Lin Feng did not pay any attention to Wei San and the others, and practiced on his own. He used his body as a weapon, with his body as the axis and joints as the fulcrum, and hit it with one move, following the body's castration. He came with pleasure, and he had seen a series of boxing attacks in his previous life, Thai whip legs, Taekwondo high legs, grappling techniques and anti-joint techniques, which were mixed with him, and he could pick it up at will, and it was extremely smooth.

Lin Feng stepped out with his last foot, and a shallow footprint was suddenly shot out on the ground in the yard, which contained all his strength.

I seemed to have realized the way of using power. Lin Feng shouted in his heart.

However, Lin Feng quickly calmed down and had never heard of anyone who could achieve great martial arts by just one random trick. Success must be rooted in a solid foundation. If you punch a thousand times, your body movements will appear. Immediately, Lin Feng once again carefully practiced the condom taught by Wei San again, 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, calming his body and mind.

Half a day later, the six brothers and brothers of Lin Feng came to Sun Cuo's shop hand in hand. There was no change outside the shop, but as soon as they entered the yard, Lin Feng found that the yard had become a small construction site. Sun Cuo waved a few pieces of paper in his hand, his face was exhausted but with a red light, and was yelling at a group of reporters: "Be careful. You, you, no, the mouth should be blocked there!"

Lin Feng smiled. This "wrong brother" is really impatient. It seems that he must have been studying the few pieces of paper he sent last night, so he must have not had a good rest.

"Mr. Lin." Sun Cuo saw several friends stopping their work, and then followed their eyes to find Lin Feng and immediately ran over. He ran to Lin Feng. He eagerly opened the papers, "I don't know much about some parts, please give me some advice."

When Lin Feng saw that it was the ones he asked Chen Fei to send him that the drawings did not look like the drawings.

Lin Feng painted two furnaces, one was a coke furnace and the other was a blast furnace. In his thoughts, since the method of refining steel has not made much progress in the next few hundred years, it shows that he encountered the bottleneck problems brought about by the development of productivity at that time. For example, the requirements for wind blowing, the requirements for refining coal media, and the requirements for model texture outside the instrument.

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

In Lin Feng's impression, the fuel in China's smelting industry went through three stages: charcoal-coal-coke. The initial charcoal, due to its low ignition point and short fire duration, is difficult to grasp the fire, which will directly affect the smelting level of steel. As for coal, although the combustion temperature is high and the combustion duration is longer than charcoal, coal is easily broken after being heated in the furnace, affecting the air permeability of the furnace. Moreover, China's coal fields mostly contain high sulfur, which directly affects the quality of pig iron, and can only find new fuels.

Coke was first discovered in China during the smelting process. The earliest coke discovered in my country was discovered in a late thirteenth century site in Xinhui, Guangdong. The corresponding dynasty should be the Southern Song Dynasty. This coke was also the earliest coke found in the world. In Europe, Britain began to use coke to make iron in 1788 until more than 500 years later. However, in historical materials, the earliest records of coke and use coke appeared in "Physical Knowledge" written by Fang Yizhi in the late Ming Dynasty. He pointed out that coal is everywhere, "the odor burns and melts it and closes it to form a stone, and then chisels it into a furnace and is called a reef (i.e. coke). It can be fired for five days, and it is very labor-saving." The odor mentioned here should refer to coke coal with a large amount of volatiles.

Coke is obtained by heating bituminous coal to 950-1050℃ under the condition of isolating air, and after drying, pyrolysis, melting, bonding, solidification, shrinkage and other stages, that is, the so-called dry distillation (heating separated from open flame). It retains the advantages of coal and avoids the disadvantages of coal.

Lin Feng had never seen the appearance of a coking stove, so he could only draw a stove as he imagined. Below was a boiler that could be sealed. The upper part was like a sealed teapot, with a thin layer of clay as the bottom, put it in coal, and then sealed it all, leaving only a chimney at the top.

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

In fact, Lin Feng really regretted it. If he had known that he would travel through time, he would not have been able to visit the coke stove on site. He would have to Baidu anyway. It would be great to know more details of the stove. It seems that he can only explore it slowly in practice.

Lin Feng decided to be honest, and pulled Sun Cuo aside, and said solemnly: "I also painted it according to the imagined principles while thinking. You must be mentally prepared for failure. However, I can teach you a way to reduce failure, that is, the experiment."

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

"The former furnace is used for coking. Coke should be more resistant to burning than coal and is a good fuel. The latter furnace is used for batch steelmaking. In this way, when making furnaces, you can make several types according to their size, and then during the refining process, carefully record the time when each furnace produces coke or molten steel. By comparing their mass, we can determine how much furnace charge is filled and how long it will be burned, and what to pay attention to in the middle." Lin Feng could only use later experimental methods to make Sun Wu "trial and error".

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

"Brother Sun, don't worry about this for a while. I want to ask, arrange for Chen Fei and a few children to learn craftsmanship from you, do you have no objection?"

"Of course not. These children listened carefully when studying, acted very carefully, and respected me, the so-called teacher, but they were much more down-to-earth than those of me." Sun Cuo smiled.

"Then please Brother Sun, please pay more attention to me and see which one likes this industry the most, which is the most attentive and has the most potential. I am going to find the job that suits them the most and also their favorite." Lin Feng said with a smile.

"These children are all very good, willing to endure hardships and work hard. In comparison, Li Chun is more serious," Sun Cuo recalled.
Chapter completed!