When the homeless people in Qingzhou were still homeless, they didn't pay much attention to the blacksmith, and the homeless people at that time only cared about money and venting their desires. Pen ~ fun ~ pavilion www.biquge.info

However, after the displaced people became rebels, the ambitions in the hearts of the leaders of the displaced people increased, and they wanted to compete for the world, so for people with extremely high iron-making skills like Gao Yan, the rebels in Qingzhou also attached great importance to them.

If you want to fight, you can't do without weapons, and if you want weapons, you have to have a lot of iron, and if you want iron, you have to have an iron-making master, so with Gao Yan's iron-making technology, you definitely don't have to worry about life.

However, Gao Yan knew very well that in the future, Qingzhou would definitely be in turmoil, and the imperial court would definitely send a large army to suppress the rebellion here, and at that time, Gao Yan, who was refining iron for the rebels, would be in danger.

Gao Yan knew very well that in the future, Qingzhou would definitely be in turmoil, and the imperial court would definitely send a large army to suppress the rebellion here, at that time, Qingzhou was absolutely full of war, and once the rebels were cleared, Gao Yan, the people who made iron for the rebels, would be in danger.

Gao Yan is indeed an iron-smelting talent for the rebels, but for the imperial court, there are many talents like him, and it is not rare at all, so once the rebels fail, what kind of fate Gao Yan will have is conceivable.

In addition, at the beginning, when those rebels were still mobs, they killed innocents indiscriminately in Qingzhou, and directly killed Qingzhou into a river of blood, and in the middle, some of Gao Yan's relatives were inevitably killed by the mob.

Therefore, whether it was to not be held accountable by the army of the imperial court, or not to serve the mob that killed his relatives, Gao Yan still left Qingzhou with his family without hesitation, and in the end, he gradually became a homeless person.

This time, because Lin Ze was going to build a steel plant, he directly recruited people who knew how to make iron among the homeless.

Gao Yan saw clearly how Lin Ze treated the homeless, so he immediately signed up, and in the end, with his clever ironmaking technology, he directly became the director of the ironmaking plant.

Even Shen Lian, a person valued by Lin Ze, was not too Gao Yan who could compete.

"What are you doing with such a thick wooden stick on Wednesday? Can you burn it thoroughly?! Quickly saw, saw, saw, and sawed for me......... Really, nothing like this can be done!"

"Remember, put the twigs underneath, and then sprinkle some pulverized coal on top, so that it is easier to burn and faster!"

Gao Yan kept instructing on the side, teaching the apprentices around him how to make charcoal.............

Many people think that it seems easy to make charcoal from wood, but just burn the wood, isn't it?

Hehe, if you really think so, then you are wrong!

Yes, after burning wood, you can get charcoal, but this charcoal can only be used for heating at most, and cannot be used to make steel at all.

To make charcoal that can actually be used to make steel, you first have to build a charcoal kiln and then move the wood into the kiln.

After everything is placed, light a fire directly at the fire nozzle on the first floor, and use the flame on the first floor to roast the wood in the kiln on the second floor.

The moisture in the wood on the second floor is constantly evaporating due to the scorching flame on the first floor, mixing with other volatiles, forming a gray cold smoke.

Note that the temperature here is not very high, so the smoke does not rise upwards after coming out of the chimney, but spreads flat along the ground.

As the temperature gradually rises, the coal and fine wood on the first floor have burned out, and the wood in the kiln on the second floor begins to oxidize and heat up.

If you have a pair of see-through eyes at this time, you can clearly see that the wood material undergoes a thermal decomposition reaction and its composition begins to change.

The unstable components, such as the hemicellulose in the wood, begin to gradually decompose and directly produce carbon dioxide, carbon monoxide and a small amount of acetic acid.

These substances are directly removed from the kiln along with the smoke.

The heat generated by the decomposition of the wood on the second floor gradually pushed the temperature in the kiln to the highest point, about 400 degrees Celsius, at this time, the wood material in the kiln was rapidly thermally decomposed, and the surface of the wood gradually flowed out of the viscous oil-like object.

These substances are large amounts of acetic acid, methanol and wood tar produced by the reaction.

Next, a bubble will bulge on the surface of the wood from time to time, which is a flammable gas such as methane and ethylene, which burns slowly in the oxygen-deficient environment in the furnace to release heat and maintain the kiln temperature.

When you get here, people from outside can actually leave here and do other things, anyway, the wood in the kiln will react slowly on its own, and there is no need for human interference in the middle.

