Eight Hills in the Eastern Jin Dynasty

Liu Yu replied without hesitation: “Naturally it is a good time to master the fire!”

Murong Nan nodded: “What’s the fire, how to master it?”

Liu Yu said with a smile: “The fire is just looking at the color of the fire. When it is cyan, it happens to be when the molten steel can be melted. Waiting, it is usually about to start cooking at this time. I have not watched it less recently. “

Murongnan continued: “Then you know, what needs to be done to make the fire become this cyan? What kind of material should be used to make the fire, how to set up the furnace and blast?”

Liu Yu froze for a moment, but he didn’t care much about these things. In these days in the blacksmith camp, he only learned to watch the blue fire and asked Murong Nam to ask him, and then he began to think carefully about the steel making in these days. experience.

As he thought about it, he said, “Our stoves are all made of clay, with a special layer of clay inside. It is said to prevent a violent fire from blowing up the stove, and the heat emitted above it also passes through a stone The piping is returned to the furnace to make the fire stronger. As for the blast, it is by pulling the bellows. The person who blasts needs excellent strength and strong endurance, and often has to pull it for one or two hours at a time. I have drummed a few times, but it is much more tiring than iron, so I usually have to rotate in half an hour. “

Murong Nan nodded: “It’s quite good to be able to pour hot air back into the furnace repeatedly and use this closed blast furnace. It seems that Zhongyuan’s iron smelting technology is very high. However, have you ever noticed, What is the fuel thrown into the furnace? “

Liu Yu’s eyes lit up and said, “Isn’t it charcoal?”

Murong Nan smiled and shook his head: “It seems that you haven’t observed it carefully. If only the charcoal obtained by logging is burnt, you can’t make the fire blue, and you can’t make steel. You put it. It ’s not charcoal but graphite, or coal! ”

Liu Yu surprised: “Graphite?”

Murong Nanzheng said: “Yes, this graphite is a black thing buried in the ground. Using it as a fuel, the fire burned can become blue. If only charcoal is used, the most burnt is cast iron. The color of the fire in the furnace will only become crimson, and it will never turn blue. There is no way to talk about steelmaking. “

“Liu Yu, I do n’t know if you have paid close attention to it. After adding charcoal powder, the pig iron and wrought iron become steel, and then these steel blocks have to be re-refined many times to remove their impurities. After this kind of carbon powder is oozed out, it will condense into a black, small spherical shape. This is graphite, or coal. “

Liu Yu thought of the steel-making situation, and it was exactly the same as he said, nodding: “You are right, there are such small black particles, this is graphite?”

Murongnan smiled slightly: “Yes, this is graphite. Use this graphite as fuel to make steel. Now you should know why the fire turns blue.”

Liu Yu sighed: “I still observed it too coarse, and I didn’t even pay attention to it. Thank you for your reminder. Is there any way you can make this fire outside the cyan color, change other colors, make more Strong steel comes out? “

Murong Nan shook his head: “We don’t have this ability. In fact, these things were not discovered by the blacksmith at the earliest, but by the alchemists who discovered that they needed to heat the furnace for alchemy, so they tried everything in the world, and finally they can last , And provide such a fierce fire steadily, so that the fire turns blue, only graphite. “

Liu Yu’s eyes flashed a bit of disappointment: “Since there is no better fuel than graphite, how can we make good steel?”

Murongnan smiled slightly: “Actually, I want to tell you, not to say how hot the furnace can be, but how to make the extremely hot molten steel cool down quickly.”

Liu Yu’s expression changed: “Cool?” His brain was like electro-optical flint. When he first thought of seeing Kong Jing, there was a guy who tried to use river water instead of playing the early spring water for laziness. After sufficient charge, Kong Jing broke a finger.

He nodded thoughtfully: “I understand what you mean. Master Kong takes this cooling thing very seriously, and he will even severely punish those servants who fetch water. It seems that you are here Are you fooling with the method of cooling? “

Murong Nan nodded: “This is what I want to tell you. You Han people will only try their best to make a fuss about the quality of the water, either using snow-covered water, or the mountain spring water in the morning, or Clear streams, and so on, but you never thought that everything in this world is more than water to cool things. “

Liu Yu’s eyes lit up: “What else can cool down?”

Murong Nan laughed: “That’s why we Hu people can build a good soldiers and armour, because we deal with livestock all day, so we can invent these hot red steels, or cool them quickly or slowly. The solution. That’s the urine and grease of cattle and horses! “

Liu Yu’s eyes widened: “What, using urine and grease can control the cooling rate?”

Murong Nan nodded: “You can try it yourself, from extreme heat to normal temperature, this is quenching. Generally speaking, the colder the ice, the faster the cooling rate, but the cooling time It ’s not easy to master. After all, water is water after all. Even if the material is different, it wo n’t be too different. It ’s just the difference between stainless steel and good steel. “

“But if you control the quenching time ~ www.wuxiax.com ~ put it in horse urine, it can be smelted into steel after a moment, and put it in grease, you can slowly cool down after a night, this time What you get is not ordinary steel, but something between steel and wrought iron. On our grassland, extremely hard steel is called wrought iron, and this kind of steel is The thing with the wrought iron is called Zhizhirou. Now you know how they came. “

Liu Yu smiled, grabbed Murong Nan’s hand, and shook it hard: “Brother Murong, you really helped me a lot!”

At the moment of grasping Murongnan’s hand, Murongnan was like an electric shock and instinctively wanted to withdraw this hand, but he was holding it tightly with Liu Yu’s iron-clamped hands. Yu could even feel the sweat in his palms, and his expression quickly became extremely unnatural.

Liu Yu was a little too excited under the ecstasy. When he saw Murongnan like this, he reacted and released his hand and smiled, “I’m sorry, I’m so happy, I’m a little rude.”

Murongnan hooked his mouth, stood up, and said coldly: “I hope that what I said will be helpful to you, I’m gone, I wish you success.”) !!