small cities. It has been two years since I went to the north to practice troops. This time I will practice with Yan State."

As soon as Wei Feng finished speaking, Deng Yi and Xian Enzhuo both bowed and said, "General, I am willing to follow you to Yan State!"

Wei Feng said without hesitation: "General Deng, you can't go, I have something else to entrust." Then he looked at Xian Enzhuo again and looked up and down.

This made Xian Enzhuo feel tight and he quickly straightened his back!

Unexpectedly, Wei Feng shook his head and said, "The north is bitter and cold, and snow is often knee-breaking in winter, and Li people are people from Lingnan, so they will definitely not be able to adapt. Enzhuo, you must show off."

Xian Enzhuo was anxious when he heard this and hurriedly bowed: "General, I heard that the soldiers you brought in Guangzhou are all Wuhui people, not northerners. They can withstand the bitter cold. Why can't we slang people stand it? General, don't look down on others!"

"This..." Wei Feng looked embarrassed.

Xian Enzhuo said again: "Please rest assured, General, we Li people are used to suffering, and there will never be anyone who screams and is tired. And you have said that if you let Enzhuo fight with you, you will go to the north sooner or later. It is better to take this opportunity to let Li people adapt first!"

Wei Feng hesitated for a long time before he could avoid it: "Well, but because of limited manpower, you can only bring 10,000 people with you. Let's set off in a month. Within this month, I will use all the war horses for you, and you can choose the most exquisite warriors who ride and shoot!"
Chapter completed!