Coke is heated to about 1000 degrees under the condition of isolated air, and finally made through the stages of drying, pyrolysis, melting, bonding, solidification and shrinkage, and will also produce coke oven gas and coking chemical products.

A few days ago, hundreds of blacksmiths urgently summoned by Weifeng have rushed to build a long kiln, which is an inverted flame coke oven with a fixed vault, which is characterized by the carbonization chamber and the combustion chamber separated by an earth wall, but the upper part communicates, so that the gas produced by the carbonization chamber is transferred to the combustion chamber, and the air is introduced from the upper part of the combustion chamber to make the gas burn, the flame is poured down from the top, and discharged into the chimney through the flue at the bottom of the furnace, the disadvantage of this coke oven is that it does not recover chemical products, the amount of gas used for heating can not be adjusted, and the gas output at the end of coking is small.

However, even if there are conditions for recovering chemical products and gas, we don't know how to recover them, on the contrary, the use of this coke oven can minimize environmental pollution.

Since the coal seam was dug out, the blacksmiths immediately began to coke, a long kiln can smelt 400,000 to 600,000 catties of coal at a time, but the first time failed, the reason was that the seal was not done well, and the second time also failed, because the design of the carbonization chamber and combustion chamber was unreasonable, and in the third trial a month later, the coke was finally refined!

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

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

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

"Yes!" The blacksmiths bowed and retreated.

At the same time as building the coke oven, Weifeng also had crucibles made of graphite and clay for steelmaking.

Soon, the crucible was carried by several people, and the pot was piled with pieces of pig iron, and the bottom of the pot was fueled by coke, and as the flames were blazing, all eyes were focused on the bulky cauldron.

I don't know how long it took, but Julia suddenly exclaimed, "Oh! O my God. It's really melting! ”

The iron in the pot is melting into molten iron at a rate that is recognizable to the naked eye. Everyone's faces showed disbelief, and even the blacksmiths' eyes were filled with tears!

"Plop!" With a sound, an old craftsman knelt down uncontrollably, wiped his tears and choked up: "General." The old decay has been fighting iron all his life. Iron has never been seen melting. If it weren't for the general this time, I really couldn't believe that this would happen, so please rest assured. Since we can refine molten steel, we are confident that we can cast any object you need for the general, and sharper weapons, woo woo~~"

As he spoke, he burst into tears with excitement, and the rest of the blacksmiths knelt down after him, snot and tears!

Wei Feng picked up the old craftsman and advised: "Ben will just make a suggestion, the biggest credit lies with you, everyone who participates in the construction of coking and crucibles today will be given a pound of gold each, but although the crucible steelmaking is of excellent quality, the amount of steel produced is small, and the amount of coke used is large, if you make improvements, Ben will also be rewarded!" ”

"We'll do our best, don't worry, General! Woo woo woo ~ ~ " The old craftsman sobbed silently.

In fact, Wei Feng also knows that crucible steelmaking is the first method of making molten steel in human history, and then it is electric arc steelmaking, but with today's production conditions, it is impossible to even think about it, so Wei Feng explained the basic principles of blast furnace ironmaking and open-hearth steelmaking that he knew about Lu Dao, but he did not remember it completely, and he knew that some technical conditions were difficult to achieve, he just gave a direction, hoping that the working people could bring greater surprises.

But to tell the truth, as long as there are enough pots and large enough coke production of steel made from crucibles, it can fully meet Wei Feng's military needs, although the cost of crucible steel making is high, it is cheaper than using copper components, so Wei Feng set up a dragon county in the local area, leaving 5,000 garrisons, 5,000 slang women, and nearly 10,000 prisoners, and encouraging blacksmiths to recruit more apprentices to specialize in mining local open-pit coal mines and smelting steel!

Wei Feng stayed in Xia Long County for more than a month, on July 15 led the army to leave, after more than half a month of marching, finally returned to Panyu on August 5, this trip out of nearly ten months, if the previous sweep of the dock fort for Wei Feng brought a large number of soldiers, then this time, it harvested a huge amount of wealth, as well as more important coke and steel!

Before Wei Feng could go home, he was pulled by Xie Gongyi to the Yamen of the county capital, Xie Gongyi's expression was not very good-looking, and he took out a letter and said: "General, this is the brother of Shi Yan in Huiji who just sent it a few days ago, and the war horse transaction with Yan State two or three years ago has been smooth, but at the beginning of May this year, when Huiji's fleet arrived in Yan Kingdom, Murong Xi withheld all the grain swords, not only did not give a single war horse, but also captured thousands of people on the ship, including sailors, and only released ten people and asked them to bring letters, It is said that since then, the War Horse transaction has been cancelled! ”

"What? Where did Murong Xi get such a big guts? Damn, did Lao Tzu provoke him? Wei Feng suddenly jumped like thunder, and all the good moods disappeared in an instant!

Xie Gongyi secretly smiled bitterly, he saw that Wei Feng was really angry, and hurriedly persuaded: "Please calm the general's anger, according to justice, this matter is quite strange, and it must be discussed in the long run." ”

Wei Feng calmed down a little, took the letter and looked at it, in addition to Murong Xi tearing up the agreement, another thing was that Empress Dowager Ding was given death for rebellion, which made Wei Feng a little confused, in fact, he was still very grateful to Empress Dowager Ding, although he sacrificed Murong Sheng at the seaside at that time, but in fact, it was Empress Dowager Ding who really had great kindness to Liu Yu's family, because the five thousand war horses would be delivered in advance with Empress Dowager Ding's decision.

