At this moment, Li Zhongyi suddenly heard a familiar voice, "No blame, look at your gray face, what are you busy with?" ”

Li Zhongyi turned his head and couldn't help but be overjoyed, but saw that Murong Yanzhao, who was dressed in military uniform, was walking towards him with a smile.

Hehe, the labor force who helped blow the wind was automatically delivered to the door.

No need to ask, Murong Yanzhao is dressed like this at this time, and he must have brought troops to change his defense.

Sure enough, Murong Yanzhao walked up to Li Zhongyi, arched his hand and said, "Brother Fool was ordered to lead someone to take over the defense of the entire Sansi case, and please take care of it without blame." ”

Li Zhongyi didn't care about the yellow mud and black ash on his hands, grabbed Murong Yanzhao's arm, and hurriedly asked him, "Brother Hualong, how many soldiers and horses have you brought here?" ”

Murong Yanzhao said with a smile: "There are five commanders and nearly three thousand soldiers and horses. However, if you want to use the forbidden army under Brother Fool, you must bring the good food and wine from your house, so that the general can eat and drink enough, and then consider it. ”

Li Zhongyi smiled and punched Murong Yanzhao's chest gently, and said angrily: "First lend me three hundred strong soldiers, and wrap the meat and vegetables on my body." ”

Anyway, there was still 10,000 yuan in the public account of the arrow workshop, which was locked in the warehouse, and Li Zhongyi simply took it out to improve the food of the forbidden army in line with the principle of not spending money in vain, but spending it in vain. ”

"Cheng, Lao Tzu knows that you will not treat the brothers badly." With the deep friendship between Murong Yanzhao and Li Zhongyi, it is not enough to worry about trivial matters.

The blowing wind is purely physical, with the help of Murong Yanzhao's hundreds of forbidden troops. Li Zhongyi had more than thirty craftsmen available at hand.

The crucible in the iron-making furnace was filled with a mixture of pig iron and charcoal, starting with Xie Xiaosan's complete ignition of the fuel. The whole process of heating and melting pig iron lasted more than three hours.

Xie Xiaosan used an iron hook to break the yellow mud sealed at the bottom of the furnace, and then hooked the refractory stone, and saw that the fiery molten iron flowed directly into the refractory mixing pit along the refractory road.

Li Zhongyi was separated by more than two zhang distance. He still felt the heat rolling, and the scorching breath forced him to take several steps back.

"Stir quickly, stir vigorously." With Xie Xiaosan's shouting. Seven or eight craftsmen, holding thick wooden sticks in their hands, stirred vigorously in the molten iron puddle.

Li Zhong is easy to feel. The stick reached into the boiling molten iron. After only one stirring, the front end was burned several inches shorter.

Just when everyone was stirring the molten iron, Xie Xiaosan picked up a small crucible and scooped up a spoonful of iron liquid in the molten iron puddle.

Li Xiaoqi had already prepared, and he used a few pieces of soaked wet linen cloth to wrap the ends of the iron fire tongs and tightly clamp the hollow mud arrowhead. And let the gulp face up.

Xie Xiaosan slowly tilted the small crucible and slowly poured the iron juice into the hollow part of the mud arrowhead.

Li Zhongyi's eyes widened. Keep an eye on the whole process, lest you miss the slightest bit of useful information.

Under the command of Xie Xiaosan, while the iron juice was gradually cooling but not completely solidified, an iron rod prepared in advance and about the thickness of a wooden arrow shaft was inserted into the iron juice to facilitate the installation of the arrow shaft behind.

Li Zhongyi noticed that this process link is extremely dangerous, and if you are not careful, the iron juice will spill on people, and something will happen.

Well, this is not a one-shot deal, but it takes 50,000 repeated operations, and the proportion of accidents is surprisingly high.

Li Zhongyi finally came up with a way to build an operating table made of masonry and loess to separate the operator from the iron juice.

Because it was the first time to cooperate, there was no tacit understanding, Xie Xiaosan and Li Xiaoqi joined forces to only pour twenty mud arrows before the iron juice in the molten iron pit cooled.

Li Zhongyi summed it up afterwards, mainly because there were too few fixed pits for arrows dug, and if more than 30 pits were prepared at a time, the efficiency would be many times higher.

Although Li Xiaoqi was very careful, when he picked up the arrows with iron chopsticks, he still broke several arrows, wasting the molten iron, not to mention delaying the work.

Li Zhongyi pondered carefully, and now the problem is on the iron chopsticks, the thick and round iron chopsticks are too strong, and it is easy to break the dry mud full of iron juice.

Since it is not good to use iron chopsticks, then simply use two bamboo boards with a wide cross-section to clamp, after the real yàn, it is really not broken.

The problems were solved one after another, Li Zhongyi was too busy, the sky was already dark, and he simply lived in the official room that night.

Although he could not do fine work at night, he could light torches and thin yellow mud to make hollow mud arrowheads, and use a hand-cranked stone mill to polish the wooden arrow shafts that had been sharpened into rudimentary shapes.

Li Zhongyi wandered around, while thinking to himself, in addition to the assembly line operation, it is completely possible to take three shifts, day and night to make arrows, polish, and put on arrows.

According to Li Zhongyi's own estimates, according to the three-shift model, the efficiency of arrow-making will be increased by at least 5o%.

Everything else is okay, and the skilled blacksmith is Xie Xiaosan alone, which greatly restricts the efficiency of production.

