Not to mention the Qing Dynasty, even during the Republic of China, China did not have much chemical foundation, so this desulfurization must be relatively simple, not very high-tech. Even if the desulfurization is incomplete, it is certainly enough to make the sulfur content in the coal not affect the steel smelting too much.

After thinking about it, Yang Zilu suddenly remembered a term, coke steelmaking. He remembered that the coke was not charcoal, but made of coal. But where does coke come from? Yang Zilu has no samples, so he can only ponder from the words. Jiao proves that he has something to do with fire, but it is definitely not burned directly with fire.

"Is it like making charcoal?" Yang Zilu groaned.

Yang Zilu thought of doing it, anyway, there was coal discarded on the side near the ordnance prison because of the use of charcoal, so there was no need to bother to send someone to the coal mine to carry the coal. Yang Zilu commanded three apprentices to dig a large pit nearby, put coal into the pit, and then burned the coal. After a while, Yang Zilu personally covered the soil with a shovel, and after half a day, the coal was dug out. Yang Zilu immediately noticed that several dry cracks appeared on the surface of the coal, like charcoal, and at the same time, a small amount of mucus was discharged from the cracks, and the mucus had a pungent smell of sulfur.

Yang Zilu slapped his thigh and said, "Okay! I understand! It turns out that this is the desulfurization! ”

While paying attention to Yang Zilu's palace ions, he immediately rushed over, he already admired Yang Zilu very much, and he was even more eager for coal to be desulfurized than Yang Zilu. Because if you can hold charcoal, you can use a lot more manpower, and theoretically each iron-making furnace can only smelt four furnaces of molten iron a day.

But with coal, it is different, and in one more hour, five furnaces of molten iron can be smelted, which is almost a quarter more efficient than using charcoal. If you don't consider the quality, everyone knows that the surname price of coal and charcoal is the best.

"Not yet!" Yang Zilu's brows furrowed again, he found that there must be more sulfur in this coal than that, because there was too little, but it was impossible for him to continue to burn it once and bury the soil again. If this is the case, then this piece of coal will go to half of the energy, to say the least.

Gong Ion asked suspiciously, "Chief, is there any more problem?" ”

Yang Zilu nodded and said, "There is too little sulfur coming out of this, but if you do it again, I'm afraid this coal will be useless." ”

When Gong Ion heard this, he was also a little depressed, so wouldn't this coal be unusable?

After thinking hard for a long time, Gong Ion suddenly slapped his thigh and said, "Chief! I've got it! ”

"Well, what do you think of?" When Yang Zilu heard this, she was shocked, but immediately turned into ecstasy.

"The process of removing the inside of this coal is almost like making charcoal, and the impurities in it are discharged at high temperatures. Why can't we get bored? Isn't it enough to heat the firewood underneath and cover the iron pot with an iron lid on the top? Gong Ion said with a little excitement.

When Yang Zilu heard this, she immediately understood. But then he frowned and said, "But this is a problem again, the sulfur discharged is corrosive. I can't say that this iron pot has a big hole in less than two times. How many iron pots do you have to use? ”

Gong Cheng frowned, but quickly thought of a way, and said: "This is not a big problem, wouldn't it be enough to make a ceramic kiln come out?" No matter how powerful this sulfur is, it can't corrode the ground, right? ”

Yang Zilu was overjoyed when she heard this, laughed and patted Gong Ion's shoulder, and said, "Not bad!" Gong Ion, I can't imagine that in the end you solved this difficulty. ”

Gong Ion grinned, didn't bow at all, and said modestly: "Then you have to think of a beginning, Chief!" I'm just sewing and mending for you, Chief! Without you, Chieftain, it would be impossible for me to sew and mend if I want! ”

Yang Zilu was even happier and said, "Okay! Don't be modest, I'll reward you with twenty bucks! ”

Hearing this, Gong Ion coughed, and said with a shy face: "Chief, I don't want this reward!" I just want your old man to give me a little bit of that reward! ”

When Yang Zilu heard this, he immediately understood after a little pondering, and looked at Gong Ion with a vigilant face and said, "It's still an old man!" You didn't have the idea of burning knives with me, did you? ”

"The chief is wise!" After Gong Ion was stabbed by Yang Zilu to break the 'conspiracy', he was not as embarrassed as before.

The burning knife was made by Yang Zilu with a retort, and the output was not much. It is all because it is distilled with rice wine, and how much rice wine there is in Jiukuibu is basically fruit wine. And five or six catties of rice wine only have one pound of burning knives, even if it is a tavern run by Yang Zilu's own family, it is only sold in limited quantities every day, only three taels a day, even if it is more than half a tael, Yang Zilu refuses.

Gong Ion doesn't know what the reason is, he likes to burn knives the most, but Yang Zilu's burning knives is only three taels a day. And not to mention the high price, there are still many people who like it, and Gong Ion has only snapped up half of it in the past few days.

Looking at Gong Ion's appearance that if you don't give it to me, you will die here, Yang Zilu couldn't help but have a headache, gritted her teeth and said, "Sanliang, if you don't say a word, don't think about drinking and burning knives in the future!" ”

When Gong Ion heard this, he said with a painful face: "Chief, one catty!" No, half a pound is fine! ”

Yang Zilu turned around and left without saying a word, Gong Ion was helpless, gritted his teeth and said, "Three or two, three or two!" ”

Yang Zilu nodded with satisfaction when he heard this, and while asking people to send three taels of burning knives to Gong Ion, Yang Zilu himself went to find the Chen brothers, ceramic craftsmen. The Chen brothers immediately gave up a ceramic kiln, and at the same time prepared to build three new ceramic kilns on the side, and Yang Zilu also transferred ten slaves with a stroke of the pen. provoked Yu Yu and Xia Hu to grit their teeth, but they were helpless. In their opinion, mining, logging, charcoal making, iron mining, and hunting are now the most important. It's just that these are all very manpower, but Yang Zilu doesn't have a conscious surname at all.

But a day later, when the first furnace of coke came out and was immediately used in the iron-making furnace, they shut their mouths. It took only three and a half hours for coke to smelt iron ore in a furnace. And the quality is very good, a few points harder than pig iron. As long as it is slightly forged, it becomes wrought iron, which is not as troublesome as before.

However, the shortcomings also appeared, the coke was too profitable, and it took three days to appear in an iron-making furnace with many cracks, and it has entered a semi-scrapped posture. Fortunately, there were quite a few iron-making furnaces made in the previous winter, and there were twelve of them. And now the Ordnance Supervisor has only used four iron-making furnaces to produce iron, so there is no need to bother to rebuild and build an iron-making furnace.

;