Wei Feng frowned, and said in a deep voice: "Although Murong Xi and I don't have any deep friendship, but we had a good conversation in Dragon City three years ago, why did he do it to me?" Could it be that when I became the emperor, I turned my face and didn't recognize people's identity? Or do you want to blame the Empress Dowager Ding's rebellion on my head? Or did he ascend the throne and not give him a congratulatory gift? ”

"This" Xie Gongyi said uncertainly: "Back then, the general went to the Yan Kingdom as a lieutenant of Huiji, and was summoned by Murong Sheng, the lord of Yan, and the righteousness thought that Murong Xi succeeded Murong Sheng as the emperor, and he would not say anything about your identity as a general, otherwise, wouldn't it seem that he was narrow-minded and lacking in energy?" And you trade grain and iron with Yan Guo for war horses, which is beneficial to both sides, Murong Xi will not understand, what kind of Empress Dowager Ding's rebellion can't be fought with you with eight poles, how can he not know? As for the congratulatory gift, Brother Yan's heart is as careful as a hair, so he should have brought one with the ship. ”

Everyone in the hall, including Deng Yi and Xian Enzhuo, agreed with Xie Gongyi's analysis, but they became more and more confused, there must be a reason to tear up the agreement, and they couldn't guess Murong Xi's intentions.

Wei Feng also thought about it for a while, but he never imagined that Empress Dowager Ding would expose herself before she died, and she had an affair with Fu Xunying and Fu Huan'e under Murong Xi's nose, Murong Xi couldn't swallow this breath!

I didn't want to understand it, Wei Feng snorted coldly: "Murong Xi thinks it's great to be an emperor?" He robbed Lao Tzu's goods and arrested Lao Tzu's people, this matter must not be stopped, it seems that I still have to go to Yan Kingdom! ”

Xie Gongyi's face changed dramatically in an instant, and he said urgently: "General, you can't go, how can Murong Xi let you go if you go?" Think again! ”

"Eh~~" Wei Feng waved his hand and said: "Righteousness, you want to go wrong, do you think I'm going to Dragon City?" I'm just going to rob a few cities in Yan Kingdom, try to get back some losses, and then capture some local magnates as hostages, and exchange them with Murong Xi for those thousand soldiers, damn it, he is unkind first, don't blame Lao Tzu for being unjust! ”

"This" Xie Gongyi was dumbfounded, Wei Feng's courage was too big, he couldn't help but look at Deng Yi and Xian Enzhuo, but the eyes of these two people actually shot a look of admiration!

Xie Gongyi was speechless for a while, and it took a long time to persuade without giving up: "General, Yan Country is not as small as Silla Baekje, there are always more than 100,000 elite horses, you can't be rash!" ”

Wei Feng replied: "Righteousness, can Huan Xuan move during this time?" ”

Xie Gongyi immediately understood that Wei Feng's mind had been decided, so he had to say helplessly: "Huan Xuan is still the Duke of Chu, and he has not yet become king. ”

Wei Feng nodded and said: "Righteousness, you can rest assured, I led 35,000 cavalry, plus a total of 40,000 sailors and craftsmen to go on the expedition, and when I arrived in Yan Country, it was already a cold winter, and it was the time when the Yan army was the least prepared, not to mention that with my intention to calculate or not, how could the Yan people expect me to come to attack?" I naturally won't touch big cities such as Longcheng, but with my troops, it is not a problem to quickly break through a few small cities, and I haven't been to the north for two years to train my troops, so this time I will use Yanguo to practice my hands. ”

As soon as Wei Feng's words fell, Deng Yi and Xian Enzhuo had already saluted and said, "General, the last general is willing to follow to Yan Kingdom!" ”

Wei Feng said without thinking: "General Deng, you can't go, I have other important things to entrust." Then he looked at Xian Enzhuo again, looking up and down.

This made Xian Enzhuo's heart tighten, and he hurriedly straightened his back!

Unexpectedly, Wei Feng shook his head and said: "The north is bitterly cold, and the snow in winter is often knee-long, and the slang people are Lingnan people, so they must not be able to adapt to it. ”

Xian Enzhuo was anxious when he heard this, and hurriedly arched his hand: "General, I heard that the soldiers you brought to Guangzhou are all Wuhui people, and they are not northerners, they can endure the bitter cold, why can't we slang people endure it?" Generals, don't look down on people! ”

"This" Wei Feng showed a look of embarrassment.

Xian Enzhuo said again: "Please rest assured, the general is used to the bitterness of our slang, and no one will shout that he is tired, and you yourself have said that let Enzhuo fight the world with you, this north will go sooner or later, it is better to take this opportunity to let the slang people adapt first!" ”

Wei Feng hesitated for a long time before he couldn't be embarrassed: "It's okay, but due to the limited manpower, you can only take 10,000 people with you, let's set off in a month, within this month, I will give you all the war horses to use, and you will select the best warrior to ride and shoot!" ”

"Yes!" Xian Enzhuo gave a salute and walked out quickly. (To be continued......)