Lin Feng didn't pay any attention to Wei San and them, and practiced on his own. He uses his body as a weapon, with the body as the axis and the joints as the fulcrum, and strikes out with one move, following the castration of the body, followed by the strike. He came casually, and what boxing serial strikes, Thai whip legs, taekwondo high legs, and grappling anti-joint skills that he had seen in his previous life were all mixed in by him, and he was very smooth.

Lin Feng stepped out with a quick kick, and the strength containing all his body strength suddenly struck a shallow footprint on the ground in the courtyard.

I seem to have realized how to use my strength. Lin Feng shouted wildly in his heart.

However, Lin Feng quickly calmed down, he had never heard of it, whoever fights randomly can achieve martial arts, success must be rooted in a solid foundation, punch a thousand times, and the body will appear on its own. Immediately, Lin Feng once again carefully practiced the tricks taught by Wei San, but it was obvious that his movements were much smoother and faster than before.

Lin Feng finished his morning exercise and poured a large basin of cold water on his head and body, calming down his body and mind.

Half an hour later, the six Lin Feng brothers came to Sun Cuo's shop hand in hand. There was no change outside the shop, but as soon as he entered the courtyard, Lin Feng found that the courtyard had become a small construction site, Sun Cuo was waving a few pieces of paper in his hand, his face was tired but glowing red, and he was yelling at a group of guys: "Be careful." You, you, no, there should be a mouth sealed! ”

Lin Feng smiled, this "wrong big brother" is really an anxious child. It seems that he must have been studying the few pieces of paper he sent last night, and he must have rested well.

"Mr. Lin." Sun Cuo saw that a few guys had stopped what they were doing, so he followed their gaze and found Lin Feng and immediately ran over. Running to Lin Feng, he eagerly opened the few pieces of paper, "I don't understand some things, please give me some advice." ”

Lin Feng saw that it was the few drawings that he asked Chen Fei to send that were not like the sketches.

Lin Feng painted two furnaces, one is a coke furnace and the other is a blast furnace. In his thoughts, since there was no progress in the refining of iron and steel for hundreds of years, it indicated that he had encountered the bottleneck problem caused by the development of productive forces at that time. For example, the requirements for wind blowing, the requirements for coal refining media, and the requirements for the exemplary texture outside the vessel.

Since it is a bottleneck, it must not be so easy to solve, Lin Feng can only start from the details.

In Lin Feng's impression, the fuel of China's smelting industry has gone through three stages: charcoal, coal and coke. The initial charcoal, due to its low ignition point and short fire duration, is not easy to master the fire, which will directly affect the smelting level of steel. As for coal, although the combustion temperature is higher and the burning duration is longer than charcoal, the coal is easy to break after being heated in the furnace, which affects the air permeability of the charge, and China's coal fields contain high sulfur, which directly affects the quality of pig iron, so we can only find new fuels.

Coke was first discovered in China during the smelting process. The earliest coke found in China was found in a late thirteenth-century site in Xinhui, Guangdong, and the corresponding dynasty should be the Southern Song Dynasty, and this piece of coke is also the earliest coke found in the world. In Europe, Britain did not begin to use coke to make iron until more than 500 years later, as early as 1788. However, in historical materials, the earliest record of coking and coke appeared in the late Ming Dynasty Fang Yizhi's "Physics Knowledge", he pointed out that coal is everywhere, "the smelly one burns and closes it into stone, and then chisels into the furnace and says the reef (that is, coke), but the fire can not stop for five days, frying ore and cooking stone, which is very labor-saving." The odor referred to here should refer to coking coal with more volatile substances.

Coke is obtained by bituminous coal heated to 950-1050 °C under the condition of air isolation, and goes through the stages of drying, pyrolysis, melting, bonding, solidification, shrinkage, etc., that is, the so-called dry distillation (separated from open flame heating), which retains the advantages of coal and avoids the disadvantages of coal.

Lin Feng had never seen a coking stove, so he could only draw a furnace according to his imagination, the bottom was a boiler with a mouth that could be sealed, and the top was like a sealed teapot, with a thin layer of clay as the bottom, after putting in the coal, and then sealing the whole body, leaving only a chimney at the top.

The other furnace is an urn-shaped blast furnace. This is Lin Feng's method of self-blowing air converter steelmaking. A closed, movable blast furnace is erected on a wooden frame, lined with magnesia or dolomite (alkaline). A pipe is erected on the furnace, one end is placed in the furnace, and the other end is connected to a blowing bag to facilitate the blowing in. Iron blocks are put into the furnace to be burned into liquid ecology first, and then slag materials such as lime, quartz, and fluorite are added. During this period, scrap steel or a small amount of cold pig iron and ore can also be added to adjust the temperature.

In fact, Lin Feng really regretted it in his heart, he knew that he would cross over, and he couldn't go to the site to visit the coke oven, so he had to go to Baidu anyway, and he knew how good the details of some furnaces were, it seemed that he could only slowly explore it in practice.

Lin Feng decided to be honest, pulled Sun Cuo aside, and said solemnly: "I am also in the process of thinking, according to the principle of imagination, you have to be mentally prepared for failure." However, I can teach you one way to reduce failure, and that is the experimental method. ”

Sun Cuo was a little disappointed at first, but when he heard that there was a remedy, his eyes immediately lit up again: "Mr. Lin, please speak." ”

"The former furnace is used for coking, coke should be more resistant to burning than coal, and it is a good fuel, and the latter furnace is used for bulk steelmaking. In this way, when you make a furnace, you build several types according to the size, and then carefully record the time of coke or molten steel in each furnace during the refining process, and determine how much charge to fill next time, how long the burning time, and the matters that need to be paid attention to in the middle. Lin Feng can only use the experimental methods of later generations to make Sun Cuo "trial and error".

"Okay, I'll do what Mr. Lin said." Sun Cuo turned around and was about to go to work, but was caught by Lin Feng:

"Brother Sun, don't be in a hurry for a while. I want to ask, arrange for Chen Fei and a few other children to learn the craft with you, do you have no opinion? ”

"Of course not. These children listened carefully when studying, moved very carefully, and respected me as a so-called teacher, which was much more down-to-earth and pleasing to the eye than my buddies. Sun Cuo smiled.

"Then please Brother Sun, help me pay more attention to see which one likes this industry the most, has the most intentions, and has the most potential. I'm going to find the best job for each of them, and one of them that they like the most. Lin Feng said with a smile.

"These children are very good, willing to endure hardships and work hard. Comparatively speaking, Li Chun is more serious. Sun Cuo recalled.

"Okay, Brother Sun, go get busy." Lin Feng let go of his hand at this moment. Thinking of the smelting notes that Li Chun read under the lamp last night, this Li Chun is suitable for this industry, in the future, after Sun Cuo's business grows bigger, he must find a middleman who connects him and Sun Cuo, and it seems that he can cultivate this Li Chun well.