What should I do?

Li Zhongyi had no other good way for the time being, so he could only go into battle by himself, and follow Xie Xiaosan step by step to learn the method of frying steel.

After a day of exposure to the sun and a night of baking, there are more than 1,000 hollow mud arrows that can be used.

When Xie Xiaosan was frying steel, Li Zhongyi stood beside him with charcoal in his hand and a stack of white linen paper, carefully staring at his every movement.

After careful observation, Li Zhong easily realized that Xie Xiaosan was only inferred from experience many times, and there was no precise operation guide.

Li Zhongyi feels that everything else is secondary, and there are two main points, one is the mixing ratio of pig iron and charcoal, and the other is what happens after the molten iron is melted?

The first question, Xie Xiaosan answered with an inaccurate rod scale, four catties of pig iron were smashed, and eight catties of charcoal were matched.

Li Zhongyi doesn't know where Xie Xiaosan's ratio comes from, and at present, for emergency purposes, as long as the top is used, it is enough.

As for climbing the tech tree, there will be time to do it in the future. It's just something that can't be rushed.

Xie Xiaosan told Li Zhongyi that the temperature of the sealing mouth of the molten iron should be three feet away. You can feel the amazing ironing, which means that the iron has melted.

Li Zhongyi was speechless for a while, but fortunately, he had a reference, which was better than nothing.

When the first molten iron was baked in the morning, Li Zhongyi observed the whole process, and he appeared. Xie Xiaosan did stretch out his hand from time to time to test the hot hand of the sealed door through the air.

Well, the Confucian scholars don't look down on lowly craftsmen at all. It is very hand-written to leave a written record, and the unique skills of many craftsmen will be lost as long as they go through war or fire.

This time out of the molten iron. Because Li Zhongyi had arranged dozens of craftsmen in advance. At the mercy of the hollow mud arrows, Xie Xiaosan's progress in pouring molten iron has been much faster.

This furnace of molten iron was filled with a total of 300 mud arrowheads, and Li Zhongyi pondered, in addition to Xie Xiaosan, if he made a few more refractory crucibles, the degree would be doubled.

With this realization. The big stone that had been hanging in Li Zhongyi's heart finally breathed a sigh of relief.

looked at Xie Xiaosan, who was filling the iron-making furnace. An idea suddenly popped into Li Zhongyi's mind, can you build a small iron-making furnace?

According to Li Zhongyi's observation, the iron-making furnace operated by Xie Xiaosan is only more than 300 catties of molten iron at a time.

Since Murong Yanzhao was replaced by Murong Yanzhao who led the troops to garrison the arrow-making workshop, Li Zhongyi no longer lacked strong men who bounced the wind, at most he brought a pig every day.

Pork is cheap, even if it has a fishy smell, when cooking, as long as you add more dogwood and spices, you can cover up part of the fishiness.

After listening to Li Zhongyi's question, Xie Xiaosan touched his head and said, it will take at least ten days to build such an iron-making furnace, and it will also require refractory clay and other things.

When Li Zhongyi heard this, he was satisfied, with Murong Yanzhao's military man, as long as he got all the refractory materials, he could even build three or five iron-making furnaces at the same time.

Li Zhongyi is a master of traditional Chinese medicine, and he is very unfamiliar with ironmaking, but he knows some main materials, such as clay, graphite, quartz and other substances with high melting points.

Li Zhongyi was in the Later Shu Kingdom, when refining the elixir to fool Meng Chang, he added clay and graphite to the inner wall of the Dan furnace he built.

The main component of the high-temperature resistant crucible is known to Li Zhongyi, that is, alumina, or corundum.

Under the current conditions, there is definitely no way to purify alumina in the short term. However, Li Zhongyi can make a crucible that is very resistant to high temperatures from clay containing a lot of silicon.

Since he only needed to scoop out the molten iron from the stirring puddle, Li Zhongyi felt that it was enough to make the small crucible the size of a wooden spoon for scooping water, which facilitated the convenience of operation.

Next to the iron-making furnace, there was leftover clay everywhere, Li Zhongyi nodded frequently after looking at it, black graphite and quartz are not common.

However, it doesn't matter, after the molten iron is stirred, its temperature is only a few hundred degrees. The small crucible that Li Zhongyi roughly made should be able to withstand the burning of at least 1,000 degrees.

When making zuò by hand, Li Zhongyi considered that he still needed a larger crucible, so he simply did it together.

Li Zhongyi dug a big hole in the middle of the clay, and then kept adding water, adding more clay. When the clay was half dry and half wet, Li Zhongyi simply took matters into his own hands and pinched out ten small crucibles with handles, and made five crucibles that were roughly the same shape as those used by Xie Xiaosan.

When a kiln of molten iron came out, Li Zhongyi asked Xie Xiaosan to stuff the crucible he made and the charcoal as fuel into the small furnace by the way, and then sealed the kiln door with clay.

Fifty soldiers, shirtless, sweating like rain, took turns pushing and pulling the blower bag, and the temperature of the furnace went up at once.

After more than an hour, Li Zhongyi felt that it was almost there, so he asked Xie Xiaosan to poke open the sealed clay and take out the large and small crucibles one by one with fire tongs.

Li Zhongyi carefully inspected it, and the long handles of the small crucible were broken, but the large crucible was intact.

Succeed with flying colors! (To be continued!)

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