Finally, depending on the humidity and thickness of the wood in the kiln, it is ready to leave the kiln after 12-24 hours.

When preparing to go out of the kiln, the chimney at the top of the kiln must be blocked, because the chimney of the kiln is very small, and the reaction in the kiln is in a very anoxic environment, which completely blocks the source of oxygen, and the oxidation reaction in the kiln slowly stops, and finally, the kiln temperature gradually decreases.

If you need it urgently, you can open the kiln early and pour water on the charcoal, and if you don't need it urgently, you can wait for it to cool naturally in the kiln to less than 100 degrees Celsius before opening the kiln to extract carbon.

In this way, high-quality charcoal, which can be used for iron smelting, was burned.

The charcoal burned in this way has a very high carbon content, low content of impurities such as phosphorus and sulfur, strong reducibility, and a loose and porous structure, which is better than coke in blast furnace ironmaking.

It's just that the cost of refining charcoal is much higher than that of coke, and in industrial production, such a high-cost refining method is not applicable at all, so gradually, coke replaced charcoal.

However, Lin Ze has not started large-scale steel refining now, so there is no problem in replacing it with this charcoal for the time being.

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A hundred meters away from the charcoal kiln, there stood five buildings fifteen or sixteen meters high, which were blast furnaces, blast furnaces for making steel.

These five blast furnaces were built by Lin Ze personally with Gao Yan and Shen Lian.

Lin Ze had never built a blast furnace before, and the only thing he had was some information about blast furnaces on the earth, but Gao Yan had enough experience in building blast furnaces, and Shen Lian also had some, so Lin Ze was able to build five blast furnaces in a week.

Of course, because of Lin Ze's participation, these blast furnaces have changed a little compared to the current blast furnaces in the Chu State.

The first one in front of the head has a wide belly and a gradually narrowing neck, and the appearance is somewhat similar to the blast furnace of the Jingdezhen high vase, which stands not far from the bank of the Xisha River in the steel mill.

This place is a sedimentary rock, and the ground is very solid, even if there is an earthquake, it can ensure the safety of the blast furnace, so Lin Ze chose to build a steel mill here.

Speaking of blast furnaces, many people think that this is a high-tech thing, which only appeared in modern times, and ordinary people don't know about this at all.

If you really think so, you're wrong!

Because, the blast furnace has been invented at a very early age.

As for when it arrived, it was specifically recorded in the Western Han Dynasty.

Cast iron was found in ancient Chinese cultural relics in the 5th century B.C., which shows that smelting has been put into practical use in this era. In the early days, the inner walls of the furnace were covered with clay and used to refine phosphate-bearing ironite.

Therefore, if there is really a time-traveler who goes back to the Han Dynasty or the dynasty after the Han Dynasty, and then wants to make the first pot of gold by "inventing" blast furnace ironmaking, I believe that he will definitely be to death, because blast furnace ironmaking has actually been popularized for a long time.

Not to mention the others, the history is clearly recorded that in the Northern Song Dynasty and Yuanfeng years, the imperial court military weapons supervisor set up blast furnaces on both sides of the Bianhe River, and the red light of ironmaking reflected the sun, day and night.

At the peak of production, the annual steel output in North China alone reached 150,000 tons;

You know, the so-called empire on which the sun never sets did not reach an annual output of 76,000 tons of steel until exactly 700 years later, when it had already begun the industrial revolution.

During the entire Song Dynasty, including the small land area in the early years of the Northern Song Dynasty and the Southern Song Dynasty, including the unfavorable factors of the destruction of production during the war, it was still able to reach an average annual output of 35,000-70,000 tons of steel, which shows the advanced ironmaking technology in China at that time.

It's a pity, alas................

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The construction of a blast furnace is not complicated, even for ordinary people, it can actually be built.

For example, at the end of the 50s in modern China, the people of the whole country were called on to make steel, and even some primary school students, villagers in the production team, and salesmen in non-staple food stores formed iron-making teams to build blast furnaces to make steel and iron.

Although the technical level of these blast furnaces is not high, at least they have established blast furnaces, which are theoretically capable of making iron.

Of course, in the end, because the technology is not mastered, most of them are lost.

However, there are still successes, so it is not difficult to manufacture blast furnaces, but the difficult ones are the technology and recipes of ironmaking.

The first blast furnace that Lin Ze has built now is about 15 or 6 meters high, and the volume of the blast furnace is about 15 cubic meters -- such a blast furnace is larger than any blast furnace here in Chu State, but if such a blast furnace is in the 21st century, hehe......... That's a joke!