Coal, or coal for short, is a carbonized fossil mineral produced by the remains of ancient plants, buried under the stratum, and subjected to the pressure and temperature conditions of the earth's crust to isolate the air. Pen "Fun" Pavilion www.biquge.info

Coal plays an important role in the modern industry on the earth, whether it is heavy industry or light industry, whether it is energy industry, metallurgical industry, chemical industry, machinery industry, light textile industry, food industry, transportation industry, and various industrial sectors have to consume a certain amount of coal to a certain extent, so some people call coal the "real food" of industry.

The use of coal on Earth is clearly documented after BC and was widely used in modern times due to the Industrial Revolution.

Ruya has never seen or heard a trace of coal in this other world, but Ruya firmly believes that there must be coal in this world, because although it may be different from species on Earth, the most basic rules of physics and chemistry are not much different from Earth.

But knowing that there is a difference between knowing that there is and discovering that there is, but Lu Ya didn't expect that under the casual question, the old man Tie actually pulled him out, and what was even more outrageous was that he only ran a few hundred meters to the place, and the most incredible thing was that here the old man dug out a black stone and handed it to Luya.

"No, it's such a coincidence," Ruya took the black stone with a grimace.

"I'll go, it's not true" Lu Ya grabbed the suspected coal stone in his hand and looked at it over and over for a long time, buckled and broken, and finally gnawed it directly, but then found that he hadn't eaten it before, and even if he did, he didn't know if it was not, so he dropped a sentence "I'll go back and try" and ran to the tribe. The anxious old man also stumbled back and followed.

When the old man finally returned to the tribe to find Lu Ya, Lu Ya was looking at the burning iron furnace with his mouth open in a daze, babbling unconsciously and not knowing what to say.

The puzzled old man immediately looked into the furnace, and this look was also like Lu Ya next to him, looking at the furnace in a daze, the corners of his mouth twitched, and after a while, a howl suddenly came from within the tribe.

"Haha! what a carbon," Ruya laughed.

"It turns out that this thing is the coal you said, and we haven't thought that this kind of stone can be burned for decades. The name of our Blackstone tribe is also because of these coals, hey~" The old man looked remorseful,

"Haha, it doesn't matter, isn't this discovered, look at this amount of smoke or can make better coke carbon species, I didn't expect it, I really didn't expect it, it turns out that our tribe is a coal mine below" Lu Ya also sighed, this is really empty Baoshan and don't know it, but since it was discovered by himself, he must make good use of it.

A few minutes later, more than a dozen slaves set off together with tools, and after a while, all of them rushed to the dirt slope where the coal was found, and ordered all the slaves to disperse and dig, and after a while, they all said that they had dug up black stones, and then these people continued to change positions to explore, and the exploration continued until the sky was getting dark, according to the simple exploration results, Lu Ya was sure that this dirt bag and the whole hill behind it were just a coal mine covered with a thin layer of soil, as for the depth, Lu Ya could not measure it for the time being, but I believe it should not be too shallow. Moreover, Lu Ya estimated that the land under his feet was likely to be covered with coal mines, and according to the general distribution of coal mines on the earth, this coal mining area could even reach several kilometers or more than ten kilometers.

But now I don't think about it so much, Lu Ya commanded these slaves to carry a basket of coal to the tribe each, and the tribesmen saw that these slaves and Lu Ya and the old man Iron were all back in black, and those slaves were still carrying slow black stones, and they were curious to see what they were doing with these black stones.

Everyone found that Lu Ya and the old man were piling up a layer of black stone and a layer of iron ore into the earthen blast furnace, and then they were surprised to find that those black stones were actually ignited, and looking at the burning posture, they could feel the scorching temperature from a distance.

"Brum," Ruya yelled as he closed the door.

As the words fell, the four slaves pulled up quickly, one bellows at a time.

A puff of smoke whistled out of the exhaust vent, and then the amount of smoke began to decrease, but there was still smoke pouring outward, but no flames were seen coming out of the exit.

