Four more, and one more!

"Grandpa, what do you think should be done? What went wrong? "Everyone has their own troubles, no, after the Li family solves a round of problems, new problems need to be solved!

Regarding the problem that the newly burned red bricks are not strong, Li Qingshan explained to Li Qingfeng in detail, and Li Hui was also confused, so he could only ask Li Qingfeng!

When the farmer family has not been idle all year round, they took advantage of the two days of free time to remove the grass of the geography again, and the medicinal herbs planted have already grown tender shoots, which is gratifying to look at!

After doing this work, I am anxious to solve the problem of burning bricks, and if the matter is not solved, I always feel like I am pressing a brick in my heart, and I am not comfortable anywhere in my body!

"Think about it! The bricks we burn are complete, but they are not strong, and it is definitely not a problem with the material, so what will happen? Li Qingfeng fell into deep thought!

"It's not a problem of materials, it's a problem of burning, I remember that people burn green bricks, ours is red bricks, could this be the reason?" Li Qingfeng thought that although his family burned bricks, it was different from others, and there had been no red bricks since ancient times!

"Probably not, grandpa, I seem to remember that the master said that this is okay, saying that the green bricks are burned in the brick kiln and then turned cyan after the cellar is stuffy, if it is not stuffy, it is red, and such bricks are also strong, similar to green bricks, and they burn fast!"

Li Hui knew that this was definitely not the reason, and she had also learned the principle when she was in chemistry class, if there was an oxidizing atmosphere in the brick kiln, it would be made into red bricks; After the brick is fired in an oxidizing atmosphere, it is then stuffed in a reducing atmosphere to reduce the red high-valent iron oxide in the brick to a cyan low-valent iron oxide, which is a green brick!

However, the price of green bricks is more expensive, although the durability of red bricks is slightly inferior, but it has almost no impact, modern rural areas are red bricks, and there is no problem with any family, and almost all of the cities are concrete block bricks. This is better, but now this condition cannot be met, and red bricks can only be burned!

"That's a burning problem?" Li Qingfeng muttered to himself. Very confused!

"yes, I figured it out!" Li Qingfeng's words reminded Li Hui!

"Hui'er. What do you think of? Li couldn't bear it anymore when she heard it, and as soon as Li Hui's voice fell, she hurriedly asked, and the others also stared at Li Hui!

"You see, since there is no problem with the materials and the brick kiln method, the only thing left is to burn the fire!" Li Hui uses the most common method of elimination!

"What's wrong with the fire?" Isn't it just a fire? There will be problems with this, and everyone will not understand!

"You think, if you take something and burn it slowly with fire, it won't be a problem, but if you burn it directly, it will definitely be easy to crack, like a clay pot or something!" Lee will give examples! It seems that some things are easy to crack when exposed to high temperatures, and the bricks may be calcined directly in high temperatures, which destroys his stability, so this problem occurs!

"We should start with a slow fire and wait for the temperature in the cellar to go up before changing the fire. I guess we burned too hard at the beginning! Li Hui continued to explain and made suggestions!

When you think about it, it seems to make sense!

"Yes, grandpa, it's like burning eggs, if you put it on fire directly, it will crack, and it won't crack if you bake it slowly and put it on again!" Li Xiu suddenly remembered the scene when he secretly baked eggs by himself before, he was inexperienced at first, and he always burned out, but then he won't. Know to take your time!

I'm a little embarrassed to talk about this, then the family will be poor, so I raise a few chickens to lay eggs or supplement the family, but I don't know how to do it. Occasionally, I steal an egg and bake it secretly, and I bring my younger brothers with me! Then you will think that the eggs are so delicious and delicious!

As soon as Li Xiu mentioned this, Niu's, Hu and others remembered that there was a time when there were always few eggs at home, and they thought that the hens were not diligent. Resting? It turned out that it was stolen by the children, but now life is better. I don't care about those small things like old sesame seeds and rotten grain!

"There's such a thing, you can try it like this!" Everyone has a similar experience, who hasn't been naughty when they were young! Li Qingshan nodded and agreed with this method!

"We agree too! Try again! "Both men and women think it's a good idea!

"Well, that's it! Go back and get ready to burn again! "Li Qingshan made a plan after everyone's consent!

"It just so happens that the herbs have just been weeded, and we don't need to manage it recently, so let's do it as soon as possible, or we won't be too busy!" This year, the Li family has been working non-stop, and the time is arranged tightly!

With the experience of the first two times, this time it went very smoothly, there was no situation where the bricks were not well laid, and the firewood was not enough, this time it was orderly from beginning to end, each performing its own duties, and the four brothers of the Li family just had to master the heat!

Busy time always flies quickly, unconsciously, it has been burning for another twenty days, this time it has poured more effort, every day of the fire, the amount of firewood added are clearly remembered!

Things don't work out the first time, but this time it's obviously much better than the last one, but not to the extent that everyone is satisfied!

"Our bricks are not only for our own use, but will definitely be sold in the future, the quality must be good, and we can't pit others!" Li Qingshan is not very satisfied with this result, to build a house, the first thing must be strong and durable, or live in a thatched house, what are you doing with a brick house!

"Yes, Dad, let's just try two more times!" Li Anfu also agreed with Li Qingshan's statement, for long-term consideration, since he decided to do this, he must do his best!

"Old man, the family's money has been spent recently!" and keep the accounts of the house. Niu Shi saw that there had been no results, and he was very anxious, he planted medicinal herbs, sent his grandson to school, bought wasteland, and had such a long time of experiments, and the family had to prepare food to replenish his body, and the money he earned from selling medicinal materials was almost gone!

"How many more?" Li Qingshan asked.

"The scattered ones add up to more than twenty taels!" Niu has just counted the family's silver, and there is only so much left of it, so it can only last for two months, and now the family does not go out to work, and there are expenses every day!

No matter how much money you have, you can't hold it up!

"If you can last for two months, let's keep going!" Li Qingshan gritted his teeth and fought hard, seeing that he was about to succeed, he must not give up, or the efforts ahead would be in vain, and it would be a big deal to return to the pre-liberation period!

"Old woman, just insist on it first, and the medicinal materials should be collected in two months, and there will be income!" Li Qingshan is determined this time! (To be continued.) )