The old man and Lu Ya were like waiting for their wives to give birth to children around the blast furnace around a strong circle, the onlookers were a little dizzy, from time to time Lu Ya also opened the tap to see, and finally when Lu Ya opened the tap again, a wisp of hot molten iron slowly flowed out of the exit.

"It's out!" Luya exclaimed in surprise.

"What! so fast," the old man sprang over.

"Hey~ You almost pushed me to the stove when you were so slow" Lu Ya was pretended to be stumbling by the old man of the iron, and he was so frightened that he reminded him cleanly.

"Come out and see" The old man put a mold under the outlet with iron tongs, and in a short time it was filled with abrasives. As soon as it cooled down a little, the old man threw it into the water.

The "Click" abrasive shattered, and a white-colored spearhead appeared in front of everyone.

"This, before the forging began, showed such a good appearance" The old man looked happy.

"Hehe, there are many you haven't seen before, and it should be a lot better when the next batch of molten iron comes out, and you haven't tried the converter yet, it is estimated that if the whole process comes down, it can produce several times better steel than that dagger" Lu Ya continued to tease the old man.

Just now, Lu Ya was just to test the melting time of the iron ore, so the impurities inside the water just now were released before they were burned off, and the quality is estimated to be better than pig iron, if the iron ore is fully heated in the furnace, then the final molten iron must be better than those just now.

In fact, when the temperature in the furnace began to drop, the batch of molten iron that had been fully heated and melted finally flowed out, as Lu Ya said, the condition of the molten iron after cooling this time was even better than the spearhead that had been fought for a long time yesterday.

Seeing such a result, the old man had fallen into a mad demon situation again, and a person with his eyes unfocused was walking around with a spearhead.

Knowing that the old man was starting to get excited again, Lu Ya complained that "no interest" and carefully looked at the "steel" that was finally produced.

Yes, Luya thinks that the molten iron produced can already be called "steel". You must know that during the Great Leap Forward, most of the 'steel' produced at that time was not as good as your own, and at that time, the earth blast furnace was still made of wood, and you could use coal.

Berry, who was watching from the sidelines, was holding a spearhead from this production and caressing it gently, and his slow expression couldn't help but make people suspect some of his orientations.

"This is definitely the best spearhead I've ever seen, absolutely, can you give it to me," Berry said to Ruya.

"Uncle Berry, you are satisfied, I told you that this is only a half-finished product, the real finished product is much better than this, besides, how can you use a spear to match your identity, I will give you a wide-backed big ring knife at that time, and promise not to let you pull the wind" Ruya replied with a stinky face.

"What, it's just a half-finished product," Brown Leaf's eyes widened.

"No, no, the spear is very good, the broadsword is too wasteful" Berry didn't want to fight with a broadsword, that kind of long-term thought made the wild power in his body boil, but he also understood how valuable that weapon was, if it was really as Luya said that the quality of the spearhead was better than the current one, then the previous tribe may not be able to exchange the receipt for two or three years, the most important thing is that no one will change it.

"That's it, Uncle Berry, you have paid so much for the tribe, and you will have to rely on you to protect everyone in the future, you just wait for the time to use it, haha"

Feeling a deep sense of accomplishment, Lu Ya felt that he walked a lot more briskly, and separated from the people who were competing to see the 'steel', Lu Ya came to the old man of the iron and patted him when he saw that he was still in a daze.

"Uncle, I told you to be calm, you are so old, you can't be so excited all the time, let's get here today, and when the converter is ready, I will make you a real 'steel' to come out for you to see, hehe"

The charcoal fire in the furnace gradually went out, and the tribe that had been lively for a day gradually fell silent, but the hearts of the vast majority of the tribesmen who were lying on the bed were not at peace.

The crystal full white rice and the incomparably tough steel all made them feel like they were in a dream, and everyone no longer doubted that if they could continue like this, then the Blackstone tribe would definitely become famous for the entire orc clan and the entire continent.

They firmly believe in ・・・・・・